Source: UNIV OF ARKANSAS submitted to NRP
IMPACT OF BIOCHAR AMENDMENT ON ANTIBIOTIC RETENTION AND SOIL QUALITY IMPROVEMENT
Sponsoring Institution
National Institute of Food and Agriculture
Project Status
COMPLETE
Funding Source
Reporting Frequency
Annual
Accession No.
1015146
Grant No.
2018-38821-27751
Cumulative Award Amt.
$500,000.00
Proposal No.
2017-07442
Multistate No.
(N/A)
Project Start Date
Feb 15, 2018
Project End Date
May 14, 2022
Grant Year
2018
Program Code
[EQ]- Research Project
Recipient Organization
UNIV OF ARKANSAS
(N/A)
PINE BLUFF,AR 71601
Performing Department
(N/A)
Non Technical Summary
Resourse recovery and reuse for agriculture are key components for sustainable development. However, waste reuse also introduced unwanted chemicals such as antibiotics into agriculture soils. Developing crop residues utilization techniques to effectively sustain soil fertility is a major challenge and opportunity for UAPB to advance the knowledge of the agricultural sustainability. The proposed project is aimed at developing an interdisciplinary research program to maximize the ability of biochar as a soil amendment on antibiotics retention and toxicity reduction. A variety of agricultural-residue-derived biochars will be produced through slow-pyrolysis at different process conditions. Critical physicochemical properties that may influence the residue-derived biochar as a soil amendment to remove antibiotics will be determined in laboratory. In particular, it will focus on an in-depth understanding of physical, chemical, and biological processes that control the interactions between pharmaceuticals and biochars and their impact on soil and crop systems. The specific objectives are: 1) to determine the sorption ability and mechanisms of a variety of biochars produced from agricultural residues to antibiotics; 2) to identify the fundamental processes affecting biochar as an amendment in reducing the leaching of pharmaceuticals in soils irrigated with recycled water; and 3) to evaluate the ecotoxicological effects of pharmaceutical-laden biochars on soil microbial communities and crop growth. Integrated with crop science, soil science and animal science programs, successful completion of the proposed project will increase UAPB's research capacity on soil ecosystem resilience in intensified crop systems. To this end, we will develop a holistic platform which continues to evolve.
Animal Health Component
30%
Research Effort Categories
Basic
30%
Applied
30%
Developmental
40%
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
4030110202050%
1330199200050%
Goals / Objectives
The proposed project is aimed at developing an interdisciplinary research program to maximize the ability of biochar as a soil amendment on antibiotics retention and toxicity reduction. A variety of agricultural-residue-derived biochars will be produced through slow-pyrolysis at different process conditions. Critical physicochemical properties that may influence the residue-derived biochar as a soil amendment to remove antibiotics will be determined in laboratory. In particular, it will focus on an in-depth understanding of physical, chemical, and biological processes that control the interactions between pharmaceuticals and biochars and their impact on soil and crop systems.
Project Methods
Laboratory experiments will be conducted systematically to evaluate the feasibility, impacts, and benefits of biochar technology to safeguard soils with reclaimed water irrigation or animal manure fertilization. These methods are designed to accomplish the four specific objectives individually, and thus accomplish the long-term research goal. The collaboration among the PIs on the proposed project brings together expertise in interdisciplinary and multi-scale research.

Progress 02/15/18 to 05/14/22

Outputs
Target Audience:USDA employees, farmers, the local public, external organizations (such as Environmental Protection Agency (EPA), Environment Quality Observatories), and academia. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?Through this project, sixundergraduate underrepresented students were working on this project as full-timesummer intern. We also educated ficemaster's students working on biochar engineering to maximize the capacity of biochar for pollution control. We also supported allmaster students to attend international conferences to present their work and attend workshops. With close cooperation with the University of Florida, we already have fourpapers published intop journals and one under preparation. During the project duration, three posters presented by master students have beenlisted as the top three in international competitions in the biochar community. We presented two oral presentationsat national conferences; also presented three posters at rural life conferences for the local community. Through the funding support from the NIFA-CBG program, we have signictanly enhanced UAPB's biochar and environmental scienceresearch and education. We will continue this research topic to maximize the impact on building research capacity and contributing to the sustainable agriculture community How have the results been disseminated to communities of interest?We have participated in and presented more than tenposters and more than fiveoral presentations at academic conferences for professional communication andlocal community conferences for technology dissemination. We are integrated with UAPB small farm program to integrate biochar education into our regular education programs. We have also collaborated with local lumber mills and rice mills to introduce biochar technology to the local agricultural industry. What do you plan to do during the next reporting period to accomplish the goals? Nothing Reported

Impacts
What was accomplished under these goals? Through the support of the 1890 Capacity Building Grant, the University of Arkansas at Pine Bluff (UAPB) has successfully initiated a biochar research program to convert agriculture waste to value-added products. Specifically, We have utilized local agricultural waste such as rice husk, corn cob, and lumber for biochar production, characterization, and optimization for both metal and organic pollution control. Most importantly, we have designed innovative modificationmethods to add an additional functional group or active sites to enhance the pollution capacity of biochar. The effect of both unmodified biochar and modified biochar on reducing organic pollution's mobilityhas been proven. Besides, coupled with persulfate the modified biochar can also degrade the organic contaminants. The effect of biochar on reducing pollution toxicity hasalso been tested in greenhouse experiments by promoting sweet potato growth in copper-contaminated soil. We also conducted biochar characterizationto understand thephysical-chemical properties of biochar such as additional surface area; magnetic properties. Mathematical modeling is used to identify the reaction mechanisms. This research will significantly benefit the transformation of agricultural waste into valuable products for pollution control. These biochar production and modification methods are cost-effective and can be scaled up for large scale production

Publications

  • Type: Theses/Dissertations Status: Awaiting Publication Year Published: 2020 Citation: BIOCHAR MODIFICATION WITH HEMATITE AND GOETHITE FOR EFFICIENT PERSULFATE ACTIVATION AND POLLUTION DEGRADATION
  • Type: Theses/Dissertations Status: Awaiting Publication Year Published: 2020 Citation: Nitrogen-Doped Rice Husk Biochar to Activate Persulfate and to Remove Contaminants
  • Type: Journal Articles Status: Published Year Published: 2020 Citation: Simms, Tatum, Hao Chen, and Gena Mahato. "Dose-dependent Effect of Biochar as Soil Amendment on Reducing Copper Phytotoxicity and Mobility." International Journal of Environmental Research 14.6 (2020): 751-759.
  • Type: Journal Articles Status: Published Year Published: 2020 Citation: Huang, J., Zimmerman, A. R., Chen, H., & Gao, B. (2020). Ball milled biochar effectively removes sulfamethoxazole and sulfapyridine antibiotics from water and wastewater. Environmental Pollution, 258, 113809. doi:10.1016/j.envpol.2019.113809
  • Type: Conference Papers and Presentations Status: Published Year Published: 2020 Citation: Effect of Animal Waste Biochar on Contaminant Removal Malcolm Jackson II and Hao Chen ASA, CSSA and SSSA International Annual Meetings (2020)
  • Type: Conference Papers and Presentations Status: Published Year Published: 2020 Citation: MECHANISM STUDY OF IRON MODIFIED BIOCHAR ON PERSULFATE ACTIVATION AND POLLUTION DEGRADATION Hao Chen and Hem Chandra Sharma ASA, CSSA and SSSA International Annual Meetings (2020)
  • Type: Conference Papers and Presentations Status: Published Year Published: 2020 Citation: Solar Photodegradation of Methylene Blue Dye by Cellulose-TiO2 Biochar Prepared by Sol-gel Method Aquib Mohammed Ayman and Hao Chen ASA, CSSA and SSSA International Annual Meetings (2020)
  • Type: Journal Articles Status: Published Year Published: 2022 Citation: Sharma, H. C., Chen, H., & Chandel, A. K. (2022). Biochar modification with hematite and goethite as efficient persulfate activation catalysts for sulfamethoxazole degradation: one-step biochar synthesis method and solution matrix effect on sulfamethoxazole removal kinetics. Environmental Science and Pollution Research, 1-14.
  • Type: Theses/Dissertations Status: Submitted Year Published: 2022 Citation: SORPTION OF METHYLENE BLUE USING CRAWFISH SHELL-DERIVED BIOCHAR Malcolm Jackson


Progress 02/15/21 to 02/14/22

Outputs
Target Audience:farmers, small producers, local public, external organizations (such as Environmental Protection Agency (EPA), Environment Quality Observatories) and academia. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?We have trained 3 master's students and 2undergrad students through biochar research. How have the results been disseminated to communities of interest?We have presented our work at international, national, and local conferences. What do you plan to do during the next reporting period to accomplish the goals?We are in the writing stage. We plan to have one more publication in the next report circle.

Impacts
What was accomplished under these goals? We have expanded the biochar production from plant-based toanimal-waste-based such as crawfish biochar and chicken feather biochar.A series of experiments were performed to understand the adsorption capacity of crawfish shell-derived biochar. Four different biochar were prepared for this series of experiments: Crawfish Shell-Lignin 800°C, Crawfish Shell-Lignin 600°C, Crawfish Shell-Lignin 400°C, and unmodified Lignin 800°C via pyrolysis. A portion of each biochar was placed into a 50 PPM solution and shaken for 4 hours. The result shows all biochar has excellent sorption capacity with 600 degrees working the best. The iron is also used for biochar modification, after modification, biochar showed an excellent effect on contaminant degradation through oxidation.

Publications

  • Type: Conference Papers and Presentations Status: Accepted Year Published: 2021 Citation: Sorption of Methylene Blue Using Crawfish Shell-Derived Biochar Malcolm Jackson II and Dr. Hao Chen, University of Arkansas at Pine Bluff, AR, 71601 2021 ASA, CSSA & SSSA International Annual Meetings, Salt Lake City
  • Type: Conference Papers and Presentations Status: Accepted Year Published: 2021 Citation: Pollution Control with Nitrogen Doped Biochar Hao Chen and Aneesh Chandel, University of Arkansas at Pine Bluff, AR, 71601 2021 ASA, CSSA & SSSA International Annual Meetings Salt lake CITY
  • Type: Conference Papers and Presentations Status: Accepted Year Published: 2022 Citation: Sorption of Methylene Blue Using Crawfish Shell-Derived Biochar Malcolm Jackson II and Dr. Hao Chen 2021 ARD meeting, Atlanta, GA
  • Type: Conference Papers and Presentations Status: Accepted Year Published: 2022 Citation: Pollution Control with Nitrogen Doped Biochar Hao Chen and Aneesh Chandel, University of Arkansas at Pine Bluff, AR, 71601 2021 ARD meeting, Atlanta, GA
  • Type: Conference Papers and Presentations Status: Accepted Year Published: 2022 Citation: Modified Crawfish Shell Biochar for Persulfate Activation", Sudarshan Basyal and Dr. Hao Chen 2022 ARD meeting


Progress 02/15/20 to 02/14/21

Outputs
Target Audience:The knowledge generated from research involves a wide range of stakeholders, such as scientists, farmers, land managers, advisory services, regulators, educators, students, as well as the general public. Changes/Problems:Due to the pandemic, we have not finished the data processing and manuscript writing partproposed. Will continue to work on these parts. What opportunities for training and professional development has the project provided?We have trained four master students during this period. Two of them graduated in July 2020 and joined Ph.D. program now. Two students are still undergoing the training process as master. How have the results been disseminated to communities of interest?Our results werepresented as seminars in our university and posters at national conferences. What do you plan to do during the next reporting period to accomplish the goals?We plan to write two papers base on the results we have. Also, continue with some biochar characterization since some of the work were interrupted due to pandemic.

Impacts
What was accomplished under these goals? In this period,we continued our research in three parts: 1) biochar synthesis using different types of agriculture waste and under different pyrolysis conditions; 2) biochar characterization with modern instruments, including XRD, XPS, and FTIR, etc. to identify the surface characterization of the biochar; 3) identify the potential of the biochar on removal contaminates through sorption and degradation. For biochar synthesis, our research expanded from plant-based biochar (pine needles and rice husk) to animal waste-based biochar(crawfish shells and chicken feathers) some food waste has also been used. These biochar have unique properties such as catalytic effect and the mechanisms of these effects have not been well understood. We have conducted a series of kinetics experiments to understand the pollutionremoval mechanisms. We have also done optimization studies to maximize pollution removal efficiency. For biochar characterization, we have collaborated with the University of Arkansas at Little Rock Nano Center for instrument analysis. These analyses are extremely useful for understanding the surface morphologies of biochar and benefit biochar design method improvement.

Publications

  • Type: Journal Articles Status: Published Year Published: 2020 Citation: 1 Simms, T., Chen, H. & Mahato, G. Dose-dependent Effect of Biochar as Soil Amendment on Reducing Copper Phytotoxicity and Mobility. Int J Environ Res 14, 751759 (2020). https://doi.org/10.1007/s41742-020-00293-y 2 Zhang, Y., Zheng, Y., Yang, Y., Huang, J., Zimmerman, A. R., Chen, H., Hu, X., and Gao, B. (2021). Mechanisms and adsorption capacities of hydrogen peroxide modified ball milled biochar for the removal of methylene blue from aqueous solutions. Bioresource Technology 337, 125432.
  • Type: Journal Articles Status: Published Year Published: 2020 Citation: 2 Zhang, Y., Zheng, Y., Yang, Y., Huang, J., Zimmerman, A. R., Chen, H., Hu, X., and Gao, B. (2021). Mechanisms and adsorption capacities of hydrogen peroxide modified ball milled biochar for the removal of methylene blue from aqueous solutions. Bioresource Technology 337, 125432.
  • Type: Journal Articles Status: Published Year Published: 2020 Citation: Huang, J., A. R. Zimmerman, H. Chen and B. Gao (2020). "Ball milled biochar effectively removes sulfamethoxazole and sulfapyridine antibiotics from water and wastewater." Environmental Pollution 258: 113809
  • Type: Theses/Dissertations Status: Submitted Year Published: 2020 Citation: Hem Chandra Sharma, BIOCHAR MODIFICATION WITH HEMATITE AND GOETHITE FOR EFFICIENT PERSULFATE ACTIVATION AND POLLUTION DEGRADATION
  • Type: Theses/Dissertations Status: Submitted Year Published: 2020 Citation: Aneesh Kumar Chandel. Nitrogen-Doped Rice Husk Biochar to Activate Persulfate and to Remove Contaminants
  • Type: Conference Papers and Presentations Status: Published Year Published: 2020 Citation: Effect of Animal Waste Biochar on Contaminant Removal. Malcolm Jackson II and Hao Chen;ASA-CSSA-SSSA International Annual conferences
  • Type: Conference Papers and Presentations Status: Published Year Published: 2020 Citation: Mechanism Study of Iron Modified Biochar on Persulfate Activation and Pollution Degradation Hao Chen and Hem Chandra Sharma;ASA-CSSA-SSSA International Annual conferences
  • Type: Conference Papers and Presentations Status: Published Year Published: 2020 Citation: Solar Photodegradation of Methylene Blue Dye by Cellulose-TiO2 Biochar Prepared by Sol-gel Method Aquib Mohammed Ayman and Hao Chen;ASA-CSSA-SSSA International Annual conferences


Progress 02/15/19 to 02/14/20

Outputs
Target Audience:Theknowledge generated from research involves a wide range of stakeholders, such as scientists, farmers, land managers, advisory services,regulators, educators, students, as well as the general public. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided? Nothing Reported How have the results been disseminated to communities of interest?1) Local newspaper introduced our work to the local community: UAPB Scientists Investigate Eco-friendly Solution to Agricultural Waste 2) We also introduced biochar production and application method to farmers in the field day organized by the University of Arkansas at Pine Bluff. What do you plan to do during the next reporting period to accomplish the goals?1? We plan to work on biochar facilitated pollution degradation since we found our biochar can also act as a catalyzer for chemical oxidation. 2? We also plan to use animal waste to make biochar such as chicken feathers and crawfish shells.

Impacts
What was accomplished under these goals? Biochar is a carbon-rich product that is produced by the burning of biomass with a limited supply of oxygen. Biochar is traditionally recognized as a soil amendment to increases soil fertility. Recently, there is a new technology about biochar modification to improve biochar physical and chemical properties. The engineered biochar can serve as a multifunctional agent not only for soil amendment but also for water treatment. This year, we use pine needles and rice husk as typical plant residue to make biochar. In the first project, we tested the effect of pine needle biochar on reducing copper mobility and phytotoxicity (tested in sweet potato). Laboratory column leaching and greenhouse experiments were conducted to understand the effect of biochar derived from sweet potato residue and pine needle on reducing copper (Cu) mobility and phytotoxicity. The results showed that biochar amendment can effectively raise soil pH and decrease water-soluble and exchangeable Cu in the contaminated soils by 64% to 95% in the contaminated soil. Most of the bioavailable Cu was converted into stable fractions such as oxides-bounded Cu. The accumulative Cu in the leachate after 10 leaching events was reduced up to 80%. 50 days greenhouse sweet potato rooting experiment indicated that the presence of biochar can significantly reduce Cu phytotoxicity. However, the quantity of biochar added as a soil amendment has to be optimized to ensure plant health. The second study explored the sorption ability of rice hull and pine needle derived biochar about Ciprofloxacin (CIP) at 100 µg/L and compared with graphene simultaneously. At neutral pH, rice hull biochar and pine needle biochar can remove 100% CIP and 67% CIP respectively. Acidic condition (pH=4) showed no effect on rice hull biochar sorption but increased pine needles biochar sorption ability with 95% CIP removal. At alkaline conditions (pH=9) CIP removal efficiency of rice hulls biochar and pine needle biochar decreased to 74% and 50% respectively. pH effect indicated the chemisorption including electro attraction, H-bonding, and π-π electron donor-acceptor interaction might be the primary CIP removal mechanism. Overall, rice hull biochar showed strong CIP sorption ability with removal efficiency comparable to graphene. Results obtained from this experiment showed that rice hulls biochar could be used as a cost-effective alternative to Graphene to remove CIP from water. In the third project, we engineered pine needle biochar using iron minerals. The magnetic property was introduced into biochar through pyrolysis of a mixture of hematite or goethite mineral and pine needle biomass. The resulting biochar composite was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and energy-dispersive X-ray analysis (EDS). In comparison to the unmodified biochar, the hematite or goethite modified biochar not only had stronger magnetic property but also showed greater pollution removal efficiency, likely because the γ-Fe2O3 particles on the carbon surface served as sorption sites through electrostatic interactions. Absorptive SMX removal at neutral and pH 4 was similar for both magnetic biochar and decreased by 10% in pH 9. However, increasing pH enhanced the activation removal of SMX and lowered by 10 % in pH 4. Findings from this work indicate that hematite or goethite modification can increase the SMX sorption capacity of pine needle biochar and add the magnetic effect to biochar that can benefit further biochar reuse.

Publications

  • Type: Journal Articles Status: Published Year Published: 2019 Citation: Yu, H., Zou, W., Chen, J., Chen, H., Yu, Z., Huang & Gao, B. (2019). Biochar amendment improves crop production in problem soils: A review. Journal of environmental management, 232, 8-21.
  • Type: Journal Articles Status: Published Year Published: 2019 Citation: Zheng, Y., Wang, B., Wester, A.E., Chen, J., He, F., Chen, H. and Gao, B., 2019. Reclaiming phosphorus from secondary treated municipal wastewater with engineered biochar. Chemical Engineering Journal, 362, pp.460-468.
  • Type: Conference Papers and Presentations Status: Other Year Published: 2019 Citation: Engineered Biochar for Pollution Degradation H Chen, H Sharma, A Chandel ASA, CSSA and SSSA International Annual Meetings (2019)
  • Type: Conference Papers and Presentations Status: Other Year Published: 2019 Citation: Activation of Persulfate By N-Doped Rice Husk Biochar for the Removal of Contaminants A Chandel, H Sharma, H Chen ASA, CSSA and SSSA International Annual Meetings (2019)
  • Type: Conference Papers and Presentations Status: Other Year Published: 2019 Citation: Synthesis of magnetic biochar for the adsorptive removal Sulfamethoxazole Hem Chandra Sharma the Association of 1890 Research Directors 19th Biennial Research Symposium
  • Type: Conference Papers and Presentations Status: Other Year Published: 2019 Citation: Ciprofloxacin Removal by Biochar Derived from Rice Hull and Pine Needles Aneesh Chandel and Hao Chen the Association of 1890 Research Directors 19th Biennial Research Symposium
  • Type: Conference Papers and Presentations Status: Other Year Published: 2019 Citation: The Effect of Biochar on Reducing Copper Mobility and Phytotoxicity Tatum Simms, Gena Mahato and Hao Chen the Association of 1890 Research Directors 19th Biennial Research Symposium


Progress 02/15/18 to 02/14/19

Outputs
Target Audience:There are five key audiences for this research, these are: USDA employee, farmers, local public, external organizations (such as Environmental Protection Agency (EPA), Environment Quality Observatories) and academia. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?One underrepresented female student graduated last year under the support of this grant as master students and currently works on pursuing her doctoral degree. Three undergraduate underrepresented students were working on this project as full time summer intern. We also recruited three master students working on biochar engineering to maximize the capacity of biochar for pollution control. We also supported on underrepresented female student master student attend international conferences to present her work and attend workshops. With the close cooperation with University of Florida, we already have two papers accepted in top journal just after one year of start this project and one paper under preparation. One poster list top three in international competition in biochar community. In 2019 we presented two oral presentations and one poster in national conferences; also presented three posters in rural life conferences for local community. Although this project started last year we already show enhancement on UAPB's research and education. We will continue this project to maximize the impact on building research capacity and contribute to sustainable agriculture community. How have the results been disseminated to communities of interest?We have paritclipated and presented 1poster and 2 oral presentationsin academic conferences for professional conmmunication. We also presented 3 posters in local community conferences for educated the farmers and local agency about using biohcar to promote soil quality. What do you plan to do during the next reporting period to accomplish the goals?We will continue further improve biohcar's properties using engineered process. Then biocahr can not only retain pollutions but also promote pollution degradation.

Impacts
What was accomplished under these goals? Through the support of 1890 Capacity Building Grant, University of Arkansas at Pine Bluff (UAPB) has successfully initiated biochar research program to convert agriculture waste to value added produces. With the support of this grant UAPB has built comprehensive lab for biochar research. Local biomass has been successfully converted to biochar. Biochar's effectiveness on retain two antibiotics has been proven. We also conducted biochar engineering process to enhance the physical chemical properties of biochar such as additional surface area; magnetic properties. The effect of biochar on reduce pollution toxicity also been tested in green house experiments by promoting sweet potato growth in a copper contaminated soil.

Publications

  • Type: Theses/Dissertations Status: Awaiting Publication Year Published: 2019 Citation: Reduction of Copper Phytotoxicity and Mobility in Sweetpotato Using Biochar, University of Arkansas at Pine bluff, Master Degree, Tatum Simms
  • Type: Conference Papers and Presentations Status: Other Year Published: 2018 Citation: ASA-CSSA-SSSA International Annual Meeting (Top 3 in the poster competition for the Biochar Community) Reduction of Copper Phytotoxicity and Mobility in Sweetpotato Using Biochar Tatum Simms and Hao Chen
  • Type: Journal Articles Status: Accepted Year Published: 2019 Citation: 1. Zheng, Y., Wang, B., Wester, A.E., Chen, J., He, F., Chen, H. and Gao, B., 2019. Reclaiming phosphorus from secondary treated municipal wastewater with engineered biochar. Chemical Engineering Journal, 362, pp.460-468. 2. Yu, H., Zou, W., Chen, J., Chen, H., Yu, Z., Huang & Gao, B. (2019). Biochar amendment improves crop production in problem soils: A review. Journal of environmental management, 232, 8-21.
  • Type: Conference Papers and Presentations Status: Other Year Published: 2019 Citation: The Effect of Biochar on Reducing Copper Mobility and Phytotoxicity Hao Chen*, Tatum Simms and Gena Mahato,(oral presentation)2019 March ARD meeting Jacksonville FL " Biochar Modification with Metal Oxide Nanoparticle for The Removal Of Water and Soil Pollutant Sulfamethoxazole and Effects Of Solution pH on Sorption Hem Chandra Sharma and Hao Chen poster presentation, 02/2019, rural life conference, pine bluff, AR " The Effect of Biochar on Reducing Copper Mobility and Phytotoxicity Hao Chen*, Tatum Simms and Gena Mahato, poster presentation, 02/2019 rural life conference, pine bluff, AR " Ciprofloxacin Removal by Biochar Derived from Rice Hull and Pine Needles. Aneesh Kumar Chandel, Hem Chandra Sharma, Hao Chen*poster presentation, 02/2019, rural life conference, pine bluff, AR Synthesis of magnetic biochar for the adsorptive removal Sulfamethoxazole Hem Chandra Sharma and Hao Chen,(oral presentation)2019 March ARD meeting Jacksonville FL Effect of Cations on the adsorption of Ciprofloxacin by biochar Aneesh Kumar Chandel*, Hem Chandra Sharma and Hao Chen(poster presentation)2019 March ARD meeting Jacksonville FL