caa a22 4500 606199942 CHVBK 20210128100941.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10653-015-9709-9 doi (NATIONALLICENCE)springer-10.1007/s10653-015-9709-9 Evaluation of phosphorus adsorption capacity of sesame straw biochar on aqueous solution: influence of activation methods and pyrolysis temperatures [Elektronische Daten] [J. Park, Y. Ok, S. Kim, J. Cho, J. Heo, R. Delaune, D. Seo] The phosphorus (P) adsorption characteristic of sesame straw biochar prepared with different activation agents and pyrolysis temperatures was evaluated. Between 0.109 and 0.300mgL−1 in the form of inorganic phosphate was released from raw sesame straw biochar in the first 1h. The release of phosphate was significantly enhanced from 62.6 to 168.2mgg−1 as the pyrolysis temperature increased. Therefore, sesame straw biochar cannot be used as an adsorbent for P removal without change in the physicochemical characteristics. To increase the P adsorption of biochar in aqueous solution, various activation agents and pyrolysis temperatures were applied. The amount of P adsorbed from aqueous solution by biochar activated using different activation agents appeared in the order ZnCl2 (9.675mgg−1)>MgO (8.669mgg−1)⋙0.1N-HCl>0.1N-H2SO4>K2SO4≥KOH≥0.1N-H3PO4, showing ZnCl2 to be the optimum activation agent. Higher P was adsorbed by the biochar activated using ZnCl2 under different pyrolysis temperatures in the order 600°C>500°C>400°C>300°C. Finally, the amount of adsorbed P by activated biochar at different ratios of biochar to ZnCl2 appeared in the order 1:3≒1:1>3:1. As a result, the optimum ratio of biochar to ZnCl2 and pyrolysis temperature were found to be 1:1 and 600°C for P adsorption, respectively. The maximum P adsorption capacity by activated biochar using ZnCl2 (15,460mgkg−1) was higher than that of typical biochar, as determined by the Langmuir adsorption isotherm. Therefore, the ZnCl2 activation of sesame straw biochar was suitable for the preparation of activated biochar for P adsorption. Springer Science+Business Media Dordrecht, 2015 Phosphorus adsorption nationallicence Sesame straw biochar nationallicence Activated biochar nationallicence Pyrolysis temperature nationallicence Langmuir model nationallicence Freundlich model nationallicence Park J. Divison of Applied Life Science (BK21 Program), Institute of Agriculture and Life Science, Gyeongsang National University, 660-701, Jinju, Republic of Korea aut Ok Y. Korea Biochar Research Center, Department of Biological Environment, Kangwon National University, 200-701, Chuncheon, Republic of Korea aut Kim S. Divison of Applied Life Science (BK21 Program), Institute of Agriculture and Life Science, Gyeongsang National University, 660-701, Jinju, Republic of Korea aut Cho J. Department of Bio-Environmental Sciences, Sunchon National University, 540-950, Suncheon, Republic of Korea aut Heo J. Divison of Applied Life Science (BK21 Program), Institute of Agriculture and Life Science, Gyeongsang National University, 660-701, Jinju, Republic of Korea aut Delaune R. Department of Oceanography and Costal Sciences, School of the Coast and Environment, Louisiana State University, 70803, Baton Rouge, LA, USA aut Seo D. Department of Bio-Environmental Sciences, Sunchon National University, 540-950, Suncheon, Republic of Korea aut Environmental Geochemistry and Health Springer Netherlands 37/6(2015-12-01), 969-983 0269-4042 37:6<969 2015 37 10653 https://doi.org/10.1007/s10653-015-9709-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10653-015-9709-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Park J. Divison of Applied Life Science (BK21 Program), Institute of Agriculture and Life Science, Gyeongsang National University, 660-701, Jinju, Republic of Korea aut NATIONALLICENCE 700 1- Ok Y. Korea Biochar Research Center, Department of Biological Environment, Kangwon National University, 200-701, Chuncheon, Republic of Korea aut NATIONALLICENCE 700 1- Kim S. Divison of Applied Life Science (BK21 Program), Institute of Agriculture and Life Science, Gyeongsang National University, 660-701, Jinju, Republic of Korea aut NATIONALLICENCE 700 1- Cho J. Department of Bio-Environmental Sciences, Sunchon National University, 540-950, Suncheon, Republic of Korea aut NATIONALLICENCE 700 1- Heo J. Divison of Applied Life Science (BK21 Program), Institute of Agriculture and Life Science, Gyeongsang National University, 660-701, Jinju, Republic of Korea aut NATIONALLICENCE 700 1- Delaune R. Department of Oceanography and Costal Sciences, School of the Coast and Environment, Louisiana State University, 70803, Baton Rouge, LA, USA aut NATIONALLICENCE 700 1- Seo D. Department of Bio-Environmental Sciences, Sunchon National University, 540-950, Suncheon, Republic of Korea aut NATIONALLICENCE 773 0- Environmental Geochemistry and Health Springer Netherlands 37/6(2015-12-01), 969-983 0269-4042 37:6<969 2015 37 10653