文献类型：期刊文献

英文题名：Recycling application of waste long-root Eichhornia crassipes in the heavy metal removal using oxidized biochar derived as adsorbents

作者：Lin, Sen[1,2];Huang, Weiwei[3];Yang, Hongjun[4];Sun, Shuying[1,2];Yu, Jianguo[1,2]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[3]Hainan Univ, Coll Ecol & Environm, Haikou 570228, Hainan, Peoples R China;[4]Yunnan Res Inst Ecol Agr, Kunming 610203, Yunnan, Peoples R China

年份：2020

卷号：314

外文期刊名：BIORESOURCE TECHNOLOGY

收录：;EI(收录号：20202708898784);WOS:【SCI-EXPANDED(收录号:WOS:000558601200003)】；

基金：This work was sponsored by National Natural Science Foundation of China (21978094, 51704121).

语种：英文

外文关键词：Long-root Eichhornia crassipes; Oxidized biochar; Adsorption; Heavy metal; Recycling application

摘要：An oxidized biochar was prepared using long-root Eichhornia crassipes through an aerobic/anaerobic hybrid calcination to recycle its waste plants after eutrophic treatments. The adsorption performances of the biochar were investigated and the results showed that the adsorption equilibrium could arrive in 30 min and the adsorption capacities for Pb2+, Cu2+, Cd2+ and Zn2+ at 30 degrees C were 0.57, 0.41, 0.44 and 0.48 mmol/g, respectively. The adsorption could be promoted at higher pH and temperature and the adsorption tolerance for different heavy metal ions to the existence of competing ions and organic matters was hierarchical. The adsorption was deduced to be heterozygous courses and mainly controlled by complexation of oxygen-containing groups with these heavy metal ions. It was confirmed that the biochar could be regenerated with HCl solution and the adsorption performance kept consistent in 10 adsorption-desorption cycles.