利用氧化生物炭作为吸附剂，从废弃长根凤眼蓝中回收重金属去除应用。
Recycling application of waste long-root Eichhornia crassipes in the heavy metal removal using oxidized biochar derived as adsorbents.
机构信息
National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai 200237, China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
College of Ecology and Environment, Hainan University, Haikou 570228, China.
出版信息
Bioresour Technol. 2020 Oct;314:123749. doi: 10.1016/j.biortech.2020.123749. Epub 2020 Jun 27.
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 Pb, Cu, Cd and Zn at 30 °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.
采用好氧/厌氧混合煅烧法，以长根凤眼莲为原料制备了一种氧化生物炭，以回收富营养化处理后的废弃植物。考察了生物炭的吸附性能，结果表明，吸附平衡可在 30 min 内达到，30°C 下对 Pb、Cu、Cd 和 Zn 的吸附容量分别为 0.57、0.41、0.44 和 0.48 mmol/g。吸附在较高 pH 值和温度下得到促进，对不同重金属离子的吸附耐受程度对共存离子和有机物的存在具有等级顺序。吸附被推断为杂合过程，主要由含氧基团与这些重金属离子的络合控制。研究证实，生物炭可以用 HCl 溶液再生，在 10 次吸附-解吸循环中，吸附性能保持一致。
Zotero 插件