文献类型：期刊文献

英文题名：Micro-nano-engineered nitrogenous bone biochar developed with a ball-milling technique for high-efficiency removal of aquatic Cd(II), Cu(II) and Pb(II)

作者：Xiao, Jiang[1] Hu, Rui[2] Chen, Guangcai[1]

第一作者：肖江

通信作者：Chen, GC[1];Hu, R[2]|[a000551c9abd7c3960d59]陈光才;

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China;[2]Chinese Acad Sci, Hefei Inst Phys Sci, Inst Appl Technol, Hefei 230088, Peoples R China

年份：2020

卷号：387

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20200207990561);Scopus(收录号：2-s2.0-85077441423);WOS:【SCI-EXPANDED(收录号:WOS:000514758500020)】；

基金：The work was supported by the Key Research and Development Program of Zhejiang Province (2018C03047), and the China Postdoctoral Science Foundation (2018M640200, 2019T120154). The authors also gratefully acknowledge partially financial support from the CAS Pioneer Hundred Talents Program, the CASHIPS Director's Fund (Grant No. YZJJ2018QN20) and the National Natural Science Foundation of China (No. 21875257).

语种：英文

外文关键词：Engineered bone biochar; Ball-milling; Heavy metals; Adsorption; Complexing mechanism

摘要：A cost-effective and eco-friendly engineering method to improve biochar's physicochemical and sorption performance is critical in various environmental applications. In this study, micro-nano-engineered nitrogenous biochars derived from cow bone meal pyrolyzed at different temperatures and were engineered with the assistance of a ball-milling technique. The ball-milled bone biochars were natural composites combined with plant biochars and hydroxyapatite components on the micro-nanoscale. Both the micropore area and the external specific surface area of the bone biochars were significantly improved after ball-milling. The sorption capacities for heavy metal ions were heavy metal ions were MBC-600 > MBC-450 > BC-600 > MBC-300 > BC-450 > BC-300, consistent with the variation tendency in the specific surface areas of the bone biochars. The adsorption capacities of MBC-600 for Cd(II), Cu(II) and Pb(II) were 165.77, 287.58 and 558.88 mg/g, respectively (T 298K, pH 5.0), representing increases of 93.91.%, 75.56% and 64.61% compared with the un-milled preparation. Surface complexation, cation exchange, chemical precipitation, electrostatic interaction and cation-n bonding were responsible for the removal of heavy metal ions by bone biochar materials. Taken together, the results show that micro-nano-engineered nitrogenous bone biochar prepared using ball-milling technology is a promising material for the remediation of heavy metals-bearing aquatic environments.