燕山大学学报2016，Vol.40Issue(6)：552-560,9.DOI:10.3969/j.issn.1007-791X.2016.06.012
不同生物质为原料的热解生物炭对Pb2＋的吸附作用
Adsorption properties for Pb2+ removal onto biochars from different sources of biomass feedstock
摘要
Abstract
The adsorption ability of biochars BCs towards contaminants depends on its physicochemical property which is associat⁃ed with the raw materials.In this paper biochars were prepared by pyrolysis carbonization from three feedstock sources of Fraxinus mandshurica sawdust FM Peanut shell PS and Cow dung CM .The biomass was pyrolyzed at 400 ℃ for 4 h.The yielded ash content and element composition and surface functional groups of the obtained biochars were measured.The products were character⁃ized by X⁃ray diffraction XRD Fourier transform infrared spectroscopy FTIR and field emission scanning electron microscope FESEM . The adsorption properties for Pb2+ were investigated. The adsorption kinetics and isotherm of Pb2+ on the modified biochars at 298 K and pH 5.5 were analyzed by the pseudo⁃second order model and Langmuir model.The maximum lead adsorption capacities were 11.99 31.9 and 181.82 mg·g-1 for FM⁃BC、PS⁃BC and CM⁃BC giving the order of the adsorption capacity CM⁃BC>PS⁃BC>FM⁃BC.The corresponding adsorption rate constants were 0.001 37 0.000 78 and 0.068 g·mg-1� min-1 suggesting the order of CM⁃BC>FM⁃BC>PS⁃BC.The result indicates that the sources of the biomass feedstock are of significance.关键词
生物炭/吸附/铅离子/生物质种类Key words
biochar/adsorption/lead ion/biomass type分类
资源环境引用本文复制引用
杜霞,赵明静,马子川,邢胜涛..不同生物质为原料的热解生物炭对Pb2＋的吸附作用[J].燕山大学学报,2016,40(6):552-560,9.基金项目
河北省教育厅重点项目（ ZD20131005）；河北省研究生创新资助项目 （）
