农业环境科学学报2017，Vol.36Issue(10)：2092-2098,7.DOI:10.11654/jaes.2017-0525
纳米羟基磷灰石改性生物炭对铜的吸附性能研究
Comparison of copper adsorption onto unmodified and nano-hydroxyapatite-modified wheat straw biochar
摘要
Abstract
To improve wheat straw biochar's removal ability of copper from polluted water and soils,wheat straw biochar was modified using nano-hydroxyapatite.The characteristics of unmodified and nano-hydroxyapatite-modified wheat straw biochars were analyzed,and batch and kinetic adsorption experiments were conducted.The results showed that the nano-hydroxyapatite coating was uniformly attached to the surface and improved the thermal stability of the wheat straw biochar.All three concentrations of the nano-hydroxyapatite coating decreased the hydrophobicity of the biochar.The nano-hydroxyapatite coating increased the adsorption rate of copper by 7.69％～130.77％.The maximum adsorption capacity of nano-hydroxyapatite-modified wheat straw biochar increased from 32.65 mg· g-1 without coating to 57.01 mg· g-1 with 0.5％ coating.Copper adsorption onto unmodified and nano-hydroxyapatite-modified wheat straw biochars were well fitted by the pseudo-second-order kinetics and Langmuir adsorption models.关键词
纳米羟基磷灰石/小麦秸秆/生物炭/Cu2+/吸附Key words
nano-hydroxyapatite/wheat straw/biochar/Cu2+/adsorption分类
资源环境引用本文复制引用
朱司航,赵晶晶,楚龙港,尹英杰,陈冲,商建英..纳米羟基磷灰石改性生物炭对铜的吸附性能研究[J].农业环境科学学报,2017,36(10):2092-2098,7.基金项目
国家自然科学基金项目(41501232) （41501232）
国家级创新训练项目(201710019065)The National Natural Science Foundation of China(41501232) （201710019065）
National Innovation Training Program,China(201710019065) （201710019065）
