生态环境学报2016，Vol.25Issue(3)：523-530,8.DOI:10.16258/j.cnki.1674-5906.2016.03.023
花生壳和松木屑制备的生物炭对Cu2+的吸附研究
Study on the Adsorption of Cu2+ to Biochars Produced from Peanut Shells and Pine Chips
摘要
Abstract
Abstrcat: Biochar is a carbonous material, and has attracted great research attention. In this study, eight biochars from Peanut shell and pine chip prepared at 200~500℃ by oxygen-limited pyrolysis, and characterized for their elemental composition, functional groups, surface area, surface morphology and sorption properties with Cu2+. The results showed that with the increase of pyrolysis temperature, ash, pH, BET increased, and the degree of aromatic enhancement. The adsorption of Cu2+ on biochars can be divided into in two stages: fast and slow adsorption. The fractions of fast and slow adsorption were dependent on the content of oxygen-containing functional group and the mineral components. Fast sorption compartment was attributed to the direct adsorption of Cu2+ on surface acidic functional groups of biochars, and slow sorption compartment was resulted from the adsorption of Cu2+ on biochar through particle diffusion. FM model is more suitable for fitting the adsorption of Cu2+on biochars, and the nonlinear index (n) values between 0.23~0.67and decreased with increasing pyrolysis temperature. In addition,following 500℃, the adsorption capacity of Cu2+ on PS biochars decreased with the increase of pyrolysis temperature, but sudden increase the adsorption capacity of Cu2+ at 500℃. The adsorption capacity of Cu2 + on PC biochars was no obvious regularity with the increase of pyrolysis temperature. PS5 have the optimum adsorption performance of Cu2+ on PS biochars, and PC2 have the optimum adsorption performance of Cu2+ on PC biochars.关键词
生物炭/Cu2+/吸附作用Key words
biochar/Cu2+/adsorption分类
资源环境引用本文复制引用
周丹丹,吴文卫,赵婧,储刚,梁妮,吴敏..花生壳和松木屑制备的生物炭对Cu2+的吸附研究[J].生态环境学报,2016,25(3):523-530,8.基金项目
国家自然科学青年基金项目 （）
