摘要
利用热带地区椰壳为原材料在3个温度下制备生物炭(分别标记为B450、B550和B650),通过静态吸附实验研究其对水中Cr(Ⅵ)的等温吸附和吸附动力学特性。结果表明:相同条件下,B650对水中Cr(Ⅵ)的吸附量最大;3种生物炭对水中Cr(Ⅵ)的等温吸附曲线均能较好的用Langmuir方程和Freundlich方程进行拟合,且B650对Cr(Ⅵ)的吸附能力最强,其次为B550、B450;准二级动力模型能很好描述3种生物炭对水中Cr(Ⅵ)的吸附过程(r^2>0.99),说明其吸附机制主要是表面化学吸附。
The preparation of biochar at three temperatures was studied using coconut shells in tropical areas as raw materials, marked respectively as B450, B550 and B650. The isothermal adsorption characteristics anwere discussedby static adsorption test. The research showed that the adsorption capacity of B6der the same conditions. The isothermal adsorption curves of 3 kinds of biochar for Cr （ Ⅵ） in water can beequation and Freundlich equation. Among them, B650 possessed the strongest adsorption capacity for Cr （Vand B450. The quasi t-wo order kinetic equationcan well describe the adsorption process of Cr （Ⅵ） in water by 3 kinds of biochar（r2 〉 0. 99）,which explained that the adsorption mechanism was mainly surface chemisorption.
出处
《环境科学与管理》
CAS
2017年第12期66-69,共4页
Environmental Science and Management
基金
国家自然科学基金资助项目(81660356)
海南省教育厅高等学校科学研究项目(Hnky2016-28)
海南医学院科研培育基金(HY2012-015)
海南医学院大学生创新性实验计划项目(HYCX2015004)
国家级大学生创新创业训练项目(201611810053)
关键词
椰壳
生物炭
Cr(Ⅵ)吸附机制
coconut shell
biochar
Cr （Ⅵ）
adsorption mechanism
