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当前位置: 首页 > 文章 > 生物炭对Cu~(2+)的吸附特性及其影响因素 安徽农业科学 2014 (5) 1467-1470
Position: Home > Articles > Cu~(2+) Adsorption Characteristic of Biochar and Its Influential Factor Journal of Anhui Agricultural Sciences 2014 (5) 1467-1470

生物炭对Cu~(2+)的吸附特性及其影响因素

作  者：
唐行灿;陈金林;李文庆
单  位：
山东农业大学资源与环境学院;南京林业大学森林资源与环境学院
关键词：
玉米秸;生物炭;热解温度;铜吸附;影响因素
摘  要：
[目的]研究生物炭对溶液中Cu2+的吸附特性及其影响因素。[方法]采用玉米秸在不同温度(200、350、700℃)下制备的生物炭(BC200、BC350、BC700)吸附Cu2+,探讨在不同初始浓度、吸附时间、pH、Zn2+强度条件下对Cu2+的吸附特性。[结果]随着热解温度的升高,生物炭的pH和灰分含量增加。BC350具有最大的CEC和有机碳含量。3种生物炭对Cu2+的吸附能力大小为:BC350>BC700>BC200;拟合得到的BC200、BC350、BC700的最大吸附量分别为17.1、30.6、27.2 mg/g。可以用准一级动力学模型较好地描述吸附动力学结果,BC200、BC350、BC700拟合得到的平衡吸附量与实测值接近。生物炭的铜吸附量随着溶液初始pH的增加而增大;较高的陪伴Zn2+浓度可以显著降低生物炭对Cu2+的吸附。[结论]该研究可为生物炭在环境科学中合理应用提供科学依据。
译  名：
Cu~(2+) Adsorption Characteristic of Biochar and Its Influential Factor
作  者：
TANG Xing-can;CHEN Jin-lin;College of Forest Resources and Environment,Nanjing Forestry University;
关键词：
Corn straw;;Biochar;;Pyrolysis temperature;;Cu2 +adsorption;;Influential factor
摘  要：
[Objective] The research aimed to study the adsorption characteristic of biochar on Cu2 +and its influential factor.[Method]Corn straw was carbonized at varying temperature( 200,350,700 ℃) to prepare three types of biochar( BC200,BC350,BC700). The effects of initial Cu2 +concentration,contact time,pH,ionic strength of Zn2 +on the removal of Cu2 +by biochar were investigated.[Result]The results showed that pH and ash content of biochar gradually increased with increasing pyrolysis temperature. Compared with BC200 and BC700,B350 had the largest CEC and organic carbon content. Cu2 +adsorption capacity of biochar followed the order: BC350 > BC700 > BC200. The maximum sorption capacity of BC200,BC350,and B700 obtained by nonlinear fitting were 17. 1,30. 6,27. 2 mg / g. Adsorption kinetic curve fitted well with pseudo-first-order kinetic equation,and the equilibrium absorption capacity of BC200,BC350,and BC700 were 10. 3,23. 2, 18. 1 mg / g,which were similar to the measured adsorption capacity. Cu2 +adsorption by biochar increased with increasing solution pH. Cu2 + adsorption capacity of biochar decreased significantly when ionic strength of Zn2 +was at a high level. [Conclusion] This research could offer scientific basis for reasonable application of biochar in environmental science.

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