再力花残体活性炭的制备及对结晶紫的吸附

应用生态学报

再力花残体活性炭的制备及对结晶紫的吸附

褚淑祎^1，2,杨敏²,肖继波²,张骏²,朱燕萍²,严向军^3**,田光明¹

（¹浙江大学环境与资源学院，杭州 310058； ^2浙江农林大学环境与资源学院, 浙江临安 311300； ^3杭州市市区河道监管中心, 杭州 310008）

出版日期:2013-06-18 发布日期:2013-06-18

Active carbon from Thalia dealbata residues: Its preparation and adsorption performance to crystal violet.

CHU Shu-yi^1，2, YANG Min², XIAO Ji-bo², ZHANG Jun², ZHU Yan-ping²,YAN Xiang-jun³， TIAN Guang-ming¹

(¹College of Environmental Science and Resources, Zhejiang University, Hangzhou 310058, China;
²School of Environment and Resource, Zhejiang Agriculture and Forestry University, Lin’an 311300, Zhejiang, China; ³Hangzhou Urban River Supervision Centre, Hangzhou 310008, Zhejiang, China)

Online:2013-06-18 Published:2013-06-18

摘要/Abstract

摘要：

以多年生水生植物再力花残体为原料,磷酸为活化剂制备活性炭,其BET比表面积达1174.13 m²·g^-1,微孔面积为426.99 m²·g^-1,平均孔径为3.23 nm.考察了不同pH、结晶紫初始浓度、吸附时间和吸附温度下,活性炭对结晶紫的吸附性能.结果表明: 吸附量基本不随pH变化;吸附过程主要分为快速吸附和慢速吸附2个阶段,符合伪二级动力学方程;在温度为293、303、313 K条件下,吸附过程更符合Langmuir等温吸附方程,最大吸附量分别为409.83、425.53和438.59 mg·g^-1,且吸附是一个熵增的自发吸热过程.

Abstract: By using phosphoric acid as activation agent, active carbon was prepared from Thalia dealbata residues. The BET specific surface area of the active carbon was 1174.13 m²·g^-1, micropore area was 426.99 m²·g^-1, and average pore diameter was 3.23 nm. An investigation was made on the adsorption performances of the active carbon for crystal violet from aqueous solution under various conditions of pH, initial concentration of crystal violet, contact time, and contact temperature. It was shown that the adsorbed amount of crystal violet was less affected by solution pH, and the adsorption process could be divided into two stages, i.e., fast adsorption and slow adsorption, which followed the pseudosecondorder kinetics model. At the temperature 293, 303, and 313 K, the adsorption process was more accordance with Langmuir isotherm model, and the maximum adsorption capacity was 409.83, 425.53, and 438.59 mg·g^-1, respectively. In addition, the adsorption process was spontaneous and endothermic, and the randomness of crystal violet molecules increased.

褚淑祎1，2,杨敏2,肖继波2,张骏2,朱燕萍2,严向军3**,田光明1. 再力花残体活性炭的制备及对结晶紫的吸附[J]. 应用生态学报.

CHU Shu-yi1，2, YANG Min2, XIAO Ji-bo2, ZHANG Jun2, ZHU Yan-ping2,YAN Xiang-jun3， TIAN Guang-ming1 . Active carbon from Thalia dealbata residues: Its preparation and adsorption performance to crystal violet.[J]. Chinese Journal of Applied Ecology.