一种新生物质吸附去除水体中直接大红  

Adsorption of Direct Scarlet by a novel biosorbent

作　　者：苗光健[1] 周迟骏[1] 

机构地区：[1]南京工业大学环境学院,江苏南京210009

出　　处：《浙江工业大学学报》2010年第2期145-148,196,共5页Journal of Zhejiang University of Technology

摘　　要：法国梧桐球果制备生物吸附剂,研究了其对水体中直接大红的吸附作用,研究结果表明法国梧桐球果能有效的吸附水体中的直接大红.通过不同影响因素下(pH、吸附剂量和温度)的吸附试验,确定了试验的最佳条件,并且得出了吸附平衡和动力学参数.25℃时吸附经7 h接近平衡,并且随着温度升高吸附接近平衡的时间明显缩短,35℃和45℃时分别为3 h和2 h.试验结果显示吸附过程符合一级和二级动力学吸附模型,二级吸附方程的数据拟合优于一级吸附方程,由动力学常数可求得吸附过程的表观活化能Ea=536.7 kJ/mol.吸附等温线的研究表明直接大红吸附符合Langmuir和Freundlich吸附等温方程,由Langmuir吸附等温方程可求得直接大红的最大吸附量为66.23 mg/g.In the present work, cone biomass of chinar was utilized as a novel biosorbent to remove the Direct Scarlet from water. The results show that the the cone biomass of chinar is an effective biosorbent for the removal of direct dyes from water. The optimal experimental conditions were established by various experiments （e. g. initial pH, biosorbent dosage, and temperature） and the equilibrium and kinetic parameters were also carried out. The equilibrium was approached within 7 h at 25 ℃ and the time decreased sharply as the temperature increased, 3 h at 35 ℃ and 2 h at 45 ℃. The kinetic studies indicated that pseudo first Order and pseudo second order rate equations were both favorable and the latter seems more suitable. The apparent activation energy Eo calculated from kinetic parameters was 536. 7 kJ/mol. Isotherm studies indicated that adsorption of Direct Scarlet on cone biomass of chinar conformed to the Langmuir and Freundlich models. The maximum adsorption capacity （qmax） for taking up Direct Scarlet obtained from the Langmuir equation was 66.23 mg/g.

关 键 词：法国梧桐球果 吸附 等温线 动力学 

分 类 号：X703.1[环境科学与工程—环境工程]