Kinetic and Thermodynamic Studies of Acid Scarlet 3R Adsorption onto Low-cost Adsorbent Developed from Sludge and Straw  

污泥和秸秆廉价吸附剂对酸性大红3R的吸附动力学和热力学研究(英文)

作　　者：任晓莉 杨玲敏 刘敏 

机构地区：[1]Department of Environmental and Safety Engineering,Taiyuan Institute of Technology

出　　处：《Chinese Journal of Chemical Engineering》2014年第2期208-213,共6页中国化学工程学报（英文版）

基　　金：Supported by the Shanxi Science and Technology Agency Research Project(20100321085);the Scientific Research Foun-dation of the Shanxi Education Department(20111029)

摘　　要：A low-cost adsorbent was prepared from sludge and straw by pyrolysis in a dried state with the surface area of the adsorbent of 829.49 ma. g-l, micropore volume of 0.176 cm2·g-1 and average pore radius of 5.0 nm. The kinetic, equilibrium isotherm and thermodynamic characteristics of trisodium 1-（1-naphthylazo）-2-hydroxynaphthalene- 4＇,6,8-trisulphonate （acid scarlet 3R） onto the adsorbent from sludge and straw were investigated. The results indicated that the pseudo second order adsorption was the predominant adsorption mechanism of acid scarlet 3R. Thus, the adsorption phenomenon was suggested as a chemical process. The adsorption data were fitted better with Langmuir model than Freundlich model, indicating that the adsorption of acid scarlet 3R belonged to the monolayer adsorption and mainly occurred in micropores.A low-cost adsorbent was prepared from sludge and straw by pyrolysis in a dried state with the surface area of the adsorbent of 829.49 m2·g?1,micropore volume of 0.176 cm2·g?1 and average pore radius of 5.0 nm.The kinetic,equilibrium isotherm and thermodynamic characteristics of trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4′,6,8-trisulphonate(acid scarlet 3R)onto the adsorbent from sludge and straw were investigated.The results indicated that the pseudo second order adsorption was the predominant adsorption mechanism of acid scarlet 3R.Thus,the adsorption phenomenon was suggested as a chemical process.The adsorption data were fitted better with Langmuir model than Freundlich model,indicating that the adsorption of acid scarlet 3R belonged to the monolayer adsorption and mainly occurred in micropores.

关 键 词：KINETIC THERMODYNAMIC acid scarlet 3R ADSORBENT SLUDGE STRAW 

分 类 号：X703[环境科学与工程—环境工程] X791