%0 Journal Article
%T Adsorption behavior of copper ion and methylene blue on citric acid-esterified wheat straw.<br>铜离子和亚甲蓝在柠檬酸酯化麦草上的吸附行为
%A SUN Jin
%A ZHONG Ke-ding
%A FENG Min
%A LIU Xing-yan
%A GONG Ren-min
%A <br>孙进
%J 应用生态学报
%D 2008
%I 
%X A cationic adsorbent with carboxyl groups derived from citric acid- esterified wheat straw (EWS) was prepared by the method of solid phase preparation, and a batch experiment was conducted to study the adsorption behaviors of Cu (II) and methylene blue (MB) in aqueous solution on the EWS under conditions of different initial pH, adsorbent dosage, adsorbate concentration, and contact time. The results showed that the maximum adsorption of Cu (II) and MB was obtained when the initial solution pH was > or = 4.0. 96% of Cu (II) in 100 mg x L(-1) Cu solution and 99% of MB in 250 mg x L(-1) dye solution could be removed by > or = 2.0 g x L(-1) of EWS. The adsorption of Cu (II) and MB fitted the Langmuir sorption isothermal model. The maximum removal capacity (Qm) of EWS was 79.37 mg x g(-1) for Cu (II) and 312.50 mg x g(-1) for MB, and the adsorption equilibrium of Cu (II) and MB was reached within 75 min and 5 h, respectively. The adsorption processes of Cu (II) and MB could be described by pseudo-first order and pseudo-second order kinetic functions, respectively.
%K 吸附
%K 铜离子
%K 亚甲蓝
%K 酯化麦草
%K 铜离子
%K 亚甲蓝
%K 柠檬酸
%K 酯化
%K 麦草
%K 吸附行为
%K wheat
%K straw
%K methylene
%K blue
%K copper
%K ion
%K behavior
%K 吸附过程
%K 描述
%K 可分
%K 力学方程
%K 二级反应
%K 吸附时间
%K 吸附平衡
%K 吸附能力
%K 等温模型
%K Langmuir
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=A55491AD4262AAC314447983DE94371E&yid=67289AFF6305E306&vid=2A8D03AD8076A2E3&iid=38B194292C032A66&sid=E4BEEBB9A80BC67E&eid=E934BC2766053B28&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=0&reference_num=25