%0 Journal Article
%T Adsorption Properties of 2,4-Dihydroxybenzoic Acid on Three Anion Exchange Resins<br>2,4-二羟基苯甲酸在3种树脂上的吸附特性
%A XIE Zu-fang
%A LIU Guo-chao
%A TONG Zhang-fa
%A <br>谢祖芳
%A 刘国超
%A 童张法
%J 过程工程学报
%D 2012
%I 
%X The adsorption properties of 2,4-dihydroxybenzoic acid by 717(gel-type,strong base),D201(macroporous-type,strong base) and D301R(macroporous-type,weak base) resins were studied through static and dynamic experiments.The results show that the maximum adsorption ability of 717 and D201 resins occurs at pH=4～11,and D301R resin at pH=3～9.At pH=5,293～313 K and initial concentration of 2,4-dihydroxybenzoic acid of 0.6488～6.488 mmol/L,the adsorption isotherms of 2,4-dihydroxybenzoic acid on D301R,717 and D201 resins obey Freundlich model,and their maximum equilibrium adsorption capacity is 2.98,2.66 and 2.54 mmol/g,respectively(the adsorption has not reached saturation yet).The adsorptions are physical and spontaneous,exothermal processes.Pseudo first-order and pseudo second-order models were applied to correlate the kinetic experimental data.The former was more accordant with the experimental data than the latter.The 2,4-dihydroxybenzoic acid adsorbed on the three resins could be eluted by 100 mL 5%(ω) NaCl+2%(ω) NaOH solution quickly with elution rate reaching 99%.The adsorption performance of 2,4-dihydroxybenzoic acid on D301R resin was better than on that on D201 and 717 resins under the same conditions.
%K 2
%K 4-dihydroxybenzoic acid
%K anion exchange resin
%K adsorption
%K thermodynamics
%K kinetics<br>2
%K 4-二羟基苯甲酸
%K 阴离子交换树脂
%K 吸附
%K 热力学
%K 动力学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=3FCF8B1A330466D5&jid=B9EE12934D19905403D996AE65CEEEED&aid=28538CA98C3000787B051D838B625583&yid=99E9153A83D4CB11&vid=59906B3B2830C2C5&iid=CA4FD0336C81A37A&sid=B91E8C6D6FE990DB&eid=340AC2BF8E7AB4FD&journal_id=1009-606X&journal_name=过程工程学报&referenced_num=0&reference_num=0