木素对Pb^(2+)吸附类型及脱附性的影响  

Lignin for Pb^(2+) adsorption type and the impact of desorption

作　　者：邓继东[1] 成梓铭[1] 湛明宇 DENG Jidong;CHENG Ziming;ZHAN Mingyu(Shenyang Storage Battery Research Institute, Shenyang Liaoning 110178;Shenyang Siasun Robot Automation Co., Ltd., Shenyang Liaoning 110168, China)

机构地区：[1]沈阳蓄电池研究所,辽宁沈阳110142 [2]沈阳新松机器人自动化股份有限公司,辽宁沈阳110168

出　　处：《蓄电池》2016年第6期287-290,共4页Chinese LABAT Man

摘　　要：本文中,通过改变Pb^(2+)初始浓度的方法,研究了等量木素对Pb^(2+)的吸附性能。根据Langmuir、Freundlich、Temkin、Henry方程模型做吸附等温线,其中按Langmuir吸附模型得到的方程中方差R^2最大,确定木素对Pb^(2+)的吸附符合Langmuir吸附模型,且吸附方式主要以化学吸附为主。通过降低温度、降低pH、缩短时间3种方法考察木素吸附Pb^(2+)后的脱附情况。实验数据表明,通过降低温度的方法无法使被吸附的Pb^(2+)脱附,通过降低pH可以使被木素吸附的Pb^(2+)有效脱附,在低pH的环境下,被吸附的Pb^(2+)在短时间内即可实现大量的脱附。Abstract: By changing the initial concentration of Pb2+, the adsorption capacity of lignin on Pb2+ was studied in this paper. By the adsorption isotherms based on the Langmuir, Freundlich,Temkin, and Henry equation models, the variance R 2 is the largest in the Langmuir adsorption model.Therefore, it was found that the adsorption of lignin on Pb2+ was main chemical adsorption according with the Langmuir adsorption model. Three methods of decreasing temperature, time and pH were usedto investigate desorption after the lignin had absorbed Pb2+. The experimental data showed that theadsorbed Pb2+ couldn’t be desorbed by means of a decrease of temperature, but the adsorbed Pb2+ could be efficiently and heavily desorbed under the environment of low pH in a short time.

关 键 词：木素 LANGMUIR 吸附 脱附 PB2+ 木素磺酸钠 膨胀剂 

分 类 号：TM912.9[电气工程—电力电子与电力传动]