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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:

第46卷

期数:

2018年第13期

页码:

255-259

栏目:

资源与环境

出版日期:

2018-07-05

文章信息/Info

Title:

Adsorptive properties of γ-polyglutamic acid hydrogel to heavy metal Cd(Ⅱ) and Pb(Ⅱ)

作者:

朱学亮;  罗文亚;  李光;  陈双喜

河南大学生命科学学院微生物工程研究所，河南开封 475004

Author(s):

Zhu Xueliang; et al

关键词:

γ-聚谷氨酸; 水凝胶; 电感耦合等离子体发射光谱仪; 重金属; 吸附

Keywords:

-

分类号:

X703

DOI:

-

文献标志码:

A

摘要:

以γ-聚谷氨酸(γ-PGA)为原料，乙二醇缩水甘油醚为交联剂，采用溶液聚合法合成了新型γ-PGA水凝胶重金属吸附剂(γ-PGA-GDE)，并研究γ-聚谷氨酸水凝胶对Cd²⁺、Pb²⁺的吸附特性。采用傅里叶红外光谱及扫描电镜对吸附材料进行表征，同时研究pH值、温度、吸附时间和重金属离子初始浓度对γ-聚谷氨酸水凝胶吸附特性的影响。结果表明，pH值为5利于γ-聚谷氨酸水凝胶对重金属离子的吸附，温度对其吸附重金属离子影响不大。γ-聚谷氨酸水凝胶对Cd²⁺、Pb²⁺重金属离子的吸附速率非常快，符合准二级动力学方程。其对重金属的吸附符合langmuir等温式，对Pb²⁺、Cd²⁺饱和吸附量分别为526.22、255.54 mg/g，与试验值非常接近。γ-聚谷氨酸水凝胶经盐酸洗脱可再生，再生后可循环使用至少6次。

Abstract:

-

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相似文献/References:

[1]罗晓辉,唐旺全,邱孟斌.添加不同组合生物菌、γ-聚谷氨酸、腐殖酸的新型肥料在小麦生产上的应用[J].江苏农业科学,2014,42(12):96.
　Luo Xiaohui,et al.Application of new fertilizer adding different combinations of biological bacteria，poly(γ-glutamic acid) and humic acid in production of wheat[J].Jiangsu Agricultural Sciences,2014,42(13):96.
[2]李恩,白雪,冉茂双,等.γ-聚谷氨酸发酵过程中体积氧传递系数的控制[J].江苏农业科学,2017,45(17):286.
　Li En,et al.Control of volumetric oxygen transfer coefficient in process of poly γ-glutamic acid fermentation[J].Jiangsu Agricultural Sciences,2017,45(13):286.

备注/Memo

备注/Memo:

收稿日期：2017-09-03
基金项目：河南省科技发展计划(编号：152102210049)。
作者简介：朱学亮(1991—)，男，河南长葛人，硕士研究生，主要研究方向γ-聚谷氨酸发酵过程的调控及其实际应用。E-mail：513061038@qq.com。
通信作者：陈双喜，博士，教授，主要研究方向微生物资源开发与利用。Tel：(0371)23887799；E-mail：csx1231@126.com。

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更新日期/Last Update: 2018-07-05