|本期目录/Table of Contents|

[1]李阳,成家杨,钟钰,等.2种浮萍干粉对Cd2+的吸附性能[J].江苏农业科学,2017,45(15):248-254.
 Li Yang,et al.Biosorption of Cd2+ by dry powder of two duckweed species[J].Jiangsu Agricultural Sciences,2017,45(15):248-254.
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2种浮萍干粉对Cd2+的吸附性能(PDF)
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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第45卷
期数:
2017年15期
页码:
248-254
栏目:
资源与环境
出版日期:
2017-08-05

文章信息/Info

Title:
Biosorption of Cd2+ by dry powder of two duckweed species
作者:
李阳 成家杨 钟钰 唐杰
北京大学深圳研究生院,广东深圳 518055
Author(s):
Li Yanget al
关键词:
浮萍生物吸附剂镉污染吸附机制
Keywords:
-
分类号:
X703
DOI:
-
文献标志码:
A
摘要:
以多根紫萍(Spirodela polyrhiza)、少根紫萍(Landoltia punctata)干粉为生物质吸附剂,考察2种浮萍干粉对水环境中镉离子(Cd2+)的吸附作用,探索处理含镉废水的新途径。结果表明,浮萍干粉投量、溶液初始pH值、吸附时间、溶液初始Cd2+浓度是影响吸附效果的主要因素;2种浮萍干粉对Cd2+的吸附在反应开始10 min后达到平衡,且吸附容量均可达50 mg/g;当浮萍干粉投加量为0.2 g、溶液初始pH值为6.8、处理溶液初始Cd2+浓度为50 mg/L时,2种浮萍干粉对镉的去除率分别达到83.15%(少根紫萍)、95.72%(多根紫萍);两者的吸附动力学过程均可用二级速率方程进行描述,决定系数r2均达到0.999以上;在5~500 mg/L浓度范围内,2种浮萍干粉的等温吸附曲线与Langmuir、Freundlich、Tempkin等温吸附模型的拟合性均较好,线性拟合的r2均在0.9以上,且通过分析模型相关参数发现,2种浮萍干粉对Cd2+具有较好的吸附效果,是一种潜在的新型生物吸附剂;此外,扫描电镜及红外光谱分析结果表明,浮萍干粉所含糖类中的羟基及酰胺中的氨基可能参与了对Cd2+的吸附。
Abstract:
-

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备注/Memo

备注/Memo:
收稿日期:2016-03-30
基金项目:国家自然科学基金(编号:81130070);公益性行业(海洋)科研专项(编号:201305022);深圳市海外高层次人才创新创业专项基金(编号:KQCX201405211502553)。
作者简介:李阳(1990—),女,内蒙古鄂尔多斯人,硕士研究生,研究方向为生物能源工程。E-mail:sunshinein@sz.pku.edu.cn。
通信作者:唐杰,博士,助理研究员,主要从事生物质开发与利用相关研究工作。E-mail:tangjie@pkusz.edu.cn。
更新日期/Last Update: 2017-08-05