Impact of contact time, pH, ionic strength, soil humic substances, and temperature on the uptake of Pb(II) onto graphene oxide

被引：6

作者：

Li, Xue ^{[1
,2
]}

Zhao, Kang ^{[1
]}

You, Caiyin ^{[1
]}

Pan, Hui ^{[2
]}

Tang, Xiaoping ^{[2
]}

Fang, Yanfeng ^{[2
]}

机构：

[1] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China

[2] Shaoxing Univ, Coll Yuanpei, Shaoxing, Peoples R China

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2017年 / 52卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Graphene oxide; Pb(II); uptake; water quality parameters; ZERO-VALENT IRON; HIGHLY EFFICIENT IMMOBILIZATION; GRAPHITIC CARBON NITRIDE; LAYERED DOUBLE HYDROXIDE; ENHANCED SEQUESTRATION; TITANATE NANOTUBES; AQUEOUS-SOLUTION; COMBINED BATCH; ENVIRONMENTAL-CONDITIONS; COMPETITIVE ADSORPTION;

D O I：

10.1080/01496395.2017.1281302

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The uptake of Pb(II) from wastewaters onto graphene oxide was studied as a function of various water quality parameters. The results indicated that uptake was fast and kinetic uptake could be well fitted by a pseudo-second-order model. The uptake was strongly dependent on pH and independent of ionic strength. Namely, inner-sphere surface complexation was the main uptake mechanism. The presence of humic acid or fulvic acid enhanced the uptake at low pH values, while reduced at high pH. The Langmuir, Freundlich, and Dubinin-Redushkevich (D-R) isotherm models were used to simulate the uptake. Thermodynamics indicated that the uptake was endothermic and spontaneous.

引用

页码：987 / 996

页数：10

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