Impact of contact time, pH, ionic strength, soil humic substances, and temperature on the uptake of Pb(II) onto graphene oxide
Impact of contact time, pH, ionic strength, soil humic substances, and temperature on the uptake of Pb(II) onto graphene oxide
复制标题
接触时间、pH、离子强度、土壤腐殖质和温度对氧化石墨烯吸收 Pb(II) 的影响
DOI:
10.1080/01496395.2017.1281302
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发表时间:
2017-01
影响因子:
2.8
通讯作者:
Fang Yanfeng
中科院分区:
文献类型:
--
作者:
Li Xue;Zhao Kang;You Caiyin;Pan Hui;Tang Xiaoping;Fang Yanfeng
ABSTRACT 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.
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