On the cleaning procedure of reverse osmosis membrane fouled by steel wastewater

被引：0
|
作者：
Yingxin Mei
Haigang Li
Huanjin Xia
机构：
[1] Wuhan Institute of Marine Electric Propulsion,
来源：
Korean Journal of Chemical Engineering | 2016年 / 33卷
关键词：
Reverse Osmosis; Cleaning; Steel Wastewater; Integrated Cleaning; Metallic Oxides;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The proper cleaning procedure for reverse osmosis (RO) membranes holds the key to achieving sustainable operation of RO processes during long-term filtration such as the reclamation of wastewater. In this study, the most adequate cleaning protocol was tested for RO membranes fouled by the steel wastewater. X-ray photoelectron spectroscopy (XPS) analysis of the fouling layer revealed the presence of the aromatics, aliphatic hydrocarbons, metallic oxides and hydroxides. An integrated cleaning procedure was developed for flux recovery. That is, metal chelating agent (MCA) plus alkaline-oxidant cleaning procedure consisting in one cleaning stage or two cleaning stages in series. MCA cleaning with 2 mM disodium ethylenediaminetetraacetate (Na2-EDTA) solution followed by alkaline-oxidant cleaning with 5 mM NaOCl+NaOH/pH 12.0 solution provided the maximum cleaning efficiency.
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页码：2668 / 2673
页数：5
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