摘要
为探究印染废水中残留铁混凝剂与有机污染物对反渗透膜污染的影响,本研究通过构建低浓度梯度的三价铁离子(Fe^(3+))与不同有机物(腐殖酸、苯胺、对氯苯酚)的模拟废水体系,系统考察Fe^(3+)浓度与有机物种类对RO膜污染行为的作用机制。结果表明,在单一有机物体系中,腐殖酸形成疏松、可逆的滤饼层,而苯胺和对氯苯酚则导致难以清洗的不可逆污染。在三种有机物共存体系中,即使无铁离子存在,有机物之间呈现协同污染的趋势。Fe^(3+)通过电中和与配位作用促进污染物聚集,但其浓度变化对膜污染的影响有限。因此在实际运行中,不仅要调控混凝剂投加量,更要优先识别并去除易与铁发生相互作用的特征性有机物,以实现膜污染的有效防控。
In order to explore the impact of residual iron coagulants and organic pollutants in dyeing wastewater on reverse osmosis(RO)membrane fouling,this study constructs a series of simulated wastewater systems with low concentration gradients of trivalent iron ions(Fe^(3+))and different organic substances(humic acid,aniline,and 4-chlorophenol),systematically investigating the mechanism of Fe^(3+)concentration and organic substance types on RO membrane fouling behavior.The results indicate that in the single organic substance system,humic acid forms a loose and reversible filter cake layer,while aniline and 4-chlorophenol lead to irreversible fouling that are difficult to clean.In the coexisting system of the three organic substances,even without the presence of iron ions,there is a trend of synergistic fouling among the organic substances.Fe^(3+)promotes the aggregation of pollutants through electro-neutralization and complexation,but its concentration variation has a limited effect on membrane fouling.Therefore,in practical operations,it is essential not only to control the dosage of coagulants,but more importantly,to prioritize the identification and removal of characteristic organic components prone to interact with iron,so as to achieve effective prevention and control of membrane fouling.
作者
杨莹
何笑
杨海
沈忱思
马春燕
YANG Ying;HE Xiao;YANG Hai;SHEN Chensi;MA Chunyan(School of Environmental Science and Engineering,Donghua University,Shanghai 201620,China)
出处
《印染》
北大核心
2026年第1期12-17,共6页
China Dyeing and Finishing
基金
中国纺织工业联合会应用基础研究项目(J202407)
中央高校基金(2232025G-11)。
关键词
反渗透膜污染
铁混凝剂
有机物协同作用
印染废水
reverse osmosis membrane fouling
iron coagulant
synergistic effect of organic substances
dyeing wastewater
