期刊论文

Treatment Performance of Ultrafiltration on Low Concentration Wastewater Containing Cd~(2 +) Enhanced by Polyelectrolyte

中文

中国给水排水

1000-4602

2021

37

11

70-75,83

10.19853/j.zgjsps.1000-4602.2021.11.012

国家自然科学基金资助项目（51709285）； 湖南省自然科学基金资助项目（2018JJ3564、2020JJ4643）； 湖南省教育厅科学研究重点项目（17A233）;湖南省教育厅科学研究优秀青年项目（18B406、18B415）；

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分别采用聚丙烯酸(PAA)和壳聚糖(CTS)作为聚电解质,研究了聚电解质强化超滤法处理含Cd~(2 +)重金属废水,并考察了聚电解质浓度、pH值、共存离子对截留率、渗透性能和膜污染的影响。结果表明,对于20 mg /L的含Cd~(2 +)废水,当PAA、CTS浓度为100 mg /L时去除效果最好,对Cd~(2 +)的去除率分别为90.1%和91.6%,对PAA和CTS的去除率分别为71.5%和69.4%。pH值对Cd~(2 +)的去除影响较大,Cd~(2 +)去除率随着pH值的上升而明显增加,PAA和CTS的去除率则无明显变化。在PAA溶液中,4种共存离子对Cd~(2 +)的去除影响程度排序为Na~+ > Cu~(2 +) > Mg~(2 +) > Ca~(2 +);在CTS溶液中,对Cd~(2 +)的去除影响程度排序则...

Ultrafiltration was enhanced by polyelectrolyte for the treatment of heavy metal wastewater containing Cd~(2 +) by using polyacrylic acid (PAA) and chitosan (CTS) as polyelectrolytes,and effects of polyelectrolyte concentration,pH value and coexisting ions on rejection rate,permeability and membrane fouling were explored. For the treatment of wastewater with Cd~(2 +) concentration of 20 mg /L, the best removal performance was obtained when PAA and CTS concentrations were both 100 mg /L, removal efficiencies of Cd~(2 +) were 90.1% and 91.6%,resp...