TREATMENT OF ELECTROLYTIC MANGANESE WASTEWATER BY PRECIPITATION AND HYDROPHOBIC HOLLOW FIBER MEMBRANE PROCESS

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	TREATMENT OF ELECTROLYTIC MANGANESE WASTEWATER BY PRECIPITATION AND HYDROPHOBIC HOLLOW FIBER MEMBRANE PROCESS
	Long, XueJun ; Wang, Jun ; Qu, Dan
刊名	FRESENIUS ENVIRONMENTAL BULLETIN
	2011
卷号	20 期号:12 页码:3180—3185
关键词	electrolytic manganese wastewater precipitation ammonia hydrophobic hollow fiber membrane
中文摘要	Precipitation was integrated with hydrophobic polyvinylidene fluoride (PVDF) hollow fiber membrane process for the removal of manganese and ammonia in electrolytic manganese wastewater. Different precipitants, including NaOH, poly aluminum chloride, polyacrylatnide and NH(4)HCO(3), were added into wastewater and reacted with manganese to form precipitation for manganese removal. It was found that NH(4)HCO(3) showed the highest manganese removal efficiency (up to 98.8%) compared with the other three precipitants. The concentration of manganese decreased from 15420 to 182.5 mg/L when the dosage of NH(4)HCO(3) was 12 g/L and the settling time was 2 h. In addition, the formed MnCO(3) is an important industrial material. Subsequent membrane process provided a hydrophobic barrier for residual manganese and a stripping channel for ammonia. Ammonia diffused through membrane pores to the stripping solution containing sulfuric acid. Such hydrophobic PVDF membrane process enabled 99.9% removal of ammonia. During a long-term performance of membrane process, ammonia decreased sharply and stabilized at about 203 mg/L, with the removal efficiency of 99.4%. Acceleration caused by ammonia stripping to the permeate flux was found; however, it may disappear accompanied with the reduction of ammonia. Membrane fouling caused by manganese and magnesium was also found and led to a permeate flux decline. Manganese was not detected during the whole performance, showing that PVDF exhibited a good hydrophobicity and stability.
WOS记录号	WOS:000299241800013
公开日期	2012-10-18
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/7114]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Long, XueJun,Wang, Jun,Qu, Dan. TREATMENT OF ELECTROLYTIC MANGANESE WASTEWATER BY PRECIPITATION AND HYDROPHOBIC HOLLOW FIBER MEMBRANE PROCESS[J]. FRESENIUS ENVIRONMENTAL BULLETIN,2011,20(12):3180—3185.
APA	Long, XueJun,Wang, Jun,&Qu, Dan.(2011).TREATMENT OF ELECTROLYTIC MANGANESE WASTEWATER BY PRECIPITATION AND HYDROPHOBIC HOLLOW FIBER MEMBRANE PROCESS.FRESENIUS ENVIRONMENTAL BULLETIN,20(12),3180—3185.
MLA	Long, XueJun,et al."TREATMENT OF ELECTROLYTIC MANGANESE WASTEWATER BY PRECIPITATION AND HYDROPHOBIC HOLLOW FIBER MEMBRANE PROCESS".FRESENIUS ENVIRONMENTAL BULLETIN 20.12(2011):3180—3185.