膜技术在含钴浓盐水资源化中应用

doi:10.11962/1006-4990.2019-0368

Abstract

Abstract:

Cobalt-containing wastewater was treated by ceramic membrane-two stage nanofiltration-resin-evaporation process. The trend of membrane flux changing with time was analyzed.The optimum conditions of resin adsorption was determined and the economic benefits of wastewater treatment process were calculated.The results showed that 50 nm ceramic membrane can effectively remove suspended particles in wastewater,and the flux reached 933 L/(m ²·h).CoCl₂ can be separated effectively from NH₄Cl by nanofiltration,and the removal rate of Co ²⁺ reached 71.14%.After deep purification of by resin,NH₄Cl met the requirement of GB/T 2946—2018,Ammonium Chloride.The treatment process is an economical and feasible cobalt-contain-ing wastewater treatment process.

Key words: wastewater containing-cobalt, ceramic membrane, nanofiltration, ion exchange resin

CLC Number:

TQ138.12

Peng Wenbo,Li Tengfei,Bai Zuguo,Chen Daokang,Yun Jianjun. Application of membrane technology in resource recovery of cobalt-containing saline wastewater[J]. Inorganic Chemicals Industry, 2020, 52(5): 65-67.

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References 15

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项目	ρ（氨氮）/ （mg·L^-1）	ρ（TDS）/ （g·L^-1）	ρ（Cl^-）/ （mg·L^-1）	ρ（Co²⁺）/ （mg·L^-1）	TOC/ （mg·L^-1）
一级纳滤进水	18 330	90.30	64.81	119.21	27.98
1.5 MPa 纳滤清液	17 060	82.25	62.97	43.55	20.60
1.5 MPa 纳滤浓液	18 980	97.13	73.55	1 409.21	79.58
2.0 MPa 纳滤清液	16 000	83.36	61.53	33.41	20.04
2.0 MPa 纳滤浓液	21 400	130.13	74.51	1 480.62	130.10
2.5 MPa 纳滤清液	16 100	83.40	63.24	32.50	20.60
2.5MPa 纳滤浓液	19 460	101.30	73.51	1 895.40	98.40

项目	氨氮/ （mg·L^-1）	TDS/ （g·L^-1）	ρ（Cl^-）/ （mg·L^-1）	ρ（Co²⁺）/ （mg·L^-1）	TOC/ （mg·L^-1）
二级纳滤清液	18 500	83.24	59.61	9.92	12.48
二级纳滤浓液	19 670	111.15	78.35	319.40	34.28

项目	w（NH₄Cl）/ %	w（Fe）/ %	w（重金属）/%	w（硫酸盐）/%	pH（200 g/L）溶液
样品	99	0.000	0.001 2	0	4.4
GB/T 2946— 2018	≥99	≤0.001	≤0.003 0	—	4.0~5.8

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Application of membrane technology in resource recovery of cobalt-containing saline wastewater

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