水处理混凝除钼研究进展与展望

doi:10.19964/j.issn.1006-4990.2024-0009

Abstract

Abstract:

With the rapid development of industries，the demand for molybdenum（Mo） in steel，petrochemical engineering，electronics and other industries is increasing day by day，and the large-scale mining of Mo ore has brought serious water pollution problems.Mo-polluted water bodies posed a great threat to human health and ecosystem stability.In the treatment of Mo-polluted groundwater，surface water and Mo-containing wastewater，economical and efficient coagulation treatment technology was most widely used.On the basis of analyzing the water pollution status and treatment technology of Mo，the research progress of coagulants，main factors，coagulation process and coagulation mechanism for Mo removal were reviewed in this paper.Iron salt was the most widely used coagulant for Mo removal，and Mo contaminants could be removed under complex water matrix conditions within the optimized pH range of 4.0~5.0.The effects of alkalinity，hardness，phosphates，and organic pollutants in water on Mo removal by coagulation should be paied more attention.The multi-stage coagulation process showed remarkable effects in the actual treatment of Mo-containing water.Electrostatic adsorption，surface complexation and sweep flocculation were the main mechanism for Mo removal by coagulation.In addition，the scientific research and engineering application of Mo removal by coagulation technology were summarized and prospected，providing useful references for the water pollution control of Mo.

Key words: coagulation, flocculation, molybdenum removal, ferric salt, aluminum salt

CLC Number:

TQ136.12

GAN Yonghai, DING Xinhe, DING Chengcheng, LUO Jun, XU Bin, KONG Ming, SONG Xiaojie, CUI Yibin. A comprehensive review of molybdenum removal by coagulation in water treatment[J]. Inorganic Chemicals Industry, 2024, 56(9): 24-33.

Figures/Tables 8

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混凝剂	水/废水类型	pH	混凝剂投加量/（mg·L^-1）	助凝剂投加量/（mg·L^-1）	初始质量浓度/（mg·L^-1）	处理后质量浓度/（mg·L^-1）
Fe₂（SO₄）₃	模拟水样^［16］	5.0	10 ^a		0.70	0.04
FeCl₃	模拟水样^［16］	6.0	10 ^a		0.70	0.04
铁磁性团簇+FeCl₃	辽宁省某河流水库^［17］	5.5~8.0	25.2^a		0.49~0.55	<0.07
FeCl₃		7.93	25.2^a		0.14~0.16
AlCl₃			12.2^a		0.34~0.39
TiCl₄			21.6^a		0.45~0.51
FeCl₃	钼污染地下水^［18］	4.0	10^a	0.3	33.4	4.0
FeCl₃	模拟水样^［19］	6.0	10^a		0.70	0.035
FeCl₃	模拟水样^［20］	5.0	2.6^a		10	0.59
FeCl₃	模拟水样^［21］	4.0	>233^a		100	<1.0
FeCl₃ Al₂（SO₄）₃	模拟水样^［22］	<6.0 6.5~8.0	5^b 5^b		0.35 0.35	<0.07 0.35
PFS PAC	模拟采矿废水^［23］	4.5	100~400^b 100~400^b		20.0 20.0	<1.5 18.0
PFS	模拟采矿废水^［24］	5.0	90^b		18.0	1.48
PFC	模拟水样^［25］	5.0	15^a		0.70	0.028
		7.0	25^a		0.70	<0.07
PFS	赤土店北沟河流域^［27］	5.8~6.0	600^b		0.53~1.85	<0.07
PAM+PFS	依吉密河、呼兰河^［28］	7.6~8.2	300^b	10	0.50~1.97	<0.07
FeCl₃	钼污染地下水^［29］	6.56	16.8^a		0.112	0.002 6
FeCl₃						<0.06
AlCl₃	模拟水样^［30］	7.0	40 ^a		0.70	>0.56
MnCl₂+NaClO₂	模拟水样^［30］	7.0	40 ^a		0.70	0.70

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A comprehensive review of molybdenum removal by coagulation in water treatment

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