电解锰渣基沸石对锰离子的吸附性能研究

doi:10.11962/1006-4990.2019-0239

Abstract

Abstract:

Electrolytic manganese residue（EMR） is a large amount of solid waste deposited in the open air,during the stockpiling process,toxic pollutant Mn²⁺ will be released. In order to effectively utilize EMR and eliminate the environmental hazards of Mn²⁺,zeolite was prepared by microwave heating and alkali fusion method using electrolytic manganese residue as raw material,and it was used to adsorb Mn²⁺.Then,the factors of initial Mn²⁺ concentration,solution pH,adsorption temperature and adsorption time on the adsorption effects of Mn²⁺ were discussed.The results showed that synthetic zeolite had a better performance for Mn²⁺ removal and the maximum adsorption quantity for Mn²⁺ was 79.18 mg/g under the conditons such as initial Mn²⁺ concentration of 500 mg/L,solution pH of 6,adsorption time of 2 h and adsorption temperature of 50 ℃.The adsorption behavior of zeolite from electrolytic manganese residue on manganese ions was investigated.Results showed,the adsorption of Mn²⁺ on the surface of zeolite fitted well to the pseudo second-order equation,the Langmuir equation model was found to be more suitable to explicate the experimental equilibrium isotherm results than Freundlich equation model.This study revealed that EMR-based zeolite had a good recycling performance and potential application prospect in heavy metal wastewater treatment.

Key words: electrolytic manganese residue, zeolite, manganese ion, adsorption

CLC Number:

TQ137.12

Chang Jun,Jia Fukang,Hu Chengshan,Ye Qianxu. Adsorption of manganese ion by zeolite synthesized from electrolytic manganese residue[J]. Inorganic Chemicals Industry, 2019, 51(9): 61-66.

Figures/Tables 11

References 13

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准一级方程			准二级方程
q_e / （mg·g^-1）	K₁/min^-1	R²	q_e / （mg·g^-1）	K₂/ （g·mg^-1·min^-1）	R²
41.25	0.027 96	0.898 6	84.04	0.001 214	0.995 5

Langmuir方程			Freundlich方程
q_m	K_L	R²	K_F	n	R²
80.91	0.330 2	0.999 6	34.89	5.608	0.611 4

循环使用次数	吸附容量/ （mg·g^-1）	衰减率/ %	循环使用次数	吸附容量/ （mg·g^-1）	衰减率/ %
0	79.18	0.00	3	73.12	7.65
1	77.33	2.34	4	70.74	10.66
2	75.75	4.33	5	65.68	17.05

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Adsorption of manganese ion by zeolite synthesized from electrolytic manganese residue

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