CaO<sub>2</sub>/Fe<sup>2+</sup>协同控制污水管道硫化物的效能

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Abstract This paper proposes a CaO₂/Fe²⁺ collaborative control method for addressing the corrosion and odor issues in sewer systems. The effect of different dosing methods on the kinetics and mechanism of sulfide oxidation was analyzed, followed by the analysis on the effect of the pH level, temperature, inorganic irons and other factors on the oxidative removal efficiency of sulfide. The results showed that the synergistic oxidation of CaO₂/Fe²⁺ for sulfides removal agrees with the pseudo-first-order reaction kinetics with the main active specie of oxidized sulfides of HO^·. A molar ratio of CaO₂ and Fe²⁺ of 4:1 corresponds to the optimal the oxidation rate of sulfides. The oxidation rate of sulfide was negatively correlated with correlated with temperature. No significant effect was found for common anions and ammonium ions on oxidation rate. When the ratio of dosage to sewage (W/V) is 0.30%, the recovery period of 50% sulfide generation rate is 8.34 days, which indicates that the synergistic dosing of CaO₂/Fe²⁺ can effectively control the formation of sulfide.

Key words： sewer corrosion foul-smelling gases synergistic effects reaction kinetics control efficiency

Received: 04 March 2024

PACS:	X172
	X153

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	Articles by authors
	ZHANG Zhi-qiang
	LIU Yu-xin
	SUN Yi-fan
	ZHAO Lei
	REN Xiao-wei
	YANG Jing
	SONG Shan-shan
	REN Ya-ting
	LU Jin-suo

Cite this article:

ZHANG Zhi-qiang,LIU Yu-xin,SUN Yi-fan等. Efficiency of sulfide control using synergistic calcium peroxide and ferrous ion in sewer pipelines[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(10): 5649-5657.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I10/5649

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