二价铁催化过碳酸钠处理水中乙苯

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Abstract

Ethylbenzene (EB) degradation performance in Fe (II) activated sodium percarbonate (SPC) system was investigated in this study. The effects of various factors, such as the initial SPC and Fe (II) concentrations, anions (Cl^-, HCO₃^-, SO₄²^-, and NO₃^-) concentration, natural organic matters (NOM), and initial solution pH were evaluated. The results showed that EB (1mmol/L) could be degraded completely in 20min with both SPC and Fe (II) dosages of 12mmol/L. Both Cl^- and HCO₃^- anions and NOM had significant inhibitive effect on EB degradation, while the influence of SO₄²^- and NO₃^- was negligible at the tested ionic strength ranges. The EB removal was still significant at the initial solution pH of 9 even though the degradation of EB decreased with the increasing of initial solution pH (from 3.0 to 11.0), suggesting that Fe(II) activated SPC process was an effective technique for EB degradation at a wider pH range. In addition, the results of free radical probe tests and free radical scavenger tests indicated that ×OH was the predominant species responsible for EB degradation even though both ×OH and O₂^·^- were generated in the SPC-Fe(II) system.

Key words： ethylbenzene sodium percarbonate hydroxyl radical groundwater remediation

Received: 12 October 2015

PACS:

X523

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	Articles by authors
	CUI Hang
	FU Xiao-ri
	GU Xiao-gang
	LU Shu-guang
	QIU Zhao-fu
	SUI Qian

Cite this article:

CUI Hang,FU Xiao-ri,GU Xiao-gang等. Degradation of ethylbenzene by Fe(II) activated sodium percarbonate process in aqueous solution[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(5): 1449-1455.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2016/V36/I5/1449

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