Sulfides in waters could be converted to pyrites through mineralization with Fe/MgO/Ni(II) promotion

doi:10.1016/j.cej.2024.149335

	Sulfides in waters could be converted to pyrites through mineralization with Fe/MgO/Ni(II) promotion
	Wang, Zheng 1,2,3; Li, Zhaoran 1; Liu, Qunqun 1; Sheng, Yanqing 1,2
刊名	CHEMICAL ENGINEERING JOURNAL
	2024-03-01
卷号	483 页码:14
关键词	Sulfide removal Pyrite Trace elements Nickel Fe/MgO
ISSN号	1385-8947
DOI	10.1016/j.cej.2024.149335
通讯作者	Sheng, Yanqing(yqsheng@yic.ac.cn)
英文摘要	Current sulfide removal techniques are generally associated with secondary pollution. In this work, Fe/MgO/Ni (II) system was constructed to remove sulfide from waters thoroughly by transforming it into stable pyrite (FeS2). The transformation could be finished quickly through the promotion of Ni2+ at all pH conditions, and the optimal Ni/Fe molar ratio was 1.0. The FeS2 could be formed in 360 min and the reaction was finished at 600 min when the initial concentration of sulfide and Ni2+ was 181.95 mg/L and 164.52 mg/L, respectively. The highest content of SO42- was merely 2.06 %, while the content of S2O32- /SO32- increased with reaction (56.99 %-67.21 %) in the whole process. The content of sulfide and Ni2+ in the solution were not detected after reaction. The mineralization process was not affected by sodium salt addition, however, it was greatly affected by calcium salt, where the ascensional range of S2O32-/SO32- and SO42- was 50.03 %-70.06 % and 9.84 %-14.76 %, respectively, and the content of sulfide on Fe/MgO was only 14.66 %. Higher temperature would produce more SO42- and H+. The rapid formation mechanism of FeS2 was mainly through Ni2+ substituting Fe in FeS to form Ni-doped FeS precursors that reacted with polysulfide and then promoted the nucleation of FeS2, in the meantime, the reaction to form S2O32-/SO32-, SO42-, Ni(OH)2 and H+ also were generated in this process. This study provides a new insight for the efficient treatment of sulfide containing wastewater.
WOS关键词	WASTE-WATER ; HYDROGEN-SULFIDE ; REMOVAL ; OXIDATION ; KINETICS ; NICKEL ; MECHANISM ; EFFICIENT ; PATHWAYS ; SULFUR
WOS研究方向	Engineering
语种	英语
WOS记录号	WOS:001181243300001
资助机构	Key Project of Shandong Provincial Natural Science Foundation ; Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/34933]
专题	中国科学院烟台海岸带研究所
通讯作者	Sheng, Yanqing
作者单位	1.Chinese Acad Sci, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China 2.Shandong Acad Environm Planning, State Environm Protect Key Lab Land & Sea Ecol Gov, Jinan 250101, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zheng,Li, Zhaoran,Liu, Qunqun,et al. Sulfides in waters could be converted to pyrites through mineralization with Fe/MgO/Ni(II) promotion[J]. CHEMICAL ENGINEERING JOURNAL,2024,483:14.
APA	Wang, Zheng,Li, Zhaoran,Liu, Qunqun,&Sheng, Yanqing.(2024).Sulfides in waters could be converted to pyrites through mineralization with Fe/MgO/Ni(II) promotion.CHEMICAL ENGINEERING JOURNAL,483,14.
MLA	Wang, Zheng,et al."Sulfides in waters could be converted to pyrites through mineralization with Fe/MgO/Ni(II) promotion".CHEMICAL ENGINEERING JOURNAL 483(2024):14.