干旱区生态环境知识资源中心(Arid): Characterization and pH neutralization products of efflorescent salts from mine tailings of (semi-)arid zones

Arid

DOI	10.1016/j.chemgeo.2021.120370
	Characterization and pH neutralization products of efflorescent salts from mine tailings of (semi-)arid zones
	Loredo-Jasso, Alan U.; Villalobos, Mario; Ponce-Perez, Daniela B.; Pi-Puig, Teresa; Meza-Figueroa, Diana; del Rio-Salas, Rafael; Ochoa-Landin, Lucas
通讯作者	Loredo-Jasso, AU (corresponding author), UNAM, Lab Geoquim Ambiental Mol, Lab Nacl Geoquim & Mineral LANGEM, Inst Geol, Ciudad Univ, Coyoacan 04510, Mexico.
来源期刊	CHEMICAL GEOLOGY
ISSN	0009-2541
EISSN	1872-6836
出版年	2021
卷号	580
英文摘要	Acidic water-soluble efflorescent salts in mining residues commonly form from sulfide oxidation and are particularly prevalent in semi-arid to arid environments. These salts are easily carried by winds and may contaminate the environment and affect human health, especially because they contain potentially toxic metals and have high solubilities. In this work, efflorescent salts from four mining sites in Mexico were characterized by X-ray diffraction and chemical analysis. They produced acidic pH values upon dissolution, and were found to be composed mostly of soluble sulfates of Ca(II), Mg(II), Zn(II) and/or Cu(II), and to a lesser extent of Fe(II/III) and/or Al, of variable stoichiometries, crystal water contents and crystallinity. Their physical and chemical characteristics varied highly depending on the underlying geochemical matrix and on the composition of the original mining residues, but gypsum was present in all samples. Two selected samples were dissolved and the solution neutralized, causing substantial precipitation of solids. The precipitates, at pH 7 were found to contain the Cu and/or Zn -rich hydroxysulfates: lahnsteinite [Zn-4(OH)(6)SO4 center dot 3H(2)O], or schulenbergite [Cu3Zn4(OH)(10)(SO4)(2)]. Solubility product constants were determined on these, and on other solids produced in the absence of certain major components [such as sulfate or Zn(II)], by a combination of chemical measurements and geochemical code calculations to speciate some of the components found. These results should enhance thermodynamic properties of databases and help to predict what phases form if pH neutralization occurs or is used for remediation purposes.
英文关键词	Efflorescent salts Hydroxysulfates Schulenbergite Lahnsteinite Solubility product constant
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000689277900004
WOS关键词	SOLUBILITY ; SULFATE ; ZN ; SCHULENBERGITE ; DRAINAGE ; IMPACT ; ZINC ; PRECIPITATION ; GEOCHEMISTRY ; GERHARDTITE
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
来源机构	Universidad Nacional Autónoma de México
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362841
作者单位	[Loredo-Jasso, Alan U.; Villalobos, Mario; Ponce-Perez, Daniela B.] UNAM, Lab Geoquim Ambiental Mol, Lab Nacl Geoquim & Mineral LANGEM, Inst Geol, Ciudad Univ, Coyoacan 04510, Mexico; [Pi-Puig, Teresa] UNAM, Lab Difracc Rayos X, Lab Nacl Geoquim & Mineral LANGEM, Inst Geol, Ciudad Univ, Coyoacan 04510, Mexico; [Meza-Figueroa, Diana; Ochoa-Landin, Lucas] Univ Sonora, Dept Geol, Rosales & Encinas, Hermosillo 83000, Sonora, Mexico; [del Rio-Salas, Rafael] UNAM, Inst Geol, Estn Reg Noroeste ERNO, Hermosillo, Sonora, Mexico
推荐引用方式 GB/T 7714	Loredo-Jasso, Alan U.,Villalobos, Mario,Ponce-Perez, Daniela B.,et al. Characterization and pH neutralization products of efflorescent salts from mine tailings of (semi-)arid zones[J]. Universidad Nacional Autónoma de México,2021,580.
APA	Loredo-Jasso, Alan U..,Villalobos, Mario.,Ponce-Perez, Daniela B..,Pi-Puig, Teresa.,Meza-Figueroa, Diana.,...&Ochoa-Landin, Lucas.(2021).Characterization and pH neutralization products of efflorescent salts from mine tailings of (semi-)arid zones.CHEMICAL GEOLOGY,580.
MLA	Loredo-Jasso, Alan U.,et al."Characterization and pH neutralization products of efflorescent salts from mine tailings of (semi-)arid zones".CHEMICAL GEOLOGY 580(2021).