Investigation of aqueous Fe(III) and Mn(II) removal using dolomite as a permeable reactive barrier material

Autor:	Zhan Liang-Tong, Zhao Li, You Yuqing, Hao Na, Bate Bate
Rok vydání:	2022
Předmět:	Environmental Chemistry General Medicine Waste Management and Disposal Water Science and Technology
Zdroj:	Environmental Technology. 44:2039-2053
ISSN:	1479-487X 0959-3330
Popis:	Iron (Fe) and manganese (Mn) are the most frequently detected heavy metals in the soil and groundwater near municipal landfill sites. Natural calcium-carbonate-based materials, such as dolomite, effectively remove metal ions and are suitable as reactive materials for permeable reactive barriers (PRBs). However, multiple heavy metals usually coexist in contaminated groundwater, the effectiveness and competitive precipitation mechanisms in the removal of Fe(III) and Mn(II) are unclear. In this study, we investigated the efficiency and influencing factors of the removal of single and coexisting Fe(III) and Mn(II) by dolomite through experimental batch and column tests, property characterization, and PHREEQC simulations. Dolomite with 1.18-2.36 mm particle size showed the best removal efficiency for Fe(III) and Mn(II) through precipitation. Fe(III) was preferentially precipitated by dolomite with higher removal efficiency, attributed to the lower solubility product (K
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf8709a88a44d1c8e4aef7572c618f01 https://doi.org/10.1080/09593330.2021.2020340 Zobrazit plný text záznamu