Purification of acidic wastewater containing Cd(II) using a red mud-loess mixture Column test, breakthrough curve, and speciation of Cd

Purification of acidic wastewater containing Cd(II) using a red mud-loess mixture : Column test, breakthrough curve, and speciation of Cd

© 2024 The Authors This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (CC BY 4.0), which permits copying, adaptation and redistribution, provided the original work is properly cited (http://creativecommons.org/licenses/by/4.0/).

Bibliographische Detailangaben
Veröffentlicht in:Water science and technology : a journal of the International Association on Water Pollution Research. - 1986. - 89(2024), 12 vom: 16. Juni, Seite 3252-3269
1. Verfasser: Lu, Yisi (VerfasserIn)
Weitere Verfasser: Liu, Xiaofeng, Zhang, Hao, Li, Jiashi
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Water science and technology : a journal of the International Association on Water Pollution Research
Schlagworte:Journal Article acid mine drainage breakthrough longevity permeable reactive barrier red mud speciation Cadmium 00BH33GNGH Water Pollutants, Chemical Wastewater
Beschreibung
Zusammenfassung:© 2024 The Authors This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (CC BY 4.0), which permits copying, adaptation and redistribution, provided the original work is properly cited (http://creativecommons.org/licenses/by/4.0/).
In this study, the safety of a red mud-loess mixture (RM-L) for the remediation of groundwater polluted by acid mine drainage (AMD) containing Cd(II) in mining areas was systematically analyzed and clarified. The effects of the initial concentration, flow rate, and packing height on the breakthrough performance and longevity of RM-L as a permeable reactive barrier (PRB) packing material were explored by column tests. The results show that the breakthrough time, saturation time, and adsorption capacity of Cd(II) in RM-L increased with decreasing initial concentration and flow rate, as well as increasing packing height. Moreover, RM-L had a long-term effective acid buffering capacity for acidic wastewater containing Cd(II). An increase in the packing height led to a longer longevity of the PRB than the theoretical value. In addition, the speciation of Cd on RM-L was dominated by carbonate form and iron-manganese oxide form. The surface of the RM-L particles evolved from a dense lamellar structure to small globular clusters after purifying the acidic wastewater containing Cd(II), due to the corrosion of H+ and the reoccupation and coverage by increasingly enriched adsorbates and precipitates of heavy metal ions
Beschreibung:Date Completed 16.08.2024
Date Revised 16.08.2024
published: Print-Electronic
Citation Status MEDLINE
ISSN:0273-1223
DOI:10.2166/wst.2024.187