Specific Chemical Interactions between Metal Ions and Biological Solids Exemplified by Sludge Particulates
Abstract
The adsorption of metals onto biological surfaces was studied exemplified by municipal sludge particulates of the primary, the secondary, and the tertiary sludge types from four regional wastewater treatment plants. Major factors affecting the extent of metal adsorption including pH, DOM, total biomass, and total metal loading were studied. The acidity-basicity characteristics of the DOM, the metal ions (Lewis acids), and the surface of the sludge particulates make pH the most important parameter in metal adsorption. Change in pH can modify the speciation of the metal ions, the DOM, and the surface acidity of the sludge particulates and subsequently determines the degree of metal distribution between the aqueous phase and the sludge solids. Information on the acidity-basicity characteristics of the DOM and the sludge particulates are used to calculate the stability constant of metal ion-sludge complexes. © 2014 Elsevier Ltd.
Recommended Citation
C. P. Huang and J. Wang, "Specific Chemical Interactions between Metal Ions and Biological Solids Exemplified by Sludge Particulates," Bioresource Technology, vol. 160, pp. 32 - 42, Elsevier, Jan 2014.
The definitive version is available at https://doi.org/10.1016/j.biortech.2014.01.043
Department(s)
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Dissolved organic matter (DOM); Metal ions; Sludge particulates; Surface acidity; Surface complex formation
International Standard Serial Number (ISSN)
1873-2976; 0960-8524
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Elsevier, All rights reserved.
Publication Date
01 Jan 2014
PubMed ID
24495800
