Interactions of inorganic oxide nanoparticles with sewage biosolids
The use of nanoparticles (NPs) in manufacturing continues to increase despite the growing concern over their potential environmental and health effects. Understanding the interaction of NPs and sewage sludge is crucial for determining the ultimate fate of NPs released to municipal wastewater treatme...
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Published in | Water science and technology Vol. 66; no. 9; pp. 1821 - 1827 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
England
IWA Publishing
01.01.2012
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Subjects | |
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Abstract | The use of nanoparticles (NPs) in manufacturing continues to increase despite the growing concern over their potential environmental and health effects. Understanding the interaction of NPs and sewage sludge is crucial for determining the ultimate fate of NPs released to municipal wastewater treatment plants (WWTPs) as those interactions will determine whether the bulk of the material is retained in the sludge or released in the effluent stream. Analyzing the affinity of aluminum oxide, cerium oxide, and silicon oxide NPs, which are commonly used in semiconductor manufacturing processes, for biosolids used in municipal WWTPs provides a basis for estimating their removal efficiency. Batch studies were performed and the NPs were shown to partition onto the cellular surface. At the maximum equilibrium values tested (75-92 mg nanoparticles/L), the concentration of Al(2)O(3), CeO(2) and SiO(2) associated with the sludge was 137, 238, and 28 mg/g-sludge VSS, respectively. These results suggest that electrostatic interactions play a major role in determining NP association with biosolids. |
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AbstractList | The use of nanoparticles (NPs) in manufacturing continues to increase despite the growing concern over their potential environmental and health effects. Understanding the interaction of NPs and sewage sludge is crucial for determining the ultimate fate of NPs released to municipal wastewater treatment plants (WWTPs) as those interactions will determine whether the bulk of the material is retained in the sludge or released in the effluent stream. Analyzing the affinity of aluminum oxide, cerium oxide, and silicon oxide NPs, which are commonly used in semiconductor manufacturing processes, for biosolids used in municipal WWTPs provides a basis for estimating their removal efficiency. Batch studies were performed and the NPs were shown to partition onto the cellular surface. At the maximum equilibrium values tested (75-92 mg nanoparticles/L), the concentration of Al2O3, CeO2 and SiO2 associated with the sludge was 137, 238, and 28 mg/g-sludge VSS, respectively. These results suggest that electrostatic interactions play a major role in determining NP association with biosolids. The use of nanoparticles (NPs) in manufacturing continues to increase despite the growing concern over their potential environmental and health effects. Understanding the interaction of NPs and sewage sludge is crucial for determining the ultimate fate of NPs released to municipal wastewater treatment plants (WWTPs) as those interactions will determine whether the bulk of the material is retained in the sludge or released in the effluent stream. Analyzing the affinity of aluminum oxide, cerium oxide, and silicon oxide NPs, which are commonly used in semiconductor manufacturing processes, for biosolids used in municipal WWTPs provides a basis for estimating their removal efficiency. Batch studies were performed and the NPs were shown to partition onto the cellular surface. At the maximum equilibrium values tested (75-92 mg nanoparticles/L), the concentration of Al(2)O(3), CeO(2) and SiO(2) associated with the sludge was 137, 238, and 28 mg/g-sludge VSS, respectively. These results suggest that electrostatic interactions play a major role in determining NP association with biosolids. |
Author | Rottman, Jeff Sierra-Alvarez, Reyes Shadman, Farhang |
Author_xml | – sequence: 1 givenname: Jeff surname: Rottman fullname: Rottman, Jeff email: jrottman@email.arizona.edu organization: Department of Chemical and Environmental Engineering, University of Arizona, P.O Box 210011, Tucson, AZ 85721, USA. jrottman@email.arizona.edu – sequence: 2 givenname: Farhang surname: Shadman fullname: Shadman, Farhang – sequence: 3 givenname: Reyes surname: Sierra-Alvarez fullname: Sierra-Alvarez, Reyes |
BackLink | https://www.ncbi.nlm.nih.gov/pubmed/22925851$$D View this record in MEDLINE/PubMed |
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SubjectTerms | Aluminium Aluminum Aluminum oxide Aluminum Oxide - chemistry Biosolids Cerium Cerium oxides Electronics industry Electrostatic properties Environmental effects Interactions Manufacturing Manufacturing industry Municipal wastewater Nanoparticles Nanoparticles - chemistry Oxides - chemistry Removal Sewage Sewage - chemistry Sewage sludge Silica Silicon dioxide Silicon Dioxide - chemistry Silicon oxide Sludge Solid wastes Waste Disposal, Fluid - methods Wastewater Wastewater treatment Wastewater treatment plants Water treatment plants |
Title | Interactions of inorganic oxide nanoparticles with sewage biosolids |
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