Tags

Type your tag names separated by a space and hit enter

Effect of ZnO particles on activated sludge: role of particle dissolution.
Sci Total Environ. 2011 Jun 15; 409(14):2852-7.ST

Abstract

The release of nanoparticles (NPs) into the environment, including wastewater treatment plants, is expected to increase in the future. Therefore, it is important to understand the potential effects of these NPs on activated sludge treatment processes. A pulse-flow respirometer was used to study the toxicity of nano-ZnO on activated sludge endogenous respiration, BOD biodegradation, and nitrification. In addition, toxicities of bulk ZnO particles and Zn ion (e.g. soluble Zn) were also studied. All three Zn forms were found to adversely impact the activity of activated sludge, with soluble Zn exhibited the greatest toxicity. The effects of nano-ZnO and bulk ZnO on activated sludge were caused by soluble Zn resulting from ZnO particle dissolution. The IC(50) values of soluble Zn on activated sludge endogenous respiration, BOD biodegradation, ammonia oxidation, and nitrite oxidation were 2.2, 1.3, 0.8, and 7.3 mg-Zn/L, respectively. Therefore, the first step of nitrification was most sensitive to Zn.

Authors+Show Affiliations

Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

21529894

Citation

Liu, Guoqiang, et al. "Effect of ZnO Particles On Activated Sludge: Role of Particle Dissolution." The Science of the Total Environment, vol. 409, no. 14, 2011, pp. 2852-7.
Liu G, Wang D, Wang J, et al. Effect of ZnO particles on activated sludge: role of particle dissolution. Sci Total Environ. 2011;409(14):2852-7.
Liu, G., Wang, D., Wang, J., & Mendoza, C. (2011). Effect of ZnO particles on activated sludge: role of particle dissolution. The Science of the Total Environment, 409(14), 2852-7. https://doi.org/10.1016/j.scitotenv.2011.03.022
Liu G, et al. Effect of ZnO Particles On Activated Sludge: Role of Particle Dissolution. Sci Total Environ. 2011 Jun 15;409(14):2852-7. PubMed PMID: 21529894.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of ZnO particles on activated sludge: role of particle dissolution. AU - Liu,Guoqiang, AU - Wang,Demin, AU - Wang,Jianmin, AU - Mendoza,Cesar, Y1 - 2011/05/06/ PY - 2010/12/20/received PY - 2011/03/12/revised PY - 2011/03/16/accepted PY - 2011/5/3/entrez PY - 2011/5/3/pubmed PY - 2011/9/3/medline SP - 2852 EP - 7 JF - The Science of the total environment JO - Sci Total Environ VL - 409 IS - 14 N2 - The release of nanoparticles (NPs) into the environment, including wastewater treatment plants, is expected to increase in the future. Therefore, it is important to understand the potential effects of these NPs on activated sludge treatment processes. A pulse-flow respirometer was used to study the toxicity of nano-ZnO on activated sludge endogenous respiration, BOD biodegradation, and nitrification. In addition, toxicities of bulk ZnO particles and Zn ion (e.g. soluble Zn) were also studied. All three Zn forms were found to adversely impact the activity of activated sludge, with soluble Zn exhibited the greatest toxicity. The effects of nano-ZnO and bulk ZnO on activated sludge were caused by soluble Zn resulting from ZnO particle dissolution. The IC(50) values of soluble Zn on activated sludge endogenous respiration, BOD biodegradation, ammonia oxidation, and nitrite oxidation were 2.2, 1.3, 0.8, and 7.3 mg-Zn/L, respectively. Therefore, the first step of nitrification was most sensitive to Zn. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/21529894/Effect_of_ZnO_particles_on_activated_sludge:_role_of_particle_dissolution_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(11)00275-0 DB - PRIME DP - Unbound Medicine ER -