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Catalytic reduction of nitrate in secondary effluent of wastewater treatment plants by Fe(0) and Pd-Cu/γ-Al2O3.
Water Sci Technol 2016; 73(11):2697-703WS

Abstract

Total nitrogen, in which NO3(-) is dominant in the effluent of most wastewater treatment plants, cannot meet the requirements of the Chinese wastewater discharge standard (<15 mg/L), making nitrate (NO3(-)) elimination attract considerable attention. In this study, reductant iron (Fe(0)) and γ-Al2O3 supported palladium-copper bimetallic catalysts (Pd-Cu/γ-Al2O3) were innovatively used for the chemical catalytic reduction of nitrate in wastewater. A series of specific operational conditions (such as mass ratio of Pd:Cu, catalyst amounts, reaction time and pH of solution) were optimized for nitrate reduction in the artificial solution, and then the selected optimal conditions were further applied for investigating the nitrate elimination of secondary effluent of a wastewater treatment plant in Beijing, China. Results indicated that a better catalytic performance (74% of nitrate removal and 62% of N2 selectivity) could be obtained under the optimal condition: 5 g/L Fe(0), 3:1 mass ratio (Pd:Cu), 4 g/L catalyst, 2 h reaction time and pH 5.1. It is noteworthy to point out that nitrogen gas (N2) predominated in the byproducts without another system to treat ammonium and nitrite. Therefore, the chemical catalytic reduction combining Fe(0) with Pd-Cu/γ-Al2O3 could be regarded as a better alternative for nitrate removal in wastewater treatment.

Authors+Show Affiliations

Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants, School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China E-mail: zifulee@aliyun.com.Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants, School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China E-mail: zifulee@aliyun.com.Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, Taiwan.Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants, School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China E-mail: zifulee@aliyun.com.Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants, School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China E-mail: zifulee@aliyun.com.Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants, School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China E-mail: zifulee@aliyun.com.

Pub Type(s)

Evaluation Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

27232406

Citation

Yun, Yupan, et al. "Catalytic Reduction of Nitrate in Secondary Effluent of Wastewater Treatment Plants By Fe(0) and Pd-Cu/γ-Al2O3." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 73, no. 11, 2016, pp. 2697-703.
Yun Y, Li Z, Chen YH, et al. Catalytic reduction of nitrate in secondary effluent of wastewater treatment plants by Fe(0) and Pd-Cu/γ-Al2O3. Water Sci Technol. 2016;73(11):2697-703.
Yun, Y., Li, Z., Chen, Y. H., Saino, M., Cheng, S., & Zheng, L. (2016). Catalytic reduction of nitrate in secondary effluent of wastewater treatment plants by Fe(0) and Pd-Cu/γ-Al2O3. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 73(11), pp. 2697-703. doi:10.2166/wst.2016.129.
Yun Y, et al. Catalytic Reduction of Nitrate in Secondary Effluent of Wastewater Treatment Plants By Fe(0) and Pd-Cu/γ-Al2O3. Water Sci Technol. 2016;73(11):2697-703. PubMed PMID: 27232406.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Catalytic reduction of nitrate in secondary effluent of wastewater treatment plants by Fe(0) and Pd-Cu/γ-Al2O3. AU - Yun,Yupan, AU - Li,Zifu, AU - Chen,Yi-Hung, AU - Saino,Mayiani, AU - Cheng,Shikun, AU - Zheng,Lei, PY - 2016/5/28/entrez PY - 2016/5/28/pubmed PY - 2016/9/23/medline SP - 2697 EP - 703 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci. Technol. VL - 73 IS - 11 N2 - Total nitrogen, in which NO3(-) is dominant in the effluent of most wastewater treatment plants, cannot meet the requirements of the Chinese wastewater discharge standard (<15 mg/L), making nitrate (NO3(-)) elimination attract considerable attention. In this study, reductant iron (Fe(0)) and γ-Al2O3 supported palladium-copper bimetallic catalysts (Pd-Cu/γ-Al2O3) were innovatively used for the chemical catalytic reduction of nitrate in wastewater. A series of specific operational conditions (such as mass ratio of Pd:Cu, catalyst amounts, reaction time and pH of solution) were optimized for nitrate reduction in the artificial solution, and then the selected optimal conditions were further applied for investigating the nitrate elimination of secondary effluent of a wastewater treatment plant in Beijing, China. Results indicated that a better catalytic performance (74% of nitrate removal and 62% of N2 selectivity) could be obtained under the optimal condition: 5 g/L Fe(0), 3:1 mass ratio (Pd:Cu), 4 g/L catalyst, 2 h reaction time and pH 5.1. It is noteworthy to point out that nitrogen gas (N2) predominated in the byproducts without another system to treat ammonium and nitrite. Therefore, the chemical catalytic reduction combining Fe(0) with Pd-Cu/γ-Al2O3 could be regarded as a better alternative for nitrate removal in wastewater treatment. SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/27232406/Catalytic_reduction_of_nitrate_in_secondary_effluent_of_wastewater_treatment_plants_by_Fe_0__and_Pd_Cu/γ_Al2O3_ L2 - https://iwaponline.com/wst/article-lookup/doi/10.2166/wst.2016.129 DB - PRIME DP - Unbound Medicine ER -