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Nitrate removal by Fe0/Pd/Cu nano-composite in groundwater.
Environ Technol. 2014 Mar-Apr; 35(5-8):917-24.ET

Abstract

Nitrate pollution in groundwater shows a great threat to the safety of drinking water. Chemical reduction by zero-valent iron is being considered as a promising technique for nitrate removal from contaminated groundwater. In this paper, Fe0/Pd/Cu nano-composites were prepared by the liquid-phase reduction method, and batch experiments of nitrate reduction by the prepared Fe0/Pd/Cu nano-composites under various operating conditions were carried out. It has been found that nano-Fe0/Pd/Cu composites processed dual functions: catalytic reduction and chemical reduction. The introduction of Pd and Cu not only improved nitrate removal rate, but also reduced the generation of ammonia. Nitrate removal rate was affected by the amount of Fe0/Pd/Cu, initial nitrate concentration, solution pH, dissolved oxygen (DO), reaction temperature, the presence of anions, and organic pollutant. Moreover, nitrate reduction by Fe0/Pd/Cu composites followed the pseudo-first-order reaction kinetics. The removal rate of nitrate and total nitrogen were about 85% and 40.8%, respectively, under the reaction condition of Fe-6.0%Pd-3.0%Cu amount of 0.25 g/L, pH value of 7.1, DO of 0.42 mg/L, and initial nitrate concentration of 100 mg/L. Compared with the previous studies with Fe0 alone or Fe-Cu, nano-Fe-6%Pd-3%Cu composites showed a better selectivity to N2.

Authors

No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

24645474

Citation

Liu, Hongyuan, et al. "Nitrate Removal By Fe0/Pd/Cu Nano-composite in Groundwater." Environmental Technology, vol. 35, no. 5-8, 2014, pp. 917-24.
Liu H, Guo M, Zhang Y. Nitrate removal by Fe0/Pd/Cu nano-composite in groundwater. Environ Technol. 2014;35(5-8):917-24.
Liu, H., Guo, M., & Zhang, Y. (2014). Nitrate removal by Fe0/Pd/Cu nano-composite in groundwater. Environmental Technology, 35(5-8), 917-24.
Liu H, Guo M, Zhang Y. Nitrate Removal By Fe0/Pd/Cu Nano-composite in Groundwater. Environ Technol. 2014 Mar-Apr;35(5-8):917-24. PubMed PMID: 24645474.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Nitrate removal by Fe0/Pd/Cu nano-composite in groundwater. AU - Liu,Hongyuan, AU - Guo,Min, AU - Zhang,Yan, PY - 2014/3/21/entrez PY - 2014/3/22/pubmed PY - 2014/4/11/medline SP - 917 EP - 24 JF - Environmental technology JO - Environ Technol VL - 35 IS - 5-8 N2 - Nitrate pollution in groundwater shows a great threat to the safety of drinking water. Chemical reduction by zero-valent iron is being considered as a promising technique for nitrate removal from contaminated groundwater. In this paper, Fe0/Pd/Cu nano-composites were prepared by the liquid-phase reduction method, and batch experiments of nitrate reduction by the prepared Fe0/Pd/Cu nano-composites under various operating conditions were carried out. It has been found that nano-Fe0/Pd/Cu composites processed dual functions: catalytic reduction and chemical reduction. The introduction of Pd and Cu not only improved nitrate removal rate, but also reduced the generation of ammonia. Nitrate removal rate was affected by the amount of Fe0/Pd/Cu, initial nitrate concentration, solution pH, dissolved oxygen (DO), reaction temperature, the presence of anions, and organic pollutant. Moreover, nitrate reduction by Fe0/Pd/Cu composites followed the pseudo-first-order reaction kinetics. The removal rate of nitrate and total nitrogen were about 85% and 40.8%, respectively, under the reaction condition of Fe-6.0%Pd-3.0%Cu amount of 0.25 g/L, pH value of 7.1, DO of 0.42 mg/L, and initial nitrate concentration of 100 mg/L. Compared with the previous studies with Fe0 alone or Fe-Cu, nano-Fe-6%Pd-3%Cu composites showed a better selectivity to N2. SN - 0959-3330 UR - https://www.unboundmedicine.com/medline/citation/24645474/Nitrate_removal_by_Fe0/Pd/Cu_nano_composite_in_groundwater_ L2 - http://www.tandfonline.com/doi/full/10.1080/09593330.2013.856926 DB - PRIME DP - Unbound Medicine ER -