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Inhibition or promotion of biodegradation of nitrate by Paracoccus sp. in the presence of nanoscale zero-valent iron.
Sci Total Environ. 2015 Oct 15; 530-531:241-246.ST

Abstract

To investigate the effect of nanoscale zero-valent iron (nZVI) on the growth of Paracoccus sp. strain and biodenitrification under aerobic conditions, specific factors were studied, pH, concentration of nitrate, Fe (II) and carbon dioxide. Low concentration of nZVI (50mg/L) promoted both cell growth and biodegradation of nitrate which rose from 69.91% to 76.16%, while nitrate removal fell to 67.10% in the presence of high nZVI concentration (1000 mg/L). This may be attributed to the ions produced in nZVI corrosion being used as an electron source for the biodegradation of nitrate. However, the excess uptake of Fe (II) causes oxidative damage to the cells. To confirm this, nitrate was completely removed after 20 h when 100mg/L Fe (II) was added to the solution, which is much faster than the control (86.05%, without adding Fe (II)). However, nitrate removal reached only 45.64% after 20 h, with low cell density (OD 600=0.62) in the presence of 300 mg/L Fe (II). Characterization techniques indicated that nZVI adhered to microorganism cell membranes. These findings confirmed that nZVI could affect the activity of the strain and consequently change the biodenitrification.

Authors+Show Affiliations

School of Life Science, Fujian Normal University, Fuzhou 350108, Fujian Province, China.School of Life Science, Fujian Normal University, Fuzhou 350108, Fujian Province, China.Centre for Environmental Risk Assessment and Remediation, University of South Australia, Mawson Lakes, SA 5095, Australia.Centre for Environmental Risk Assessment and Remediation, University of South Australia, Mawson Lakes, SA 5095, Australia.School of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, Fujian Province, China; Centre for Environmental Risk Assessment and Remediation, University of South Australia, Mawson Lakes, SA 5095, Australia. Electronic address: Zuliang.chen@unisa.edu.au.

Pub Type(s)

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

Language

eng

PubMed ID

26047857

Citation

Jiang, Chenghong, et al. "Inhibition or Promotion of Biodegradation of Nitrate By Paracoccus Sp. in the Presence of Nanoscale Zero-valent Iron." The Science of the Total Environment, vol. 530-531, 2015, pp. 241-246.
Jiang C, Xu X, Megharaj M, et al. Inhibition or promotion of biodegradation of nitrate by Paracoccus sp. in the presence of nanoscale zero-valent iron. Sci Total Environ. 2015;530-531:241-246.
Jiang, C., Xu, X., Megharaj, M., Naidu, R., & Chen, Z. (2015). Inhibition or promotion of biodegradation of nitrate by Paracoccus sp. in the presence of nanoscale zero-valent iron. The Science of the Total Environment, 530-531, 241-246. https://doi.org/10.1016/j.scitotenv.2015.05.044
Jiang C, et al. Inhibition or Promotion of Biodegradation of Nitrate By Paracoccus Sp. in the Presence of Nanoscale Zero-valent Iron. Sci Total Environ. 2015 Oct 15;530-531:241-246. PubMed PMID: 26047857.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Inhibition or promotion of biodegradation of nitrate by Paracoccus sp. in the presence of nanoscale zero-valent iron. AU - Jiang,Chenghong, AU - Xu,Xuping, AU - Megharaj,Mallavarapu, AU - Naidu,Ravendra, AU - Chen,Zuliang, Y1 - 2015/06/02/ PY - 2015/01/25/received PY - 2015/05/13/revised PY - 2015/05/13/accepted PY - 2015/6/7/entrez PY - 2015/6/7/pubmed PY - 2015/12/15/medline KW - Biodenitrification KW - Cell growth KW - Nanotoxicity KW - Paracoccus sp. KW - nZVI SP - 241 EP - 246 JF - The Science of the total environment JO - Sci. Total Environ. VL - 530-531 N2 - To investigate the effect of nanoscale zero-valent iron (nZVI) on the growth of Paracoccus sp. strain and biodenitrification under aerobic conditions, specific factors were studied, pH, concentration of nitrate, Fe (II) and carbon dioxide. Low concentration of nZVI (50mg/L) promoted both cell growth and biodegradation of nitrate which rose from 69.91% to 76.16%, while nitrate removal fell to 67.10% in the presence of high nZVI concentration (1000 mg/L). This may be attributed to the ions produced in nZVI corrosion being used as an electron source for the biodegradation of nitrate. However, the excess uptake of Fe (II) causes oxidative damage to the cells. To confirm this, nitrate was completely removed after 20 h when 100mg/L Fe (II) was added to the solution, which is much faster than the control (86.05%, without adding Fe (II)). However, nitrate removal reached only 45.64% after 20 h, with low cell density (OD 600=0.62) in the presence of 300 mg/L Fe (II). Characterization techniques indicated that nZVI adhered to microorganism cell membranes. These findings confirmed that nZVI could affect the activity of the strain and consequently change the biodenitrification. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/26047857/Inhibition_or_promotion_of_biodegradation_of_nitrate_by_Paracoccus_sp__in_the_presence_of_nanoscale_zero_valent_iron_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(15)30102-9 DB - PRIME DP - Unbound Medicine ER -