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Title: Anaerobic removal of pentachlorophenol in presence of zinc

Abstract

The objective of this research was to determine the toxic effects and degradation of pentachlorophenol (PCP) in the presence of zinc in anaerobic propionate systems. Anaerobic toxicity assays (ATA), batch kinetic studies, and biodegradation studies were performed using serum bottles. PCP inhibition was modeled using both uncompetitive and noncompetitive inhibition kinetic models with an inhibition coefficient, K{sub I}, of 0.06 mg/L. Zinc toxicity showed that the competitive inhibition model was the best-fit with a K{sub I} of 1.1 mg/L. A combined competitive-uncompetitive inhibition model was the best-fit model in the presence of both PCP and zinc for propionate degradation. In the biodegradation studies, PCP removals were 72, 64, and 54% with spiked PCP concentrations of 2, 3, and 5 mg/L, respectively. In the presence of zinc, the removal of 2 mg/L and 3 mg/L of PCP decreased to 60% and 53%, respectively. The intermediates of PCP degradation were 2,4,6-trichlorophenol, 2,4-dichlorophenol, 4-chlorophenol, 2,3,5-trichlorophenol, 3,5-dichlorophenol, and 3-chlorophenol; lower concentrations of these intermediates were observed in the presence of zinc.

Authors:
;  [1]
  1. Tulane Univ., New Orleans, LA (United States). Dept. of Civil and Environmental Engineering
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
267985
Resource Type:
Journal Article
Journal Name:
Journal of Environmental Engineering
Additional Journal Information:
Journal Volume: 122; Journal Issue: 7; Other Information: PBD: Jul 1996
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 56 BIOLOGY AND MEDICINE, APPLIED STUDIES; WASTE WATER; WASTE PROCESSING; CHLORINATED AROMATIC HYDROCARBONS; BIODEGRADATION; ZINC; TOXICITY; WATER POLLUTION ABATEMENT; ANAEROBIC CONDITIONS

Citation Formats

Jin, P, and Bhattacharya, S K. Anaerobic removal of pentachlorophenol in presence of zinc. United States: N. p., 1996. Web. doi:10.1061/(ASCE)0733-9372(1996)122:7(590).
Jin, P, & Bhattacharya, S K. Anaerobic removal of pentachlorophenol in presence of zinc. United States. https://doi.org/10.1061/(ASCE)0733-9372(1996)122:7(590)
Jin, P, and Bhattacharya, S K. 1996. "Anaerobic removal of pentachlorophenol in presence of zinc". United States. https://doi.org/10.1061/(ASCE)0733-9372(1996)122:7(590).
@article{osti_267985,
title = {Anaerobic removal of pentachlorophenol in presence of zinc},
author = {Jin, P and Bhattacharya, S K},
abstractNote = {The objective of this research was to determine the toxic effects and degradation of pentachlorophenol (PCP) in the presence of zinc in anaerobic propionate systems. Anaerobic toxicity assays (ATA), batch kinetic studies, and biodegradation studies were performed using serum bottles. PCP inhibition was modeled using both uncompetitive and noncompetitive inhibition kinetic models with an inhibition coefficient, K{sub I}, of 0.06 mg/L. Zinc toxicity showed that the competitive inhibition model was the best-fit with a K{sub I} of 1.1 mg/L. A combined competitive-uncompetitive inhibition model was the best-fit model in the presence of both PCP and zinc for propionate degradation. In the biodegradation studies, PCP removals were 72, 64, and 54% with spiked PCP concentrations of 2, 3, and 5 mg/L, respectively. In the presence of zinc, the removal of 2 mg/L and 3 mg/L of PCP decreased to 60% and 53%, respectively. The intermediates of PCP degradation were 2,4,6-trichlorophenol, 2,4-dichlorophenol, 4-chlorophenol, 2,3,5-trichlorophenol, 3,5-dichlorophenol, and 3-chlorophenol; lower concentrations of these intermediates were observed in the presence of zinc.},
doi = {10.1061/(ASCE)0733-9372(1996)122:7(590)},
url = {https://www.osti.gov/biblio/267985}, journal = {Journal of Environmental Engineering},
number = 7,
volume = 122,
place = {United States},
year = {Mon Jul 01 00:00:00 EDT 1996},
month = {Mon Jul 01 00:00:00 EDT 1996}
}