Inhibition and anaerobic biodegradation of benz[a]anthracene-7,12- dione via the specific methanogenic activity test

Aims: The purpose of this study was to determine the inhibition and anaerobic biodegradation of benz[a]anthracene-7, 12-dione (BaAQ) via the specific methanogenic activity (SMA) test. Materials and Methods: In this study, 120 mL vials were filled with given concentration of BaAQ, anaerobic biomass...

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Main Authors: Mohammad Mehdi Amin, Mehdi Hajian Nezhad, Marzieh Farhadkhani, Mahnaz Heidari, Fazel Mohammadi Moghadam
Format: Article
Language:English
Published: Wolters Kluwer Medknow Publications 2013-01-01
Series:International Journal of Environmental Health Engineering
Subjects:
Online Access:http://www.ijehe.org/article.asp?issn=2277-9183;year=2013;volume=2;issue=1;spage=8;epage=8;aulast=Amin
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author Mohammad Mehdi Amin
Mehdi Hajian Nezhad
Marzieh Farhadkhani
Mahnaz Heidari
Fazel Mohammadi Moghadam
author_facet Mohammad Mehdi Amin
Mehdi Hajian Nezhad
Marzieh Farhadkhani
Mahnaz Heidari
Fazel Mohammadi Moghadam
author_sort Mohammad Mehdi Amin
collection DOAJ
description Aims: The purpose of this study was to determine the inhibition and anaerobic biodegradation of benz[a]anthracene-7, 12-dione (BaAQ) via the specific methanogenic activity (SMA) test. Materials and Methods: In this study, 120 mL vials were filled with given concentration of BaAQ, anaerobic biomass and substrate. Each batch experiment was lasted 13 to 26 days. The inhibition effects of BaAQ with concentrations of 0.5, 5, 25, 50, 100, 250 and 500 mg/L on the methanogenic process was investigated in the presence of volatile fatty acids including acetic, butyric and propionic acids. Results: In some eatch test, the gas production was stopped after 13 days (312 h). Therefore, 312 h was considered as compared base of gas production. After this time, methane production cumulative rate was calculated for the each SMA. After 13 days (312 h) the lowest and the highest cumulative methane has been produced (per mL) at the presence of concentrations of 250 and 0.5 mg/L of BaAQ, respectively. Conclusion: The results of this study showed that the BaAQ with concentration of 250 mg/L has more inhibition effect on methane production rather than other concentrations (even of 500 mg/L). Therefore, we should not always expect that higher concentrations of toxic compounds had more inhibitory effects than low concentrations of them.
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spelling doaj.art-641f3f2ad23c4fdbb4f8c2525a17b7462022-12-22T01:42:36ZengWolters Kluwer Medknow PublicationsInternational Journal of Environmental Health Engineering2277-91832013-01-01218810.4103/2277-9183.107920Inhibition and anaerobic biodegradation of benz[a]anthracene-7,12- dione via the specific methanogenic activity testMohammad Mehdi AminMehdi Hajian NezhadMarzieh FarhadkhaniMahnaz HeidariFazel Mohammadi MoghadamAims: The purpose of this study was to determine the inhibition and anaerobic biodegradation of benz[a]anthracene-7, 12-dione (BaAQ) via the specific methanogenic activity (SMA) test. Materials and Methods: In this study, 120 mL vials were filled with given concentration of BaAQ, anaerobic biomass and substrate. Each batch experiment was lasted 13 to 26 days. The inhibition effects of BaAQ with concentrations of 0.5, 5, 25, 50, 100, 250 and 500 mg/L on the methanogenic process was investigated in the presence of volatile fatty acids including acetic, butyric and propionic acids. Results: In some eatch test, the gas production was stopped after 13 days (312 h). Therefore, 312 h was considered as compared base of gas production. After this time, methane production cumulative rate was calculated for the each SMA. After 13 days (312 h) the lowest and the highest cumulative methane has been produced (per mL) at the presence of concentrations of 250 and 0.5 mg/L of BaAQ, respectively. Conclusion: The results of this study showed that the BaAQ with concentration of 250 mg/L has more inhibition effect on methane production rather than other concentrations (even of 500 mg/L). Therefore, we should not always expect that higher concentrations of toxic compounds had more inhibitory effects than low concentrations of them.http://www.ijehe.org/article.asp?issn=2277-9183;year=2013;volume=2;issue=1;spage=8;epage=8;aulast=AminBenz[a]anthracene-712-dione (BaAQ)anaerobic biomassspecific methanogenic activity
spellingShingle Mohammad Mehdi Amin
Mehdi Hajian Nezhad
Marzieh Farhadkhani
Mahnaz Heidari
Fazel Mohammadi Moghadam
Inhibition and anaerobic biodegradation of benz[a]anthracene-7,12- dione via the specific methanogenic activity test
International Journal of Environmental Health Engineering
Benz[a]anthracene-7
12-dione (BaAQ)
anaerobic biomass
specific methanogenic activity
title Inhibition and anaerobic biodegradation of benz[a]anthracene-7,12- dione via the specific methanogenic activity test
title_full Inhibition and anaerobic biodegradation of benz[a]anthracene-7,12- dione via the specific methanogenic activity test
title_fullStr Inhibition and anaerobic biodegradation of benz[a]anthracene-7,12- dione via the specific methanogenic activity test
title_full_unstemmed Inhibition and anaerobic biodegradation of benz[a]anthracene-7,12- dione via the specific methanogenic activity test
title_short Inhibition and anaerobic biodegradation of benz[a]anthracene-7,12- dione via the specific methanogenic activity test
title_sort inhibition and anaerobic biodegradation of benz a anthracene 7 12 dione via the specific methanogenic activity test
topic Benz[a]anthracene-7
12-dione (BaAQ)
anaerobic biomass
specific methanogenic activity
url http://www.ijehe.org/article.asp?issn=2277-9183;year=2013;volume=2;issue=1;spage=8;epage=8;aulast=Amin
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