The kinetic reaction of anaerobic microbial chloerobenzenes degradation in contaminated soil
The kinetic reactions of hexachlorobenzene (HCB) and coexisting chlorobenzene congeners in real HCB-contaminated soil and effects of environmental factors on degradation rate, such as solid-liquid ratio, pH and incubation temperatures, were investigated. The Monod model was adopted for the kinetic s...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Chemical Engineering Journal Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666821122001740 |
| _version_ | 1811315760247603200 |
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| author | Yaling Wang Guoao Li Qi Wang Xue Chen Chengyi Sun |
| author_facet | Yaling Wang Guoao Li Qi Wang Xue Chen Chengyi Sun |
| author_sort | Yaling Wang |
| collection | DOAJ |
| description | The kinetic reactions of hexachlorobenzene (HCB) and coexisting chlorobenzene congeners in real HCB-contaminated soil and effects of environmental factors on degradation rate, such as solid-liquid ratio, pH and incubation temperatures, were investigated. The Monod model was adopted for the kinetic study and the related kinetic parameters were evaluated. The Monod model showed good fitness for HCB degradation, not for coexisting chlorobenzene congeners. For pentachlorobenzene (PeCB), 1,2,4,5-tetrachlorobenzene(1,2,4,5-TeCB) and 1,2,4-trichlorobenzene(1,2,4-TCB), the calculated value of average degradation rate may not be “positive” or “negative” invariably, depending on production and degradation of these halogenated organic compounds. For HCB, a maximum degradation rate constant of 0.0359 d−1 and half-life time of 19.3 d were achieved, respectively. The hydrogen ion played the most important role in degradation of four chlorobenzenes. However, this role could be weakened if the solubility of compound was considered. Also, the results showed that the initial weak acid to neutral pH (5 – 7) environment with the incubation temperature of 45 °C was favorable for the rapid kinetic degradation of chlorobenzenes and the removal of chlorobenzenes was evaluated to reach 46%. This study offers direct kinetic behaviors and environmental factors analysis of the biodegradation process of HCB and coexisting chlorobenzene congeners, and is beneficial to explored the potential of optimized anaerobic microbial degradation for remediation engineering of chlorobenzenes contained soil. |
| first_indexed | 2024-04-13T11:35:54Z |
| format | Article |
| id | doaj.art-19ab37ca02074fefa4eab6fc8a1a028a |
| institution | Directory Open Access Journal |
| issn | 2666-8211 |
| language | English |
| last_indexed | 2024-04-13T11:35:54Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chemical Engineering Journal Advances |
| spelling | doaj.art-19ab37ca02074fefa4eab6fc8a1a028a2022-12-22T02:48:26ZengElsevierChemical Engineering Journal Advances2666-82112022-11-0112100414The kinetic reaction of anaerobic microbial chloerobenzenes degradation in contaminated soilYaling Wang0Guoao Li1Qi Wang2Xue Chen3Chengyi Sun4Beijing Municipal Research Institute of Eco-Environmental Protection, Beijing 100037, ChinaBeijing Municipal Research Institute of Eco-Environmental Protection, Beijing 100037, ChinaCorresponding author.; Beijing Municipal Research Institute of Eco-Environmental Protection, Beijing 100037, ChinaBeijing Municipal Research Institute of Eco-Environmental Protection, Beijing 100037, ChinaBeijing Municipal Research Institute of Eco-Environmental Protection, Beijing 100037, ChinaThe kinetic reactions of hexachlorobenzene (HCB) and coexisting chlorobenzene congeners in real HCB-contaminated soil and effects of environmental factors on degradation rate, such as solid-liquid ratio, pH and incubation temperatures, were investigated. The Monod model was adopted for the kinetic study and the related kinetic parameters were evaluated. The Monod model showed good fitness for HCB degradation, not for coexisting chlorobenzene congeners. For pentachlorobenzene (PeCB), 1,2,4,5-tetrachlorobenzene(1,2,4,5-TeCB) and 1,2,4-trichlorobenzene(1,2,4-TCB), the calculated value of average degradation rate may not be “positive” or “negative” invariably, depending on production and degradation of these halogenated organic compounds. For HCB, a maximum degradation rate constant of 0.0359 d−1 and half-life time of 19.3 d were achieved, respectively. The hydrogen ion played the most important role in degradation of four chlorobenzenes. However, this role could be weakened if the solubility of compound was considered. Also, the results showed that the initial weak acid to neutral pH (5 – 7) environment with the incubation temperature of 45 °C was favorable for the rapid kinetic degradation of chlorobenzenes and the removal of chlorobenzenes was evaluated to reach 46%. This study offers direct kinetic behaviors and environmental factors analysis of the biodegradation process of HCB and coexisting chlorobenzene congeners, and is beneficial to explored the potential of optimized anaerobic microbial degradation for remediation engineering of chlorobenzenes contained soil.http://www.sciencedirect.com/science/article/pii/S2666821122001740KineticsAnaerobic microbial degradationHexachlorobenzeneChlorobenzenes |
| spellingShingle | Yaling Wang Guoao Li Qi Wang Xue Chen Chengyi Sun The kinetic reaction of anaerobic microbial chloerobenzenes degradation in contaminated soil Chemical Engineering Journal Advances Kinetics Anaerobic microbial degradation Hexachlorobenzene Chlorobenzenes |
| title | The kinetic reaction of anaerobic microbial chloerobenzenes degradation in contaminated soil |
| title_full | The kinetic reaction of anaerobic microbial chloerobenzenes degradation in contaminated soil |
| title_fullStr | The kinetic reaction of anaerobic microbial chloerobenzenes degradation in contaminated soil |
| title_full_unstemmed | The kinetic reaction of anaerobic microbial chloerobenzenes degradation in contaminated soil |
| title_short | The kinetic reaction of anaerobic microbial chloerobenzenes degradation in contaminated soil |
| title_sort | kinetic reaction of anaerobic microbial chloerobenzenes degradation in contaminated soil |
| topic | Kinetics Anaerobic microbial degradation Hexachlorobenzene Chlorobenzenes |
| url | http://www.sciencedirect.com/science/article/pii/S2666821122001740 |
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