Microaerobic degradation of 2-Mercaptobenzothiazole present in industrial wastewater

Umamaheswari, B.; Rajaram, Rama

doi:10.1016/j.jhazmat.2016.09.061

Cited by 12 publications

(3 citation statements)

References 37 publications

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“…In the present study, we compared the degradation intermediates formed when MBT was degraded by Svi DyP (six different species, Table 4 ) with some of the products formed when MBT is degraded by either treatment method (including chemical methods and peroxidases with and without redox mediators). As summarized in Table 5 , all of the MBT degradation products we found have been previously reported in literature [ 24 , 44 , 45 , 46 , 47 ]. A summary of these intermediates is presented in Figure 7 , illustrating their potential structures as well as possible chemical reactions that could lead to their formation based on literature findings.…”

Section: Resultsmentioning

confidence: 55%

Efficient Degradation of 2-Mercaptobenzothiazole and Other Emerging Pollutants by Recombinant Bacterial Dye-Decolorizing Peroxidases

et al. 2021

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In recent years, concerns are being raised about the potential harmful effects of emerging pollutants (EPs) on human and aquatic lives. Extensive research is being conducted on developing efficient remediation strategies to target this new class of toxic pollutants. Studies focused on biological (enzyme-based) methods have shown potential as greener and possibly more economical alternatives to other treatment approaches, such as chemical methods. The current study focused on the use of recombinantly produced novel bacterial peroxidases, namely dye-decolorizing peroxidases (DyPs), to study their effectiveness in degrading a number of diverse EPs. In this context, a sensitive bioanalytical Liquid chromatography—tandem mass spectrometry (LCMSMS)-based method was developed to simultaneously detect a mixture of 31 EPs and to examine their degradability by a panel of seven different recombinant bacterial DyPs (rDyPs). We show that up to 9 of the 31 tested EPs could be degraded by at least one of the DyPs tested. The results also indicated that not all rDyPs behaved similarly in their abilities to degrade EPs, as some rDyPs (such as SviDyP and CboDyP) showed a promising potential to degrade EPs while others (such as ScDyP) were almost ineffective. Additionally, the role of redox mediators for effective emerging pollutant degradation by rDyPs was also examined, which showed dramatic improvement in the DyP-mediated degradation of five different EPs. Detailed analysis of 2-mercaptobenzothiazole degradation by SviDyP showed that six distinct breakdown products were generated. The present study showed for the first time that recombinant bacterial DyPs can be used for wastewater remediation by degrading a range of different EPs.

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Section: Resultsmentioning

confidence: 55%

Efficient Degradation of 2-Mercaptobenzothiazole and Other Emerging Pollutants by Recombinant Bacterial Dye-Decolorizing Peroxidases

et al. 2021

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“… ,, These results suggest that some BTHs are formed from precursors in the wastewater treatment process. For instance, 2-mercaptobenzothiazole (not analyzed in this study), a widely used vulcanization accelerator, can be degraded by microorganisms to produce BTH, 2-OH-BTH, 2-MeS-BTH, and 2-NH 2 -BTH . Furthermore, the conjugated metabolites of BTHs excreted in urine may break down during the wastewater treatment process, contributing to higher concentrations in effluents than in influents.…”

Section: Resultsmentioning

confidence: 99%

“…For instance, 2-mercaptobenzothiazole (not analyzed in this study), a widely used vulcanization accelerator, can be degraded by microorganisms to produce BTH, 2-OH-BTH, 2-MeS-BTH, and 2-NH 2 -BTH. 56 Furthermore, the conjugated metabolites of BTHs excreted in urine may break down during the wastewater treatment process, contributing to higher concentrations in effluents than in influents. Nevertheless, an earlier study reported a removal efficiency of 87% for BTHs in industrial wastewater, using a membrane reactor.…”

Section: Mass Loading and Environmental Emissionmentioning

confidence: 99%

Mass Loading, Removal, and Emission of 1,3-Diphenylguanidine, Benzotriazole, Benzothiazole, N-(1,3-Dimethylbutyl)-N′-phenyl-p-phenylenediamine, and Their Derivatives in a Wastewater Treatment Plant in New York State, USA

Li,

Kannan

2024

ACS EST Water

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1,3-Diphenylguanidine and derivatives (DPGs), benzotriazole and derivatives (BTRs), benzothiazole and derivatives (BTHs), N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine (6PPD), and 6PPD-quinone (6PPD-Q) are rubber additives that are toxic to aquatic organisms. Little is known about their occurrence and fate in wastewater treatment plants (WWTPs) in the United States. We measured the concentrations of 3 DPGs, 7 BTRs, 5 BTHs, 6PPD, and 6PPD-Q in wastewater influent, effluent, suspended particulate matter (SPM), and sludge collected from a WWTP in New York State. Among the four chemical classes analyzed, BTRs were the most predominant in wastewater (median concentration: 6210 and 4380 ng/L in the influent and effluent, respectively), followed by BTHs (184 and 227 ng/L, respectively), DPGs (89.3 and 103 ng/L, respectively), and 6PPDs (17.8 and 8.52 ng/L, respectively). The estimated median mass loadings of DPGs, BTRs, BTHs, and 6PPDs were 77.4, 5330, 165, and 22.7 mg/day/1000 inhabitants, respectively, whereas the corresponding emission rates were 89.9, 3760, 201, and 22.2 mg/day/1000 inhabitants. The removal efficiencies of DPGs, BTRs, BTHs, and 6PPDs in the WWTP were −23.8, 30.9, −76.4, and 29.9%, respectively, indicating ineffective removal during the treatment process. The estimated risk quotients of these chemicals to aquatic organisms through effluent discharge were below 0.1. Further studies are warranted regarding their ecological risks from long-term exposure.

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Microbial remediation of tannery wastewater

Kumar

Khushbu

Chugh

et al. 2022

Development in Wastewater Treatment Research and Processes

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Microaerobic degradation of 2-Mercaptobenzothiazole present in industrial wastewater

Cited by 12 publications

References 37 publications

Efficient Degradation of 2-Mercaptobenzothiazole and Other Emerging Pollutants by Recombinant Bacterial Dye-Decolorizing Peroxidases

Efficient Degradation of 2-Mercaptobenzothiazole and Other Emerging Pollutants by Recombinant Bacterial Dye-Decolorizing Peroxidases

Mass Loading, Removal, and Emission of 1,3-Diphenylguanidine, Benzotriazole, Benzothiazole, N-(1,3-Dimethylbutyl)-N′-phenyl-p-phenylenediamine, and Their Derivatives in a Wastewater Treatment Plant in New York State, USA

Microbial remediation of tannery wastewater

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