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Treatment of textile wastewater containing mixed toxic azo dye and chromium (VI) BY haloalkaliphilic bacterial consortium
Chemosphere ( IF 8.1 ) Pub Date : 2021-09-21 , DOI: 10.1016/j.chemosphere.2021.132280
Leena Merlin Biju 1 , V Pooshana 2 , P Senthil Kumar 3 , K Veena Gayathri 2 , Sabah Ansar 4 , Saravanan Govindaraju 5
Affiliation  

Scientific empowerment in this century created a positive and negative impact on the ecosystem's biotic and abiotic components. The current scenario of emerging recalcitrant pollutants in the environment is encountered using various remediation approaches are enforced and applied. The need for mineralization of the toxic pollutants to non - toxic forms accomplished the application of microbes (bacteria, fungi and algae) and plants individually or in a combined manner. The current research on the removal of pollutants from synthetic textile wastewater containing 1200 ppm concentration of mixed azo dyes –Reactive red (RR), Reactive Brown (RB) & Reactive Black (RBl) and 300 ppm Cr (VI) metal using haloalkaliphilic bacterial strains LBKVG1, LBKVG2, LBKVG3 & LBKVG4 in a Moving Bed Biofilm Reactor (MBBR), showed decolorization of 82 ± 0.5% of mixed azo dyes and degradation 56 ± 0.5% of Cr (VI) metal at 37 °C and pH 8.5 in the fifth day of the study. The isolated bacterial strains in the consortium were molecularly and morphologically characterized by 16SrRNA sequencing and SEM analysis. FT-IR and GC-MS analysis scrutinized the metabolites obtained. The findings suggest the degradation of hazardous pollutants even at higher concentrations and attempt to decolourize the mixed azo dyes simultaneously using the eco-friendly bacterial consortium.



中文翻译:

卤化嗜碱菌聚生体处理含有混合有毒偶氮染料和铬(VI)的纺织废水

本世纪的科学赋权对生态系统的生物和非生物成分产生了积极和消极的影响。当前环境中出现顽固性污染物的情况是使用各种修复方法被强制执行和应用。将有毒污染物矿化成无毒形式的需要完成了微生物(细菌、真菌和藻类)和植物单独或以组合方式的应用。使用卤代碱性细菌菌株去除含有 1200 ppm 混合偶氮染料 – 活性红 (RR)、活性棕 (RB) 和活性黑 (RBl) 和 300 ppm Cr (VI) 金属的合成纺织废水污染物的当前研究LBKVG1、LBKVG2、LBKVG3 和 LBKVG4 在移动床生物膜反应器 (MBBR) 中的脱色度为 82 ± 0。 在研究的第五天,° C 和 pH 值为 8.5。通过 16SrRNA 测序和 SEM 分析对聚生体中分离的细菌菌株进行分子和形态学表征。FT-IR 和 GC-MS 分析仔细检查了获得的代谢物。研究结果表明,即使在更高浓度下,有害污染物也会降解,并尝试使用环保细菌聚生体同时对混合偶氮染料进行脱色。

更新日期:2021-09-24
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