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Coupling of biostimulation and bioaugmentation for enhanced bioremoval of chloroethylenes and BTEX from clayey soil
Ecotoxicology ( IF 2.7 ) Pub Date : 2021-01-07 , DOI: 10.1007/s10646-020-02323-z
Junhui Li 1 , Qihong Lu 2, 3 , Emmanuel Alepu Odey 2 , Keng Seng Lok 2 , Bingcai Pan 4 , Yanyang Zhang 4 , Hojae Shim 2
Affiliation  

The bioremoval potential of Pseudomonas plecoglossicida toward mixed contaminants was explored through the coupled biostimulation and bioaugmentation in soil microcosm. Response surface methodology was employed to optimize nutrients and innoculum size for the cometabolic removal of two representative chloroethylenes, trichloroethylene (TCE) and cis-1,2-dichloroethylene (cis-DCE), mixed with benzene, toluene, ethylbenzene, and xylenes (BTEX). The interactive effects of nutrients [nitrogen (N) and phosphorus (P)] and inoculum size toward the bioremoval of mixture of BTEX (600 mg kg1), cis-DCE (10 mg kg1), and TCE (10 mg kg−1) were estimated using principal component analysis and two-dimensional hierarchical cluster analysis. The optimal condition was confirmed with C:N:P ratio of 100:26.7:1.8–4.8 and higher inoculum size (≥25%), where 97.7% of benzene, 98.3% of toluene, 91.2% of ethylbenzene, 45.6% of m,p-xylene, 31.2% of o-xylene, 26.9% of cis-DCE, and 33.5% of TCE were bioremoved.



中文翻译:

生物刺激和生物强化相结合,以增强从粘质土壤中生物去除氯乙烯和 BTEX

通过土壤微观世界中的耦合生物刺激和生物强化,探索了假单胞菌对混合污染物的生物去除潜力。响应面方法用于优化营养物质和接种物大小,用于去除与苯、甲苯、乙苯和二甲苯 (BTEX) 混合的两种代表性氯乙烯,三氯乙烯 (TCE)和顺式-1,2-二氯乙烯 ( cis -DCE) )。营养物质 [氮 (N) 和磷 (P)] 和接种物大小对 BTEX (600 mg kg - 1 )、顺式-DCE (10 mg kg - 1 ) 和 TCE (10 mg)混合物的生物去除的交互作用公斤-1) 使用主成分分析和二维层次聚类分析进行估计。最佳条件确定为 C:N:P 比为 100:26.7:1.8-4.8 和更高的接种量(≥25%),其中苯 97.7%、甲苯 98.3%、乙苯 91.2%、m 45.6%二甲苯、31.2% 的二甲苯、26.9% 的顺式-DCE 和 33.5% 的 TCE 被生物去除。

更新日期:2021-01-07
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