当前位置: X-MOL 学术Ecotox. Environ. Saf. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Enhanced bioremediation of lindane-contaminated soils through microbial bioaugmentation assisted by biostimulation with sugarcane filter cake.
Ecotoxicology and Environmental Safety ( IF 6.8 ) Pub Date : 2020-01-06 , DOI: 10.1016/j.ecoenv.2019.110143
Enzo E Raimondo 1 , Juan D Aparicio 1 , Ana L Bigliardo 2 , María S Fuentes 2 , Claudia S Benimeli 3
Affiliation  

Lindane is a toxic and persistent organochlorine pesticide, whose extensive use generated its accumulation in different environmental matrices. Bioremediation is a promising technology that can be used combining bioaugmentation and biostimulation processes to soil restoration. The aim of the present work was to determine the conditions of maximum lindane removal by bioaugmentation with an actinobacteria consortium and biostimulation with sugarcane filter cake (SCFC). The assays were carried out on lindane-contaminated silty loam (SLS), clayey (CS), and sandy (SS) soils. Through complete factorial designs, the effects of three abiotic factors (moisture content, proportion and size of SCFC particles) were evaluated on lindane removal. In addition, a response optimizer determined the optimal conditions for pesticide removal in bioaugmented and biostimulated soils, in the range of levels studied for each factor. In these conditions, bioaugmentation of biostimulated soils increased the pesticide removal (SLS: 61.4%, CS: 70.8%, SS: 86.3%), heterotrophic microbial counts, and soil enzymatic activities, and decreased lindane T1/2, regarding the non-bioaugmented biostimulated controls, after 14 days of assay. The values of these parameters confirmed the efficiency of the bioremediation process. Finally, the viability of the four strains was demonstrated at the end of the assay. The results indicate that the simultaneous application of bioaugmentation with the actinobacteria consortium and biostimulation with SCFC constitutes a promising tool for restoring soils contaminated with lindane, by using the optimal conditions obtained through the factorial designs.

中文翻译:

通过甘蔗滤饼的生物刺激辅助的微生物生物增强作用,增强了林丹污染土壤的生物修复。

林丹是一种有毒且持久的有机氯农药,其广泛使用导致其在不同环境基质中的积累。生物修复是一种有前途的技术,可以将生物增强和生物刺激过程结合起来用于土壤修复。本工作的目的是确定通过放线菌菌群的生物增强和甘蔗滤饼(SCFC)的生物刺激来最大程度去除林丹的条件。该测定是在受林丹污染的粉质壤土(SLS),黏土(CS)和沙质(SS)土壤上进行的。通过完整的因子设计,评估了三种非生物因子(水分,SCFC颗粒的比例和大小)对林丹去除效果的影响。此外,响应优化器确定了在生物强化和生物刺激性土壤中去除农药的最佳条件,该条件在每个因素研究的水平范围内。在这种情况下,生物刺激性土壤的生物强化提高了除草剂的去除率(SLS:61.4%,CS:70.8%,SS:86.3%),异养微生物数量和土壤酶活性,而林丹的T1 / 2降低了。检测14天后,进行生物刺激的对照。这些参数的值证实了生物修复过程的效率。最后,在测定结束时证明了四种菌株的生存力。结果表明,放线菌联合体同时进行生物增强和SCFC进行生物刺激,是恢复林丹污染土壤的有前途的工具,
更新日期:2020-01-07
down
wechat
bug