Hybrid biological, electron beam and zero-valent nano iron treatment of recalcitrant metalworking fluids.

Hybrid biological, electron beam and zero-valent nano iron treatment of recalcitrant metalworking fluids.
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顽固金属加工液的混合生物、电子束和零价纳米铁处理。

DOI:
10.1016/j.watres.2016.02.028
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发表时间:
2016
期刊:
影响因子:
12.8
通讯作者:
Thill PG
Thill PG
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
Thill PG

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研究了有毒难降解工业废水的复合修复和解毒方法。重点是废金属加工液,它被选为其他有毒、顽固和需要更可持续的安全处置途径的废液的代表模型。混合方法包括生物降解、电子束照射和零价纳米铁高级氧化工艺,这些工艺分别采用析因设计并按顺序采用。为了比较工艺性能,比较了操作耗尽的金属加工液和纯净的金属加工液。顺序混合电子束照射、生物、纳米零价铁和生物处理导致了两种顽固水流的协同解毒和降解,由互补替代品确定,并导致总体COD去除从原始金属加工液的85.9%±33.4%提高到92.8%±71.4%。电子束前处理使生物处理效果更好,COD值分别为69.5%±28.8%(p=0.005)和24.6%±44.8%(p=0.044)。
Hybrid approaches for the remediation and detoxification of toxic recalcitrant industrial wastewater were investigated. The focus was waste metalworking fluid, which was selected as a representative model of other waste streams that are toxic, recalcitrant and that require more sustainable routes of safe disposal. The hybrid approaches included biodegradation, electron beam irradiation and zero-valent nano iron advanced oxidation processes that were employed individually and in sequence employing a factorial design. To compare process performance operationally exhausted and pristine metalworking fluid were compared. Sequential hybrid electron beam irradiation, biological, nanoscale zero-valent iron and biological treatment lead to synergistic detoxification and degradation of both recalcitrant streams, as determined by complementary surrogates and lead to overall improved COD removal of 92.8 ± 1.4% up from 85.9 ± 3.4% for the pristine metalworking fluid. Electron beam pre-treatment enabled more effective biotreatment, achieving 69.5 ± 8% (p = 0.005) and 24.6 ± 4.8% (p = 0.044) COD reductions.
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