Fabrication, characterizations and performance of a high-efficiency micro-electrolysis filler for isobutyl xanthate (IBX) degradation.
Fabrication, characterizations and performance of a high-efficiency micro-electrolysis filler for isobutyl xanthate (IBX) degradation.
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DOI：
10.1016/j.jhazmat.2020.123640
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发表时间：
2020-08
影响因子：
13.6
通讯作者：
Shuzhen Yang;Hui Sun;Shengpeng Su;Guihong Han;Yan-fang Huang
中科院分区：
文献类型：
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作者：
Shuzhen Yang;Hui Sun;Shengpeng Su;Guihong Han;Yan-fang Huang
微电解法是一种广泛应用于废水处理的经济有效的方法。采用焙烧法制备了高效微电解填料，用于降解异丁基黄药(IBX)。从抗压强度、磨损损失和降解率等方面研究了填料制备工艺的优化。结合多种表征技术可以发现，在处理过程中，铁铝石相(Fe2SiO4)中的零价铁(ZVI)部分转变为Fe(2+)。考察了填料投加量、初始pH、初始浓度等操作参数对处理效果的影响。结果表明，优化后的填料对IBX的降解率可达93.30%，优于Fe/C填料(Fe在热处理过程中保持在Zvi)的61.8%的降解率。用GC-MS对IBX的降解途径进行了详细的研究，推测其主要副产物为二(2-甲基丙基)碳酸酯。通过间歇循环试验和柱状试验评价了填料的稳定性。这项工作为微电解填料的制备提供了一个新的视角。超凡的性能为它的工业应用带来了潜力。
Micro-electrolysis is a cost-effective method widely applied in wastewater treatment. In this paper, a high-efficiency micro-electrolysis filler was prepared by a facile calcination method for the degradation of isobutyl xanthate (IBX). The optimization of filler fabrication process was investigated from aspects of compressive strength, abrasion loss and degradation rate. Combined with multi-characterization techniques, it can be found that the zero-valent iron (ZVI) was partially changed to Fe(2+) in the phase of fayalite (Fe2SiO4) during the treatment. The influence of operation parameters of filler dosage, initial pH and initial concentration were thoroughly studied. The result shows that the IBX degradation rate by optimized filler can reach 93.30%, superior to that of Fe/C filler (the element Fe kept at ZVI during heat treatment) with 61.8% removal. The degradation pathway of IBX was studied by GC-MS in details and the bis(2-methylpropyl)carbonate was postulated as the main by-product. The stability of filler was evaluated by batch cycle tests and column tests. This work provides a novel perspective about micro-electrolysis filler preparation. The extraordinary performance brings it potential for industrial application.