Removal of polyvinylamine sulfonate anthrapyridone dye by application of heterogeneous electro-Fenton process
Removal of polyvinylamine sulfonate anthrapyridone dye by application of heterogeneous electro-Fenton process
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DOI：
10.1007/s11356-017-9468-5
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发表时间：
2017-08-01
影响因子：
5.8
通讯作者：
Angeles Sanroman, Maria
中科院分区：
文献类型：
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作者：
Bouzayani, Bakhta;Meijide, Jessica;Angeles Sanroman, Maria
污染物的多样性和快速增殖促使人们改进传统的废水处理方法。通常面临的瓶颈之一是废水中存在结构复杂的有机污染物，这要求设计有效的工艺。因此，本文研究了传统技术难以降解的结构复杂的聚乙烯胺磺酸蒽吡啶酮（PSA）染料的脱除。为此，设计了以黄铁矿为可持续催化剂的非均相氧化工艺。首先，通过与掺硼金刚石泡沫镍体系进行对比，确定了bbd -碳毡体系分别作为阳极和阴极生产H2O2的性能。碳毡电极提供了最高的氧化剂产量，并被选择用于处理聚合染料。对几种氧化工艺进行了评价，得到了电fenton -黄铁矿氧化工艺的最佳降解水平。在黄铁矿最佳投加量为2 g/L、电流强度为200 mA的条件下，染料脱除符合准一级动力学模型，脱除效率最高。根据最佳实验条件，这些值导致6小时后几乎完全矿化（总有机碳去除率为95%）。此外，通过四个循环去除PSA来评估黄铁矿的可重复使用性。
Diversity and rapidly multiplication of the pollutants incite as to improve the conventional treatments wastewater methods. One of the bottlenecks often faced is the presence into wastewater of organic pollutants with complex structures that requests the design of efficient processes. Thus, this work investigates the removal of polyvinylamine sulfonate anthrapyridone (PSA) dye which complex structure makes difficult its degradation by conventional technologies. For that, a heterogeneous oxidative process using pyrite as sustainable catalyst was designed. Initially, the performance of the system BBD-carbon felt as anode and cathode, respectively for the production of H2O2 was determined in comparison with system boron-doped diamond nickel foam. The carbon felt electrode provided the highest oxidant production, and it was selected for the treatment of the polymeric dye. Several oxidative processes were evaluated, and the best degradation levels were obtained by application of electro-Fenton-pyrite process. In addition, it was determined that dye removal followed a kinetic model of pseudo-first-order achieving the highest efficiency by operation at optimum dosage of pyrite 2 g/L and 200 mA of current intensity. Depending on the optimal experimental conditions, these values lead to a nearly complete mineralization (total organic carbon removal of 95%) after 6 h. Furthermore, the reusability of pyrite was evaluated, by removal of PSA in four cycles.