BIOSUV Group, University of Vigo, MTI Building, Campus Universitario de Vigo, 36310, Vigo, Spain.
Laboratory of the Physico-Chemistry of Solid States, University of Sfax, 3000, Sfax, Tunisia.
Environ Sci Pollut Res Int. 2017 Aug;24(22):18309-18319. doi: 10.1007/s11356-017-9468-5. Epub 2017 Jun 21.
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 HO 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.
污染物的多样性和快速繁殖促使人们改进传统的废水处理方法。其中一个经常面临的瓶颈是废水中存在具有复杂结构的有机污染物，这需要设计高效的工艺。因此，本工作研究了使用黄铁矿作为可持续催化剂的非均相氧化过程来去除聚烯丙基胺磺酸盐蒽吡啶酮（PSA）染料，其复杂的结构使得传统技术难以降解。为此，设计了一种使用黄铁矿作为可持续催化剂的非均相氧化过程。最初，通过比较硼掺杂金刚石镍泡沫体系，确定了 BBD-碳纤维毡作为阳极和阴极分别产生 HO 的系统 BBD-碳纤维毡的性能。碳纤维毡电极提供了最高的氧化剂产量，因此被选择用于处理聚合染料。评估了几种氧化过程，通过应用电芬顿-黄铁矿过程，获得了最佳的降解水平。此外，确定染料去除遵循准一级动力学模型，在最佳黄铁矿用量 2 g/L 和电流强度 200 mA 的操作条件下，效率最高。根据最佳实验条件，经过 6 小时后，几乎可以完全矿化（总有机碳去除率为 95%）。此外，通过在四个循环中去除 PSA 来评估黄铁矿的可重复使用性。
