Environmental Technology ( IF 2.8 ) Pub Date : 2020-08-11 , DOI: 10.1080/09593330.2020.1803417 Maha A Tony 1, 2 , Lian-Shin Lin 1
ABSTRACT
The feasibility of using iron extracted from acid mine drainage (AMD) as Fenton’s reagent for removal of organics pollutants from polymer and plastics manufacturing effluent was investigated in this study. AMD iron dose, H2O2 concentration and pH were evaluated as the treatment factors for their effects on organics oxidation. Optimum treatment conditions were identified using response surface methodological analysis (RSM), and of the ranges of the treatment factors examined, an optimal treatment combination was found to be AMD iron concentration: 40 mg/L and H2O2: 500 mg/L at pH 2.2, organics removal efficiency as high as 98% for TOC removal was achieved. The removal efficiency increased with temperature up to 40°C and further temperature increases resulted in lower removal efficiencies. The organics oxidation was characterized well by investigating the kinetic order and the process is following the second-order reaction kinetics. The thermodynamic parameters showed that the oxidation reaction was endothermic and non-spontaneous in nature.
中文翻译:
使用铁基污泥降低聚合物加工废水中的有机物污染:工艺优化和氧化机制
摘要
本研究调查了使用从酸性矿山排水 (AMD) 中提取的铁作为 Fenton 试剂去除聚合物和塑料制造废水中有机污染物的可行性。AMD铁剂量、H 2 O 2浓度和pH被评估为它们对有机物氧化的影响的处理因素。使用响应面方法分析 (RSM) 确定了最佳治疗条件,在检查的治疗因素范围内,发现最佳治疗组合是 AMD 铁浓度:40 mg/L 和 H 2 O 2:在 pH 2.2 时为 500 mg/L,有机物去除效率高达 98%,去除 TOC。去除效率随着温度升高到 40°C 而增加,进一步的温度升高导致去除效率降低。通过研究动力学顺序很好地表征了有机物氧化,并且该过程遵循二级反应动力学。热力学参数表明氧化反应本质上是吸热的和非自发的。