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Trace organic contaminants abatement by permanganate/bisulfite pretreatment coupled with conventional water treatment processes: Lab- and pilot-scale tests.
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-07-06 , DOI: 10.1016/j.jhazmat.2020.123380
Jie Chen 1 , Jinfeng Ling 1 , Bo Sun 2 , Jian Wang 3 , Baoxue Zhou 4 , Xiaohong Guan 5 , Yuankui Sun 5
Affiliation  

Bisulfite-activated permanganate (PM/BS) process has proven to be a promising method for trace organic contaminants (TrOCs) abatement. However, to our knowledge, most previous studies on PM/BS process were limited in synthetic water at lab-scale. Hence, the performance of TrOCs abatement by PM/BS process was investigated in real waters in this study, and for the first time, its feasibility as a pretreatment process was evaluated at pilot-scale. The lab-scale results indicated that almost all tested TrOCs could be completely removed from pure water, while their removal efficiencies varied widely from ∼20% to ∼90% in real waters. Correlation analysis suggested that TrOCs abatement decreased linearly with increasing concentration of dissolved organic matter (DOM) and halide ions in real waters. The TrOCs with electron-donating groups were more likely to be decomposed in PM/BS process. The PM/BS pretreatment produced MnO2 and decreased the aromatic signal of the DOM, which enhanced the removal of DOM during subsequent coagulation-sedimentation processes. Comparing with ozonation, chlorination, and permanganate processes, PM/BS process showed some advantages in terms of TrOCs abatement and operating costs. Furthermore, the pilot-scale experiment confirmed that PM/BS process combined with traditional water treatment processes could achieve excellent TrOCs abatement (greater than 84%).



中文翻译:

高锰酸盐/亚硫酸氢盐预处理与常规水处理工艺相结合可减少痕量有机污染物:实验室规模和中试规模的测试。

事实证明,亚硫酸氢盐活化的高锰酸盐(PM / BS)工艺是减少有机污染物(TrOCs)的一种有前途的方法。然而,据我们所知,以前大多数关于PM / BS工艺的研究都局限于实验室规模的合成水中。因此,在这项研究中,研究了在真实水中通过PM / BS工艺减排TrOCs的性能,并且首次在中试规模上评估了其作为预处理工艺的可行性。实验室规模的结果表明,几乎所有测试过的TrOCs都可以从纯水中完全去除,而在真实水中,其去除效率则从约20%到约90%不等。相关分析表明,TrOCs的减少随着真实水中溶解有机物(DOM)和卤离子的浓度增加而线性降低。带有给电子基团的TrOCs在PM / BS过程中更容易分解。PM / BS预处理产生的MnO2降低了DOM的芳香信号,从而在后续的凝沉过程中增强了DOM的去除。与臭氧化,氯化和高锰酸盐工艺相比,PM / BS工艺在减少TrOCs和运行成本方面显示出一些优势。此外,中试规模实验证实,将PM / BS工艺与传统水处理工艺相结合可实现出色的TrOC减排(大于84%)。

更新日期:2020-07-06
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