化学
污染物
毒性
石油化工
环境化学
废水
急性毒性
电凝
反渗透
环境工程
环境科学
有机化学
膜
生物化学
物理化学
作者
Chenhao Gong,Xiaojing Ren,Junxing Han,Yonggang Wu,Yaling Gou,Zhongguo Zhang,Peiran He
出处
期刊:Chemosphere
[Elsevier]
日期:2022-01-01
卷期号:286: 131582-131582
被引量:18
标识
DOI:10.1016/j.chemosphere.2021.131582
摘要
In this work, both Electrocoagulation (EC) and Fered-Fenton (FF) technologies were used to treat reverse osmosis concentrates (ROC) from petrochemical production. The toxicity reduction capacity and mechanism were comparatively assessed during these two treatments. The results showed that FF exhibited higher capacity to reduce toxicity than EC in the 30 min treatment, which could be attributed to the removal of organic pollutants and heavy metals. The results showed that the ROC contained organics with molecular weight of 1200 g mol−1 and 220 g mol−1, which mainly consisted of the soluble microbial by-product-like and humic acid-like substances. The removal of these organics directly led to the noticeable toxicity reduction. Alkanes, haloalkanes, ketones, PAHs, and other four organic pollutants were the dominant species in the ROC, and the removal of small molecular weight organic pollutants played an essential role in reducing toxicity. FF exhibited stronger capacity to remove PAHs, BTEXS and haloalkanes, and the removal efficiencies for the PAHs were in the following order: 5-ring > 4-ring > 3-ring > 2-ring. The promotion of heavy metals removal appeared to be favorable for decreasing toxicity in ROC. This study illustrated the mechanism of the toxicity reduction and the characteristics of pollutants removal during FF and EC treatments, and provided valuable guidance for petrochemical manufacturing to the toxicity reduction and operation of wastewater treatment facilities.
科研通智能强力驱动
Strongly Powered by AbleSci AI