印染污泥性质对多环芳烃分布及经US-Fenton处理后降解的影响  

INFLUENCE OF PROPERTIES OF TEXTILE DYEING SLUDGE ON DISTRIBUTION AND DEGRADATION OF PAHs AFTER THE TREATMENT OF US-Fenton

作　　者：巫俊楫 宁寻安 WU Junji;NING Xunan(Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control,School of Environment Science and Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学环境科学与工程学院广州市环境催化与污染控制重点实验室,广州510006

出　　处：《环境工程》2022年第2期106-112,共7页Environmental Engineering

基　　金：国家自然科学基金(21577027)。

摘　　要：通过研究4家印染废水处理厂中污泥的物化性质,包括金属元素、非金属元素、有机质和16种多环芳烃含量(Σ_(16)PAHs),进一步探讨了经超声-芬顿(US-Fenton)处理后印染污泥中PAHs降解率与印染污泥物化性质的相关性。结果表明:4种印染污泥中Σ_(16)PAHs浓度为983.52-2942.34 ng/g,其中低分子量PAHs浓度为570.47-1919.97 ng/g,占比超过50%,是Σ_(16)PAHs的主要成分。经US-Fenton处理后,Σ_(16)PAHs降解率为35.24%-61.80%,低分子量PAHs降解率比高分子量PAHs降解率高,分别为28.22%-40.48%和11.76%-24.04%。印染污泥的物化性质对PAHs降解率具有显著影响,其中碳元素、铁元素和有机质分别与PAHs降解率呈负相关,而钙元素与PAHs降解率呈正相关。研究结果可为US-Fenton降解印染污泥中PAHs的机理研究提供理论依据。The physicochemical properties of four kinds of textile dyeing sludge were investigated, including the levels of metal, nonmetal, organic matter and 16 polycyclic aromatic hydrocarbons(Σ_(16)PAHs). Furthermore, the relationship between the degradation efficiency of PAHs after the treatment of ultrasonic Fenton technology(US-Fenton) and the physicochemical properties of the sludge were discussed. The results showed that the concentration of Σ_(16)PAHs in sludge was 983.52~2942.34 ng/g, and that of the low molecular weight PAHs was 570.47~1919.97 ng/g, which was the main component of Σ_(16)PAHs, accounting for more than 50% by mass weight. After the US-Fenton treatment, the degradation rate of Σ_(16)PAHs was 35.24%~61.80% and the degradation rate of lower molecular weight PAHs was higher than that of the higher molecular weight PAHs, about 28.22%~40.48% and 11.76%~24.04%, respectively. The results indicated that the characteristics of the sludge had a great impact on the degradation of PAHs, among which, C, Fe and organic matter content had a negative correlation with the degradation of PAHs, respectively. Ca content in sludge had a positive correlation with the degradation rate of PAHs. And their correlation coefficient R^(2) were all more than 0.90. This study would provide a theoretical basis for the degradation of PAHs and other organic pollutants in sludge by US-Fenton.

关 键 词：印染污泥 多环芳烃 物化性质 有机质 超声-芬顿降解 

分 类 号：X791[环境科学与工程—环境工程] X592