活性炭预涂动态膜处理船舶含油废水过程中溶解性有机物的分子组成特征  

Molecular composition characteristics of dissolved organic compounds in the process of treatment of marine oily wastewater by activated carbon precoated dynamic membrane

作　　者：周毅 黄武林 谭冠新 陈敏 陈嘉 林明富 张晓霞 ZHOU Yi;HUANG Wulin;TAN Guanxin;CHEN Min;CHEN Jia;LIN Mingfu;ZHANG Xiaoxia(Guangzhou Jinghai oily water Treatment Co.,Ltd.Guangzhou 511436,China)

机构地区：[1]广州净海油污水工程有限公司,广州511436

出　　处：《环境工程学报》2024年第2期461-470,共10页Chinese Journal of Environmental Engineering

摘　　要：动态膜技术以其高效、低成本等优点,在船舶含油废水深度处理领域展现出重要的应用潜力。然而船舶含油废水中有机物组成极其复杂,其在动态膜处理过程中的分子特征及变化尚需进一步研究。采用超高分辨质谱研究船舶含油废水中溶解性有机物(DOM)在动态膜过滤过程处理不同时间的分子组成特征。结果表明,船舶含油废水经动态膜处理前有超过2200种DOM分子式,其主要由CHOS、CHONP等含杂原子类物质组成。动态膜处理过程中,前10 min由于活性炭的较强的吸附能力,对大部分有机物显示出良好的去除率,废水的COD和DOC去除率均在80%以上,此阶段对大分子质量、不饱和氧化性DOM去除效果较好。随后活性炭吸附能力下降,动态膜对COD和DOC的去除率逐渐衰减,60 min时均下降至50%左右。60 min后船舶含油废水中DOM的分子组成未观察到明显变化。本研究揭示了船舶含油废水在动态膜处理过程中DOM分子层面的组成和变化特征,为动态膜技术高效处理难去除船舶含油废水提供一定的工艺参考。Dynamic membrane technology has the advantages of high efficiency and low cost in the field of advanced treatment of marine oily wastewater.However,the composition of organic matter in marine oily wastewater is extremely complex,and further study is necessary for the molecular characteristics and changes in the dynamic membrane treatment process.In this study,ultra-high-resolution mass spectrometry was used to investigate the changes in the molecular composition characteristics of dissolved organic matter(DOM)in marine oily wastewater during dynamic membrane filtration treatment.The results showed that there were more than 2200 DOM molecular formulas in raw marine oily wastewater,which were mainly composed of heteroatomic-containing substances such as CHOS and CHONP.Due to the significant adsorption capacity of activated carbon,an excellent removal rate occurred for most organic matter in the first 10 minutes of the dynamic membrane treatment process.The removal rates of COD and DOC in wastewater were both greater than 80%,and high molecular weight and unsaturated oxidizing DOM was effectively removed at this stage.Subsequently,the adsorption capacity of activated carbon decreased,and the removal rates of COD and DOC by the dynamic membrane gradually declined,both dropping to around 50% after 60 minutes,moreover no significant changes occurred in the molecular composition of DOM in the marine oily wastewater.This study revealed the molecular composition and variation characteristics of DOM in the process of dynamic membrane treatment of marine oily wastewater,and could provide a certain process reference for the efficient treatment of refractory marine oily wastewater by dynamic membrane technology.

关 键 词：动态膜 船舶含油废水 溶解性有机物 超高分辨质谱 

分 类 号：X703[环境科学与工程—环境工程]