摘要：Transformation of dissolved organic matter (DOM) in petrochemical wastewater (PCW) treatment has rarely been studied. In this work, low-and high-salinity PCW were collected from a treatment plant and the trans-formations of DOM at molecular level along the treatment processes of both PCW were comparatively investi-gated. By using Orbitrap MS, the polar DOM constituents were categorized into five molecular classes namely saturated compounds, aliphatics, highly unsaturated and phenolic compounds (Huph), polyphenols and condensed polycyclic aromatics (Cpla). Aliphatics (58.62%) with low molecular weight (150-250 Da) and O/C (0-0.2) were dominant in raw low-salinity PCW; while Huph (65.03%) with O/C at 0.2-0.8 were rich in raw high-salinity PCW. After full-scale treatment, differentiated DOM constituents in both raw PCWs were trans-formed into aliphatics and Huph with O/C at 0.3-0.5. Anoxic/Oxic treatment of low-salinity system (L-A/O) removed a high fraction of aliphatics (53.05%); while Huph with low O/C (0.1-0.3) (65.68%) in the effluent of L -A/O were further mineralized by ozonation of low-salinity system (L-ozonation). In comparison, anoxic/oxic treatment of high-salinity system (H-A/O) mainly removed unsaturated Huph (34.10%) and aliphatics (30.86%). This resulted in a decrease of dissolved organic carbon as indicated via Spearman correlation. Different from L-ozonation, ozonation of high-salinity system (H-ozonation) degraded aliphatics (26.09%) and Huph (41.85%) with a relatively high O/C (0.2-1.2). After L-A/O and L-ozonation treatments, remaining saturated compounds that were originated from raw low-salinity PCW, were removed by subsequent biological aerated filter. Comparatively, after H-A/O and H-ozonation treatments, residual Huph and aliphatics which were mainly bio-derivates and ozonated intermediates, were further removed by air flotation filter. Hence, DOM transformation of different PCWs along similar treatments varied significantly. This study provides in-depth insights on DOM transformation along a full-scale PCW treatment process.

关键字：Petrochemical wastewater treatment; Dissolved organic matter; Comparison; Transformation; Orbitrap mass spectrometry

ISSN号：0301-4797

卷、期、页：卷329

发表日期：2023-03-01

影响因子：0.000000

期刊分区（SCI为中科院分区）：一区

收录情况：SCI（科学引文索引印刷版）,SCIE（科学引文索引网络版）

发表期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT

参与作者：El-Din, Mohamed Gamal

通讯作者：寇悦,姜峻韬,杨百玉,孙鹤,王乐琪

第一作者：王庆宏,史权,陈春茂

论文类型：期刊论文

论文概要：寇悦,姜峻韬,杨百玉,孙鹤,王乐琪,王庆宏,El-Din, Mohamed Gamal,史权,陈春茂，Transformation of dissolved organic matter at a full-scale petrochemical wastewater treatment plant，JOURNAL OF ENVIRONMENTAL MANAGEMENT，2023，卷329

论文题目：Transformation of dissolved organic matter at a full-scale petrochemical wastewater treatment plant