Degradation of polycyclic aromatic hydrocarbons (PAHs) in textile dyeing sludge with ultrasound and Fenton processes: Effect of system parameters and synergistic effect study

被引：68

作者：

Lin, Meiqing ^{[1
]}

Ning, Xun-an ^{[1
]}

An, Taicheng ^{[1
]}

Zhang, Jianhao ^{[1
]}

Chen, Changmin ^{[1
]}

Ke, Yaowei ^{[1
]}

Wang, Yujie ^{[1
]}

Zhang, Yaping ^{[1
]}

Sun, Jian ^{[1
]}

Liu, Jingyong ^{[1
]}

机构：

[1] Guangdong Univ Technol, Inst Environm Hlth & Pollut Control, Sch Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2016年 / 307卷

关键词：

Textile dyeing sludge; Ultrasound; Fenton; Polycyclic aromatic hydrocarbons (PAHs); Degradation; WASTE-WATER; SONOCHEMICAL DEGRADATION; ADVANCED OXIDATION; CONTAMINATED SOILS; RISK-ASSESSMENT; HEAVY-METALS; RHODAMINE-B; REMOVAL; BIODEGRADATION; CAVITATION;

D O I：

10.1016/j.jhazmat.2015.12.047

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

To establish an efficient oxidation process for the degradation of polycyclic aromatic hydrocarbons (PAHs) in textile dyeing sludge, the effects of various operating parameters were optimized during the ultrasound process, Fenton process and the combined ultrasound-Fenton process. The results showed that the ultrasonic density of 1.80 w/cm(3), both H2O2 and Fe2+ dosages of 140 mmol/L and pH 3 were favorable conditions for the degradation of PAHs. The degradation efficiency of high molecular weight PAHs was close to or even higher than that of light molecular weight PAHs. The highest degradation efficiencies of Sigma 16 PAHs were obtained within 30 min in the order of: Fenton (83.5%) >ultrasound-Fenton (75.5%) >ultrasound (45.5%), then the efficiencies were decreased in the other of: ultrasound-Fenton (73.0%) >Fenton (70.3%) >ultrasound (41.4%) in 60 min. The extra PAHs were released from the intracellular substances and the cavities of sludge due to the disruption of sludge during the oxidation process. Also, the degradation of PAHs could be inhibited by the other organic matter in the sludge. The combined ultrasound-Fenton process showed more efficient than both ultrasound process and Fenton process not only in the surface of sludge but also in the sludge interior. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：7 / 16

页数：10

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