Levels, composition profiles and risk assessment of polycyclic aromatic hydrocarbons (PAHs) in sludge from ten textile dyeing plants.
As components of synthetic dyes, polycyclic aromatic hydrocarbons (PAHs) are present as contaminants in textile dyeing sludge due to the recalcitrance in wastewater treatment process, which may pose a threat to environment in the process of sludge disposal. In order to evaluate PAHs in textile dyeing sludge, comprehensive investigation comprising 10 textile dyeing plants was undertaken. Levels, composition profiles and risk assessment of 16 EPA-priority PAHs were analyzed in this study. The total concentrations of 16 PAHs (∑16 PAHs) varied from 1463 ± 177 ng g(-1) to 16,714 ± 1,507 ng g(-1) with a mean value of 6386 ng g(-1). The composition profiles of PAHs were characterized by 3- and 4-ring PAHs, among which phenanthrene, anthracene and fluoranthene were the most dominant components. The mean benzo[a]pyrene equivalent (BaPeq) concentration of ∑16 PAHs in textile dyeing sludge was 423 ng g(-1), which was 2-3 times higher than concentrations reported for urban soil. According to ecological risk assessment, the levels of PAHs in the textile dyeing sludge may cause a significant risk to soil ecosystem after landfill or dumping on soil.
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: ningxunan666@126.com.
Xun-An
XA
Ning
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: linmeiqing00@163.com.
Mei-Qing
MQ
Lin
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Ling-Zhi
LZ
Shen
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Jian-Hao
JH
Zhang
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Jing-Yu
JY
Wang
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Yu-Jie
YJ
Wang
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Zuo-Yi
ZY
Yang
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Jing-Yong
JY
Liu
D007220:Industrial Waste / Q000032:analysis*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D018570:Risk Assessment; D013784:Textiles
D007220:Industrial Waste; D011084:Polycyclic Aromatic Hydrocarbons
Carcinogenic risk assessment; Disposal; Ecological risk assessment; Polycyclic aromatic hydrocarbons (PAHs); Textile dyeing sludge