Details

Autor(en) / Beteiligte

• Sun, Jianqiang
• Huang, Jing
• Zhang, Anping
• Liu, Weiping
• Cheng, Wenwei

Titel

Occurrence of phthalate esters in sediments in Qiantang River, China and inference with urbanization and river flow regime

Ist Teil von

• Journal of hazardous materials, 2013-03, Vol.248-249, p.142-149

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2013

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• [Display omitted] ► Concentrations of PAEs in the sediments were positively correlated with organic matter in Qiantang River. ► Urbanization increased the discharge of PAEs because of usage of plastic materials. ► River flow regime modified by dams significantly affected the distribution of PAEs. ► A phthalate ester exceeded a recommend environmental risk limit. Phthalate esters (PAEs), a group of emerging organic contaminants, have become a serious issue arousing much attention for their ubiquitous presence and hazardous impact on the environment. This study provides the first data on distribution of PAEs in the sediments in the Qiantang River, Zhejiang Province, China, and the inference with urbanization and river flow regime. PAEs were detected in all 23 sediment samples analyzed, and the total concentrations of their 16 congeners in sediments ranged from 0.59 to 6.74μg/g dry weight (dw), with the geometric mean value of 2.03μg/g dw. Of the 16 PAE congeners, di-n-butyl phthalate (DnBP), diisobutyl phthalate (DiBP), and di(2-ethylhexyl) phthalate (DEHP) were present in all sediment samples. The PAEs concentrations in urban regions were higher than those in rural regions because of higher discharge of PAEs from plastic materials in urbanized areas. Concentrations of PAEs were positively correlated with sediment organic matter (fOM) and negatively correlated with logistic value of annual average flow volume at sample sites. River flow regime modified by man-made dams significantly affected the distribution of PAEs. Analysis of congener composition of PAEs indicated that the DEHP was predominant congener in the Qiantang River. The normalized concentration of DEHP exceeded recommended environmental risk limit (ERL).