Development of ecological risk assessment for Diisobutyl phthalate and di-n-octyl phthalate in surface water of China based on species sensitivity distribution model

• Published in: Chemosphere (Oxford) Vol. 307; no. Pt 3; p. 135932
• Main Authors: Huan-yu, Tao, Jiawei, Zhang, Li bin, Hui, Ge, Mengtao, Zhang, Wei, Guo, Jianghong, Shi, Xiao-yan, Li
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.11.2022
• Subjects: Aquatic Organisms; China; Di-n-octyl phthalate; Dibutyl Phthalate - analogs & derivatives; Dibutyl Phthalate - toxicity; Diisobutyl phthalate; Esters; Ethylamines; Phthalic Acids - toxicity; Plasticizers - toxicity; Risk Assessment; Rivers; Sediment; Species sensitivity distribution; Surface water; Water; Water Pollutants, Chemical - analysis; Water Pollutants, Chemical - toxicity; China; Species sensitivity distribution; Diisobutyl phthalate; Sediment; Di-n-octyl phthalate; Risk assessment; Surface water
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2022.135932

Phthalic acid esters (PAEs) are commonly used as plasticizer and are emerging concern worldwide for potent adverse effects of aquatic organisms. Certain PAEs were often detected in different environmental matrices but related toxicity data were still lacking to support their risk assessment. The study investigated the acute toxicity of Diisobutyl phthalate (DiBP) and Di-n-octyl phthalate (DnOP) using 6 Chinese resident aquatic organisms from 3 phyla and 6 species and constructed the species sensitivity distribution (SSD) models for ecological risk assessment. Lethal concentration 50% (LC50) ranges of DiBP and DnOP were 4.89–21.45 mg/L and 1.45–1200 mg/L, respectively. The derived acute and chronic predicted no-effect concentrations (PNECs) based on log-normal model of water were 0.54 and 0.04 mg/L for DiBP and 0.23 and 0.05 mg/L for DnOP, respectively. The ERA for DiBP and DnOP in the surface water and sediment of China was conducted. Water samples of Haihe Rive (RQ = 0.41) and Hun River (RQ = 0.16) of DiBP showed medium risk. And sediment samples of Yellow River (RQ = 0.71) and Chao Hu Lake (RQ = 0.42) of DiBP showed medium risk. Meanwhile, the above water and sediment samples (RQ＜0.1) of DnOP showed low risk. [Display omitted] •The toxicity tests of diisobutyl phthalate and di-n-octyl phthalate have been conducted.•The most sensitive species are Pseudokirchneriella subcapitata for DiBP and Daphnia carinata for DnOP.•The acute and chronic PNECs based on SSDs were 0.54 and 0.04 mg/L for DiBP and 0.23 and 0.05 mg/L for DnOP.•DiBP exhibited potential medium risks to screened water and sediment samples.