Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), Dalian Key Laboratory on Chemicals Risk Control and Pollution Prevention Technology, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
Center for Energy and Environmental Resources, The University of Texas at Austin, 10100 Burnet Road, Austin, Texas 78758, United States.
Environ Sci Technol. 2022 Aug 2;56(15):11006-11016. doi: 10.1021/acs.est.2c03497. Epub 2022 Jul 20.
Di(2-ethylhexhyl) phthalate (DEHP) is a widely used plasticizer that has adverse effects on ecosystems and human health. However, data about its stocks, flows, emission rates, as well as ecological risks are generally unknown in China, one of the world's largest producers of chemicals including DEHP, limiting sound management of chemicals. Herein, dynamic material flow analysis, coupled with a multimedia environmental model and ecological risk analysis, was performed to fill the data gap about DEHP in China mainland from 1956 to 2020. Results indicate that the in-use stocks of DEHP increased from 6.54 × 10 kg in 1956 to 8.40 × 10 kg in 2020. With growth in the emission rates, DEHP concentrations in air, soil, water, and sediment kept increasing from 1956 to 2010, which declined after 2010 and regrew after 2015. Sediment was a main sink of DEHP with the highest ecological risk quotient of >10 after 1999, necessitating measures for controlling the risk, for example, technology innovation to reduce DEHP emission rates, and substitution of DEHP with low-toxic alternatives. The coupled models that connect socio-economic data with ecological risk output may provide a systematic methodology for verification of the data necessary for risk control of chemicals.
邻苯二甲酸二（2-乙基己基）酯（DEHP）是一种广泛使用的增塑剂，对生态系统和人类健康有不良影响。然而，在中国，包括 DEHP 在内的化学物质的库存、流动、排放率以及生态风险数据通常不为人知，这限制了对化学品的妥善管理。本研究采用动态物质流分析，结合多媒体环境模型和生态风险分析，填补了中国大陆 1956 年至 2020 年 DEHP 数据空白。结果表明，DEHP 的在用库存从 1956 年的 6.54×10 kg 增加到 2020 年的 8.40×10 kg。随着排放率的增长，空气、土壤、水和沉积物中 DEHP 的浓度从 1956 年持续增加到 2010 年，2010 年后开始下降，2015 年后又重新上升。沉积物是 DEHP 的主要汇，1999 年后其生态风险商数（RQ）一直大于 10，需要采取措施控制风险，例如，通过技术创新降低 DEHP 的排放率，以及用低毒替代品替代 DEHP。连接社会经济数据与生态风险输出的耦合模型，可能为风险控制所需数据的验证提供一种系统的方法。
