Zhang Yahui, Zang Wenchao, Qin Lumei, Zheng Lei, Cao Ying, Yan Zhenguang, Yi Xianliang, Zeng Honghu, Liu Zhengtao
State Key Laboratory for Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Ecological Effects and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Chaoyang Distinct, Beijing, People's Republic of China.
Solid Waste and Chemicals Management Center, MEP, Chaoyang District, Beijing, People's Republic of China.
PLoS One. 2017 Feb 6;12(2):e0170105. doi: 10.1371/journal.pone.0170105. eCollection 2017.
The bioavailability and toxicity of metals to aquatic organisms are highly dependent on water quality parameters in freshwaters. The biotic ligand model (BLM) for copper is an approach to generate the water quality criteria (WQC) with water chemistry in the ambient environment. However, few studies were carried out on the WQCs for copper based on the BLM approach in China. In the present study, the toxicity for copper to native Chinese aquatic organisms was conducted and the published toxicity data with water quality parameters to Chinese aquatic species were collected to derive the WQCs for copper by the BLM approach. The BLM-based WQCs (the criterion maximum criteria (CMC) and the criterion continuous concentration (CCC)) for copper in the freshwater for the nation and in the Taihu Lake were obtained. The CMC and CCC values for copper in China were derived to be 1.391 μg/L and 0.495 μg/L, respectively, and the CMC and CCC in the Taihu Lake were 32.194 μg/L and 9.697 μg/L. The high concentration of dissolved organic carbon might be a main reason which resulted in the higher WQC values in the Taihu Lake. The WQC of copper in the freshwater would provide a scientific foundation for water quality standards and the environment risk assessment in China.
金属对水生生物的生物有效性和毒性高度依赖于淡水的水质参数。铜的生物配体模型（BLM）是一种根据环境中的水化学来制定水质标准（WQC）的方法。然而，在中国，基于BLM方法开展的关于铜水质标准的研究较少。在本研究中，对铜对中国本土水生生物的毒性进行了研究，并收集了已发表的铜对中国水生物种的毒性数据及水质参数，通过BLM方法推导铜的水质标准。得出了全国淡水及太湖中铜基于BLM的水质标准（准则最大浓度（CMC）和准则连续浓度（CCC））。中国铜的CMC和CCC值分别推导为1.391μg/L和0.495μg/L，太湖中的CMC和CCC分别为32.194μg/L和9.697μg/L。溶解有机碳的高浓度可能是导致太湖中水质标准值较高的主要原因。淡水铜水质标准将为中国水质标准制定和环境风险评估提供科学依据。
