CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, Anhui, China.
Anhui Research Academy of Environmental Sciences, Hefei, 230022, Anhui, China.
Environ Geochem Health. 2023 May;45(5):2167-2182. doi: 10.1007/s10653-022-01329-2. Epub 2022 Jul 20.
As one of the five great lakes in China, the Chaohu Lake Basin is the main water source for regional economic and ecological development in Hefei city and is considered a source of drinking water. The spatial-temporal distributions and occurrence of soluble trace elements were studied in the surrounding ten rivers in the Chaohu Lake Basin as well as water quality and risk assessment during the normal and wet seasons. Principal component analysis (PCA) showed that the main source of river pollution during the two seasons was the mining industry. High values of most elements were found in the northwestern rivers in the two seasons. The temporal changes in the elements showed that the distributions of As, Mn, Cd, and Cu in the two seasons were very different, but the trends of Ni, Co, and V were basically the same. The sodium adsorption ratio (SAR) showed that almost all river samples needed to be treated before irrigation, and the water quality index (WQI) showed that most samples were of excellent water quality for drinking. The ecological risk assessment results showed that the risks in the two seasons were all slight. The results of the health risk evaluation suggested that no noncarcinogenic risks were found in the normal season and that the carcinogenic risks from Cr and As reached their highest levels in the normal and wet seasons, respectively. This research can provide vital data for rational water control and water quality conservation, offer a scientific basis for ecological environment safety, and offer a reference for carcinogenic and noncarcinogenic health risks to regional residents.
作为中国五大淡水湖之一，巢湖流域是合肥市区域经济和生态发展的主要水源地，也是合肥市的饮用水源地。本研究对巢湖流域周边的 10 条河流在丰水期和平水期的水质状况、可溶性微量元素的时空分布特征及其健康风险进行了评估。主成分分析（PCA）表明，丰水期和枯水期河流污染的主要来源是采矿业。两个季节中，大多数元素在西北部河流中的含量较高。元素的时间变化表明，As、Mn、Cd 和 Cu 在两个季节的分布差异很大，但 Ni、Co 和 V 的趋势基本相同。钠离子吸附比（SAR）表明，几乎所有河流样本在灌溉前都需要进行处理，水质指数（WQI）表明，大多数样本的水质都非常适合饮用。生态风险评估结果表明，两个季节的风险都很小。健康风险评估结果表明，在丰水期没有发现非致癌风险，而 Cr 和 As 的致癌风险在丰水期和枯水期分别达到最高水平。本研究可为合理的水资源控制和水质保护提供重要数据，为生态环境安全提供科学依据，为区域居民的致癌和非致癌健康风险提供参考。
