Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University, 420/6 Ratchavithi Rd, Bangkok 10400, Thailand.
Int J Environ Res Public Health. 2018 Aug 31;15(9):1890. doi: 10.3390/ijerph15091890.
Industrial activity is one of the significant sources of environmental contamination with heavy metals, especially in developing countries. Flood can also lead to the distribution of toxic substances into the environment, regarding the Thailand flood in 2011 as some industrial estates are affected, leading to concern about heavy metals from industrial wastewater contamination. We aimed to measure the levels of Cd, Cr, Cu, Ni, Mn, Pb, and Zn in river and stream water, sediment, and fish collected from the area around the industrial estates in Uthai District and Bangpa-in District of Phra Nakhon Si Ayutthaya Province, following the floods of 2011. The results revealed that heavy metal levels in water did not exceed Thailand surface water quality standards, except for Mn levels at one sampling site. Metal levels in sediment and fish samples also did not exceed published standards. The hazard quotient for fish consumption was highest for Ni (0.2178) in collected from the area near the industrial estate in Bangpa-in District, while the hazard index from Cd, Cr, and Cu exposure were 0.86966, which was lower than 1, indicating that the health risks for these seven metals were within acceptable ranges.
工业活动是重金属环境污染的重要来源之一，特别是在发展中国家。洪水也可能导致有毒物质扩散到环境中，例如 2011 年泰国洪水期间，一些工业区受到影响，引起了人们对工业废水中重金属污染的担忧。我们旨在测量 2011 年洪水过后，乌泰他尼府乌泰区和巴恩帕因区工业区周围地区河流和溪流水中、沉积物中和鱼类中 Cd、Cr、Cu、Ni、Mn、Pb 和 Zn 的水平。结果表明，除了一个采样点的 Mn 水平外，水中重金属水平未超过泰国地表水质量标准。沉积物和鱼类样本中的金属水平也未超过公布的标准。来自巴恩帕因区工业区附近地区采集的鱼类中 Ni（0.2178）的食用危害系数最高，而 Cd、Cr 和 Cu 暴露的危害指数为 0.86966，低于 1，表明这七种金属的健康风险在可接受范围内。
