Zhou Xiaoli, Chen Qin, Liu Chang, Fang Yanming
Co-Innovation Center for Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China.
Int J Environ Res Public Health. 2017 Apr 17;14(4):430. doi: 10.3390/ijerph14040430.
Bryophytes act as bioindicators and bioaccumulators of metal deposition in the environment. To understand the atmospheric deposition of heavy metals (cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), nickel (Ni), lead (Pb), and zinc (Zn)) in Taizhou, East China, samples of moss () were collected from 60 sites selected by a systematic sampling method during the summer of 2012, and the concentrations of these heavy metals were determined by inductively coupled plasma atomic emission spectroscopy (ICP-AES). The results suggested that the concentrations of these metals varied moderately among different sites, indicating a similar contamination level for each element throughout the monitoring region. The mean values under investigation were higher than those from neighboring cities, such as Wuxi, Xuzhou, and Nanjing, and much higher than those in Europe based on a 2010 survey. Significant ( < 0.01) correlations were identified among some of the heavy metals, suggesting that these originated from identical sources. There was no statistically significant correlation between Hg and all the other elements. Spatial distribution maps of the elements over the sampled territory were created using Arc-GIS 9.0. The potential ecological risk index indicated that the air was heavily polluted by Cd and Hg, and that there was a considerable potential ecological risk from all the heavy metals studied.
苔藓植物可作为环境中金属沉积的生物指示物和生物累积器。为了解中国东部台州市大气中重金属（镉（Cd）、铬（Cr）、铜（Cu）、汞（Hg）、镍（Ni）、铅（Pb）和锌（Zn））的沉积情况，于2012年夏季采用系统抽样方法从60个地点采集了苔藓（）样本，并通过电感耦合等离子体原子发射光谱法（ICP - AES）测定了这些重金属的浓度。结果表明，这些金属的浓度在不同地点之间变化适中，表明整个监测区域内各元素的污染水平相似。所调查的平均值高于邻近城市如无锡、徐州和南京，且远高于2010年一项调查中欧洲的水平。在一些重金属之间发现了显著（<0.01）的相关性，表明它们来自相同的来源。汞与所有其他元素之间没有统计学上的显著相关性。使用Arc - GIS 9.0绘制了采样区域内各元素的空间分布图。潜在生态风险指数表明，空气受到镉和汞的严重污染，并且所有研究的重金属都存在相当大的潜在生态风险。
