School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, PR China.
School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, PR China.
Sci Total Environ. 2020 Sep 15;735:139360. doi: 10.1016/j.scitotenv.2020.139360. Epub 2020 May 12.
Heavy metals (HMs) such as vanadium (V), zinc (Zn), arsenic (As), chromium (Cr), copper (Cu) and nickel (Ni) are released into atmosphere during V smelting activities, resulting in their co-existence with airborne microbes. However, little is known about HMs distributions and associated microbes in aerosols from such industrial districts. This study reveals seasonal dynamics of HMs and microbes in ambient aerosols from V smelter in Panzhihua, China. Multiple HMs were detected, while V concentration was the highest, maximizing at 228.0 ± 10.3 ng/m in Spring. Health risks displayed similar trends to HMs distributions, and children were posed much higher risks than adults due to their more sensitivity to HMs. V and As contributed dramatically to total health risks among all examined HMs. High-throughput 16S rRNA gene sequencing analysis revealed microbes tolerant to V, Zn, As, Cr, Cu and Ni. Acinetobacter widely existed with function of detoxifying V(V) and more species as Bacillus, Gobacter and Thauera tolerating V, Zn, As, Cr, Cu and Ni appeared in Summer. These findings shed light on understandings of HMs dynamics and associated microbial community in aerosols from smelting regions.
重金属（HMs）如钒（V）、锌（Zn）、砷（As）、铬（Cr）、铜（Cu）和镍（Ni）在 V 冶炼活动中释放到大气中，导致它们与空气中的微生物共存。然而，对于来自这些工业区的气溶胶中 HMs 的分布和相关微生物知之甚少。本研究揭示了中国攀枝花 V 冶炼厂周围大气气溶胶中 HMs 和微生物的季节性动态。检测到多种 HMs，其中 V 浓度最高，春季最高可达 228.0±10.3ng/m。健康风险与 HMs 分布呈相似趋势，由于儿童对 HMs 更敏感，因此比成年人面临更高的风险。V 和 As 对所有检测到的 HMs 中的总健康风险贡献最大。高通量 16S rRNA 基因测序分析揭示了对 V、Zn、As、Cr、Cu 和 Ni 具有耐受性的微生物。Acinetobacter 广泛存在，具有 V(V)解毒功能，更多的物种如 Bacillus、Gobacter 和 Thauera 对 V、Zn、As、Cr、Cu 和 Ni 具有耐受性，出现在夏季。这些发现为理解冶炼区气溶胶中 HMs 动态和相关微生物群落提供了线索。
