College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China.
Institute of Land Resources Survey and Plan of Guizhou Province, Guiyang 550004, China.
Ecotoxicol Environ Saf. 2018 May 15;152:24-32. doi: 10.1016/j.ecoenv.2018.01.026. Epub 2018 Feb 4.
We collected samples (i.e., the aerial parts and roots of Juncus effusus and their growth media) in the indigenous zinc smelting area in the northwest region of Guizhou Province, China, and we measured and analyzed potentially toxic metal(loid)s (arsenic, As; cadmium, Cd; chromium, Cr; copper, Cu; mercury, Hg; lead, Pb and zinc, Zn) in these samples. The results include the following: First, there is a high concentration of one or more potentially toxic metal(loid)s in the slag and surrounding soil in the research area. This situation might be caused by metal(loid) damage or contamination due to the circumstances. Additionally, Juncus effusus in the indigenous zinc smelting area are contaminated by some potentially toxic metal(loid)s; since they are used for Chinese medical materials, it is especially significant that their As, Cd and Pb concentrations are greater than their limited standard values. Finally, both the bioconcentration factors and transfer factors for most potentially toxic metal(loid)s in Juncus effusus are less than 1 in the study area. Therefore, we suggest that Juncus effusus could be used for phytostabilization or as a pioneer plant for phytoremediation of potentially toxic metal(loid)s because it has a tolerance and exclusion mechanism for these metal(loid)s in the research district.
我们在中国贵州省西北部的原生锌冶炼区收集了样品（即灯心草的地上部分和根及其生长介质），并对这些样品中的潜在有毒金属（砷、镉、铬、铜、汞、铅和锌）进行了测量和分析。结果如下：首先，研究区域中的炉渣和周围土壤中存在一种或多种潜在有毒金属（砷、镉和铅）的高浓度。这种情况可能是由于金属（砷、镉和铅）损坏或污染造成的。此外，原生锌冶炼区的灯心草受到一些潜在有毒金属（砷、镉和铅）的污染；由于它们被用作中国药材，因此它们的砷、镉和铅浓度超过限量标准尤为重要。最后，研究区中大多数潜在有毒金属（砷、镉和铅）在灯心草中的生物浓缩因子和转移因子均小于 1。因此，我们建议可以将灯心草用于潜在有毒金属（砷、镉和铅）的植物稳定化或作为植物修复的先锋植物，因为它在研究区域中对这些金属（砷、镉和铅）具有耐受和排除机制。
