Natural and Built Environments Research Centre, Division of Information Technology, Engineering and the Environment, University of South Australia, Adelaide, SA, 5095, Australia.
Future Industries Institute, Division of Information Technology, Engineering and the Environment, University of South Australia, Adelaide, SA, 5095, Australia.
Environ Sci Pollut Res Int. 2018 Feb;25(6):5063-5070. doi: 10.1007/s11356-017-0543-8. Epub 2017 Nov 3.
Chromium from tannery waste dump site causes significant environmental pollution affecting surrounding flora and fauna. The primary aims of this study were to survey vegetation, investigate the degree of soil pollution occurring near tannery waste dump site and make a systematic evaluation of soil contamination based on the chromium levels found in plants and earthworms from the impacted areas. This paper presents the pollution load of toxic heavy metals, and especially chromium, in 10 soil samples and 12 species of plants. Soil samples were analysed for heavy metals by using ICP-MS/ICP-OES method. Results indicated that Cr in soils exceeded soil quality guideline limits (SQGL). The total chromium present in the above ground parts of plants ranged from 1.7 mg kg in Casuarina sp. to 1007 mg kg in Sonchus asper. The Cr bioaccumulation in Eisenia fetida from tannery waste soil ranged from 5 to 194 mg kg. The high enrichment factor of Cr in S. asper and bioaccumulation factor in earthworms indicate that there is a steady increase of toxic chromium risk in this area, which could be correlated with the past dumping activity. Emphasis needs to be put on control measures of pollution and remediation techniques in such areas to achieve an ecologically sustainable industrialisation.
制革厂废料堆放场的铬造成了严重的环境污染，影响了周围的动植物。本研究的主要目的是调查植被，调查制革厂废料堆放场附近土壤污染的程度，并根据受影响地区植物和蚯蚓中的铬水平对土壤污染进行系统评估。本文介绍了 10 个土壤样本和 12 种植物中有毒重金属，特别是铬的污染负荷。使用 ICP-MS/ICP-OES 法对土壤样本中的重金属进行了分析。结果表明，土壤中的 Cr 超过了土壤质量指导限值 (SQGL)。植物地上部分的总铬含量从 1.7mg/kg 的木麻黄到 1007mg/kg 的苦苣菜不等。从制革厂废物土壤中分离出的赤子爱胜蚓中的 Cr 生物累积量范围为 5-194mg/kg。苦苣菜中 Cr 的高富集因子和蚯蚓中的生物累积因子表明，该地区的有毒铬风险正在稳步增加，这可能与过去的倾倒活动有关。需要重视这些地区的污染控制措施和修复技术，以实现生态可持续的工业化。
