Madejón Paula, Lepp Nicholas W
School of Biological and Earth Sciences, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK.
Sci Total Environ. 2007 Jul 1;379(2-3):256-62. doi: 10.1016/j.scitotenv.2006.08.051. Epub 2006 Oct 10.
Plant As accumulation at three As-polluted sites where spontaneous re-vegetation has taken place is examined. Each site had a different source of soil As (coal fly ash, LeBlanc process waste, canal dredging). Plant analysis indicates that soil-plant As transfer is poor at each site. Any mobile As is retained in root tissues, with little transfer to shoots. Bryophytes, pteridophytes, herbaceous and woody plants sampled at each site predominantly showed As concentrations of <3 mg kg(-1) dry wt, whilst total soil As ranged between 50 and 220 mg kg(-1) dry wt. Risk associated with food chain transfer at these sites is low when compared to other routes such as direct ingestion/inhalation of As-contaminated particulates re-entrained from an unvegetated or unstable substrate.
研究了在三个已发生自然植被恢复的砷污染场地中植物对砷的积累情况。每个场地的土壤砷来源不同（粉煤灰、勒布朗法废料、运河疏浚物）。植物分析表明，每个场地土壤与植物之间的砷转移能力较差。任何可移动的砷都保留在根部组织中，很少转移到地上部分。在每个场地采集的苔藓植物、蕨类植物、草本植物和木本植物的砷含量主要<3 mg·kg⁻¹干重，而土壤总砷含量在50至220 mg·kg⁻¹干重之间。与其他途径（如直接摄入/吸入从无植被或不稳定基质中再悬浮的受砷污染颗粒物）相比，这些场地通过食物链转移的风险较低。
