栾树幼苗的生长、重金属积累及其对中国湖南锰矿废弃地的修复潜力
Growth and heavy metal accumulation of Koelreuteria paniculata seedlings and their potential for restoring manganese mine wastelands in Hunan, China.
作者信息
Huang Zhihong, Xiang Wenhua, Ma Yu'e, Lei Pifeng, Tian Dalun, Deng Xiangwen, Yan Wende, Fang Xi
机构信息
National Engineering Laboratory for Applied Technology of Forestry & Ecology in South China, Central South University of Forestry and Technology, Changsha 410004, Hunan, China.
Faculty of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, Hunan, China.
出版信息
Int J Environ Res Public Health. 2015 Feb 3;12(2):1726-44. doi: 10.3390/ijerph120201726.
The planting of trees on mine wastelands is an effective, long-term technique for phytoremediation of heavy metal-contaminated wastes. In this study, a pot experiment with seedlings of Koelreuteria paniculata under six treatments of local mine wastes was designed to determine the major constraints on tree establishment and to evaluate the feasibility of planting K. paniculata on manganese mine wastelands. Results showed that K. paniculata grew well in mine tailings, and also under a regime of equal amounts of mine tailings and soil provided in adjacent halves of pots. In contrast, mine sludge did not favor survival and growth because its clay texture limited fine root development. The bio-concentration factor and the translocation factor were mostly less than 1, indicating a low phytoextraction potential for K. paniculata. K. paniculata is suited to restore manganese mine sludge by mixing the mine sludge with local mine tailings or soil.
在矿山荒地上种树是对重金属污染废弃物进行植物修复的一种有效且长期的技术。在本研究中，设计了一个盆栽试验，用栾树幼苗在六种当地矿山废弃物处理条件下进行试验，以确定树木定植的主要限制因素，并评估在锰矿荒地上种植栾树的可行性。结果表明，栾树在矿山尾矿中生长良好，在花盆相邻两半分别提供等量矿山尾矿和土壤的条件下也生长良好。相比之下，矿山污泥不利于其存活和生长，因为其粘土质地限制了细根发育。生物富集系数和转运系数大多小于1，表明栾树的植物提取潜力较低。通过将矿山污泥与当地矿山尾矿或土壤混合，栾树适合用于修复锰矿污泥。
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