含重金属的尾矿渣场复垦还田种植农作物的安全技术
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  • 英文篇名:Safe Technology of Crops in Reclaimed Farmland of Heavy Metals Tail Slag Field
  • 作者:刘瑞平 ; 徐友宁 ; 张江华 ; 乔冈 ; 柯海玲 ; 陈华清 ; 何芳
  • 英文作者:LIU Ruiping;XU Youning;ZHANG Jianghua;QIAO gang;KE Hailing;CHEN Huaqing;HE Fang;Key Laboratory for Geo-hazards in Loess Area,MNR,Xi'an Center of China Geological Survey/Northwest China Center for Geoscience Innovation;
  • 关键词:尾矿渣场 ; 重金属 ; 复垦还田 ; 农作物 ; 安全试验
  • 英文关键词:tailing slag field;;heavy metals;;reclaimed farmland;;crops;;safety test
  • 中文刊名:XBDI
  • 英文刊名:Northwestern Geology
  • 机构:中国地质调查局西安地质调查中心/西北地质科技创新中心自然资源部黄土地质灾害重点实验室;
  • 出版日期:2019-06-05
  • 出版单位:西北地质
  • 年:2019
  • 期:v.52;No.212
  • 基金:国土资源公益性行业专项项目(2008334061、201111020);; 中国地质调查局项目(1212010741003、1212011220224);; 自然资源部矿山地质环境——陕西潼关野外基地联合资助
  • 语种:中文;
  • 页:XBDI201902029
  • 页数:11
  • CN:02
  • ISSN:61-1149/P
  • 分类号:242-252
摘要
含有毒重金属的尾矿渣场复垦还田的安全经济技术方法是目前国内外的难点。为了探索尾矿渣场复垦还田后,种植农作物的安全性和经济性,笔者开展了小秦岭金矿区尾矿渣场不同覆土厚度农作物种植试验研究。结果表明:尾矿渣为土壤、农作物重金属提供了丰富的物源,尾矿渣、土壤和农作物中重金属排序为Pb>Cd>Hg;成熟中后期的农作物内重金属超过国家标准的风险高于成熟早期,叶菜类、果实类蔬菜及粮食类作物的风险主要来自Hg、Pb、Cd;块根类蔬菜是比较安全经济的种植作物,其中萝卜、土豆、青菜的经济安全种植厚度应大于40cm、50cm、70cm,在最大覆土厚度90cm上种植其他农作物也是不安全的;种植农作物后,土壤中Pb、Cd减少量与尾矿渣上覆土厚度有一定相关性,而Hg元素还与自身的挥发性有关;农作物对重金属的选择与重金属在黄土中的迁移能力是影响农作物吸收重金属的重要影响因素。试验结果可为研究金矿尾矿渣复垦还田的安全技术方法提供借鉴作用。
        It is a difficult technique to reclaim the tailings contained toxic heavy metals in safe and economic method at home and abroad.In order to investigate the safety and economy of containing-toxic heavy metal slag field reclamation and planting crop,the authors study the relationship and the heavy metal content characteristics of the overlying soil,crops and soil covering thickness in the investigated in-situ tail slag.The results showed that the tail slag for soil and crop provides the rich heavy metals source.The heavy metals Pb is far higher than Cd and Hg in the tailing slag,soil and crops site conditions.Compared to the national standard,the heavy metals risk of crops in the mature-later is higher than the ones in the early maturity.The risk of leafy vegetables,fruit vegetable and grain crops are mainly from Hg,Pb and Cd three elements.And root vegetables is relatively safe and economic crops,the economic security thickness of radish,potatoes and vegetables planting is greater than 40 cm,50 cm and 70 cm,respectively.But the other crops planted at a maximum thickness of 90 cm are also unsafe.After planting crops,the Pb and Cd decreased values in soil have a certain correlation with the soil thickness above slag tail.But Hg element has so much to do with the soil thickness and its volatile.Both crops choice and heavy metal mobility are important influence factors for the heavy metals contents of corps.The results can provide a reference for the research of gold tailings reclamation.
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