In this paper, the sequential extraction procedure was used for the selection of fractions of lead in seven stages corresponding to lead exchangeable, lead bounded to carbonates, to manganese oxides, to organic matter...In this paper, the sequential extraction procedure was used for the selection of fractions of lead in seven stages corresponding to lead exchangeable, lead bounded to carbonates, to manganese oxides, to organic matters, to amorphous iron, and lead associated to crystallized iron, and to residuals. The vertical distributions of lead species were carried out in the soils related to good agriculture progress (GAP) of Chinese medical materials of Ligusticum chuanxiong Hort in Dujiangyan city and Wenchuan Co...展开更多
At the present manuscript,a brief report is given concerning heavy metals soil bioremediation methods and particularly phytoextraction by means of hyper-accumulator plants.The picking of the plants i.e.Thlaspi caerule...At the present manuscript,a brief report is given concerning heavy metals soil bioremediation methods and particularly phytoextraction by means of hyper-accumulator plants.The picking of the plants i.e.Thlaspi caerulescens should meet certain requirements according to already conducted experiments.Cultivations’data of the aforementioned Cd and Zn phytoaccumulator species are demonstrated.The last part incorporates a case study of a heavy metal-contaminated area nearby an abandoned lead-zinc mine located somewhere in NE(Northeast)Greece and a fundamental operational&cost analysis of the whole remediation project.展开更多
To screen out a series of ideal plants that can effectively remedy contaminated soils by heavy metals is the main groundwork of phytoremediation engineering and the first step of its commercial application on a large ...To screen out a series of ideal plants that can effectively remedy contaminated soils by heavy metals is the main groundwork of phytoremediation engineering and the first step of its commercial application on a large scale. In this study, accumulation and endurance of 45 weed species in 16 families from an agricultural site were in situ examined by using the pot-culture field experiment, and the remediation potential of some weed species with high accumulation of heavy metals was assayed. The results showed that Solanum nigrum and Conyza canadensis can not only accumulate high concentration of Cd, but also strongly endure to single Cd and Cd-Pb-Cu-Zn combined pollution. Thus 2 weed species can be regarded as good hyperaccumulators for the remediation of Cd-contaminated soils. Although there were high Cd-accumulation in Artemigia selengensis, Znula britannica and Cephalanoplos setosum, their biomass was adversely affected due to action of heavy metals in the soils. If the problem of low endurance to heavy metals can be solved by a reinforcer, 3 weed species can be perhaps applied commercially.展开更多
针对目前植物修复中Cd Cu Zn Pb复合污染的超富集植物缺乏研究,采用小区试验方法,对东北沈阳地区9科18种田间杂草植物进行其积累特性的初步研究.结果表明:狼把草(Bidenstripartite)、龙葵(Solanumnigrum)地上部Cd和Zn的富集系数均大于1...针对目前植物修复中Cd Cu Zn Pb复合污染的超富集植物缺乏研究,采用小区试验方法,对东北沈阳地区9科18种田间杂草植物进行其积累特性的初步研究.结果表明:狼把草(Bidenstripartite)、龙葵(Solanumnigrum)地上部Cd和Zn的富集系数均大于1,且地上部Cd和Zn的含量大于根部Cd和Zn的含量,具备了重金属超富集植物的基本特征.杂草植物地上部重金属含量与植物地上部生物量的相关分析表明,这些植物对重金属的积累量与植物地上部生物量的大小无关,它们对重金属污染土壤修复具有重要意义.展开更多
基金The Natund Science Foundation of China (Grant 40103009)The Excellent Young Teachers Program of MOE, P R China (Grant 20011766)The China Postdoctoral Science Foundation (Grant 2002031270)
文摘In this paper, the sequential extraction procedure was used for the selection of fractions of lead in seven stages corresponding to lead exchangeable, lead bounded to carbonates, to manganese oxides, to organic matters, to amorphous iron, and lead associated to crystallized iron, and to residuals. The vertical distributions of lead species were carried out in the soils related to good agriculture progress (GAP) of Chinese medical materials of Ligusticum chuanxiong Hort in Dujiangyan city and Wenchuan Co...
文摘At the present manuscript,a brief report is given concerning heavy metals soil bioremediation methods and particularly phytoextraction by means of hyper-accumulator plants.The picking of the plants i.e.Thlaspi caerulescens should meet certain requirements according to already conducted experiments.Cultivations’data of the aforementioned Cd and Zn phytoaccumulator species are demonstrated.The last part incorporates a case study of a heavy metal-contaminated area nearby an abandoned lead-zinc mine located somewhere in NE(Northeast)Greece and a fundamental operational&cost analysis of the whole remediation project.
文摘To screen out a series of ideal plants that can effectively remedy contaminated soils by heavy metals is the main groundwork of phytoremediation engineering and the first step of its commercial application on a large scale. In this study, accumulation and endurance of 45 weed species in 16 families from an agricultural site were in situ examined by using the pot-culture field experiment, and the remediation potential of some weed species with high accumulation of heavy metals was assayed. The results showed that Solanum nigrum and Conyza canadensis can not only accumulate high concentration of Cd, but also strongly endure to single Cd and Cd-Pb-Cu-Zn combined pollution. Thus 2 weed species can be regarded as good hyperaccumulators for the remediation of Cd-contaminated soils. Although there were high Cd-accumulation in Artemigia selengensis, Znula britannica and Cephalanoplos setosum, their biomass was adversely affected due to action of heavy metals in the soils. If the problem of low endurance to heavy metals can be solved by a reinforcer, 3 weed species can be perhaps applied commercially.
文摘针对目前植物修复中Cd Cu Zn Pb复合污染的超富集植物缺乏研究,采用小区试验方法,对东北沈阳地区9科18种田间杂草植物进行其积累特性的初步研究.结果表明:狼把草(Bidenstripartite)、龙葵(Solanumnigrum)地上部Cd和Zn的富集系数均大于1,且地上部Cd和Zn的含量大于根部Cd和Zn的含量,具备了重金属超富集植物的基本特征.杂草植物地上部重金属含量与植物地上部生物量的相关分析表明,这些植物对重金属的积累量与植物地上部生物量的大小无关,它们对重金属污染土壤修复具有重要意义.
