Magnetic properties recording sources, behaviors and fates of anthropogenic Cd, Pb, Cu and Zn in the

来源 :The 17th International Conference on Heavy Metals in the Env | 被引量 : 0次 | 上传用户:ljdoctor
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
  Discharge of heavy metals(HMs)from mining activities and industrial sources constitute a hazard to human health.Here,the environmental magnetic features are introduced to recording the source,behavior and fate of Cd,Pb,Cu and Zn from the Dabaoshan Mine,being a well–known rich polymetallic sulfide deposit in the Hengshi River catchments(South China).The spatial distributions of the four metals from anthropogenic activities on the soil surface(a depth of about 30cm)were delineated and separated from those areas where it results from lithogenic origin by combined exploratory data analysis(EDA),sequential indicator co-simulation(SIcS)and the ratio of isothermal remnant magnetization(S100=?IRM?100mT/SIRM).The results of magnetic properties(χlf,χARM,IRM20,50,100,SIRM,HIRM and χARM/SIRM)indicated anthropogenic source proportions of Cd,Pb,Cu and Zn in soils were 50.19%,12.54%,21.07%and 8.04%,respectively.Using the non-metric multidimensional scaling(NMDS)method,the interpret variables was ranked by χlf > slope> elevation>TOC>AMP>pH>D50 >△NDVI%.It suggests that soil erosion and parent material bearing iron content have controlled the transportation and deposition of the four metals in the catchments.The risk assessment codes coupled with bioavailable metal concentrations revealed that Zn could uptake directly by crops and a hazard to groundwater be posed by Cd and Pb in the bioavailable hotspots,such as the riparian regions and the Xiaba agricultural system.The studies showed that the responses of magnetic properties were sensitive to the historical behaviors of HMs pollution in multiple scales.It helps to provide the accurate and important details for controlling pollutants,soil remediation and making hierarchical risk management.
其他文献
本论文对新型超分子插层结构紫外阻隔材料进行了可控制备及结构与性能的研究。根据水滑石(LDHs)晶体结构的特点,充分考虑LDHs的粒径对紫外阻隔的影响,获得了不同粒径的晶体颗
DNA复制的严谨性和准确性对于遗传信息的传递有重要的作用,微小染色体维持蛋白复合物(MCM complex)是由六个亚基组成的六聚体,在真核细胞的DNA复制过程中起解旋酶的作用。在DNA损
  As the “Mercury capital” in China,Hg pollution in Wanshan Hg mining area is serious though large-scale state owned Hg mining activities were completely sh
会议
  Mercury emitted from coal combustion has attracted more and more attention.The activated carbon(AC)injection is a commercially available technology for clea
会议
随着科学技术的迅速发展,在进行工业、农业、地质、环境、生物等样品分析时,常常需要测定痕量、甚至超痕量的组分,并且要求分析方法简便、快速、灵敏、准确和重现性好。然而,在实
  Background: Metals mining contributes to increased concentrations of metals in the environment,thereby increasing the risk of metals exposure to populations
会议
紫罗兰酮具有重要的商业应用价值,通常采用假性紫罗兰酮的催化环化反应合成,催化剂为液体酸。采用固体酸催化剂能够有效解决由于液体酸的使用所造成的分离过程复杂和环境污染等
本实验以异丙隆为研究对象,在获得异丙隆抗体的基础上,建立了间接竞争和生物素-亲和素酶联免疫分析法(BAS-ELISA)。   建立了异丙隆的间接竞争ELISA法。用方阵滴定对包被抗
首先采用丙烯酸将不同聚合度的聚乙二醇酯化,寻找出聚合度不同的聚氧乙烯基烯丙酯大单体的合成条件,制备出合成聚羧酸系高效减水剂要求的不同聚合度的聚氧乙烯基烯丙酯大单体。
染料敏化太阳能电池(DSSC)主要由二氧化钛光阳极、电解液和对电极三部分组成,对电极是决定其性能和成本的关键部分。铂(Pt)电极因其较高的导电性和对多数氧化还原电对的高催化活性最被早用作DSSC对电极,但其高昂的成本不利于其广泛应用。本文采用电化学方法制备了导电聚噻吩及其衍生物和导电聚吡咯,将其作为DSSC对电极并进行光电性能测试。通过扫描电镜、红外光谱测试仪、四探针测试仪、X射线光电子能谱仪等测