山东省烟台地区土壤重金属的生态效应——以砷为例   总被引：4，自引：0，他引：4       下载免费PDF全文

王存龙庞绪贵  胡圣虹郑伟军刘华峰  曾宪东 《中国地质》2011,38(6):1620-1630

烟台市是山东半岛蓝色经济区核心城市之一,通过对山东省烟台市生态地球化学资料的系统整理,研究土壤重金属污染现状与分布迁移规律,发现土壤主要污染因子是As、Cd、Hg、Cu、Pb、Zn等重金属元素污染,工矿三废排放是土壤重金属污染的主要原因;主要致污因子砷是环境中毒性最大的有害元素之一。土壤-苹果树体系中As迁移及形态转化规律为:植物根系吸收土壤中的砷,并在根部发生了AsⅤ→AsⅢ的还原作用,由植物的根部向上迁移过程中,AsⅢ的比例逐渐降低。砷在根系土-植物体系中的分布为:根系土>根>叶子>茎>苹果。  相似文献   

原子荧光光度法测定地化样品砷不确定度评定   总被引：1，自引：0，他引：1  

韦克桥  宋江伟  张代云  艾靖娇  黎红波 《云南地质》2011,30(1):95-98

测定过程中的不确定度分量分析,并计算各分量标准不确定度及合成不确定度。通过合成标准不确定度,得出测量结果的扩展不确定度及最终结果表示:(14.8±0.50)μg/g。  相似文献   

鄂东南矿集区土壤砷环境地球化学特征   总被引：1，自引：1，他引：1  

闭向阳  马振东  任利民 《物探与化探》2003,27(6):480-483

对鄂东南矿集区的山间盆地、长江冲积平原和低山丘陵地形土壤As的系统测定表明;土壤母质是影响土壤As区域背景值的主要因素,在相同的地理和气候条件下,土壤的pH、E_h值是控制土壤As垂向分布的重要条件之一;矿集区内土壤As污染主要有自然污染和人为污染,两类污染土壤在As含量垂向分布及土壤pH等理化性质上有着明显的区别.  相似文献   

应用ICP-AES法测定地质样品中的砷和锑   总被引：3，自引：0，他引：3  

胡郁  孟红  苏丹 《吉林地质》2007,26(3):62-64,67

本文采用ICP-AES方法,对地质样品中砷、锑的测定进行了研究,建立了一种准确测定土壤及金矿化岩石样品中砷、锑的方法。该方法准确、简便、快捷,采用基体匹配法消除了大量基体的干扰。而且,克服了常规原子荧光方法不能达到的高含量测定范围。此方法对5个国家标准样品进行了验证,12次测定精密度小于6%。  相似文献   

特提斯喜马拉雅带东段哲古错含金（砷）细粒石英闪长岩的发现及其意义     

边千韬  丁林 《岩石学报》2006,22(4):977-988

在特提斯喜马拉雅带东段哲古错中低温热液型锑-金矿床内首次发现了含金(砷)细粒高镁石英闪长岩,它们呈岩脉或岩枝状侵入于上三叠统—下侏罗统黑色页岩中。矿区内及外围有许多辉长岩脉及少量橄榄二辉岩小岩体产出。含金(砷)细粒高镁石英闪长岩主要为细粒结构,其次为斑状结构,具有与高镁埃达克岩相似的地球化学特征,表现为:SiO_2≥56%,高Al_2O_3(＞15%)、高MgO(Mg~#值为48～59),高Cr(75×10~(-6)～130×10~(-6))、高Ni(54×10~(-6)～74×10~(-6)),富集LILE,亏损HREE及HFSE,(La/Yb)_N＞12,Eu弱负异常(δEu=0．81～0．91),Sr含量较高且变化大(209．28×10~(-6)～685．14×10~(-6),平均381×10~(-6))、低Y和Yb,Y＜16×10~(-6),Yb＜1．7×10~(-6),具有平坦的HREE配分型式,(Ho/Yb)_N≈1,Sr/Y值较高且变化大(14．58～47．28,平均24)。Nd-Sr-Pb同位素组成特征为:高I_(Sr)(0．709726～0．711203),ε_(Nd)(t)弱负(-3．08～-1．15),Pb同位素组成变化幅度不大,~(206)Pb/~(204)Pb=18．638～18．672,~(207)Pb/~(204)Pb=15．694～15．702,~(208)Pb/~(204)Pb=38．983～39．016。含金(砷)细粒高镁石英闪长岩的K-Ar年龄为42．54±0．94Ma和43．21±1．14Ma,其岩浆可能是由地球化学性质类似于哲古错辉长岩的底侵玄武质下地壳部分熔融形成的,此底侵玄武质岩浆源自轻度富集EMⅡ物质的大陆下岩石圈地幔,于晚侏罗世底侵到下地壳。距今65Ma前,印度板块与欧亚大陆碰撞,地壳逐渐加厚。约43Ma前,地壳加厚到40km以上,同时发生了构造事件,诱发玄武质下地壳熔融形成含金(砷)细粒高镁石英闪长岩岩浆,此岩浆与构造活动耦合上升到地壳浅部成岩成矿。细粒高镁石英闪长岩是对金成矿有利的岩石,并且赋存有斑岩型金(砷)矿(化)体,指示特提斯喜马拉雅东段可能存在斑岩型金矿带;同时,含金(砷)细粒高镁石英闪长岩的发现对特提斯喜马拉雅带构造-岩浆作用及地球动力学研究也有意义。  相似文献   

Exposure and bioavailability of arsenic in contaminated soils from the La Parrilla mine, Spain     

H. M. Anawar  A. Garcia-Sanchez  A. Murciego  T. Buyolo 《Environmental Geology》2006,50(2):170-179

Arsenic derived from mining activity may contaminate water, soil and plant ecosystems resulting in human health and ecotoxicological risks. In this study, exposure assessment of arsenic (As) in soil, spoil, pondwater and plants collected from the areas contaminated by mine tailings and spoils in and around the La Parrilla mine, Caceres province, Spain, was carried out using AAS method. Water solubility, bioavailability and soil–plant transfer coefficients of As and phytoremediation potential of plants were determined. Arsenic concentrations varied from 148 to 2,540 mg/kg in soils of site 1 and from 610 to 1,285 mg/kg in site 2 exceeding the guideline limit for agricultural soil (50 mg/kg). Arsenic concentrations in pond waters varied from 8.8 to 101.4 μg/l. High concentrations of water-soluble As in the soils that ranged from 0.10 to 4.71 mg/kg in site 1 and from 0.46 to 4.75 mg/kg in site 2 exceeded the maximum permitted level of water-soluble As (0.04 mg/kg) in agricultural soils. Arsenic concentrations varied from 0.8 to 149.5 mg/kg dry wt in the plants of site 1 and from 2.0 to 10.0 mg/kg in the plants of site 2. Arsenic concentrations in plants increased in the approximate order: Retama sphaerocarpa < Pteridium aquilinum < Erica australis < Juncus effusus < Phalaris caerulescens < Spergula arvensis in site 1. The soil–plant transfer coefficients for As ranged from 0.001 to 0.21 in site 1 and from 0.004 to 0.016 in site 2. The bioconcentration factor based on water-soluble As of soil varied from 3.2 to 593.9 in the plants of site 1 whereas it varied from 2.1 to 20.7 in the plants of site 2. To our knowledge, this is the first study in Europe to report that the fern species P. aquilinum accumulates extremely low contents of As in its fronds despite high As levels in the soils. Therefore, the S. arvensis, P. caerulescens and J. effusus plant species grown in this area might be used to partly remove the bioavailable toxic As for the purpose of minimization of mining impacts until hypothetical hyperaccumulating and/or transgenic plants could be transplanted for the phytoremediation of As contaminated soils.  相似文献   

超声提取-氢化物发生-原子荧光光谱法测定水系沉积物中As(Ⅲ)和As(Ⅴ)   总被引：1，自引：1，他引：0  

肖芳  汤志勇  郝志红  帅琴  郑洪涛  邱海鸥 《岩矿测试》2011,30(5):545-549

在50℃条件下,使用4.8 mol/L HCl超声提取水系沉积物中的As,氢化物发生-原子荧光光谱法测定As(Ⅲ)和总As的含量,用差减法计算As(Ⅴ)的含量。实验了柠檬酸、柠檬酸钠、草酸、草酸钠、酒石酸和酒石酸钠对As(Ⅴ)的掩蔽效果,通过控制合适的介质酸度选择性地测定As(Ⅲ)。结果表明,柠檬酸钠掩蔽As(Ⅴ)的效果最佳,且As(Ⅲ)有较高的灵敏度;超声提取30 min,柠檬酸钠浓度为6 g/L,测定酸度为0.24 mol/L时可获得最佳测定效果,降低了测定时As(Ⅴ)对As(Ⅲ)产生的信号干扰。方法检出限为0.41μg/L,相对标准偏差为1.33%(n=11),标准曲线线性范围为1.5～250μg/L。As(Ⅲ)和As(Ⅴ)的加标回收率分别为82.7%～95.3%和96.1%～107.6%。方法操作简便快速,准确度高,分析成本低,应用于水系沉积物中As(Ⅲ)和As(Ⅴ)的价态分析测定,获得了满意的结果,可满足大批量地质样品的分析要求。  相似文献   

恩施富硒茶叶中Se含量与对应土壤中Se及重金属元 As、Cd、U的关系   总被引：1，自引：0，他引：1  

李慧  魏昌华  鲍征宇  郭宇  马真真  王海燕 《地质科技情报》2011,30(3):103-107

采用氢化物—原子荧光分光光度法(AFS)对恩施芭蕉地区玉露茶园不同坡度的茶叶、土壤样品中的Se及重金属元素Cd、U的质量分数分别进行了测试.研究了恩施富硒茶叶中的Se与As质量分数的关系以及其Se质量分数与其种植土壤中的Se质量分数和重金属元素Cd、U质量分数的关系,旨在为恩施富硒茶叶的种植提供依据.研究表明:在w(S...  相似文献   

铜锌冶炼废水中砷含量的分析方法     

雷皓  陈燕明  李雅贤 《云南地质》2021,(1):133-136

采用国标方法DDTC-Ag分光光度法测定铜锌冶炼废水中砷的含量,通过改变酸度、锌粒重量和比色皿厚度等条件,最终确定试验最佳参数为硫酸(1+1)4ml、10目~20目的无砷锌粒和20mm比色皿,据此,该方法能提高铜锌冶炼废水中砷含量分析的准确度。  相似文献   

Phytoremediation of Sb,As, Cu,and Zn from Contaminated Water by the Aquatic Macrophyte Eleocharis acicularis     

Nguyen Thi Hoang Ha  Masayuki Sakakibara  Sakae Sano 《洁净——土壤、空气、水》2009,37(9):720-725

Sb, As, Cu, and Zn toxicity and contamination have become a growing concern in recent years. Phytoremediation, a plant based and cost effective technology, may be an effective approach in the cleanup of water contaminated by these metals. In this study, the aquatic macrophyte Eleocharis acicularis was used in laboratory and field experiments to assess its capability to accumulate Sb, As, Cu, and Zn, and thereby investigate its potential application in phytoremediation. The results showed that E. acicularis adapted well to water contaminated by these metals. The removal rates of Sb, As, Cu, and Zn in the laboratory experiment were 3.04, 2.75, 0.417, and 1.49 μg/L/day, respectively. The highest concentrations of these metals accumulated in E. acicularis after 10 days of the laboratory experiment were 6.29, 6.44, 20.5, and 73.5 mg/kg dry weight, respectively. Only 8% of As, 12% of Sb, 87% of Cu and 93% of Zn removed from the water were used by E. acicularis. The highest concentrations of Sb, As, Cu, and Zn accumulated in E. acicularis after 10 wk of the field experiment were 76.0, 22.4, 33.9, and 266 mg/kg dry weight, respectively. The results indicate that E. acicularis has the ability to accumulate Sb, As, Cu, and Zn from contaminated water.  相似文献