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1.
对昆明西郊行道绿化植物“五毒”重金属元素含量特征进行了分析,结果显示,在地道绿化植物中,元素含量的相对离散度为Cd〉As〉Hg〉Cr〉Pb,与含量变化顺序不匹配,元素间仅Pb与Cr呈现十分正相关。  相似文献   

2.
对昆明西郊行道绿化植物"五毒"重金属元素含量特征进行了分析.结果显示,在行道绿化植物中,元素含量的相对离散度为Cd>As>Hg>Cr>Pb,与含量变化顺序不匹配,元素间仅Pb与Cr呈现十分正相关,其余元素间未达显著相关水平,与世界、西藏植物元素含量范围相对照,测试植物中As、Pb、Hg含量的超标率分别达70%、90%、70%.  相似文献   

3.
青海歧穗大黄根部重金属元素特征   总被引:1,自引:0,他引:1  
为对比青海高原境内不同生境歧穗大黄中七种重金属元素特征,用原子吸收仪进行了分析测试.结果表明,青海歧穗大黄根部Pb元素含量具有随着海拔高度增加而降低的变化特征.  相似文献   

4.
分析了青海达坂山地区16种高山植物重金属元素含量。结果表明,9种重金属元素中Cr、Ni、CO3种含量高于陆生植物的正常含量值;Hg含量极少,在检测限以下;其余5种含量正常;同种元素含量种间差异不大,不同植物对于同种元素的累积比较均一,各种植物对As、Se、Sb3种元素的富集能力高于其它元素;植物中CO与Cr、Sb;Pb与Cd之间有很好的协同作用,而Se与Co、Cd、Sb有明显的拈抗作用。相关分析的结果表明,植物对重金属元素的吸收受土壤元素含量的影响。  相似文献   

5.
原子吸收光谱法测定植物叶中微量重金属   总被引:2,自引:0,他引:2  
用浓硝酸与高氯酸混酸消解植物叶,其中铜、锌及锰含量较高,可直接用火焰原子吸收光谱法测定;铅、镉及铬含量较低,用石墨炉原子吸收光谱法测定;铅和镉含量甚微,受基体及共存元素干扰严重,用标准加入法消除干扰。  相似文献   

6.
青海湖区河谷灌丛主要植物微量元素含量特征   总被引:2,自引:0,他引:2  
采集青海湖地区沙柳河河谷灌丛14种主要植物,采用AAS分析了其中7种微量元素含量。结果表明,元素Cu、Mn、Co含量有较大的植物种问差异,7种微量元素中Se含量最小,Fe含量最大。元素Mn和Fe、Co、Ni之间都具有极显著的正相关性,即相互之间具有协同性作用。  相似文献   

7.
青海种植山茛菪根部重金属元素特征   总被引:1,自引:0,他引:1  
采集2~7年生人工种植山莨菪,用原子荧光光谱仪测定了镉、砷、汞,原子吸收光谱仪测定铅。结果表明,2—7年生种植山莨菪在每年9月份中,4种重金属元素含量水平由高到低依次为:砷、镉、铅、汞;铅和镉、砷和铅、且砷和镉之间均存在一定相关性。各种重金属的含量随着年份和生物量的增加而有所积累。  相似文献   

8.
用植物叶片中重金属元素含量指示大气污染的研究   总被引:29,自引:0,他引:29  
通过对潮州市区交通繁忙路段和对照区 (红山森林公园 )不同植物叶片重金属元素 (Pb、Cd、Cu、Zn)的含量研究 ,探讨了重金属含量与城市大气污染之间的关系。结果表明 ,植物叶片中的重金属元素富积量和大气中污染指数正相关。植物叶片的重金属元素富积量可较好和客观地指示市区大气的重金属污染状况。该研究为城市规划和环境保护提供了科学依据  相似文献   

9.
青海柴达木地区植物白刺叶中微量元素特征   总被引:7,自引:0,他引:7  
青海柴达木地区分布有丰富的白刺植物资源。利用220FS原子吸收光谱仪分析了该地区三种白刺叶片的Cu,Zn,Fe,Mn,Cr,Ni,Cd等微量元素。结果表明,铬、 锰含量显著提高是青海柴达木地区植物白刺叶资源微量元素特征。这为柴达木地区白刺叶资源的开发利用提供科学依据。  相似文献   

10.
佛山市蔬菜中若干重金属元素含量调查与分析   总被引:7,自引:0,他引:7  
对广东佛山市蔬菜中重金属含量进行了调查与分析。结果表明,蔬菜中重金属元素含量取决于蔬菜种类和土壤环境,佛山市蔬菜中重金属元素含量基本上是正常的,仅个别样点土壤受污染,蔬菜重金属元素含量异常。蔬菜中重金属元素含量由高到低顺序大体上是:叶菜类,瓜果类蔬菜,根菜类蔬菜。蔬菜必需元素锌、铜含量比汞、镉、铅、铬、镍等非必需元素含量高。  相似文献   

11.
Existing levels of chlorinated hydrocarbon residues and heavy metal concentrations in the tissue reservoir of several fish species in the Cold Lake area of Western Canada were investigated. An attempt was made to correlate bioccumulations with feeding habits of the fish.  相似文献   

12.
城市工业区土壤重金属元素影响评价   总被引:6,自引:0,他引:6  
选择成都某热电厂,利用X荧光分析法对其表层土、深层土四种重金属元素进行了定量分析,并与成都郊区北湖周边土壤和2004年同点采集土壤对比。研究表明,热电厂表层土存在重金属污染,且某些重金属含量有逐年增加的趋势;另外,土壤中Pb、Zn含量明显受工业活动影响,高于郊区土壤。  相似文献   

13.
Abstract

Extractable contents of heavy metals such as Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb and Bi in soil and plant tissue samples (fruit, leaf, twig and root) collected, along a distance of 1100 m to the West, from the surroundings of a metallurgical factory producing mainly zinc, cadmium and lead were determined by flame atomic absorption spectrometry (FAAS). In addition, the determinations of Ca and Mg, macro nutrient elements for plants, were also performed. Three extractant solutions were used for dissolution of soil samples, namely aqua regia (1 HNO3+ 3 HCl) for total metal analysis, 1 mol L?1 ammonium acetate for exchangeable metal contents, and a dilute acid mixture (0.1 M HCl in 0.025 M H2SO4) for acid soluble metal contents. A mixture of HNO3 and HClO4 was used to analyze the fruit samples. The analyses of the leaf, the twig, and the root tissue samples were made by dry ashing method. The detection limits of the metals were in the range of 0.04 to 0.45 μg/mL for all soil extracts and 0.01 to 1.50 μg/mL for the fruit samples. The recovery values for all the determinations were higher than 95%. The results obtained from the analyses of plant tissue and soil samples were evaluated using linear correlation analysis and concentration factors to identify the effect of the factory near the grape-vine area.  相似文献   

14.
Accumulation of heavy metals (HMs) by ornamental plants (OPs) from contaminated agriculture soils is a unique technique that can efficiently reduce the metal load in the food chain. Amaranthus tricolor L. has attractive characteristics acquiring a higher growth rate and large biomass when grown at heavy metal contaminated soils. Site-specific detailed information is not available on the use of A. tricolor plant in metal phytoremediation from the polluted sites. The study aimed to enhance the uptake of HMs (Pb, Zn, and Cu) via amending poultry litter extract (PLE), vinasse sugarcane (VSC), and humic acid (HA) as natural mobilized organic materials compared to ethylene diamine tetraacetic acid (EDTA), as a common mobilized chemical agent by A. tricolor plant. The studied soils collected from Helwan, El-Gabal El-Asfar (Cairo Governorate), Arab El-Madabeg (Assiut Governorate), Egypt, and study have been conducted under pot condition. Our results revealed all organic materials in all studied soils, except EDTA in EL-Gabal El-Asfar soil, significantly increased the dry weight of the A. tricolor plant compared to the control treatment. The uptake of Pb and Zn significantly (p > 0.05) increased due to applying all organic materials to the studied soils. HA application caused the highest uptake as shown in Pb concentration by more than 5 times in Helwan soil and EDTA by 65% in El-Gabal El-Asfar soil while VSC increased it by 110% in El-Madabeg soil. Also, an increase in Zn concentration due to EDTA application was 58, 42, and 56% for Helwan, El-Gabal El-Asfar, and El-Madabeg soil, respectively. In all studied soils, the application of organic materials increased the remediation factor (RF) than the control. El-Madabeg soil treated with vinasse sugarcane gave the highest RF values; 6.40, 3.26, and 4.02% for Pb, Zn, and Cu, respectively, than the control. Thus, we identified A. tricolor as a successful ornamental candidate that, along with organic mobilization amendments, most efficiently develop soil health, reduce metal toxicity, and recommend remediation of heavy metal-contaminated soils. Additionally, long-term application of organic mobilization amendments and continued growth of A. tricolor under field conditions could be recommended for future directions to confirm the results.  相似文献   

15.
通过盆栽实验研究了铅(Pb)、镉(Cd)、铜(Cu)、汞(Hg)和砷(As)污染条件下,温郁金和种植土壤中重金属含量,分析了植物对重金属的吸收富集能力。结果表明,随着土壤中污染物的投加量增强,Cu、Pb、Cd、As元素主要集中在根部,而Hg元素由于其极易挥发的特性,其块根中含量反而随着Hg投加量的增加而减小。温郁金对不同元素的吸收富集能力不同,对Cd的富集能力最强,对Hg的富集能力最弱。  相似文献   

16.
浙江省主要城市市场中的水产品重金属含量调查研究   总被引:7,自引:0,他引:7  
对浙江省主要城市市场上销售的水产品进行了调查。结果表明,这些水产品存在重金属的污染,主要的污染元素为Cd、As,超标率分别为4.3%、3.6%。其中,As的污染较为普遍,Cd的污染虽然超标率较高,但潜在污染增长趋势不明显。Pb的潜在污染增长趋势较强,应当密切监控养殖环境中的Pb污染。  相似文献   

17.
广东地产中药中几种重金属元素的含量测定   总被引:2,自引:0,他引:2  
通过火焰原子吸收分光光度法对十三种广东地产中药中锰、镍、锌、铜、铅和镉等重金属元素含量进行了测定 ,以初步了解广东地产中药的重金属含量情况  相似文献   

18.
探讨了土壤中重金属检测能力验证的质量控制措施,为确保能力验证结果的准确性及不断提高实验室的检测技术水平提供参考.  相似文献   

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