Effects of field application of phosphate fertilizers on the availability and uptake of lead, zinc and cadmium by cabbage (Brassica chinensis L.) in a mining tailing contaminated soil

A field trial was conducted to evaluate the reduction of bioavailability of heavy metals including lead (Pb), zinc (Zn) and cadmium (Cd) in a soil contaminated by mining tailings in Shaoxing, Zhejiang, China. Three commercial phosphate (P) fertilizers including phosphate rock (PR), calcium magnesium phosphate (CMP), and single superphosphate (SSP) were applied to the plot at three P application rates, 50, 300, and 500 g/m2 with 9 treatments and control (CK). Plants, water soluble and exchangeable (WE) extra...     

Accumulation of Pb, Cu, and Zn in native plants growing on contaminated sites and their potential accumulation capacity in Heqing, Yunnan

Phytoremediation is one of the cost-effective and environmental friendly technologies used to remove contaminants from contaminated soils,which has been intensively studied during the last decade.Presently,few economical and effective remediation methods are available for the remediation of Pb contaminated sites.This study was conducted to assess the potential of 19 plants growing on contaminated sites in Pb mine area.Plants and associated soil samples were collected and analyzed for total metal concentrati...     

Alkaline leaching of metal melting industry wastes and separation of zinc and lead in the leach solution

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铅同位素研究新进展──“双稀释剂”测定方法和“AGSO-CSIRO”模式年龄

适当的仪器质量分馏校正是提高同位素分析数据精度的关键 ,重新“复活”了的铅同位素“双稀释剂”测定方法可实现严格的仪器质量分馏校正。以区域锆石U -Pb年龄为控制点的“AGSO -CSIRO”铅同位素模式年龄方法可获得精度很高的定年结果 ,铅同位素研究的应用必将因此而得到更大的发展。     

粗铅、还原铅生产硫酸铅新工艺

本文研究了由粗铅、还原铅生产硫酸铅的各种影响因素，并寻找出最佳的生产工艺条件。     

萃取--反萃取分离原子吸收光谱法测定海水痕量的铜锌铅镉

海水中的铜锌铅镉经氯仿乙酸丁脂萃取和硝酸反萃取得到与基体同时分离，用原子吸收光谱法分别测定反萃取液中的这四种金属。该法具有较低的检出限和较好的回收率，对海水测定可获较满意的结果。     

原子吸收光谱法最灵敏线下测定地面水中铅

探讨了原子吸收光谱法在铅的最灵敏线下测定地面水中铅的可行性,进而确定了其基本操作条件,并进行了方法比较.结果表明:选用水饱和的甲基异丁基甲酮 冰乙酸(1 1)进行吸光度调零可以消除分子吸收干扰,工作条件宜选择:灯电流1mA、狭缝宽度0.5mm、占空比1:3.5、燃烧器高度4～6mm、助燃气流量4L·min-1、燃气流量1.1L·min-1.用于地表水中铅的测定获得满意结果.灵敏度较国家标准分析方法提高了2.5倍.回收率为97.8%～103.4%.     

贵阳市大气铅镉镍污染现状初探

通过对大流量 2 4h连续采样的总悬浮微粒滤膜进行Pb、Cd、Ni金属元素浓度值测试分析 ,初步摸清了贵阳市大气总悬浮微粒中这三种金属元素的浓度范围、污染现状及形成原因。     

砷和铅对土壤酶活性的影响

研究了浙江省绍兴银山铅锌矿周围农田的污染情况及其对土壤酶活性的影响。该污染区域内主要的污染元素为砷和铅,其含量与区内土壤脱氢酶、过氧化氢酶、过氧化物酶、转化酶、脲酶和磷酸酶呈显著的复相关关系,其中砷的影响是主要的。土壤脱氢酶、过氧化氢酶和转化酶活性的变化能够反映供试土壤类型受砷和铅复合污染的程度。     

飞机草处理含铅废水的应用研究

用飞机草吸附废水中的铅离子，研究中探讨了影响吸附的主要参数，包括飞机草投加量、初始浓度、震荡时间、pH和温度。结果显示：用飞机草来吸附废水中的重金属离子，可以有效去除里面的铅离子，然后富集，重新得到金属达到废物利用、变废为宝的目的。