Removal of Mercury from Polluted Waters by the Water Hyacinth (Eichhornia crassipes)

The uptake of mercury by water hyacinth (Eichhornia crassipes) was studied in an outdoor experiment for 25 days at different metal concentrations. the removal of mercury from the water and uptake by plants was very effective during the first hours and decreased rapidly thereafter. the uptake of mercury was directly proportional to the initial concentration in the water. the highest concentrations were found in plant roots. According to the results, water hyacinth could be used for treatment of mercurial waste waters.     

扩散管在大气汞分析中的应用

本文叙述一种分离大气中气态汞和颗粒态汞的扩散管采样方法 ,将它与传统的滤膜过滤法测得的结果进行比较。当使用 6 0 0 mm长的扩散管 ,采样流速为 1L· m in-1时 ,它对气态汞的采样效率可达 99%以上     

在原子吸收分光光度计上测定汞

利用原子吸收分光光度计上的燃烧头稍改进原子化和气路就可测定汞。该法具有灵敏度高,精密度和准确度均较好,操作简单,基本上自动化等优点。     

市政污水管网中汞污染来源行业浅析

城市污水管网中的涉汞行业,主要包括医疗机构、电器设备及器材制造业、化学原料及化学制品制造业、印刷行业等.明确各行业预处理和排放情况,并对几种典型的涉汞行业排汞与生产使用环节的关系作了分析.北京市高碑店流域包括北京市东城区、崇文区、朝阳区全部和西城区及宣武区的大部分,以高碑店流域为倒,对流域内各涉汞行业进行了统计分类,说明部分行业的汞化合物排放浓度.并提出了城市污水汞污染防治的对策和建议.     

Application of KCl-denuder for measuring gas-phase mercuric species(Hg~(2+))in atmosphere

ＡｐｐｌｉｃａｔｉｏｎｏｆＫＣｌｄｅｎｕｄｅｒｆｏｒｍｅａｓｕｒｉｎｇｇａｓｐｈａｓｅｍｅｒｃｕｒｉｃｓｐｅｃｉｅｓ（Ｈｇ２＋）ｉｎａｔｍｏｓｐｈｅｒｅＷｅｉＳｈｉｑｉａｎｇＣｏｌｅｇｅｏｆＥｎｖｉｒｏｎｍｅｎｔａｎｄＲｅｓｏｕｒｃｅｓ，Ｓｏｕｔ...     

脉冲放电法消除汞蒸气的实验研究

利用窄脉冲电方法来消除垃圾焚烧炉烟气中的汞蒸气，并进行了１０ｍ＾３／ｈ烟气的工业性实验，汞蒸气的减少率η随气体温度的增加而减小，并与气体在电场中的停留时间ｔ、脉冲电压频率ｆ以及电晕功率Ｐ有关系式η１－ｅｘｐ（－ｋｆＰｔ）成立，对于初始浓度为２ｍｇ／ｍ＾３的汞蒸气，在一定条件下可达１００％的消除率。     

节能灯生产过程中的环境事故风险分析

文章对节能灯生产过程中以汞污染为代表的事故风险进行了分析,讨论并指出了生产过程中存在的事故隐患及切实有效的防范措施,对及时采取应急防护和监测提供基础资料,为预防环境污染事故发生提供了很好的借鉴意义.     

松花江水中总汞的时空分布研究

为研究松花江水中总汞含量的时空分布特征,分别于2005年春汛期(4月)和夏汛期(8月)对松花江白山至同江江段进行了采样分析.结果表明,总汞含量为0.021～0.173μg·L-1,均值为0.096μg·L-1.总体上来讲,五棵树至白石江段江水中的总汞浓度较高.另外,由于附近金矿的汞排放,红石水库的总汞含量也较高,达到了0.111μg·L-1.总汞含量呈现明显的年内季节性变化和年际变化特征,主要表现为夏汛期总汞含量高于春汛期,1975～2005年总汞含量总体上呈下降趋势.经调查分析,沉积物再悬浮作用及其向水中的汞释放是导致松花江水总汞时空分布变化的主要原因,江水中较高的汞含量可能仍将维持较长的时间.     

半封闭溶样冷原子荧光法测定鱼体中的总汞

将半封闭混酸消化法与冷原子荧光法并用，对鱼体肌肉组织在95～140℃下进行消化并测定其总汞含量。实验结果检验表明．该方法精确度高。对于鱼汞国际标准样品（TORT-2，DORM-2）测定结果表明，实测结果与推荐值间的误差小于1．13％。是快速，准确地测定鱼体中总汞的理想方法。同时。此方法也适用于其它生物样品或沉积物和土壤中总汞的测定。     

Hydrocarbon and elemental carbon signatures in a tropical wetland: biogeochemical evidence of forest fire and vegetation changes

Evidence of changing vegetation in the tropical wetland (Rawa Danau, west Java, Indonesia) over the past 7428 years is illustrated by elemental (soot) carbon (EC) and n-alkane composition of sedimentary geolipids. In this study, vegetation changes and relevant controlling factors (e.g. forest fire and climate change) were documented on a decadal to centennial scale. The n-alkane composition that changes with depth might record changes in sources of organic matter (OM) in the wetland. The presence of EC (0.01–0.24% of organic carbon: OC) during late (0–1700 cal. year BP) and mid (3500–4500 cal. year BP) Holocene (at depths 0–50 cm, and 160–210 cm) indicated that large-scale forest fires severely affected the tropical vegetation. The hydrocarbon indices (CPI: carbon preference index, MCN: mean carbon number, and HVI: hydrocarbon vegetation index) significantly correlated with one another while a comparison of EC profile with the profiles of hydrocarbon indices indicated that n-alkane composition of the geolipid in lake sediment could record signatures of changes in catchment vegetation. Forest fire and vegetation changes might be related to regional climatic shifts relating to ENSO activity as well as being influenced by human influences.