污染地

In the collembolan community, Sinella, Onychiurus, Isotomurus are the dominance species, the frequencies are 37.26%, 31.6%,and 21.23%, respectively.2.In the agricultural ecology of Fuyang, the dominant species are Collembola and Acari. Their frequencies are 66.37% and 16.72%, respectively. Liposcelididae, Ceratopogonidae, Chironomidae, Staphylinidae, Nematoda, Enchytraeidae are common species.

弹尾目昆虫对重金属污染的反应，不同的种之间有很大的差别，其中，裸长角属对Cu污染反应不灵敏，陷等属、棘属对Cu污染反应敏感，随着污染程度的加剧，它们的数量明显减少；小等属和长属对Cu、Zn、Cd、Pb等重金属元素的复合污染反应很敏感，而裔符属、球圆属、土属、圆属和鳞长属对重金属复合污染反应很迟钝，在这些重金属复合污染严重的农田中仍能很好地生存繁衍。

Meanwhile, the concentration of Pb,Zn and other heavy metals is rather high in the oxidation zone and decreasesdownward to levels that are unbelievably low for Pb-Zn mine tailings. Theseobservations suggest that heavy metals should be re-immobilized by secondaryminerals, rather than primary minerals, in the oxidation zone, and could be leachedout from suboxic environment due to low rate oxidative dissolution which preventsthe precipitation of secondary minerals in significant amount. Thus, cover scenarioswhich establish a suboxic environment beneath the cover layer might not always beeffective in preventing heavy metal release from mine tailings.Sequential extraction studies indicate that, in addition to heavy metal leaching,oxidation of the mine tailings increased the mobility of residual Zn, and Cu, while Pb remains immobile due to the formation of anglesite (PbSO4). Using the seven-step extraction technique developed by Dold (J. Geochem. Explor., 2003, 80: 55-68), galena dissolves in significant amount at step 2 most probably due to the strong complexing of Pb2+ by acetate, while other metal sulfides dissolve at step 6, which suggest that this extraction technique could not be used to evaluate the mobility of lead in natural environment

重金属含量均低于新鲜尾矿，但以硬化层中的含量最高(Pb、Zn含量分别为0.47%和0.93%)，往下大幅度降低，表明尾矿风化过程中形成的次生矿物对Pb、Zn等重金属元素有较强的固定作用，而次氧化带的淋溶作用造成了金属元素的大量流失；(4)与新鲜尾矿相比，硬化层中铅的可迁移性大大降低，硬化层之下尾矿样品中铅的可迁移性也不同程度降低，这是由于硫化物氧化产生的硫酸根与尾矿中的铅反应形成铅矾(PbSO_4)的缘故；(5)氧化作用使尾矿中的zn、Cu等重金属的可迁移性不同程度地增大，其中对锌的可迁移性影响最大，铜的可迁移性与铁比较相似，铅则容易与硫化物氧化形成的SO_4~(2-)反应形成铅矾(PbSO_4)；(6)为了减少尾矿污染和修复矿山环境，人们提出了各种不同的尾矿覆盖方案，本文的研究结果表明，这些方法不一定能够有效地阻滞污染元素的迁移。

Cosmos bipinnatus and Trachymene coerulea exhibited stronger endurance to Pb, however, Pb contamination significantly inhibited Dianthus caryophyllus development, which exhibited the weakest enduring ability.

在Pb浓度为1000 mg kg^(-1)时，铅污染可以刺激波斯菊和翠珠花生长，使其根部和地上部的生物量增加，这两种花卉对铅污染的抗性很强，但铅污染会显著抑制香石竹的生长，香石竹对铅污染的抗性很差。

Cd contents in overground and underground part (0-10, 10-20cm) of 19 kinds of turf grasses which planted in Cd-contaminated soil were analyzed and determined.

方法］对种植在镉污染地19种草坪草的地上部分和地下部分(0~10、10~20cm)的含镉量分别进行了分析测定。

During the Sealing process it is beneficial to clean on a regular basis to prevent contaminants from staining or discoloring the floor.

在材料的密封过程中，可以防止污物污染地坪表面或使之褪色。

Rainbow pink, Vetiver grass, and Indian mustard were used in this study to test the remediation of the Cd, Zn, and Pb-contaminated soil. The objectives of this study are to assess the effect of applying EDTA on the phytoremediation of metals-contaminated soils and to assess the interactions among three metals in multiple metals-contaminated soils. Different applying methods with same amounts of EDTA are also used in this study to assess their effect on the metal concentration in the shoot of plant and on reducing the potential risk of groundwater contamination.

本研究於受镉、锌及铅污染的坋质黏土土壤中种植五彩石竹、培地茅及印度芥菜，利用此三种植物植生复育受多种重金属污染的土壤，污染土壤的镉、锌及铅浓度分别为20、500及1，000 mg/kg，评估施用EDTA对於促进植生复育的效果，并以镉、锌及铅浓度分别为10、100及1，000 mg/kg分别配制不同重金属污染土壤，研究三种重金属间交互作用对於植物累积重金属的影响，并评估以相同的EDTA施加总量分一至四次施用对植物累积重金属及降低地下水污染的风险的效果。

A geostatistical method was put forward to analyse the spatial variability of combined heavy metal pollution in soils based on GIS. The spatial analysis showed a combined Cu and Cd pollution occurred in the research area, Cu was mainly concentrated in surface layer, but Cd had high concentrations in 0-60cm depth of soil profile. The correlation analysis revealed that the point source pollution was dominated by the pollution let-out of the smeltery.

研究首先建立了基于GIS的地统计学采样和分析方法的步骤，然后着重分析了土壤铜镉复合污染的空间变异特征和影响因素，发现研究区土壤铜镉复合污染为点源污染类型，铜在土壤中具有明显的表聚性，而镉容易迁移，在0-60cm的土层中均形成污染，同时土壤的复合污染已经在水稻籽粒中引起污染物超过食品食用标准。

Environmental emergency is different from general pollution in its substantial outburst momentarily and its irregular outfalls.

突发性环境污染事故不同于一般的环境污染，它没有固定的排放方式及途径，是瞬时、大量地排放污染物质的恶性污染事故。

Based on the available knowledge of pollution ecology of mangrove combined with the data on tideland pollution in Guangdong Province the paper conducts a scientific judgment on whether some polluted tidelands in this Province can be sued for establishing mangrove plantations or not so as to provide a scientific guideline for selecting the species to suit a tideland or selecting a tideland to suit the species in constructing ecological and public welfare mangrove system along the coast of the Province at pre .

以现有的红树林污染生态学知识为依据，结合广东省潮间带滩涂污染状况的调查资料，对其中某些地点的潮间带是否可以营造红树林作出科学的判断，从而为广东省当前建立生态公益红树林体系选树适地和选地适树提供参考，同时阐明在污染潮间带营造红树林需要采取的科学步骤和提出急需解决的一系列科学问题以及建立红树林污染造林学分支学科的初步设想。

The result showed Putter,Merit,and Kentucky bluegrass,etc were optimal species for concentrating cadmium and reconstruct...

分析结果表明：普特、优异、结缕草草地早熟禾等草种对镉富集能力较强，是改造镉污染地的优良草种。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

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