查询词典 pollutants

The main pollutants that cause pollution to the soil in the process of production include the enduring organic pollutants PCBs, trichlorobenzene , HCB, cadimium and arsenium .

在生产过程中造成土壤污染的主要污染物包括持久性有机污染物PCBs、1，2，4-三氯苯和六氯苯，重金属镉和砷等。

The results showed: for the toxicity of two kinds of pollutants, the Cd(superscript 2+) is more poisonous that the Pd(superscript 2+). For the sensitivity to the pollutants, the P. caudatum, C cathayensi and D. japonica increase evidently in turn. The statistical analyses indicated that the single and combined toxicity effects both increase with the exposed time extended, especially for the combined toxicity (P.05), showing a marked time-effect relation. As for the single effect, ii increase prominently with Pb(superscript 2+) and Cd(superscript 2+) concentrations (P.05); But in the case of binary effect, the results showed obviously a time-effect (P.01) as well as a concentraction-effect relations.

结果表明：在同等条件下，Cd(上标 2+)对三者的致毒效应都明显强于Pb(上标 2+)；3种动物中，草履虫最敏感，而圆田螺耐受能力最强；随单一毒物浓度的增大以及暴露时间的延长，两者的致毒效应都显著增大，表现出明显的浓度－效应和时间－效应关系；二者复合作用时，对3种动物的致毒效应主要表现为与二组分的浓度比例有关。

In some areas, the risk levels of carbon trichloride, hexachlorobutadiene, carbon tetrachloride, chlorylene, tetracarp, trichloroethane , chloroform, gammexane and other pollutants all exceed 10-4, all above the harm value of 1, and these pollutants are likely to cause risks to human health.

而少数区域的六氯乙烷、六氯丁二烯、四氯化碳、三氯乙烯、四氯乙烯、1，1，2-三氯乙烷、氯仿和六六六等污染物风险等级均大于10-4，危害商均大于1，这些污染物均能对人体健康产生风险。

Environmental chemistry is an intersectant subject by environmental science and chemistry. Its core problem is to study the chemical transformation and effect of chemical pollutant in environment. The research object of environmental chemistry is a complicated system with many components and mediums. The content of chemical pollutants researched by environmental chemistry is very low. These chemical pollutants distribute extensively, move and transform quickly, and have obvious dynamic change under different space-time conditions.

环境化学是环境科学与化学的交叉学科，它的核心问题是研究化学污染物在环境中化学转化和效应；环境化学研究的对象是一个多组分、多介质的复杂体系；环境化学所研究的化学污染物在环境中的含量很低；化学污染物分布广泛，迁移转化速度较快，在不同时空条件下有明显的动态变化。

The results of the present research are as follows, The correlation between physico-chemical properties of organic compounds and their competitive power was studied, and it was indicated that organic compounds preferable to form H-bonding with organic matter of sorbents have stronger competitive power; Sorption behaviors of ionizable organic compounds in different species and their competitive power were examined, and the results showed that phenols and carbonxylic acids with benzyl circle have much stronger competitive power in molecular species than in ionized species, because negative charges of anionic forms can depressed their adsorption on the surface of the sediment; in contrast, organic bases such as aniline and p-chloroaniline show weaker competitive power in molecular species than in ionized species, and this is because both species of the organic bases could adsorb strongly onto the sediment; there is a correlation between competitive power of organic pollutants in multi-solute systems and their sorption isotherm nonlinearity in single-solute systems, and organic compounds whose sorption isotherms is linear in single-solute systems hardly have competitive power in multi-solute systems; Competitive sorption effects in more than two-solutes systems was studied, and it was exhibited that mixture of two cosolutes each of which could suppress sorption of nominal solute onto the sediment had synergistically competitive sorption effect on the nominal solute; A method about incorporating sorption/desorption of organic pollutants into river water quality model was developed, and discussion about degree of sorption/desorption effect on model prediction for different organic compounds was made, which will provide theoretical basis and practical processes for setting up more accurate water quality model.

论文主要取得了以下研究成果。(1)有机化合物的吸附竞争能力与其物化性质具有相关性，易与沉积物有机质形成氢键的化合物其竞争能力也比较强；(2)可离子化有机化合物的吸附竞争能力与其存在形态有关。酚类、含苯环的羧酸类化合物，其离子态的吸附竞争能力远小于分子态，其机理为有机酸阴离子所带的负电荷抑制了表面吸附能力，主要发生分配作用；而苯胺类化合物，其离子态和分子态都表现出显著的竞争能力，而且离子态的竞争能力略强于分子态，原因在于有机碱阳离子所带的正电荷促进了其表面吸附能力；有机化合物竞争能力的强弱与其单组分吸附等温线的非线性程度具有一定的相关性，吸附等温线近似为线性的化合物没有或只具有微弱的竞争能力；(3)对目标有机化合物的吸附具有竞争效应的有机化合物混合后，将对目标有机化合物的吸附产生协同竞争效应；(4)以京杭运河为例，率先提出了将有机污染物的吸附／脱附作用及水文水力参数耦合到水质模型中的方法，并讨论了吸附／脱附作用对不同有机污染物预测模型的影响，为建立更准确的水质模型及进行更客观的风险和生态评估提供了参考依据。

Nonuniformly mixed pollutants----For these pollutants, the damage they cause is a function not only of the amount of emissions, but also the location of the emissions sources.

非统一混合污染物——对于这些污染物，他们产生的损害不仅仅是排放总量所造成的，同样是排放源造成的。

There are two major ways for government to regulate the environmental pollution of companies. One is by legislative means which use law to obligatorily and directly control the treatment and discharge of pollutants. The other is by economic means which use subsidies, taxations, charge and emission trading to indirectly control the treatment and discharge of pollutants.

政府机构对企业环境污染进行管制的手段主要有两个：一是借助于法律手段，以立法的形式对企业污染物处理及排放进行强制性的直接管制；二是借助于经济手段，用补贴、征税、收费和排放权交易制度等形式对企业污染物处理及排放进行的间接管制。

Forbidden-band-width of mono-clinic phase of bismuth vanadate (mBiVO4) is high enough to 2.3-2.4 eV, it could be valence band to carry out entirely that hole band degrade organic pollutants,and the conduction band possesses high oxidizability to make for reduction of photoinduced electron,and oxidation potential of its valence band with 2.4 eV nearby could achieve decomposition of water and degradation of organic pollutants under visible light.

单斜晶相钒酸铋(mBiVO4)的禁带宽度为2.3 - 2.4 eV，它足够高的价带完全可以实现空穴对有机污染物的降解，并且导带位置也有利于光生电子的还原，具有较高的氧化能力，且其价带氧化电位位于2.4 eV附近，可实现在可见光下分解水和降解有机污染物。本文综述了mBiVO4应用于降解污染物、光解水产氧以及光电化学分解水的研究概况，及其在光催化降解有机物等领域的应用前景。

The main pollutants from this chemical plant is perchloroethane, pentachloroethane, hexachlorobutadiene and HCB, and such pollutants are present in the soil with high densities, some as high as 1%- 95%, of which the perchloroethane is near the purity of the corresponding product, and especially this part of the soil contains comparatively high-density persistent organic pollutant HCB, which makes it suitable to be disposed of together with other soils. Therefore it is suggest that this part of soil should be separately dug out and transported outside of the site.

化工厂的主要污染物质是六氯乙烷、五氯乙烷、六氯丁二烯和六氯苯，土壤中上述污染物的浓度非常高，有些达到1%至95%，其中六氯乙烷接近相应的产品的纯度，特别是这一部分含有较高浓度的持久性有机污染物六氯苯，不利于与其它土壤混合处理，建议将这一部分单独开挖出来并运出场外。

Long time, because the main city of Chengdu is located in the hinterland of Sichuan Basin, the seasonal high frequency of calm winds, temperature inversion strength, subject to a special geographical environment and climatic conditions, in a natural state, city over to respirable particulate matter, sulfur dioxide, represented by the proliferation of difficulties in dilution of air pollutants, resulting in a large number of pollutants in the basin, retention, accumulation.

长的时间，因为成都的主要城市是位于四川盆地，平静的季节风高频率的腹地，逆温强度，受特殊的地理环境和气候条件在自然状态，城市对可吸入颗粒物，二氧化硫，由空气污染物的稀释扩散代表的困难，在污染物在盆地，保存，造成大量积累。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了