查询词典 water pollution

The determination of hydrochemical facies type is a tool to control groundwater from pollution any deviation from background water facies can be related to pollution.

水化学类型的确定是研究地下水污染的有效方法，当某一地区的地下水化学含量与环境背景值相差较大时，即可以看作地下水受到了某种程度的污染。

We discuss the method of emergency monitor ing in pollution accident which happened in water,air,and soil by using GC-MS,on account of emergency pollution accident happened increasedly and the appropriate analysis method hav't been provided.

鉴于国内突发污染事故的不断增多而相应监测方法尚未完善的当前状况，为充分发挥气相色谱-质谱联用在定性、定量中的优势，在讨论气相色谱-质谱联用在水体、大气、土壤三类有机污染事故中的应急监测方法，并针对不同的污染物情况提出了相关的前处理方法、条件程序。

Based on the national tenth five magnitude project — Suzhou City Water Environment Improvement and Synthesize Demonstration item, we carried out the static simulation test and the dynamic simulation test under the condition of heavy pollution loading rate and low transparency and dissolved oxygen in polluted river of suzhou ancient city district. These investigations were on the base of the formers' work. We analyzed the purification effects and rules of plant floating-bed technology on polluted river water, and also applied the technology to purify the polluted river water in Miaojia River. Conclusions were summed up in the following:The dominance plant option test was carried out among Oenanthe javanica, Lolium mutliflorum and Allium sativum under low temperature condition. The results showed that the Oenanthe javanica was the dominance floating-bed plant under low temperature condition. Its net removal rate of TN、 NH_3-N、 TP、 COD_ were 51.3%、 65.2%、 55.6%、 57.6%, respectively, and inhibition rate of algae reached 92.3%.

本论文以国家863重大科技专项——&苏州市城市水环境质量改善与综合示范&项目为依托，在前人研究的基础上，根据苏州古城区污染河道污染负荷重、透明度及溶解氧低的实际情况，通过静态、动态模拟试验，研究了植物浮床技术对污染河水的净化效果及规律，同时在苏州古城区内的苗家河开展了植物浮床技术净化污染河水的示范应用，得出了以下结论：(1)低温条件下对水芹菜、多花黑麦草、大蒜三种浮床植物筛选的试验表明：水芹菜是低温条件下浮床植物的优势种，其对TN、NH_3-N、TP、COD_的净去除率分别为51.3%、65.2%、55.6%、57.6%，对藻类的抑制率达92.3%。

Results MC pollution was prevalence in Tongan source water, and the positive detected rate was 100% in reservoir water and 77.5% in shallow wall water. Oscillatoria rubescens was the dominant specie and Microcystis was the second.

结果 厦门同安农村饮用水水源普遍存在微囊藻毒素污染，夏季藻类生长高峰期，水库水微囊藻毒素检出率100%，浅井水检出率77.5%；同安水源中优势藻为颤藻，其次为微囊藻。

The Tuhai Rivers water is not suitable for water source for its serious pollution, four-grade water quality,overproof 80 times of COD.

近年来，徒骇河水污染已十分严重，据抽样化验，水质为四级，COD超标80倍，故不能将徒骇河水作为水源。

The results of research showed that compound ferrous flocculant has simple preparation and not any second pollution matter is produced to the environment, it has big and stout floes formation and fast speed sedimentation while dealing with waste water, it is positively charged according to the electrophoresis, it belongs to cationic flocculant, can gives better coagulation results in turbidity removal, color removal, the maximum removal rate of turbidity and color are 95.4% and more than 81.7%, respectively. There are interactions between polysilicic acid and hydrolyzed ferrous species, the compound ferrous with appropriate Si/Fe not only but also can lower the water treatment cost. The compound ferrous removes colloid particles in water by charge oxidation-reduction, neutralization and furl mechanism.

研究结果表明：复合亚铁制备工艺简便，无二次污染；处理水样时产生的矾花大，密实、沉降速度快；复合亚铁带电性为正，为阳离子型絮凝剂；复合亚铁具有较好的除浊、脱色能力，除浊率及脱色率最高分别可达95.4％及81.7％；在复合亚铁中，聚硅酸与亚铁的水解产物间存在着相互作用，合适的硅铁摩尔比有利于提高混凝效果，而且还可以降低投药成本；复合亚铁是通过氧化还原、吸附电中和及卷扫三种作用机理起混凝作用的。

In a salvaging operation under the water, measures must be taken to control oil pollution and prevent secondary pollution.

第三十八条在进行水下船舶的打捞工程时，应采取措施防止油污扩大和新的污染发生。

Problems including the scarcity of water resources, the deterioration of water and pollution of water environment have become severer.

水资源短缺、水质恶化和水环境污染等问题日益严重，人们也在不断探索解决这些问题的办法。

This pump is a new stainless stee multiusage vacuumpump with water circulation.it has big power,and multipe air exhaustor.and fixed,inside and ontside water circulation,can be with five tap for suction direct display at the same time,the pump has the advantages of unuse oil,non-pollution,big power,lower noise,easy movement, save water and electricity one machine with multi-usage.

该泵是大功率多头抽气的一种新型不锈钢循环水式多用真空泵，本机设计内外循环水，可以五头同时抽气，具有不用油、无污染、功率大、噪音低、方便灵活，节水省电等优点，一机多用。

By simulating the movement of groundwater in soil plough layer, the pollution characters of groundwater contaminated by salinity and heavy metals in the plough layer were researched under different water tables, different pollution levels and various texture soils.

通过模拟不同水位、污染度的地下水在不同质地土壤耕层中的迁移，进行了地下水中盐分和重金属对土壤耕层污染规律的研究。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。