众文网1.翻译一篇 环境工程论文一部分摘要 成英文
Buy useing the wire with magnetic physics producing magnetic adsorption device can realize themagnetic - separation of organic bentonite with printing and dyeing waste water.This magnetic adsorption device is easy to use and also suitable for large-scale promotion ,what's more?this device is conducive to further improve the efficiency of purification。
2.求环境工程英语文献及其翻译,非常感谢,复试用的
小分子有机酸对烟草吸收土壤中铅和镉的影响评估 MichaelW.H.Evangelou,MathiasEbel,Andreas SchaefferInstitut fu¨ r Biologie V, RWTH Aachen, Worringerweg 1, 52056 Aachen, Germany Received 1 February 2005; received in revised form 23 August 2005; accepted 24 August 2005 Available online 6 December 2005摘要： 植物修复就是运用植物提取土壤和地下水中的污染物，是净化重金属污染土壤很有前景的方法。
然而它的用途被许多因素限制，如植物生长所需时间、养分供应，此外，还有金属摄取量的限制。合成螯合剂已经表现出对重金属提取有促进作用，但同时也暴露出一些负面影响。
这个研究的目的在于探讨三种天然低分子量有机酸（NLMWOA）（柠檬酸、草酸、酒石酸）作为合成螯合剂的替代物的作用。实验包括：泥浆实验、毒性实验和列实验。
在植物提取实验中，将三种低分子量有机酸分别添加到铜和铅污染土壤中。与EDTA处理组（42 mgkg-1）相比，铜的摄取量有显著增加的仅在柠檬酸处理组表现明显。
低分子量有机酸没有显示出对铅的植物提取有促进作用。对这种结果的可能解释可能是低分子量有机酸的降解率。
对于像铅这种有着低流动性和生物利用度的重金属，这个比率可能过高。添加到土壤中的低分子量有机酸含量非常高（62.5 mmol. kg -1土壤）但作用很小。
在这方面，用量很少（0.125 mmol .kg -1）的EDTA效果更好。由此得出，低分子量有机酸不适用于加强土壤中重金属的植物提取。
关键词：植物修复 重金属 有机酸 螯合剂 烟草引言 植物修复被定义为运用绿色植物清除环境中的污染物，或使其无害化（Raskin et al., 1997）。植物修复不仅可用于清除有机污染物还可用于清除无机污染物。
比起其他治理技术，如填土、固定和淋失，它是经济合算的，而且不会对土壤基质造成不良影响。把对环境的干扰降到最小。
这些sites通常是美观的，因此更容易被公众接受。例如，德国人在莱比锡的植物修复基地已经很好地被附近居民接受。
尽管所有植物都有从土壤中提取金属物质的潜力，但一些植物已表现出对高水平重金属的提取、积累和耐受能力。按植物界中广泛分类方法，这种植物被称为超富集植物。
金属超富积是植物对金属土壤生理生态的适应结果。超积累植物的潜力在生物修复中的应用是有限的，即他们是生长缓慢，生物量小。
这些特征恰好和（Robinson et al. (2000)）的提议相反，即用于植物修复的植物应是生长迅速、扎根深、容易和积累目标金属的。根据（Ro¨ mkens et al. (2002)）的观点，这种植物还应有高生物量。
综合这些因素，来自南美洲和拉丁美洲地区叫做Nicotiana tabacum的这种烟草适于植物修复。 螯合剂已经显示出对植物修复重金属污染土壤有促进作用的能力，一种可平衡高富集植物的能力。
尽管像EDTA这种合成螯合剂表现出对重金属污染土壤的植物修复有积极影响，但它的运用也有一些缺点。EDTA在提取金属物质时没有选择性（Barona et al., 2001），并且biodegradability低（Wasay et al., 1998）。
它甚至在非常低浓度情况下还严重影响植物生长（Chen and Cutright.2001）。在自然发生螯合的系统中找到的合成螯合剂的替代品，我们把它叫做生物螯合剂。
像胡敏酸这种生物螯合剂已经显示对重金属污染土壤的植物修复有积极作用（Evangelou et al.2004）。另一种可能选择是被植物渗出到土壤中的低分子量有机酸（NLMWOA）。
我们知道，植物根渗出的有机化合物可能间接或直接影响原本的溶解度和有毒离子。间接影响，是通过影响微生物活动、根际土壤的物理性质和根的生长动态来实现的。
而直接影响是通过在根际土的酸化、螯合、沉淀和氧化还原反应实现的（Uren and Reisenauer 1998;Marschner et al.1995）。在这些化合物中，NLMWOA因它们的综合性能而显得特别重要，在重金属溶解性中扮演重要角色（Mench and Martin,1991;Krishnamurti et al,1997;Nigam et al,2000）。
并且矿物营养（Zhang et al,1989;Jones et al,1996）的加入，甚至显得比土壤PH更重要（Huang et al,1998）。 本次研究的目的是，在实验室条件下运用烟草，探讨低分子量有机酸有关增强铜、铅污染土壤的植物提取能力。
我们用低分子量有机酸替代EDTA或其他合成螯合剂等化合物作为植物修复重金属污染土壤的促进剂，并对其潜能进行评估。2. 材料和方法2.1 土壤描述 这是一种粉质，壤质砂土农业土壤，美国农业部（Soil Survey Manual,1995），取自于德国亚琛Melaten农田0到30cm的表层土。
把土样在室温下风干，研磨过2mm筛并做如下定性。用比重计测定土样中的沙、粘土和淤泥分数（Bouyoucous,1952）。
用沃克利黑法测定有机质含量（Nelson and Sommers,1996）。用氯化钙方法测定PH(Lewandowski et al,1997)。
土壤中初始总铅和总铜含量，用王水消煮，过滤后用火焰原子吸收光谱法测定土壤中铅、铜含量。原子吸收光谱法校准标准是通过在萃取液中分别适当增加铜和铅的量来实现的。
土壤的理化性质见表1。2.2 盆栽试验2.2.1 土样制备 盆栽实验于3月至4月间在温室中进行。
400克过筛的土样装入0..5L桶底带有六。
3.求一篇有关环境保护的英文文献,最好有翻译
We have to protect the environment
As the 21st century, we must make the protection of the environment to prevent damage to human again.
Because of the destruction of mankind, so that the Earth's biological, endangered plants facing extinction.
A tree, the establishment of eco-homes. Yes, this is true. Protection of the environment is everyone's responsibility.
Greentree said it, he can enjoy, he can。。.
Therefore, we must protect the ecological environment, let us change the survival of the planet even better!
我们要保护环境
作为21世纪的人，我们就要好好保护环境，不让人类再次破坏。
因为人类的破坏，使地球的生物、植物面临濒危灭绝。
一棵绿树，建立生态家园。对，事实如此。保护环境人人有责。
就说绿树吧，他可以乘凉，也可以遮风挡雨。。.
所以，我们要保护生态自然环境，让我们赖以生存的地球变的更加好！
4.环境方面英文文献和翻译
这是关于环境污染的！！passage with the words and phrases given:the problem of pollution, cause, artificial substances, release, waste products, industrial production, consumption of goods, bring it under control, agriculture, chemical substancea.Environmental PollutionI read a piece of news recently. It says that in Japan marly businessmen ave selling fresh air to customers.and now it is becoming more and more popular. Why? --Fresh air is getting less and less in Japan, and so is it in the U. S. A.In fact, environmental pollution is a very serious problem the whole world is facing.it is mainly caused by the waste products released from artificial substances, industrialproduction and increased consumption of goods. Bedsides, the use of chemical substancesin agriculture also causes environmental pollution. Look at the sky, you can see that dense smoke is being released from the high and big chimneys; those dirty and poisonous substances are flowing into the rivers that we use for drinking water and millions of tons of waste products are heaping around us.How to change this condition? More and more countries are trying to work out some effective means to bring it under control, but no great success has been made.The environmental protection is the most major problem which in the modern life the humanity faces. Must solve this problem must start from foundation. First, must massively propagandize, enhances people's consciousness with understanding, strengthens the environmental protection consciousness. Next, must carry on waste recovery use, reduces to forest-tree's felling. Also must strengthen to white pollution processing, little uses the plastic product. Finally, must make improvement to clean aspect. Causes the city's appearance to be neater. For Earth's tomorrow, we must start from the now diligently, will want the well local constable to protect the environment. To this us proposes as follows suggests: Implementation trash classification packed in bags. Like this not only can reduce the environmental sanitation worker's work load, but also can even better basically arrive makes use of waste, to reduce the pollution, saves the resources.。
5.环境方面英文文献和翻译
这是关于环境污染的！！passage with the words and phrases given:the problem of pollution, cause, artificial substances, release, waste products, industrial production, consumption of goods, bring it under control, agriculture, chemical substancea.Environmental PollutionI read a piece of news recently. It says that in Japan marly businessmen ave selling fresh air to customers.and now it is becoming more and more popular. Why? --Fresh air is getting less and less in Japan, and so is it in the U. S. A.In fact, environmental pollution is a very serious problem the whole world is facing.it is mainly caused by the waste products released from artificial substances, industrialproduction and increased consumption of goods. Bedsides, the use of chemical substancesin agriculture also causes environmental pollution. Look at the sky, you can see that dense smoke is being released from the high and big chimneys; those dirty and poisonous substances are flowing into the rivers that we use for drinking water and millions of tons of waste products are heaping around us.How to change this condition? More and more countries are trying to work out some effective means to bring it under control, but no great success has been made.The environmental protection is the most major problem which in the modern life the humanity faces. Must solve this problem must start from foundation. First, must massively propagandize, enhances people's consciousness with understanding, strengthens the environmental protection consciousness. Next, must carry on waste recovery use, reduces to forest-tree's felling. Also must strengthen to white pollution processing, little uses the plastic product. Finally, must make improvement to clean aspect. Causes the city's appearance to be neater. For Earth's tomorrow, we must start from the now diligently, will want the well local constable to protect the environment. To this us proposes as follows suggests: Implementation trash classification packed in bags. Like this not only can reduce the environmental sanitation worker's work load, but also can even better basically arrive makes use of waste, to reduce the pollution, saves the resources.。
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