Question

跪求英文翻译，不要翻译软件翻译出来的半成品，要完全符合英语语法的英文．谢谢了．在线等

含锌废水的排放对人体健康和工农业活动具有严重危害，具有持久性、毒性大、污染严重等危害，一旦进入环境后不能被生物降解，大多数参与食物链循环，并最终在生物体内积累，破坏生物体正常生理代谢活动，危害人体健康。随着人类对金属锌的开采、冶炼、加工等生产活动的日益增加，产生的含锌废水无论是从数量上还是种类上都大大增加，造成了严重的环境污染和资源浪费。因此含锌废水的治理仍然是世界环保领域的重大研究课题。
目前，国内外根据其处理手段的不同，可分为物化法和生物法，根据锌在溶液中存在的形态不同，常用的处理方法分两类：第一类是使废水中呈溶解状态的锌（II）离子转变为不溶的重金属化合物，经过沉淀或浮上法从废水中除去，具体方法有化学沉淀法、离子交换法、吸附法等；第二类是使废水中的重金属在不改变其化学形态的条件下进行浓缩和分离，具体方法有反渗透法、电渗析法、蒸发浓缩法。通常多采用第一种方法，第二种方法只有在特殊情况下才采用。
本文就是运用物化法当中的吸附法．将壳聚糖与膨润土结合, 研制出一种复合吸附剂, 用于溶液中Zn2+的脱除, 取得很好的效果, 脱除率达到98% 以上。通过红外光谱实验研究了改性膨润土的结构和改性机理。结果表明, 膨润土的片状层结构未发生变化, 壳聚糖仅吸附在膨润土的内外表面。该吸附剂具有投药量少、稳定性高、操作简单、无再次污染等优点。并从反应时间，体系pH，废水的初始浓度，吸附剂投加量，壳聚糖浓度等条件的变化下入手，研究实验条件变化时吸附效果的变化，并在相同的条件下，用不同的吸附剂处理相同浓度的废水，研究比较处理效果有什么不同．

Answer 1

Zinc wastewater discharge on human health and industrial and agricultural activities have seriously endangered, with persistence, toxicity, serious pollution and other hazards, after they enter the environment can not be biodegradable, in the majority of the food chain cycle, and ultimately bioaccumulate, destruction organisms normal physiological metabolic activity, and endanger human health. As human right of zinc metal mining, smelting, processing and other production activities increasing, The zinc-bearing wastewater from both the quantity or types have increased significantly, causing serious environmental pollution and waste of resources. Therefore zinc wastewater treatment remains one of the world's major environmental protection projects. Currently, in accordance with its domestic and international means of handling different, it can be divided into physical and chemical and biological methods, According to zinc in the solution of different forms, the usual approach of two types : The first is to make wastewater was dissolved zinc (II) ions into insoluble heavy metal compounds, After precipitation up to France or removed from the wastewater and specific methods of chemical precipitation, ion exchange, adsorption, etc.; The second category is to enable the removal of the heavy metals in no change in its chemical form under conditions of enrichment and separation, specific methods of reverse osmosis, electrodialysis, evaporation method. Usually more than the first method, the second method only in exceptional circumstances under which they adopted. This paper is the use of physical and chemical laws which the assay. Chitosan and bentonite will combine, the development of a composite adsorbent, the solution for the removal of Zn2 +, achieved very good results, the removal rate of 98% and above. By infrared spectroscopy studies of modified bentonite modified the structure and mechanism. The results showed that the bentonite flake layer structure have not changed, only adsorption of chitosan in the external and internal surfaces of bentonite. The adsorbent is less dosage, high stability, simple operation, again without pollution. And from the reaction time, pH, the initial concentration of wastewater, the amount of the adsorbent, chitosan concentration under conditions of the changes start, research laboratory conditions change adsorption, and the changes in the same conditions, different adsorbent dealing with the same concentration of the wastewater, comparing the effect is much different.

Answer 2

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