Dave's ESL Cafe's Student Discussion Forums

[garyliang]

hello,all friends from the wholeworld.i am garyliang i hope to be your friends.nowadays i wrote an abstract of my thesis,i think there are many mistakes in it.but my english is not good ,i am a chinese student , i hope you can edit it for me .
please help me. thank you very much !!



Study on cyanide recovery by ion exchange from gold ore waste effluents
Abstract
As the world pollution source of toxic waste, cyanide effluents would not be drained if not disposed, which not only polluted water resources, but also lead to great expenses of cyanide and valuable metals. To the appearance, this study found a economical, effective ion exchange method to recover cyanide and valuable metals and design parameters for scale production by dealing with the effluents produced by ZhongYuan Gold Smelting Plant.
The results of this study are follows:
1. On the basis of comparation of ion exchange capacities and adsorptive ratio, 201�7 strong base anion exchange resin produced by Xi�an Power Resin Plant was selected. The elution of Fe was studied and a feasiable method was put forward.
2. The process of ion exchange was controlled by Body liquid membrane diffusion by study on kinetics and thermodynamics of adsorption and elution, and the ion exchange equilibrium is according to Freundlish model. The thermodynamic parameters was calculated: =1.473 kJ�mol-1， =-10.966kJ�mol-1， =42.45 J∙mol-1∙K-1.
3. The results of dynamic experiments showed that the ion exchange band was 15.36cm, and designed the scale parameters of ion exchange column.
4. Seeking after a feasible recovering process and defining the best test conditions.The best adsorption condition: the ratio of solution and resins are 20:1,1.5h；H2SO4 elution condition: 2.5%H2SO4,1h; ammonia water elution condition: 8%NH3�H2O, 2h.All experiments runs at room temprature.
This process not only effectively recovered the toxic cyanide and the valuable metallic elements in the wastewater, also improved the ratio of resource utiliztion and environment. If this process wide used, it would had achieved great economic effeciency, social and environment benefit, a large-step in cleanness production and circulate economy.

[garyliang]

why no one help me ?friends?

[KHF]

You should really take advantage of the help center in your institution instead of asking here, as scientific essays are often specialized thereby containing verses not seen in regular English. I have highlighted some problematic areas here. Things I don't like are marked in red, illogical instances are marked in blue (which means I could be wrong since chemistry is not my forte).

[garyliang]

thank you very much ,KHF , i think you give me a great help ,i saw a lot of some apparent mistakes on grammar and so on .
i think i wil try my best to improve my english and the level of writing .
i hope you can tell me some forum about chemistry or metallurgy

thanks again!