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六价铬毕业论文

2023-03-08 16:33 来源:学术参考网 作者:未知

六价铬毕业论文

为了探究经固化的植物单宁对金属离子的吸附状况,以甲醛原位固化茶粉、六价铬离子溶液为反应原料,通过动态吸附的吸附方法,考察不同的吸附柱高度、吸附质初始浓度、吸附温度及吸附质流速对刮吸附剂动态吸附效果的影响。结果表明,茶粉经固化反应后,吸附穿透时间增大,随着吸附床层高度提高,吸附穿透时间增大;随着吸附质浓度的增加,吸附穿透时间下降;随着金属离子溶液流速的增加,穿透时间逐渐降低;而随吸附温度提高,吸附穿透时间增大。

To explore cured plant tannin adsorption condition metal ions to formaldehyde in situ solidification tea powder, hexavalent chromium ion solution as raw materials, dynamic adsorption by adsorption methods, examining different adsorption column height, the initial concentration of adsorbate adsorption temperature and mass flow rate on dynamic adsorption adsorption scraping of the adsorbent. The results showed that tea powder after the curing reaction, adsorption breakthrough time increases, along with the bed height increased adsorption breakthrough time increases; adsorption increases with the mass concentration, adsorption breakthrough time decreased; with the metal ion increasing the flow rate of the solution, the penetration time decreases; and with the adsorption temperature increases through the adsorption time increases.

RoHS方面的本科毕业论文

既然你是应化的,论文真正研究的东西就应该具体点,不能太泛,不能写成RoHS综述。所以论文的题目可以这样写“RoHS检测中六家铬的测定”,又或者两种限制物质的测定,甚至三种。当然其他方面还有很多可以写,如“不同原材料部件中RoHS限制物质的含量研究”等等,具体跟你的工作尽量靠拢。因为你是在实习单位做论文,所以论文要尽量跟公司实际靠拢,要让人家一看就觉得确实是在企业里干了点实事。但论文写的东西不一定要是你实际干的工作,可以写某一小方面,也可以稍作改动。如果你们实验室只有EDX的话估计也没什么好写的,如果有GC—MS的话,可以写的东西就多了,只要在论文里面提到用GC—MS进行检测,估计也增加了不少印象分,毕竟用了先进的仪器嘛。

那要看你做哪方面了,如果你用紫外做六价铬的话,估计能写的东西不多,而且紫外就是紫外,就算是最先进的型号也只是很普通的仪器。写GC—MS方面的吧,随便弄十几个谱图进去就是一篇高质量的论文了。

急求毕业论文摘要英文翻译,求那位大虾帮帮忙

Chromium is widely distributed in nature, organisms mainly trivalent form of chromium. Trace elements is essential for people and livestock, but there will be the accumulation of excessive toxicity. Hexavalent chromium is the most toxic form, the toxicity of trivalent chromium than 100 times. In this paper, studies of chromium in soil and plants to study the migration of chromium on the impact of plants, a result that chromium can be stunted plant growth. Through the study of chromium in the body and the body cells and tissues of different physiological responses occur to explain the chrome on the principle of the human body, as well as the consequences of hazards. At the same time, the end of this article also describes several of the determination of chromium.

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