How are various impurity ions removed during saltwater purification, and what are the relevant standards? Everyone is welcome to discuss this

Thread Content

This post was last edited by *nht1 on 2016-10-11 21:41. Discussions are welcome on saltwater purification, as well as how to remove various impurity ions from the sediment and what the relevant standards are. Examples include metal cations such as Ca, Mg, K, Li, Cu, Fe, Ni, Zn, Pb, Sn, etc., as well as anions such as sulfate, carbonate, ammonium, etc. Some of these may not be present; my aim is to provide a starting point to initiate discussion. I invite everyone to explore how to analyze these substances, how to evaluate them, how to choose appropriate processing methods, and how to apply relevant principles in different contexts. Different industries may have varying approaches and requirements, so please discuss based on the specifics of your own facilities. What I am aware of includes methods such as stepwise precipitation, ion exchange methods (extraction, ion exchange column method), adsorption, ammonia neutralization, calcium neutralization, barium salt precipitation, magnesium neutralization, hydrolysis, recrystallization, washing, calcination, complexation, methods for increasing or decreasing solubility, membrane methods, and so on. What I have mentioned may not be entirely professional or comprehensive; I hope everyone will offer their criticism and corrections, as well as share their opinions, in order to conduct a more in-depth discussion on this topic. Examples can be cited, along with data, charts, and graphs, etc. Although ions are present in small quantities, their impact is significant. Especially in materials with high quality requirements, there are also certain usage constraints; the amount of certain impurity ions plays a decisive role in determining whether the material can be used properly and whether the manufacturing process will proceed smoothly. Little by little, knowledge is accumulated – genius comes from diligence. I look forward to learning together with you, discussing together, and improving together. With your participation, I believe I too will gain valuable insights and enlightenment. Haichuan Process Management & Technology Team