Can 001×7 resin adsorb iron ions and aluminum ions under acidic conditions?
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Dear experts: Can 001×7 resin adsorb iron ions and aluminum ions under acidic conditions? Help is needed urgently!!!
I’m not entirely sure; if the acidity is too high, there might be problems, as reverse exchange could occur (as opposed to regeneration). It depends on the specific acidity level Iron ions may cause the resin to be \"poisoned,\" of course, depending on the actual amount present and the acid concentration.
Reply to 2# Yang Qing: The pH value of the saltwater is 2.62, and its iron content is 121.1 ppb. An iron content below 3000 ppb does not cause contamination to the resin. I’m not sure whether a saltwater pH of 2.62 will cause back-exchange of the resin
Do you mean saturated concentrated brine by salt water? Generally, saltwater is used for resin regeneration, but it is diluted. The pH has not been specifically measured; to what extent does resin contamination need to reach before it causes poisoning? What is the acceptable range for iron content?
Reply to 4# fxswl: I’ve checked relevant information and found that new resins are soaked in saturated salt water during pretreatment. I want to use resin to absorb the metal cations in saline water, but the result is that the amount of metal ions actually increases instead of decreasing. I’ve already pre-treated the resin, and it’s really puzzling! !
The resin can be either sodium-exchanged or hydrogen-exchanged. The new resin is first soaked in saline to convert it to the sodium form, then washed with pure water and subsequently regenerated with hydrochloric acid to convert it to the hydrogen form, after which it is washed with pure water until no chlorine remains. It is said that salt is used first to activate the resin... and then the ion exchange you mentioned can be carried out to remove ions such as Al and Fe. Your acidity level isn’t very high. Due to a lack of experience and practical theoretical basis, I really can’t tell you the exact exchange efficiency you can achieve; it will have to be determined after ion exchange is carried out.
If only saline is used, then sodium ion exchange occurs; an increase in metal ions is possible, and it are the sodium ions that are released……
I need to find a material to remove iron ions; add me on QQ: 1047962245 for discussion.