Cation Exchange Resin: Use And Maintenance

When utilizing resin, it's important to avoid polluting it with suspended matter, organic matter, and oil. Additionally, we should prevent the severe oxidation of certain wastewater on resin. In order to achieve this, it's crucial to remove heavy metal ions before introducing any acid oxidation wastewater to the anion resin, thus preventing the negative impact of heavy metals on the resin. By being mindful of these steps, we can ensure that the resin's effectiveness is maximized and that our processes are as sustainable and eco-friendly as possible.
 

Following the operation of each equipment, it is necessary to discharge the wastewater in the AC column back to the waste water tank. The resin should not be left to soak in the original solution for an extended period once it is full. Instead, it should be promptly washed to ensure its proper function. Furthermore, soaking the resin in tap or purified water can further enhance its performance. Let's ensure our equipment is well-maintained for optimal results.

As the cycles go on, both cation and anion resin may experience a decrease in AC capacity. However, this is not necessarily reason for concern. One potential cause of this decrease is incomplete selection, which leads to a gradual accumulation of ions that inhibit normal exchange. Nevertheless, with proper attention and regular maintenance, resin can continue to provide reliable performance and deliver high-quality results. Ultimately, by staying attentive and taking the necessary steps to address any issues that arise, users can ensure the ongoing effectiveness and long-term sustainability of their resin-based systems.On the other hand, H2CrO4 and H2Cr2O7 in chromium containing wastewater have oxidation effect on the resin, which makes cr3+ more and more in the resin, which affects the normal operation of the resin. Therefore, when the resin capacity has a significant decline, the resin activation should be carried out.

Tailoring the activation technique of anion resin to the type of wastewater is crucial for achieving optimal results. Successful treatment of chromium-laden wastewater through anion resin activation has been reported through domestic experiments. This highlights the potential of utilizing this method for various types of wastewater treatment.The principle operation is as follows: soak the anion resin in 2-2.5mol / 1h2so4 solution after normal, then participate in NaHSO3 under slow mixing, and reduce cr6+ on the resin to cr3+. The resin is soaked in the above solution for one day and night, then washed with clear water. Repeat the above process for 1-2 words, and then remove cr6+ and cr3+ in the resin, and then use NaOH to transform for use.

The main purpose of cation activation is to remove heavy metal ions accumulated on the resin, especially those high priced cations with strong binding force with resin, such as fe3+, cr3+. It can be activated in vivo. The amount of activated liquid is twice the volume of resin. Hydrochloric acid equipment with a concentration of 3.0mol/1 is used. The resin layer is soaked with a flow rate of 1-2 times the volume of resin, and the concentration is 2.0-2.5mol/1 sulfuric acid solution. It takes one day and a day (at least 8 hours). The fe3+, cr3+ and other heavy metal ions in the resin are basically removed. After rinsing, the resin can be used.