Seplite® LSC-760 Special Resin for Fluoride Removal Makes Wastewater Precision Fluoride Removal Easier
Seplite®LSC-760 Special Resin for Fluoride Removal Makes Wastewater Precision Fluoride Removal
Easier
Fluorine is one of the trace elements needed by human body, which is mainly accumulated in human bones and teeth. Constant fluorine is helpful to prevent dental caries. However, if the fluorine content in drinking water is more than 1ppm, the teeth will gradually have spots and become brittle; if it is more than 4ppm, it will cause fluorosis, and lead to bone marrow deformity and harm human health. Therefore, the country has clear requirements for fluorine content in drinking water (less than 1ppm). For the discharge requirements of fluorine content in industrial wastewater, some regions have also raised the national discharge standard of less than 10ppm to less than 1ppm, which brings challenges to the precision removal of fluorinein industrial wastewater.
At present, there are two main methods to remove fluorine from wastewater in the market: chemical method and adsorption method.
| Processing method | Advantages | Disadvantages | |
|---|---|---|---|
| Chemical method | Lime | Simple, convenient and low cost. |
The effluent accuracy is generally 15-20 mg/L, which is usually used as the pretreatment for fluorine-containing wastewater. |
| Aluminum salt, iron salt |
Large capacity, able to meet the wastewater discharge standard (10
ppm), simple and convenient operation |
When the treatment accuracy is less than 10ppm, the drug dose and waste residue are large and the treatment cost is high. |
|
| Adsorption method |
Conventional adsorbents (zeolite, carbon-based apatite, activated alumina, etc.) |
It is suitable for the defluorination treatment of low concentration fluorinated ionic water, the treatment accuracy is higher than the precipitation method, and the adsorbent cost is lower |
When the treatment accuracy is less than 1ppm, it is not stable enough, with large fluctuation, low adsorption capacity, and obvious attenuation after multiple regeneration. |
|
Special resin for fluorine removal |
Suitable for the defluorination treatment of low concentration fluorinated ionic water, the treatment accuracy can be stable below 1ppm, and it is easy to regenerate and has long resin life. The resin system can be designed to be automated and easy to operate, with low operating cost. |
One-time investment cost is relatively high. |
|
For the low content and precision required to remove
However, in the adsorption process, the conventional adsorbents (such as zeolite, activated alumina, etc.) in the precision treatment of fluorine, there are some problems such as large fluctuation, low treatment capacity and obvious attenuation. However, conventional anion exchange resin has a low selectivity to fluorine due to the limitation of ion selectivity order. In competitive exchange adsorption, fluorine ion is at a disadvantage, which affects the removal effect of the resin on fluorine ion.
(selective order of anions: CIO4-> I-> CrO42-> SO42-> BR-> CN-> NO3-> Cl-> F-)
LSC-760 special resin for defluorination developed by Sunresin is a new nano metal loaded polymer resin. The resin has a single selectivity for fluorine ions in the water phase. Compared with the conventional anion exchange resin, the resin has the characteristics of high selectivity, large processing capacity, high processing accuracy, less resin consumption under the same working conditions, and long service life (generally more than years). Through pilot test and industrial verification of many industrial enterprises, the fluorine content in the effluent can be maintained below 1ppm stably, and the resin performance is stable and reliable. Seplite ® LSC-760 resin is considered as the reliable guarantee for the accurate fluorine removal of wastewater by the majority of users.
Seplite®LSC-760 Special Resin for Fluoride Removal:
| Operation temperature（℃) | ≤60 |
|---|---|
| pH | 69 |
| Total hardness（ppm，CaCo3) | ＜300 |
Application process flow diagram of
Seplite ® LSC-760 fluoride removal special resin:
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