Electrochemically enhancing multifunctional material adsorbing and fluorine removing system, and method thereof

A multi-functional, electrochemical technology, applied in chemical instruments and methods, electrochemical water/sewage treatment, adsorbed water/sewage treatment, etc., can solve the problems of overall water quality impact and high operating costs, and achieve the effect of ensuring long-term stability

Active Publication Date: 2012-02-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology can remove most of the ions in water, including fluorine ions, but it has no selective adsorption function for fluorine, so when the purpose is to remove fluorine, the operating cost is high and has a great impact on the overall water quality

Method used

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  • Electrochemically enhancing multifunctional material adsorbing and fluorine removing system, and method thereof
  • Electrochemically enhancing multifunctional material adsorbing and fluorine removing system, and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for electrochemically strengthening multifunctional materials to adsorb and remove fluorine, comprising the following steps:

[0028] 1) During the adsorption process, high fluorine water with a fluoride content of 5mg / L as a drinking water source enters the electric field enhanced multifunctional material adsorption and defluorination system. The size of the adsorbent material is 24×6cm, the residence time is 1h, and the flow rate is 0.43m / h, the fluoride ion concentration of the effluent is ≤1.0mg / L, and the hardness ions in the water are removed at the same time. The multifunctional adsorption material adopts two kinds of adsorbent materials, lanthanum and aluminum, loaded on the activated carbon fiber carrier, and absorbs the power distribution floor of the fluoride removal system. A 1mm thick titanium electrode plate is used, and the distance between the plates is 4mm. A DC voltage of 1.6V is applied between the two plates. Two sets of electrochemical reac...

Embodiment 2

[0032] A method for electrochemically strengthening multifunctional materials to adsorb and remove fluorine, comprising the following steps:

[0033]1) During the adsorption process, high fluorine water with a fluoride content of 5mg / L as a drinking water source enters the electric field enhanced multifunctional material adsorption and defluorination system. The size of the adsorbent material is 24×6cm, the residence time is 1h, and the flow rate is 0.63m / h, the fluorine ion concentration of the effluent is ≤1.0mg / L, and the hardness ions in the water are removed at the same time. The multifunctional adsorption material adopts various adsorbent materials such as iron, aluminum, lanthanum and cerium adsorbents on the activated carbon carrier to absorb and remove fluorine The power distribution base plate of the system adopts 2mm thick graphite electrode plates, the distance between the plates is 4mm, a DC voltage of 1.6V is applied between the two plates, and three sets of elec...

Embodiment 3

[0037] A method for electrochemically strengthening multifunctional materials to adsorb and remove fluorine, comprising the following steps:

[0038] 1) During the adsorption process, high fluorine water with a fluoride content of 5mg / L as a drinking water source enters the electric field enhanced multifunctional material adsorption and defluorination system. The size of the adsorbent material is 24×6cm, the residence time is 0.5h, and the flow rate is 1.88m / h, the concentration of fluoride ions in the effluent is ≤1.0mg / L, and the hardness ions in the water are removed at the same time. Titanium electrode plates, the distance between the plates is 4mm, a DC voltage of 2V is applied between the two plates, and three sets of electrochemical reaction chambers are connected in series. After 5 hours of treatment, the multifunctional adsorbent material penetrates and regenerates;

[0039] 2) In the regeneration process, a 1.6V voltage is applied reversely at both ends of the elect...

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Abstract

The invention relates to an electrochemically enhancing multifunctional material adsorbing and fluorine removing system, and a method thereof. The system is formed by connecting plural groups of reaction chambers. Each group of the reaction chamber comprises a multifunctional adsorption material. One surface of the multifunctional adsorption material is connected with a first end plate by a firstpower distribution bottom plate, the other surface of the multifunctional adsorption material is connected with a second end plate sequentially by a second separation plate, a second power distribution bottom plate and a third separation plate. The power distribution bottom plates are respectively connected with power supply. Water flowing channels are arranged on upper sides or lower sides of the power distribution bottom plates. The distance between the first power distribution bottom plate and the second power distribution bottom plate is 1-10 mm. The method of the present invention comprises: carrying out an adsorption process; then carrying out a regeneration process; adopting the cycle of the adsorption process and the regeneration process to transform the electrode polarity and ensure the effluent quality. With the present invention, the fluoride removing capacity, the electric conductivity and the regenerative efficiency of the adsorbent are improved, the energy consumption isreduced, the operation process is simplified, and the water production cost is reduced.

Description

technical field [0001] The invention relates to the field of electrochemical defluorination, in particular to an electrochemically enhanced multifunctional material adsorption defluorination system and method. Background technique [0002] There are many high-fluorine water distribution areas in my country's groundwater resources, and the reason is closely related to the characteristics of fluorine and hydrogeological conditions. The unsafe population drinking high-fluorine water is widely distributed, and most of them are distributed in counties, towns and rural areas with relatively backward water supply levels, water supply volume and water quality. Water with a fluoride content exceeding 1.0mg / L is high-fluoride water. Long-term drinking of high-fluoride water will cause endemic fluorosis, including dental fluorosis and skeletal fluorosis, which directly threaten human health. Among the many defluoridation methods, the adsorption method is considered to be a method with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46C02F1/28C02F1/58C02F101/14
Inventor 张旭杨硕李广贺李泽唐胡欣琪
Owner TSINGHUA UNIV
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