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Hybrid spheres capable of removing Br ions from drinking water as well as preparation method and application of hybrid spheres

A bromide ion and drinking water technology, applied in chemical instruments and methods, ion exchange water/sewage treatment, water pollutants, etc., can solve the problems of small water throughput, large consumption of iron powder, high cost, etc., and achieve continuous Optimized production, improved circulation efficiency, and long service life

Inactive Publication Date: 2018-01-16
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only the active ingredients of disinfectant oxides are consumed, which reduces the effectiveness, but also these materials cannot be recycled or the cost of regeneration is high
Pure iron can reduce bromate to bromide ions, but the consumption of iron powder is large, and the sludge generated in the equipment makes the water flow rate small, and the increase of iron ions in the water increases the rust pollution
Other bromate removal methods also have deficiencies that are not easy to overcome. For example, the ammonia addition method generates unsafe substances such as ammonium bromide, the biochemical method has the risk of microbial secondary pollution, and the ion resin exchange method has the influence of competing ions and concentrated water pollution. Issues such as high cost and high cost are waiting for in-depth study by scientific and technological workers

Method used

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  • Hybrid spheres capable of removing Br ions from drinking water as well as preparation method and application of hybrid spheres
  • Hybrid spheres capable of removing Br ions from drinking water as well as preparation method and application of hybrid spheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of silver algae gel: preparation of silver nitrate-sodium alginate sol with a mass ratio of silver nitrate:sodium alginate=1:10 and a mass concentration of 5%; 24h;

[0035] (2) Molding: molding the aged silver nitrate-sodium alginate sol into 3mm pellets through a mold, and reacting in 12% calcium chloride solution at 45°C for 5 hours;

[0036] (3) Purification and removal of impurities: the hybrid pellets obtained in step (2) are washed with water until they are free of calcium ions and chloride ions, and then they are centrifuged, dehydrated, and packaged to obtain a hybrid pellet composed of calcium alginate / AgCl material. small ball;

[0037] The prepared calcium alginate / AgCl hybrid pellets were characterized by SEM, and the results are shown in figure 1 As shown, it can be seen that calcium alginate forms a continuous phase, and white silver chloride particles are evenly distributed in the continuous phase of calcium alginate to be "embedded" an...

Embodiment 2

[0042] (1) Preparation of silver algae gel: prepare a silver nitrate-sodium alginate sol with a mass ratio of silver nitrate:sodium alginate=1:5 and a mass concentration of 1%; keep the silver nitrate-sodium alginate sol dark 10h;

[0043] (2) Molding: mold the aged silver nitrate-sodium alginate sol into 5mm pellets, and react in 30% calcium chloride solution at 60°C for 0.5h;

[0044] (3) Purification and removal of impurities: the hybrid pellets obtained in step (2) are washed with water until they are free of calcium ions and chloride ions, and then they are centrifuged, dehydrated, and packaged to obtain a hybrid pellet composed of calcium alginate / AgCl material. small ball;

[0045] (4) Br-Cl ion exchange column and ion exchange: put the hybrid pellets into the cylindrical container to equip the hybrid pellet column equipment, then pass the drinking water through the hybrid pellet column equipment, and pass the hybrid pellet The column devices are connected in parallel...

Embodiment 3

[0049] (1) Preparation of silver algae gel: prepare a silver nitrate-sodium alginate sol with a mass ratio of silver nitrate:sodium alginate=1:20 and a mass concentration of 10%; store the silver nitrate-sodium alginate sol in the dark 17h;

[0050] (2) Molding: molding the aged silver nitrate-sodium alginate sol into 2mm pellets through a mold, and reacting in 1% calcium chloride solution at 15°C for 10 hours;

[0051] (3) Purification and removal of impurities: the hybrid pellets obtained in step (2) are washed with water until they are free of calcium ions and chloride ions, and then they are centrifuged, dehydrated, and packaged to obtain a hybrid pellet composed of calcium alginate / AgCl material. small ball;

[0052] (4) Br-Cl ion exchange column and ion exchange: put the hybrid pellets into the cylindrical container to equip the hybrid pellet column equipment, then pass the drinking water through the hybrid pellet column equipment, and pass the hybrid pellet The column...

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Abstract

The invention provides hybrid spheres capable of removing Br ions from drinking water as well as a preparation method and an application of the hybrid spheres. The hybrid spheres contain a spherical calcium alginate / AgCl hybrid material. The preparation method of the hybrid spheres comprises steps of preparation of AgNO3 / calcium alginate gel, molding, reaction in a CaCl2 solution for preparation of the hybrid spheres as well as purification for impurity removal, and finally, the hybrid spheres capable of removing the Br ions from the drinking water is obtained. An application process comprisespreparation of a hybrid sphere based ion exchange column, ion exchange, detection of bromate content and the like. The hybrid spheres can be recycled by means of a CaCl2 and a NaCl mixed solution. The hybrid spheres as well as the preparation method and the application thereof have the advantages that the problem of potential safety hazard of bromate in the drinking water is solved, a process forremoving bromate from the drinking water is brought forward to a process for removing the Br ions, the previous technology for forming bromate and then reducing bromate into Br ions is replaced witha technology for preventing forming of bromate, and consumption of an oxidation disinfectant and secondary pollution caused by removal of bromate addition reagents and reaction byproducts are avoided.

Description

technical field [0001] The invention relates to a hybrid bead for removing bromide ions in drinking water, in particular to a hybrid bead for removing bromide ions in drinking water and a preparation method and application thereof. Background technique [0002] As far as drinking water is concerned, it has become an important indicator of quality of life that people not only drink tap water, but also drink clean and healthy water. [0003] Bromide ion, like chloride ion, is the most common monovalent anion in natural water. It is harmless to the human body, but bromate is harmful to the human body, and the risk of disease is related to the concentration. The higher the concentration, the greater the risk. Big. Toxicological studies have shown that very low concentrations of bromate in water have potential carcinogenic effects on humans. Long-term consumption of bromate-containing drinking water in test rats will greatly increase their incidence of kidney cancer, thyroid an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/42C02F1/50C02F1/28C02F101/12
Inventor 李群李子超薛云赵昔慧李晓雯王越朱倩倩谭艳丽邓宇甲
Owner QINGDAO UNIV
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