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Preparation method of gel entrapped type efficient arsenic removing material

A high-efficiency, gel technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve problems such as the inability of arsenic adsorbents to be used, and achieve short treatment cycles, high arsenic removal rates, Wide range of effects

Inactive Publication Date: 2018-10-09
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0003] Purpose of the invention: To solve the problem that the nano-scale iron oxide arsenic adsorbent cannot be applied in the continuous high-concentration arsenic-containing wastewater treatment process, and to provide a preparation method for gel-embedded nano-scale iron oxide particles

Method used

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  • Preparation method of gel entrapped type efficient arsenic removing material

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preparation example Construction

[0022] like figure 1 As shown, the preparation method of the gel-embedded high-efficiency arsenic removal material disclosed in the present invention comprises the following steps:

[0023] Step 1, adding the nanoscale iron oxide particles into the alginate aqueous solution, stirring and mixing, the stirring rate is 500-1000rmp, the stirring time is 10-30min, preferably 15 minutes, the nanoscale iron oxide particles and the alginate aqueous solution The dosage ratio is 10-200g: 1L; the alginate is more than one of sodium alginate and potassium alginate, and the concentration of the alginate aqueous solution is 2.5-20g / L;

[0024] Step 2, use a syringe to absorb the mixed solution of nanoscale iron oxide and alginate, and the single absorption volume is 2-60mL;

[0025] Step 3, use a syringe pump to inject the mixed solution of nano-scale iron oxide and alginate in the syringe into the coagulation solution drop by drop through the needle, and coagulate into microspheres, and t...

Embodiment 1

[0030] Add 20g of nanoscale iron oxide particles into 100mL, 10g / L sodium alginate aqueous solution and stir for 15min, then draw the mixed solution with a syringe, the single absorption volume is 60mL, and use a syringe pump to pass the mixed solution through at a rate of 3mL / min. Inject 50mmol / L of CaCl drop by drop with a needle with an inner diameter of 0.21mm 2 solution, coagulate into microspheres, and then put the microspheres into 1L, 500mmol / L CaCl 2 The solution was solidified for 1 hour, and finally the cured microspheres were washed three times with 2 L of deionized water, and the particle size of the obtained microspheres was 0.56 mm.

Embodiment 2

[0032] Add 20g of nanoscale iron oxide particles into 100mL, 10g / L sodium alginate aqueous solution and stir for 15min, then draw the mixed solution with a syringe, the single absorption volume is 60mL, and use a syringe pump to pass the mixed solution through at a rate of 2mL / min. Inject 50mmol / L of CaCl drop by drop with a needle with an inner diameter of 0.06mm 2 solution, coagulate into microspheres, and then put the microspheres into 1L, 500mmol / L CaCl 2 The solution was solidified for 1 hour, and finally the cured microspheres were washed 3 times with 2 L of deionized water, and the obtained microspheres had a particle size of 0.11 mm.

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Abstract

The invention discloses a preparation method of a gel entrapped type efficient arsenic removing material. The preparation method includes: adding nanoscale iron oxide particles into an alginate aqueous solution, evenly stirring and mixing, using a syringe to suck the mixed solution, using an injection pump to dropwise inject the mixed solution in the syringe into solidification liquid so as to form microspheres, placing the microspheres into curing liquid for curing, and using deionized water to wash the cured microspheres to obtain the gel entrapped type efficient arsenic removing material. The prepared gel entrapped type efficient arsenic removing material is controllable in particle size, wide in application range, high in arsenic removing efficiency during the treatment of high-concentration arsenic-containing wastewater, large in total arsenic removing quantity, fast in treatment, capable of lowering the total arsenic content of the high-concentration arsenic-containing wastewaterto allow the total arsenic content to be below national discharge standards and the like.

Description

technical field [0001] The invention relates to a preparation method of an arsenic-removing material, in particular to a preparation method of a gel-embedded high-efficiency arsenic-removing material. Background technique [0002] Arsenic is a highly toxic pollutant, which has the "three causes" of carcinogenic, teratogenic, and mutagenic effects on humans or animals, and is extremely harmful to the human body. Studies have shown that drinking groundwater with arsenic concentration of 50 μg / L for a long time will lead to a mortality rate as high as 1%, the World Health Organization (WHO) just ranked arsenic pollution in the first place of all environmental pollutants in the 1968 environmental report. In recent years, with the rapid development of modern industry and agriculture, and the occurrence of various natural disasters, arsenic pollution in water has become a very prominent global environmental problem that needs to be solved urgently. Existing studies have shown tha...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/24B01J20/28004B01J20/28021C02F1/286C02F2101/103
Inventor 林森许浩陈鑫刘莉莉张卫林匡飞
Owner EAST CHINA UNIV OF SCI & TECH
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