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Preparation and application of composite microsphere used for coagulation adsorption and adsorbent thereof

A technology of composite microspheres and adsorbents, which is applied in the field of water treatment, can solve problems such as raising river beds, and achieve the effects of improving efficiency, high degree of dispersion, and high adsorption activity

Inactive Publication Date: 2018-12-14
WUHU XINDA LANDSCAPING GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also certain problems. The large particles produced by coagulation and adsorption will be deposited with the bottom mud. After a long period of accumulation, the river bed will be raised. Therefore, dredging is required to meet the functions of flood control and navigation.

Method used

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  • Preparation and application of composite microsphere used for coagulation adsorption and adsorbent thereof
  • Preparation and application of composite microsphere used for coagulation adsorption and adsorbent thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] A method for preparing composite microspheres for coagulation and adsorption, comprising the steps of: adding 4kg of a sulfuric acid solution with a concentration of 14.2wt% to 40kg of a sodium aluminate solution with a concentration of 1.9mol / L, stirring at room temperature until the pH of the solution is 8 -8.8, filter, wash the precipitate, add 0.2kg polyvinyl alcohol, 60kg concentration of 24wt% ethanol solution and stir for 8min, the stirring temperature is 145°C, add 0.2kg ammonium bromide, 0.4kg cetyl trimethyl chloride The ammonium is mixed evenly, and the composite microspheres for coagulation and adsorption are spray-dried at 140°C.

[0021] A method for preparing a coagulation adsorbent, comprising the steps of:

[0022] S1. Mix 12kg ferrous sulfate heptahydrate and 8kg polyvinyl chloride multifaceted hollow spheres with an average inner diameter of 3mm, heat until ferrous sulfate heptahydrate is hydrolyzed, add 40kg deionized water and mix evenly, using a co...

Embodiment 2

[0025] A method for preparing composite microspheres for coagulation and adsorption, comprising the steps of: adding 12 kg of a sulfuric acid solution with a concentration of 10.5 wt % to 60 kg of a sodium aluminate solution with a concentration of 1.4 mol / L, and stirring at room temperature until the pH value of the solution is 8 -8.8, filter, wash the precipitate, add 1kg polyvinyl alcohol, 40kg concentration of 35wt% ethanol solution and stir for 2min, the stirring temperature is 164°C, add 0.1kg ammonium bromide, 1kg cetyltrimethylammonium chloride and mix Uniform, spray-dried composite microspheres for coagulation and adsorption at 120°C.

[0026] A method for preparing a coagulation adsorbent, comprising the steps of:

[0027] S1. Mix 20 kg of ferrous sulfate heptahydrate and 2 kg of polyvinyl chloride multifaceted hollow spheres with an average inner diameter of 3 mm, heat until ferrous sulfate heptahydrate is hydrolyzed, add 70 kg of deionized water and mix evenly, and...

Embodiment 3

[0030] A method for preparing composite microspheres for coagulation and adsorption, comprising the steps of: adding 6 kg of a 13 wt % sulfuric acid solution into 45 kg of a 1.7 mol / L sodium aluminate solution, stirring at room temperature until the pH of the solution is 8- 8.8, filter, wash the precipitate, add 0.4kg of polyvinyl alcohol, 55kg of 26wt% ethanol solution and stir for 6min at a stirring temperature of 150°C, add 0.18kg of ammonium bromide and 0.6kg of cetyltrimethylammonium chloride Mix evenly, and spray-dry the composite microspheres for coagulation and adsorption at 135°C.

[0031] A method for preparing a coagulation adsorbent, comprising the steps of:

[0032] S1. Mix 14 kg of ferrous sulfate heptahydrate and 6 kg of polyvinyl chloride polyhedral hollow spheres with an average inner diameter of 3 mm, heat until ferrous sulfate heptahydrate is hydrolyzed, add 50 kg of deionized water and mix evenly, and use a concentration of 0.8mol / L for hydrogen oxidation ...

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PUM

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Abstract

The invention discloses a preparation method for a composite microsphere used for coagulation adsorption. The preparation method for the composite microsphere comprises the following steps: adding a sulfuric acid solution into a sodium aluminate solution, carrying out stirring at normal temperature until the pH value of a solution is 8-8.8, then carrying out filtering, washing a precipitate, adding polyvinyl alcohol and an ethanol solution, then adding ammonium bromide and cetyltrimethylammonium chloride, carrying out uniform mixing, and then performing spray drying so as to obtain the composite microsphere used for coagulation adsorption. The invention discloses a preparation method for a coagulation adsorbent. The preparation method for the coagulation adsorbent comprises the following steps: uniformly mixing ferrous sulfate heptahydrate and polyvinyl chloride polyhedral hollow spheres, carrying out heating until the ferrous sulfate heptahydrate is hydrolyzed, adding deionized water,carrying out uniform mixing, adjusting a system to a neutral pH value, and carrying out filtration and drying so as to obtain a pretreated material; and stirring the pretreatment material, the abovecomposite microsphere, diethylene triamine penta(methylenephosphonic acid), zeolite powder, sodium lignosulfonate, chitosan, sodium methylene dinaphthalene sulfonate, aluminum polyphosphate, diacetoneacrylamide, phosphonate and deionized water, adjusting the pH value of the system, and carrying out granulation and drying successively so as to obtain the coagulation adsorbent.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a preparation method of composite microspheres for coagulation adsorption, a preparation method and application of a coagulation adsorbent. Background technique [0002] The high turbidity river water caused by sand mining is the main cause of river pollution at present. It contains a large amount of fine-grained inorganic sediment, which flows for a long time without settlement. Coagulation technology is the most common application in sewage treatment and surface water purification. chemical restoration techniques. For suspended solids, colloids and sediment in water bodies, the chemical technology of coagulation and adsorption can make suspended solids and sediment aggregate and combine into larger specific gravity particles, which can accelerate the settlement of such substances and fix pollutants in the particles. Coagulation adsorption technology has the advantage o...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28
CPCB01J20/08B01J20/16B01J20/22B01J20/223B01J20/265B01J20/28016B01J20/28047C02F1/288C02F2103/007
Inventor 晏继斌
Owner WUHU XINDA LANDSCAPING GRP
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