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Prepn process of magnetic composite organic bentonite as water treating material

A technology of bentonite and water treatment, which is applied in the direction of adsorption of water/sewage treatment, clay products, and other household appliances. It can solve the problems of reducing use value, increasing investment in infrastructure and human capital, and slow settlement speed, achieving strong practicality. Value, good solid-liquid separation effect, effect of improving adsorption capacity

Inactive Publication Date: 2005-09-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Generally, the organic bentonite obtained from organically modified bentonite has poor dispersion and precipitation properties due to its surface hydrophobicity, and it is difficult to separate solid and liquid in the actual use process, which reduces its use value.
Although inorganic pillared bentonite and various other modification methods have improved dispersion performance, they only rely on natural gravity to settle in terms of solid-liquid separation, and the settling speed is slow, which is time-consuming and increases infrastructure and manpower in the process of wastewater treatment. capital investment

Method used

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  • Prepn process of magnetic composite organic bentonite as water treating material

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The dried and crushed bentonite raw soil, FeCl 3 and FeSO 4 Each 20g, 8.2g, and 4.1g was added distilled water to 700mL to make a suspension, placed in a constant temperature water bath at 70°C, and 100mL of a 5mol / L NaOH solution was added dropwise with stirring, and the stirring was continued for 3 hours. The product was washed with distilled water for 3 times and dried at 110°C. After grinding, it was added to 600 mL of 2 mmol / L cetyltrimethylammonium bromide solution, stirred for 5 hours, and aged at room temperature for 12 hours. The product was washed and filtered several times, dried at 60°C, and ground to obtain magnetic composite organic bentonite (MOB 1 ).

[0019] In the 50mL iodine bottle, add 20mL of the mixed solution of phosphate and phenanthrene, wherein the concentration of phosphate is 20mg / L (in PO 4 3- meter), the concentration of phenanthrene is 50mg / L, then add 0.05g of MOB 1 , shake at a constant temperature of 25°C for 2 hours, and measure t...

Embodiment 2

[0021] 20g of bentonite raw soil and FeCl that were dried and crushed through a 100-mesh sieve 3 , FeSO 4 Each 7.9g and 3.9g was added distilled water to 600mL to form a suspension, placed in a constant temperature water bath at 70°C, and 100mL of 5mol / L NaOH solution was added dropwise with stirring. Stirring was continued for 4 hours; the product was washed with distilled water for 4 times and then dried at 100°C. After grinding, it was added to 400 mL of 3 mmol / L dodecyltrimethylammonium bromide solution, stirred for 5 hours, and aged at room temperature for 12 hours. hours, the product was washed and filtered several times, dried at 60°C, and ground to obtain magnetic composite organobentonite (MOB 2 ).

[0022] In the typical measuring bottle of 50mL, add the mixed solution of 20mL phosphate radical and ethyl naphthol, wherein the concentration of phosphate radical is 15mg / L (in PO 4 3- meter), the concentration of ethyl naphthol is 20mg / L, then add the MOB of 0.05g ...

Embodiment 3

[0024] 15g of bentonite raw soil and FeCl that were dried and crushed through a 150-mesh sieve 3 , FeSO 4 Each 7.8g and 3.9g was added distilled water to 600mL to form a suspension, placed in a constant temperature water bath at 80°C, and 80mL of 6mol / L NaOH solution was added dropwise under stirring. Stirring was continued for 3 hours; the product was dried at 120°C, and after grinding, it was added to 400 mL of 3 mmol / L octadecyltrimethylammonium bromide solution, stirred for 6 hours, and aged at room temperature for 10 hours. After washing and filtering, dry at 80°C and grind to obtain magnetic composite organobentonite (MOB 3 ).

[0025] In the typical measuring bottle of 50mL, add the mixed solution of 20mL phosphate radical and ethyl naphthol, wherein the concentration of phosphate radical is 25mg / L (in PO 4 3- meter), the concentration of ethyl naphthol is 20mg / L, then add the MOB of 0.05g 3 , shake at a constant temperature of 25° C. for 2 hours, and measure the c...

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Abstract

The preparation process of magnetic composite organic bentonite as waste water treating material includes the following steps: 1) drying, crushing and sieving bentonite, mixing with FeCl3, FeSO4 and water in certain proportion to obtain suspension, and dropping sodium hydroxide solution while stirring; 2) washing the deposit with distilled water and stoving at 110-120 deg.c; and 3) grinding, adding cationic surfactant solution while stirring, ageing at room temperature for 10-12 hr, washing and filtering, stoving at 60-80 deg.c, grinding and 60-100 mesh sieving. The waste water treating material of the present invention can eliminating organic pollutant and acid radical pollutant from waste water and has excellent deposition separating performance.

Description

technical field [0001] The invention relates to a preparation method of magnetic composite organic bentonite as a water treatment material. Background technique [0002] my country's water resources are short, and water pollution is becoming more and more serious. For example, in 2003, the total discharge of wastewater in the country was 46 billion tons, an increase of 4.7% over the previous year. Among them, industrial wastewater discharge was 21.24 billion tons, accounting for 46.2% of the total wastewater discharge, an increase of 2.5% over the previous year; urban domestic sewage discharge was 24.76 billion tons, accounting for 53.8% of the total wastewater discharge, an increase of 6.6% over the previous year. The discharge of chemical oxygen demand in wastewater was 13.336 million tons. [0003] At present, my country's industrial and urban domestic wastewater is generally mixed and then concentrated, resulting in a large amount of organic pollutants, phosphate and v...

Claims

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Application Information

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IPC IPC(8): C02F1/28C04B33/04
Inventor 朱利中马建锋
Owner ZHEJIANG UNIV
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