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Organic wastewater modified bentonite adsorbent and preparation method thereof

A technology of organic wastewater and bentonite, which is applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc. Low cost, improved adsorption capacity, and the effect of increasing layer spacing

Inactive Publication Date: 2011-08-17
HUNAN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of a large amount of organic quaternary ammonium salt surfactants and cleaning water as well as synergistic modifications such as microwave and ultrasonic in the process of preparing organically modified bentonite, the amount of wastewater and pollutants increased, while production costs and investment Both have been improved, and the promotion and application have been affected

Method used

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  • Organic wastewater modified bentonite adsorbent and preparation method thereof
  • Organic wastewater modified bentonite adsorbent and preparation method thereof
  • Organic wastewater modified bentonite adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Example 1: Add 50g of sodium bentonite to 500mL of distilled water, keep the temperature in the water bath at 60°C, keep stirring for 24 hours, then let it stand for 6 hours, discard the sand at the bottom, and take the supernatant for suction filtration. The filtrate can be used for the next purification. Dry in an oven at 90°C, grind and pass through a 200-mesh sieve to obtain refined bentonite for future use.

[0020] Take 2L of pyrimidinol wastewater (the concentration of pyrimidinol is about 5000 mg / L), and adjust the pH to 2 with sulfuric acid with a concentration of 2 mol / L. Add 2g of refined bentonite powder, stir and react at room temperature for 1 hour, filter with suction, place in an oven and bake at 90°C for 5 hours, grind, then place in a muffle furnace and heat to 350°C at a heating rate of 40°C / min, then roast After 4 hours, a black-gray product was obtained after cooling down, the yield was 2.17 g, and the product number was MMT-1.

example 2

[0021] Example 2: Obtain purified bentonite according to the process in Example 1.

[0022] Take 10L of furanol wastewater (furanol concentration is about 5000mg / L), first use sulfuric acid with a concentration of 10mol / L to roughly adjust the pH, and then use sulfuric acid with a concentration of 2mol / L to adjust the pH to 3. Add 1g of refined bentonite powder, stir and react at room temperature for 2 hours, filter with suction, place in an oven and bake at 100°C for 5 hours, grind, then place in a muffle furnace and heat to 280°C at a heating rate of 40°C / min. After roasting for 2 hours, a black-gray product was obtained after cooling down. The yield was 1.02 g, and the product number was MMT-2.

example 3

[0023] Example 3: The organic waste water modified bentonite of the present invention is applied to the adsorption and roasting cycle test of pyrimidinol waste water: get the organic waste water modified bentonite obtained in the above example 1 as the adsorbent, and follow the waste water treatment process.

[0024] 1. Take 100mL of pyrimidinol wastewater, the initial concentration of pyrimidinol is 5000mg / L, the COD is 27000mg / L, and the chroma is 100 times;

[0025] 2. Adjust the pH to 3.0-5.0;

[0026] 3. Add organic bentonite to the wastewater, and the amount of adsorbent is 0.5g / 100mL water sample;

[0027] 4. Stir at room temperature for 15 minutes;

[0028] 5. Stand still for 15 minutes, take the supernatant and measure the concentration of residual pyrimidinol by liquid chromatography, the results show that the concentration of residual pyrimidinol is 500 mg / L, and the removal rate reaches 90%; use potassium dichromate microwave digestion method to analyze the remain...

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Abstract

The invention discloses an organic wastewater modified bentonite absorbent and a preparation method of the absorbent. The preparation method comprises the following steps: taking organic amine type of pollutants in organic wastewater as modifying agents, taking purified bentonite powder as raw materials, adding the purified bentonite powder into the organic amine type of wastewater to agitate for 10-120 minutes at the normal temperature, and then filtering to obtain an organic wastewater modified bentonite filter cake; drying and grinding the organic wastewater modified bentonite filter cake under the condition of 90-105 DEG C to obtain organic wastewater modified bentonite, then placing the organic wastewater modified bentonite into a muffle furnace for roasting, and cooling to the normal temperature to obtain the organic wastewater modified bentonite adsorbent. The organic wastewater modified bentonite adsorbent and the preparation method have the advantages that firstly, the pollutants in the wastewater are taken as the modifying agents to realize the effect of treating the wastes with the wastes; secondly, the modification time is short; thirdly, the pollutant removal efficiency is high, and the decoloring effect is remarkable; fourthly, the solid-liquid separation is quick; and fifthly, the processing cost is low.

Description

technical field [0001] The invention relates to an organic waste water modified bentonite adsorbent and a preparation method thereof. Background technique [0002] Bentonite is a hydrated layered aluminosilicate, which belongs to the hydrated aluminosilicate mineral with a crystal form of 2:1 three-layer structure. Each crystal layer is composed of two layers of silicon-oxygen tetrahedron sandwiching a layer of aluminum-oxygen octahedron. The oxygen at the top of the tetrahedron points to the center of the structural layer to share with the octahedron, and connects the three layers together. This structure extends infinitely along the a and b axes, and overlaps at a certain interval along the c axis. A number of these wafers stack spontaneously on top of each other to form bentonite particles. The wafer layers are connected by weak van der Waals bonding or electrostatic interaction, and the layers are easily dissociated and sometimes slide against each other. [0003] Ben...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F1/58C02F101/38
Inventor 张燕黄明智邱德跃陈灿秦岳军庞怀林
Owner HUNAN CHEM RES INST
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