Preparation method of biomass adsorption material for treating heavy metals in domestic sewage

A technology for biomass adsorption and domestic sewage, which is applied in the field of preparation of biomass adsorption materials, can solve the problems of low selectivity, restriction, and poor removal effect of heavy metals, and achieve the effect of good adsorption effect and large specific surface area.

Active Publication Date: 2020-05-01
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the adsorption method is the most effective method to recover trace heavy metal elements, which has the advantages of low cost, fast processing speed and wide application range, but it is easily restricted by adsorbents and has low selectivity.
Adsorbents ...

Method used

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  • Preparation method of biomass adsorption material for treating heavy metals in domestic sewage

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Effect test

Embodiment 1

[0024] A preparation method for a biomass adsorption material for heavy metal treatment in domestic sewage, comprising the following steps:

[0025] Step 1. Treat 100g of rice husk in low-temperature corona irradiation equipment for 15min, then add 10g of ammonium carbonate and 10g of melamine in a mixed solution for ultrasonic soaking for 30min, and then filter to obtain pretreated rice husk; The atmosphere treated in the irradiation equipment is air, the temperature is 35°C, the voltage is 10KV, and the distance is 3cm; the power of ultrasonic soaking is 350W, and the ultrasonic frequency is 30kHz; the concentration of the mixed solution is 20g / L; Treating the rice husk to increase the content of active polar functional groups on the surface of the rice husk, deepen the grooves on the surface of the rice husk, increase the specific surface area, and further improve its heavy metal adsorption performance;

[0026] Step 2, using a twin-screw extrusion extruder to extrude and e...

Embodiment 2

[0031] A preparation method for a biomass adsorption material for heavy metal treatment in domestic sewage, comprising the following steps:

[0032] Step 1: Treat 100g of rice husk in a low-temperature corona irradiation device for 10min, then add 10g of ammonium carbonate and 10g of melamine and ultrasonically soak in a mixed solution for 25min, then filter to obtain pretreated rice husk; The atmosphere treated in the equipment is air, the temperature is 30°C, the voltage is 15KV, and the distance is 2cm; the power of ultrasonic soaking is 350W, and the ultrasonic frequency is 30kHz; the concentration of the mixed solution is 20g / L;

[0033] Step 2, using a twin-screw extrusion extruder to extrude and expand the pretreated rice husk to obtain puffed rice husk; the sleeve temperature of the twin-screw extrusion extruder is 75°C, the screw speed is 120r / min, and the die aperture is 25mm;

[0034]Step 3. Add 12g of rice husk puffed product, 1g of methyl acrylate and 3g of allyl...

Embodiment 3

[0038] A preparation method for a biomass adsorption material for heavy metal treatment in domestic sewage, comprising the following steps:

[0039] Step 1. Treat 200g rice husks in low-temperature corona irradiation equipment for 10min, then add 20g ammonium carbonate and 20g melamine in a mixed solution for ultrasonic soaking for 25min, and then filter to obtain pretreated rice husks; The atmosphere treated in the lighting equipment is air, the temperature is 25°C, the voltage is 18KV, and the distance is 5cm; the power of ultrasonic soaking is 350W, and the ultrasonic frequency is 30kHz; the concentration of the mixed solution is 20g / L;

[0040] Step 2, using a twin-screw extruder to extrude and expand the pretreated rice husk to obtain puffed rice husk; the sleeve temperature of the twin-screw extruder is 60°C, the screw speed is 100r / min, and the die aperture is 15mm;

[0041] Step 3. Add 20g of rice husk puffed product, 2g of methyl acrylate and 6g of allyl thiourea int...

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Abstract

The invention discloses a preparation method of a biomass adsorbing material for treating heavy metals in domestic sewage. The preparation comprises the following steps: treating rice hulls by using low-temperature corona irradiation equipment, adding into a mixed solution of ammonium carbonate and melamine, and carrying out ultrasonic soaking to obtain pretreated rice hulls; extruding and puffingthe pretreated rice hulls by adopting a double-screw extruding and puffing machine to obtain puffed rice hulls; adding the rice hull puffed material, methyl acrylate and allyl thiourea into toluene,then introducing high-purity nitrogen to remove oxygen, and carrying out irradiation grafting under sealing to obtain a rice hull grafted product; mixing the rice hull grafted product, graphene oxideand amino acid, then adding the mixture into a ball milling tank, and carrying out low-temperature ball milling; and adding the ball-milled material into water, carrying out high-temperature and high-pressure soaking and swelling treatment, and filtering to obtain the biomass adsorbing material. The biomass adsorption material obtained by the preparation method has the characteristic of large specific surface area, and has a good adsorption effect on heavy metals in rural sewage.

Description

technical field [0001] The invention relates to a preparation method of a biomass adsorption material, in particular to a preparation method of a biomass adsorption material used for heavy metal treatment in domestic sewage. Background technique [0002] With the development of rural areas and the improvement of living standards, the amount of domestic sewage in rural areas continues to increase, and the rural environment is declining. The focus of environmental pollution has gradually shifted from cities to towns and villages. Rural domestic and production wastewater contains a large amount of organic and inorganic Pollutants, especially in the process of rural livestock and poultry breeding, if unqualified feed containing additives such as Cu, Zn, As, Cd, Cr, Pb and Hg is used, the long-term application of livestock and poultry manure and its compost products will have a negative impact on farmland heavy metals. The pollution of the environment is becoming more and more se...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/24B01J20/28066C02F1/286C02F2101/20
Inventor 竹文坤何嵘杨帆周建陈涛雷佳姚丕荣
Owner SOUTHWEAT UNIV OF SCI & TECH
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