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Cellulose-based composite adsorbent for wastewater treatment

A cellulose-based, composite adsorption technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of non-biodegradable, high production cost, secondary pollution, etc. Achieve the effects of enhancing adsorption performance, increasing porosity, and efficient utilization

Inactive Publication Date: 2021-03-12
杭州鹿扬科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many kinds of adsorbents. Currently, activated carbon, bentonite, synthetic fibers, polymers, etc. are commonly used. Many of these materials are non-renewable or non-biodegradable, which makes the production cost high or causes secondary pollution.

Method used

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  • Cellulose-based composite adsorbent for wastewater treatment
  • Cellulose-based composite adsorbent for wastewater treatment
  • Cellulose-based composite adsorbent for wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of cellulose-based composite adsorbents for wastewater treatment:

[0036] S1: Bagasse pretreatment, remove impurities from the bagasse raw material, add 3% sodium hydroxide solution to boil for 20 minutes, wash with water, dry and cut into pieces; then carry out ultrasonic-lye-ultrasonic combined pretreatment: disperse the bagasse In water, control the solid-liquid ratio to 1:30g / mL, and then ultrasonically treat it for 15min; after filtering, place it in a 10% sodium hydroxide solution and boil it for 60min, and control the solid-liquid ratio to 1:30g / mL, Continue ultrasonic treatment for 30 minutes, filter, wash with water until neutral and dry to obtain alkali fiber;

[0037] S2: chemical modification, using sodium perdianate to carry out oxidation treatment to the alkali fiber: the alkali fiber is added to a concentration of 12g / L sodium periodate-ethanol (5%) solution (alkali fiber and periodic acid The solid-to-liquid ratio of sodium is 1:40g / mL), re...

Embodiment 2

[0043] The preparation process is consistent with Example 1, except that the acid anhydride in the preparation process is: succinic anhydride; the mass ratio of oxidized cellulose, acid anhydride, guanosine and diaminopimelic acid is 1:5:5.5:10.

Embodiment 3

[0045] The preparation process is the same as in Example 1, except that the acid anhydride in the preparation process is: succinic anhydride; the mass ratio of oxidized cellulose, acid anhydride, guanosine and diaminopimelic acid is 1:5.5:6.5:11.

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Abstract

The invention discloses a cellulose-based composite adsorbent for wastewater treatment, belonging to the technical field of adsorbents for wastewater treatment. The preparation method of the cellulose-based composite adsorbent comprises the following steps: pretreating bagasse, namely after bagasse raw materials are separated, purified and crushed, carrying out ultrasonic wave-alkali liquor-ultrasonic wave combined pretreatment to generate alkali fibers; carrying out chemical modification, namley carrying out oxidation treatment on the alkali fibers by adopting sodium periodate to obtain oxidized fibers; putting the oxidized fibers into a reaction medium, adding acid anhydride for a reaction, successivly conducting washing, dipping, filtering and drying, and carrying out an esterificationreaction with guanosine to obtain a product A; and putting the product A into an aqueous diaminopimelic acid solution for a constant-temperature reaction, and then carrying out washing and drying to obtain the cellulose-based composite adsorbent. The cellulose-based composite adsorbent for wastewater treatment prepared by the invention has high adsorption performance and shows a good removal effect on heavy metal ions and printing and dyeing wastes in wastewater; and the adsorbent is recyclable, simple to operate and high in adsorption efficiency.

Description

technical field [0001] The invention belongs to the technical field of adsorbents for wastewater treatment, in particular to cellulose-based composite adsorbents for wastewater treatment. Background technique [0002] With the development of industrialization and population growth, a large amount of industrial and domestic wastes have been produced, and more and more water sources have been polluted. The most common pollution in my country's surface water is organic pollution, heavy metal pollution, eutrophic pollution and its compound pollution. The problem of water pollution has become an important factor restricting economic development and endangering human health. With the development and transformation and upgrading of my country's economy, the requirements for environmental protection are becoming stronger and stronger. Therefore, the development and application of new non-toxic and harmless water treatment agents has become a Water pollution control is a research hot...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C08B15/06C02F1/28C02F101/20C02F101/30
CPCB01J20/24C02F1/286C02F2101/20C02F2101/308C08B15/06
Inventor 不公告发明人
Owner 杭州鹿扬科技有限公司
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