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Method for preparing quaternary ammonium salt cationic absorbing agent by using manioc straw/ manioc waste and application

A cationic type, cassava residue technology, applied in the field of environment and chemistry, to achieve the effect of less secondary pollution, good treatment effect, and convenient regeneration

Inactive Publication Date: 2012-11-07
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But for the preparation of cassava straw and cassava dregs quaternary ammonium salt cationic adsorbent and its application in wastewater treatment, there are no related reports at present

Method used

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  • Method for preparing quaternary ammonium salt cationic absorbing agent by using manioc straw/ manioc waste and application
  • Method for preparing quaternary ammonium salt cationic absorbing agent by using manioc straw/ manioc waste and application
  • Method for preparing quaternary ammonium salt cationic absorbing agent by using manioc straw/ manioc waste and application

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: the preparation of quaternary ammonium salt cationic adsorbent

[0028] Wash cassava stalks, dry, crush, take 10g of powder with a particle size of 80 mesh, soak and stir in 2mol / L NaOH 200ml for 10h, filter, wash until neutral, and dry; weigh 2g of the dried product and put it into 50ml of epoxy chlorine Propane and 50ml N,N-dimethylformamide, stirred at 100°C for 1h; then added 3ml of ethylenediamine, stirred at 100°C for 0.5h; added 5ml of triethylamine, stirred at 100°C for 4h; NaOH, HCl, 50% ethanol, and distilled water were washed until neutral, and dried to obtain 1.8 g of quaternary ammonium salt cationic adsorbent. The appearance is yellow powder, the Zeta potential is 42, and the pH value of the aqueous solution is 5.8.

Embodiment 2

[0029] Embodiment 2: Preparation of quaternary ammonium salt cationic adsorbent

[0030]Wash cassava stalks, dry them, crush them, take 15g of powder with a particle size of 80 mesh, soak and stir in 200ml of 3mol / L NaOH for 8h, filter, wash until neutral, and dry; weigh 2g of the dried product and put it into 50ml of epoxy chlorine Propane and 50ml N,N-dimethylformamide, stirred at 100°C for 1h; then added 4ml of ethylenediamine, stirred at 100°C for 0.5h; added 10ml of triethylamine, stirred at 100°C for 4h; NaOH, HCl, 50% ethanol, and distilled water were washed to neutrality, and dried to obtain 1.9 g of cationic adsorbent. The appearance is yellow powder, the Zeta potential is 35, and the pH value of the aqueous solution is 4.9.

Embodiment 3

[0031] Embodiment 3: Preparation of quaternary ammonium salt cationic adsorbent

[0032] Wash cassava stalks, dry them, crush them, take 12g of powder with a particle size of 80 mesh, soak and stir in 200ml of 2mol / L NaOH for 8h, filter, wash until neutral, and dry; weigh 2g of the dried product and put it into 40ml of epoxy chlorine Propane and 40ml N,N-dimethylformamide, stirred at 50°C for 1.5h; then added 5ml of ethylenediamine, stirred at 50°C for 1.5h; added 5ml of triethylamine, stirred at 50°C for 3h; at room temperature, respectively Wash with NaOH, HCl, 50% ethanol, and distilled water until neutral, and dry to obtain 1.8 g of cationic adsorbent. The appearance is yellow-brown powder, the Zeta potential is 33, and the pH value of the aqueous solution is 5.2.

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Abstract

The invention discloses a method for preparing a quaternary ammonium salt cationic absorbing agent by using manioc straw / manioc waste. The method comprises that ground manioc straw and manioc waste are preprocessed by using alkali, N,N-dimethylformamide serves as a reaction medium, quadrol serves as a cross-linking agent, the manioc straw, the manioc waste and epichlorohydrin are subjected to reaction, cellulose ester is generated, the reaction activity is improved, the the manioc straw, the manioc waste and the quadrol are subjected to reaction, a quaternary amine group is introduced, and an cationic ion exchanger is prepared. Under conditions of a room temperature and oscillation, the pH value of waste water is adjusted to be no more than 12, the cationic absorbing agent is added, the solid-to-liquid ratio of the absorbing agent and the waste water is no less than 1g / L, the oscillating time is no less than 30 min, filtering is conducted, and the cationic absorbing agent is separated. According to the method and application, source of raw materials is numerous, the cost is low, the process is simple, and the absorbing agent is economical and applicable, reproducible, high in weight gain and good in stability and absorbing effect and can be used widely in processing of waste water of water body eutrophication, anionic dye and negative ions such as arsenic acid radical, sulfate radical and Cr (VI).

Description

technical field [0001] The invention relates to the technical field of environment and chemistry, in particular to a method and application for preparing a quaternary ammonium salt cationic adsorbent from cassava stalks / cassava residues. Background technique [0002] With the continuous increase of human activities, the pollution of nitrogen and phosphorus in water is becoming more and more serious. A large number of studies have confirmed that nitrogen and phosphorus can stimulate the growth of algae and photosynthetic aquatic organisms, and eventually cause water eutrophication, and phosphorus is considered to be the most important factor that produces water eutrophication. Algae overgrowth has been reported in the literature when total phosphorus concentrations exceed 0.1 mg / l (if phosphorus is the limiting factor) or total nitrogen concentrations exceed 0.3 mg / l (if nitrogen is the limiting factor). Eutrophication of water often leads to disturbance of aquatic ecosystem...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/58
Inventor 康彩艳张敏俊莫蔚明李旺蒙冕武陈孟林陈春强
Owner GUANGXI NORMAL UNIV
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