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Carboxymethyl konjac glucomannan microsphere adsorbent for phosphorus removal and preparation method thereof

A konjac glucomannan and microsphere adsorption technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc. Expensive and other problems, to achieve the effect of fast adsorption, easy disposal and low cost

Active Publication Date: 2019-08-20
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carboxymethyl konjac glucomannan is a polyanionic polymer polysaccharide, and the -CH in its molecule 2 OCH 2 COO - It can complex with high-valent metal ions to form a gel, which increases the adsorption sites of anions. Therefore, it can be used as a raw material to prepare high-capacity adsorption materials, which can efficiently remove PO 4 3- 、HPO 4 2- 、H 2 PO 4 - and other anions. It has been reported in the literature that rare earth elements have a strong attraction to anions. However, rare earth materials are usually very expensive, which limits their application in the field of wastewater treatment. Therefore, rare earth elements are doped with some cheap metals, such as Fe , Al, etc., thereby reducing the preparation cost of the adsorbent

Method used

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  • Carboxymethyl konjac glucomannan microsphere adsorbent for phosphorus removal and preparation method thereof
  • Carboxymethyl konjac glucomannan microsphere adsorbent for phosphorus removal and preparation method thereof
  • Carboxymethyl konjac glucomannan microsphere adsorbent for phosphorus removal and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0041] A preparation method for carboxymethyl konjac glucomannan gel microsphere adsorbent for phosphorus removal, comprising the following steps:

[0042] Step 1. Mix carboxymethyl konjac glucomannan and ultrapure water according to the ratio of mass volume ratio of 3:97 and stir evenly, so that carboxymethyl konjac glucomannan is fully swollen and degassed to obtain 3wt% sol;

[0043] Step 2: Spray the sol into the ferric chloride solution with a mass concentration of 3wt% at a uniform speed using the electrospray method, then add 1 volume part of epichlorohydrin, stir, cross-link for 5 hours, filter, and dry at 50°C After 12 hours, the carboxymethyl konjac glucomannan microsphere adsorbent used for phosphorus removal was obtained; the electrospray method was: inject the sol into a spray container with a stainless steel nozzle, and then apply a voltage to the stainless steel nozzle with a high-voltage power supply and use the propulsion pump connected to the spray container ...

Embodiment 2

[0045] A preparation method for carboxymethyl konjac glucomannan gel microsphere adsorbent for phosphorus removal, comprising the following steps:

[0046] Step 1. Mix carboxymethyl konjac glucomannan and ultrapure water according to the ratio of mass volume ratio of 3:97 and stir evenly, so that carboxymethyl konjac glucomannan is fully swollen and degassed to obtain 3wt% sol;

[0047] Step 2: Spray the sol into the solution of 3wt% ferric chloride and 6wt% cerium nitrate compound salt at a uniform speed by electrospray method, then add 1 volume part of epichlorohydrin, stir and crosslink React for 5 hours, filter, and dry at 50°C for 12 hours to obtain the carboxymethyl konjac glucomannan microsphere adsorbent for phosphorus removal; the electrospray method is: inject the sol into a spray container with a stainless steel nozzle, and then use The high-voltage power supply applies voltage to the stainless steel nozzle, and uses the propulsion pump connected to the spray contai...

Embodiment 3

[0049] A preparation method for carboxymethyl konjac glucomannan gel microsphere adsorbent for phosphorus removal, comprising the following steps:

[0050] Step 1. Mix carboxymethyl konjac glucomannan and ultrapure water according to the mass volume ratio of 4:96 and stir evenly, so that carboxymethyl konjac glucomannan is fully swollen and degassed to obtain 4wt% sol;

[0051] Step 2: Spray the sol at a uniform speed into the solution of 3 wt% ferric chloride and 6 wt% lanthanum nitrate compound salt solution by electrospray method, then add 1 volume part of epichlorohydrin, stir and crosslink React for 5 hours, filter, and dry at 50°C for 12 hours to obtain the carboxymethyl konjac glucomannan microsphere adsorbent for phosphorus removal; the electrospray method is: inject the sol into a spray container with a stainless steel nozzle, and then use The high-voltage power supply applies voltage to the stainless steel nozzle, and uses the propulsion pump connected to the spray c...

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Abstract

The invention discloses a carboxymethyl konjac glucomannan microsphere adsorbent for dephosphorization and a preparation method thereof, and belongs to the technical field of adsorption materials and waste water treatment. The method comprises the following steps of dissolving carboxymethyl konjac glucomannan into ultrapure water; performing stirring to obtain sol; using an electronic injection device for spraying the sol into metal salt solution at a uniform speed; performing stirring, crosslinking, filtering and drying to obtain the efficient dephosphorization carboxymethyl konjac glucomannan microsphere adsorbent. The obtained adsorbent has the advantages that the preparation process is simple; the raw materials are cheap and can be easily obtained; the dephosphorization efficiency is high; the biodegradability can be realized after the use of the adsorbent; secondary pollution cannot occur; good application prospects are realized.

Description

technical field [0001] The invention relates to a method for preparing an efficient phosphorus-removing carboxymethyl konjac glucomannan microsphere adsorbent, and belongs to the technical fields of utilization of biomass resources, preparation of biomass adsorption materials and application of wastewater treatment. Background technique [0002] Slaughter wastewater mainly comes from slaughtering industries such as animal husbandry, poultry, and fish. With the continuous improvement of people's living standards in recent decades, the slaughter industry has achieved unprecedented expansion and development. Most cities in my country have basically realized the centralized slaughter of livestock and poultry, and the amount of wastewater discharge is also increasing. The production process of the slaughterhouse is generally: livestock-live livestock pen-slaughter-scalding or skinning and dissection-taking internal organs-refrigeration or export. Almost every process above will ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F103/22C02F101/16
Inventor 林晓艳张小娜罗学刚金勇蔡咏兵
Owner SOUTHWEAT UNIV OF SCI & TECH