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Beta-type-hydroxyl-ferric-oxide-loaded natural-cellulose-modified functional material and preparing method and application thereof

A natural cellulose and iron oxyhydroxide technology, applied in chemical instruments and methods, oxidized water/sewage treatment, and other chemical processes, can solve problems such as high cost, failure to meet discharge standards, and high salinity, and achieve strong adsorption capacity Effect

Active Publication Date: 2016-07-20
YUNNAN SHENGQING ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process section, chemical precipitation and electrocoagulation are mainly used for flocculation and precipitation. Although most of the heavy metal ions and arsenic in water can be removed, Ca is introduced into the process. 2+ , Fe ions, Al 3 + , SO4 2- Plasma, in the advanced treatment stage, in order to meet the current national standards, advanced treatment processes such as membrane filtration and reverse osmosis are generally used at the end. Although the arsenic content of the effluent can be treated to 0.01mg / L, the concentrated water produced has high conductivity. High salt content, intercepted arsenic ions are also included, and cannot meet the emission standards
This part of concentrated water has the characteristics of difficult treatment and high cost

Method used

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  • Beta-type-hydroxyl-ferric-oxide-loaded natural-cellulose-modified functional material and preparing method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0057] A method for preparing a modified natural cellulose functional material loaded with β-type iron oxyhydroxide, comprising the steps of:

[0058] Step (1), preparation of natural cellulose:

[0059] a. Add bagasse to the mixed solvent of ethanol and toluene, stir the reaction at room temperature for 5.5h, filter, wash the filter residue with deionized water to remove the solvent; the solid-liquid ratio of bagasse to ethanol is 1:10; bagasse The solid-to-liquid ratio with toluene is 1:4;

[0060] b. Add the filter residue after washing in step a to the NaClO acidified by acetic acid 2 In the solution, react at 74°C for 1.5h to remove lignin, filter, wash the filter residue with deionized water until neutral, and set aside; bagasse and NaClO acidified with acetic acid 2 The solid-to-liquid ratio of the solution is 1:5.5; the NaClO acidified with acetic acid 2 The solution was prepared by dissolving NaClO 2 Add it to deionized water whose mass is 24 times its mass, and t...

Embodiment 2

[0070] A method for preparing a modified natural cellulose functional material loaded with β-type iron oxyhydroxide, comprising the steps of:

[0071] Step (1), preparation of natural cellulose:

[0072] a. Add bagasse to the mixed solvent of ethanol and toluene, stir and react at room temperature for 5h, filter, wash the filter residue with deionized water to remove solvent; the solid-liquid ratio of bagasse to ethanol is 1:12; bagasse and The solid-to-liquid ratio of toluene is 1:5;

[0073] b. Add the filter residue after washing in step a to the NaClO acidified by acetic acid 2 In the solution, react at 75°C for 1.6h to remove lignin, filter, wash the filter residue with deionized water until neutral, and set aside; bagasse and NaClO acidified with acetic acid 2 The solid-to-liquid ratio of the solution is 1:5.7; the NaClO acidified with acetic acid 2 The solution was prepared by dissolving NaClO 2 Add it to deionized water 25 times its mass, and then adjust the pH to ...

Embodiment 3

[0083] A method for preparing a modified natural cellulose functional material loaded with β-type iron oxyhydroxide, comprising the steps of:

[0084] Step (1), preparation of natural cellulose:

[0085] a. Add bagasse to a mixed solvent of ethanol and toluene, stir and react at room temperature for 6.5 hours, filter, wash the filter residue with deionized water to remove the solvent; the solid-to-liquid ratio of bagasse to ethanol is 1:15; bagasse The solid-to-liquid ratio with toluene is 1:6;

[0086] b. Add the filter residue after washing in step a to the NaClO acidified by acetic acid 2 In the solution, react at 76°C for 2 hours to remove lignin, filter, wash the filter residue with deionized water until neutral, and set aside; bagasse and NaClO acidified with acetic acid 2 The solid-to-liquid ratio of the solution is 1:6; the acetic acid acidified NaClO 2 The solution was prepared by dissolving NaClO 2 Add it to deionized water whose mass is 26 times its mass, and th...

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Abstract

The invention relates to a beta-type-hydroxyl-ferric-oxide-loaded natural-cellulose-modified functional material and a preparing method and application thereof, and belongs to the technical field of industrial wastewater treatment.The preparing method of the material includes the steps of preparing natural cellulose, modifying the natural cellulose and loading beta-type hydroxyl ferric oxide.The prepared functional material has more adsorption point locations and multiple adsorption performances, other ions and salt in water can be adsorbed, and the problem of strong brine treatment generated during deep treatment of arsenious wastewater at present is solved.The functional material is high in adsorption capability, the concentration of discharged treated arsenious wastewater is lower than 0.05 mg / L, selective desorption can be carried out according to different adsorption modes, and the function material is easy to degrade, free of environmental toxicity and easy to apply and popularize.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to a functional material loaded with β-type iron oxyhydroxide modified natural cellulose and its preparation method and application. Background technique [0002] Arsenic is a protoplasmic poison that can produce toxicity by interacting with the sulfhydryl group (-SH) of proteins and enzymes (denaturing proteins and enzymes in cells) and increasing reactive oxygen species in cells to cause cell damage, which has been controlled by the United States Center (CDC) and the International Agency for Research on Cancer (IARC) identified as the first class of carcinogens. Arsenic is also genotoxic and is a World Health Organization (WHO) priority pollutant. [0003] At present, the arsenic removal technologies at home and abroad mainly include precipitation method, ion exchange method, membrane separation method, biological method and adsorption method, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F9/04
CPCB01J20/06B01J20/24B01J2220/46B01J2220/4806B01J2220/4812B01J2220/4825C02F1/281C02F1/286C02F1/52C02F1/5245C02F1/5281C02F1/72C02F9/00C02F2101/103C02F2301/08
Inventor 杨勤
Owner YUNNAN SHENGQING ENVIRONMENTAL PROTECTION TECH CO LTD
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