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Preparation method of modified macadamia shell adsorbent

A nut shell and adsorbent technology, applied in the field of preparation of modified macadamia nut shell adsorbent, can solve the problems of complex production process, difficult regeneration and high cost, and achieve the effects of good chemical stability, great application value and low cost

Active Publication Date: 2015-01-14
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems such as complex manufacturing process, difficult regeneration, and high cost.
[0005] At present, there are not many papers and patents on the use of modified biomass materials to treat printing and dyeing wastewater, and there is no method of using citric acid and ethylenediamine to modify macadamia nut shell powder as an adsorbent for adsorption and removal of printing and dyeing wastewater.

Method used

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  • Preparation method of modified macadamia shell adsorbent
  • Preparation method of modified macadamia shell adsorbent
  • Preparation method of modified macadamia shell adsorbent

Examples

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Effect test

Embodiment 1

[0028] A preparation method of a modified macadamia nut shell adsorbent, comprising the following steps

[0029] Step 1, pretreatment step: washing, crushing and sieving macadamia nut shells to obtain standby macadamia nut shell powder;

[0030] Step 2, acid treatment step: Add 1g of citric acid, 6ml of concentrated sulfuric acid and 40ml of deionized water to 2g of macadamia nut shell powder with a particle size greater than 120 mesh in sequence, mix the materials, boil for 60min and cool, then deionize the macadamia nut shell powder with deionized water Wash the nutshell powder until it is neutral, then put it in an oven and dry it at 105°C;

[0031] Step 3, amino modification step: Add 20ml of ethylenediamine, 0.9g of sodium carbonate and 15ml of deionized water to 1g of the macadamia nut shell powder prepared in step 2 in sequence, place the mixture at 80°C and stir for 60min at a constant temperature, and carry out modified;

[0032] Step 4, washing the modified macadam...

Embodiment 2

[0034] A preparation method of a modified macadamia nut shell adsorbent, comprising the following steps

[0035] Step 1, pretreatment step: washing, crushing and sieving macadamia nut shells to obtain standby macadamia nut shell powder;

[0036] Step 2, acid treatment step: Add 3g of citric acid, 2ml of concentrated sulfuric acid and 20ml of deionized water to 2g of macadamia nut shell powder with a particle size greater than 120 mesh in sequence, mix the materials, boil for 180min and cool, then use deionized water to deionize the macadamia nut shell powder. Wash the nutshell powder until it is neutral, then put it in an oven and dry it at 60°C;

[0037] Step 3, amino modification step: Add 10ml of ethylenediamine, 0.3g of sodium carbonate and 5ml of deionized water to 1g of the macadamia nut shell powder prepared in step 2 in sequence, place the mixture at 60°C and stir for 300min at a constant temperature, and carry out modified;

[0038] Step 4, washing the modified maca...

Embodiment 3

[0040] A preparation method of a modified macadamia nut shell adsorbent, comprising the following steps

[0041] Step 1, pretreatment step: washing, crushing and sieving macadamia nut shells to obtain standby macadamia nut shell powder;

[0042] Step 2, acid treatment step: Add 2g of citric acid, 6ml of concentrated sulfuric acid and 30ml of deionized water to 2g of macadamia nut shell powder with a particle size greater than 120 mesh in sequence, mix the materials, boil for 120min and cool, then use deionized water to deionize the macadamia nut shell powder. Wash the nutshell powder until it is neutral, then put it in an oven and dry it at 80°C;

[0043] Step 3, amino modification step: add 15ml of ethylenediamine, 0.9g of sodium carbonate and 10ml of deionized water to 1g of the macadamia nut shell powder prepared in step 2 in sequence, place the mixture at 70°C and stir for 180min at a constant temperature, and carry out modified;

[0044] Step 4, washing the modified macad...

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Abstract

The invention discloses a method for preparing a modified macadamia shell adsorbent. According to the method, a waste biologic material, macadamia shells, is taken as a raw material, pollutants on the surface of the adsorbent can be cleaned by pretreatment, carboxyl on the surface of the adsorbent can be increased by acid treatment, and amino on the surface of the adsorbent can be increased by ethidene diamine. The preparation method is simple in preparation technology and low in cost; the obtained adsorbent has the advantages of being large in specific surface area, good in chemical stability, high in mechanical strength, easy in regeneration, and the like, and has a good effect of removing dye waste water, thus having great application value.

Description

technical field [0001] The invention relates to a preparation method of a modified macadamia nut shell adsorbent used for treating printing and dyeing wastewater, and belongs to the field of material preparation. Background technique [0002] With the rapid development of my country's economy, environmental issues have attracted more and more attention. Among environmental problems, the discharge of printing and dyeing wastewater is one of the main obstacles restricting the development of my country's textile industry. my country is a big producer of dyestuffs. According to statistics, in the production and treatment of dyestuffs, about 12% are discharged in the form of waste water. This data shows that the problem of printing and dyeing wastewater discharge in my country is very serious, and it is one of the problems that need to be solved urgently. The methods for treating printing and dyeing wastewater include electrochemical method, coagulation sedimentation method, ox...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F103/30
CPCB01J20/24B01J20/305B01J2220/4875C02F1/286C02F2103/30
Inventor 冯骞杨雯薛朝霞操家顺周彬宇章震李一洲秦敏敏忻亥笑
Owner HOHAI UNIV
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