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Bagasse based adsorbent with high grafting rate, and preparation method and application thereof

A high grafting rate, adsorbent technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of low grafting rate and grafting efficiency, etc. The effect of high grafting efficiency and improving application effect

Active Publication Date: 2014-10-22
GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the commonly used catalyst for grafting modification of bagasse is mohr salt / hydrogen peroxide, but the grafting rate and grafting efficiency are not high, and the grafting rate is only about 40% under the optimal grafting conditions

Method used

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  • Bagasse based adsorbent with high grafting rate, and preparation method and application thereof
  • Bagasse based adsorbent with high grafting rate, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of a high grafting rate bagasse-based adsorbent, comprising the following steps:

[0031] (1) After crushing and sieving the bagasse raw material, take 10.00 g of 20-mesh bagasse, boil it in 200 mL of deionized water at 80° C. for 2 hours, wash it with deionized water, and filter it with suction; then soak the bagasse in 5 wt % Soak in NaOH aqueous solution for 2 hours, take out the bagasse after soaking and wash it with deionized water until neutral, then suction filter; put the dried bagasse into a steam explosion container for steam explosion, set the steam pressure to 1.9MPa, maintain it for 5min and then release the pressure , take out the bagasse; finally add the bagasse to soak in acetone for 1h, then ultrasonicate for 30min at an ultrasonic power of 600W, filter with suction, dry in the air, and weigh 6.38g of pretreated bagasse;

[0032] (2) Pour the bagasse pretreated in step (1) into a three-necked flask, then weigh 20g of acrylamide and ...

Embodiment 2

[0038] A preparation method of a high grafting rate bagasse-based adsorbent, comprising the following steps:

[0039](1) After pulverizing and sieving the bagasse raw material, take 10.00 g of 30-mesh bagasse, boil it in 120 mL of deionized water at 80° C. for 2 hours, wash it with deionized water, and filter it with suction; then soak the bagasse in 12 wt % Soak in NaOH aqueous solution for 1 hour, take out the bagasse after soaking and wash it with deionized water until it is neutral, and then filter it; put the dried bagasse into a steam explosion container for steam explosion, set the steam pressure to 1.8MPa, maintain it for 8 minutes, and then release the pressure , take out the bagasse; finally add the bagasse to ethanol and soak for 50min, then ultrasonicate for 60min under the ultrasonic power of 300W, filter with suction, dry in the air, and weigh 5.64g of bagasse after pretreatment;

[0040] (2) Pour the bagasse pretreated in step (1) into a three-necked flask, then...

Embodiment 3

[0045] A preparation method of a high grafting rate bagasse-based adsorbent, comprising the following steps:

[0046] (1) After pulverizing and sieving the bagasse raw material, take 10.00 g of 20-mesh bagasse, boil it in 300 mL of deionized water at 80° C. for 2 hours, wash it with deionized water, and filter it with suction; then soak the bagasse in 3 wt % Soak in NaOH aqueous solution for 12 hours. After soaking, take out the bagasse and wash it with deionized water until neutral, then filter it; put the dried bagasse into a steam explosion container for steam explosion, set the steam pressure to 2.7MPa, and release the pressure after maintaining it for 2 minutes , take out the bagasse; finally add the bagasse to methanol and soak for 20min, then ultrasonicate for 15min at an ultrasonic power of 900W, filter with suction, dry in the air, and weigh 7.02g of pretreated bagasse;

[0047] (2) Pour the bagasse pretreated in step (1) into a three-necked flask, then weigh 15g of a...

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Abstract

The invention discloses a bagasses based adsorbent with a high grafting rate, and a preparation method and an application thereof. The preparation method comprises the following steps of (1) pretreatment of the bagasse: smashing and screening the bagasse, boiling 20-30 meshes of bagasse with water, washing the bagasse clean, filtering by suction, immersing with a certain concentration of an alkaline solution, and then carrying out pretreatment on bagasse fibers through steam explosion and surface activation processes; (2) graft modification of the bagasse: carrying out a grafting reaction at a certain temperature by using Mohr's salt / hydrogen peroxide / acetic acid as a compound catalyst; and (3) aftertreatment of modified bagasse: washing a resultant with water, stewing with boiling water, washing with deionized water, filtering by suction and drying. The preparation method provided by the invention is simple, has a high grafting rate, increases the content of grafting functional groups on a bagasse based adsorbent material, and greatly increases an application effect of the bagasse based adsorbent material in the field of heavy metal absorption.

Description

technical field [0001] The invention belongs to the field of functional modification of biomass-based materials, and in particular relates to a bagasse-based adsorbent with high grafting rate and its preparation method and application. Background technique [0002] According to data from the Ministry of Environmental Protection, heavy metal pollution incidents in 2009 resulted in 4,035 people with excessive blood lead and 182 people with excessive cadmium, causing 32 mass incidents. With the rapid development of the economy, a large amount of wastewater pollution has been caused, among which the pollution of mining, metal smelting, chemical factories, electroplating industry, dyes and radioactive wastewater is the most serious. Therefore, how to effectively control heavy metal pollution has become a common concern of mankind. [0003] There are many treatment methods for wastewater containing heavy metal ions, such as chemical precipitation, electrolysis, coagulation, activ...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
Inventor 马年方梁磊李锦荣安玉兴曾建王庆福李昱宫艺丹
Owner GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST)
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