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Preparation method and application of bagasse mercapto-biosorbent

A technology of biosorbent and bagasse, which is applied in the cross field of environment and materials, can solve the problem of no metal ion adsorption, etc., and achieve the effect of fast adsorption, easy control of conditions, and simple process

Inactive Publication Date: 2013-07-10
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above two patents only have the preparation method of sulfhydryl adsorbent, and there is no description of the adsorption of metal ions

Method used

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  • Preparation method and application of bagasse mercapto-biosorbent

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Embodiment 1

[0022] (1) Bagasse pretreatment: Wash the squeezed bagasse with water to remove soil and impurities, put it in a container and soak it in water for 40 hours, then boil it for 30 minutes, wash it with deionized water for 3 times, dry it in vacuum and crush it with 40 mesh Sieve through a sieve to obtain pretreated bagasse;

[0023] (2) Bagasse alkalization treatment: Soak the pretreated bagasse in 10% NaOH aqueous solution for 20 hours, boil for 1 hour, wash with deionized water after cooling until neutral, filter with suction, and dry to obtain Alkalized bagasse;

[0024] (3) Preparation of mercapto-bagasse biosorbent: In a stoppered Erlenmeyer flask, add 22 mL of thioglycolic acid and 13 mL of tetrahydrofuran, add 4 drops of concentrated sulfuric acid, mix well, add 8 g of alkalized bagasse, seal and react at room temperature for 2 h, then Add 10mL of 50% sodium sulfide aqueous solution, stopper, and react at 45°C for 50 h, then wash with deionized water, filter with suction...

Embodiment 2

[0026] (1) Bagasse pretreatment: Wash the squeezed bagasse with water to remove soil and impurities, put it in a container for 30 hours, boil it for 40 minutes, wash it with deionized water for 3 times, dry it in vacuum and crush it with 40 mesh Sieve through a sieve to obtain pretreated bagasse;

[0027](2) Bagasse alkalization treatment: Soak pretreated bagasse in 5% NaOH aqueous solution for 24 hours, boil for 0.5 hours, wash with deionized water to neutral after cooling, and dry after suction filtration. Obtain alkalized bagasse;

[0028] (3) Preparation of mercapto-bagasse biosorbent: In a stoppered Erlenmeyer flask, add 50mL of thioglycolic acid and 25mL of tetrahydrofuran, add 6 drops of concentrated sulfuric acid, mix well, add 25g of alkalized bagasse, seal at room temperature and react for 3 hours, then Add 30mL of 50% sodium sulfide aqueous solution, stopper, and react at 40°C for 60 h, then wash with deionized water, filter with suction until the filtrate is neutr...

Embodiment 3

[0030] (1) Bagasse pretreatment: Wash the squeezed bagasse with water to remove soil and impurities, put it in a container for 48 hours, boil it for 50 minutes, wash it with deionized water for 3 times, dry it in vacuum and crush it with 40 mesh Sieve through a sieve to obtain pretreated bagasse;

[0031] (2) Bagasse alkalization treatment: Soak pretreated bagasse in 12% NaOH aqueous solution for 28 hours, boil for 0.5 hours, wash with deionized water to neutral after cooling, filter with suction, and dry. Obtain alkalized bagasse;

[0032] (3) Preparation of mercapto-bagasse biosorbent: In a stoppered Erlenmeyer flask, add 20 mL of thioglycolic acid and 10 mL of tetrahydrofuran, add 2 drops of concentrated sulfuric acid, mix well, add 10 g of alkalized bagasse, seal at room temperature and react for 2 h, then Add 15mL of 50% sodium sulfide aqueous solution, stopper, and react at 45°C for 55 hours, then wash with deionized water, filter with suction until the filtrate is neut...

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Abstract

The invention discloses a preparation method and an application technology of a bagasse mercapto-biosorbent. The preparation method is characterized by comprising the following steps of: adding 35-45wt% of mercaptoacetic acid, 18-25wt% of tetrahydrofuran, 12-22wt% of alkalized bagasse and 0.15-1.0wt% of concentrated sulphuric acid in a triangular flask with a plug, performing a sealed room-temperature reaction for 2-4 hours, and adding 8-18wt% of sodium sulphide and 8-18wt% of water, wherein the sum of the percentages of all the components is 100%; plugging, and performing a static reaction for 48-60 hours at 40-45 DEG C; and then washing with deionized water, performing suction filtration until the filtrate is neutral, washing by a small amount of ethanol, placing in an oven at 55-65 DEG C and drying, so as to obtain the bagasse mercapto-biosorbent, wherein the bagasse mercapto-biosorbent is high in adsorption capacity for Cd2, Pb<2+> and Hg<2+>, fast in adsorption speed, good in physicochemical stability and mechanical stability, strong in regeneration capacity, high in repeated use times, low in cost, and capable of utilizing agricultural waste.

Description

technical field [0001] The present invention relates to the reuse of agricultural waste, the preparation method of biosorbent and the application technology of heavy metal waste water treatment, belongs to the intersection field of environment and materials, and particularly relates to a preparation method of mercapto bagasse biosorbent and its application in water treatment technology. [0002] Background technique [0003] With the rapid development of my country's industry, a large amount of waste water containing heavy metal ions is produced and discharged, and the content of heavy metal ions in soil and water sources increases. Heavy metals will enter organisms through food chains and other channels. Sexual pollution, causing serious harm to the ecological environment and human health, is difficult to control. At present, heavy metal pollution in water has become one of the most serious environmental pollution in the world today. Therefore, effective prevention and co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
Inventor 李慧芝许崇娟魏琴
Owner UNIV OF JINAN
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