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Multifunctional biological adsorbent and preparation method thereof

A biological adsorption and multi-functional technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of difficult recovery, slow separation rate, low recycling rate, etc., to improve the adsorption capacity, Stable physical and chemical properties and high processing efficiency

Active Publication Date: 2016-07-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this kind of biosorbent and similar heavy metal adsorption materials are mainly separated by sedimentation and separation after adsorbing heavy metal ions, which has the disadvantages of slow separation rate, poor separation effect, difficult recovery and low recycling rate.
Moreover, the growth and reproduction of the bacteria mentioned in the patent is greatly affected by the habitat environment, and cannot adapt to the complex pollution status of the external actual environment, resulting in a weak ability to remove heavy metals, so that the actual adsorption effect of the entire biosorbent is large. discount

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  • Multifunctional biological adsorbent and preparation method thereof
  • Multifunctional biological adsorbent and preparation method thereof
  • Multifunctional biological adsorbent and preparation method thereof

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Effect test

Embodiment 1

[0038] A kind of multifunctional biosorbent material of the present invention, its preparation method comprises the following steps (as figure 2 shown):

[0039] (1) Preparation of α-ketoglutarate chitosan (KCTS): Weigh 4.500g of chitosan dry sample, fully swell with 120mL distilled water for more than 24h, weigh m(α-ketoglutarate):m( Chitosan)=1.6:1.0 alpha-ketoglutaric acid 7.200g, join in the sufficient swelling system of chitosan at room temperature, stir 1h, promptly obtain slightly yellow transparent viscous solution; With 0.1mol / Slowly adjust the pH of the filtrate system to 4.5-5.5 (preferably 5.0) with 1 L of sodium hydroxide solution to obtain a milky white viscous solution, then transfer it to a 500mL three-necked flask and continue to stir evenly. Control the reaction time to 4h; according to the molar number of n(sodium borohydride):n(α-ketoglutaric acid)=1.8:1.0, accurately weigh 3.360g of sodium borohydride, and prepare it into 30mL of NaBH 4 Solution, slowl...

Embodiment 2

[0053] A kind of multifunctional biosorbent material of the present invention, its preparation method comprises the following steps:

[0054] (1) Preparation of α-ketoglutarate chitosan (KCTS): Weigh 4.500g of chitosan dry sample, fully swell with 120mL distilled water for more than 24h, weigh m(α-ketoglutarate):m( Chitosan)=1.6:1.0 alpha-ketoglutaric acid 7.200g, join in the sufficient swelling system of chitosan at room temperature, stir 1h, promptly obtain slightly yellow transparent viscous solution; With 0.1mol / Slowly adjust the pH of the filtrate system to 4.5-5.5 (preferably 5.0) with 1 L of sodium hydroxide solution to obtain a milky white viscous solution, then transfer it to a 500mL three-necked flask and continue to stir evenly. Control the reaction time to 4h; according to the molar number of n(sodium borohydride):n(α-ketoglutaric acid)=1.8:1.0, accurately weigh 3.360g of sodium borohydride, and prepare it into 30mL of NaBH 4 Solution, slowly add dropwise to the ...

Embodiment 3

[0064] A kind of multifunctional biosorbent material of the present invention, its preparation method comprises the following steps:

[0065] (1) Preparation of α-ketoglutarate chitosan (KCTS): Weigh 4.500g of chitosan dry sample, fully swell with 120mL distilled water for more than 24h, weigh m(α-ketoglutarate):m( Chitosan)=1.6:1.0 alpha-ketoglutaric acid 7.200g, join in the sufficient swelling system of chitosan at room temperature, stir 1h, promptly obtain slightly yellow transparent viscous solution; With 0.1mol / Slowly adjust the pH of the filtrate system to 4.5-5.5 (preferably 5.0) with 1 L of sodium hydroxide solution to obtain a milky white viscous solution, then transfer it to a 500mL three-necked flask and continue to stir evenly. Control the reaction time to 4h; according to the molar number of n(sodium borohydride):n(α-ketoglutaric acid)=1.8:1.0, accurately weigh 3.360g of sodium borohydride, and prepare it into 30mL of NaBH 4 Solution, slowly add dropwise to the ...

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Abstract

The invention provides a multifunctional biological adsorbent, and a preparation method thereof comprises the following steps: chitosan alpha-ketoglutaric acid is taken as a carrier, a heavy metal ion is taken as an imprinted template, an ionic imprinting material is obtained through the ionic imprinting technique, then the ionic imprinting material and magnetic nano-Fe3O4 are subjected to cross-linking reaction, a magnetic ionic imprinting material is obtained, and finally the surface of a Serratia marcescens thallus is coated with the magnetic ionic imprinting material through curing reaction. The obtained biological adsorbent integrates advantages of high adsorption with low cost, high selectivity with low pollution, high separating efficiency with low loss, and the like, also has advantages of magnetic materials and biological adsorbents, and can realize various functions such as magnetic separation, selective recognition, circulative recovery and the like; moreover, the method is simple, the cost is low, and the biological adsorbent is green and environment-friendly, avoids secondary pollution, and can be widely used for treatment of various specific heavy metal industrial wastewater, therefore, a novel material is provided for treatment of industrial wastewater.

Description

technical field [0001] The invention belongs to the field of adsorption materials, in particular to a multifunctional biological adsorption material and a preparation method thereof. Background technique [0002] Heavy metal pollution is one of the three major water pollution methods in the world, mainly including lead, chromium, mercury, zinc, copper, nickel and other heavy metal pollution. When heavy metals enter the water environment, they cannot be degraded by organisms, but also accumulate in organisms and accumulate in the food chain. After entering the human body, they will damage the normal metabolic activities of the human body and cause harm to people's health. Traditional heavy metal wastewater treatment methods mainly include chemical, physical or physicochemical methods. However, the traditional chemical and physical chemical treatment methods have many disadvantages, such as: large investment, troublesome operation and management, high operating cost, and easy...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30B01J20/28C02F1/28C02F1/62
CPCB01J20/06B01J20/24B01J20/28009B01J2220/46B01J2220/4806B01J2220/4825B01J2220/4868C02F1/281C02F1/286C02F1/288C02F2101/20
Inventor 丁萍杨飞肖稳李晶黄瑞雪陈翠梅
Owner CENT SOUTH UNIV
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