Two-ion modified biologicalal adsorbent and preparation method thereof

A biosorbent and dual-ion technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of low adsorption capacity and poor treatment effect of heavy metal wastewater, and achieve high treatment efficiency and easy Adjust and improve the effect of adsorption capacity

Inactive Publication Date: 2016-04-20
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an emerging water treatment technology, biosorption is widely used in the research of heavy metal removal, but the untreated biosorbent has low adsorption capacity for heavy metal anions and cations, and has poor treatment effect on actual heavy metal wastewater. Therefore, it is urgent to It is necessary to prepare a modified adsorbent that can efficiently remove heavy metal anions and cations in water at the same time, so as to realize the harmlessness and resource utilization of wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of dual ion modified biosorbent, its preparation method comprises the following steps:

[0022] (1) Carboxylation of biosorbent: bagasse is dried, pulverized, and sieved to obtain bagasse powder; In base formamide, react at 50°C for 5 hours, then successively undergo suction filtration and washing to obtain carboxylated biosorbent (carboxylated bagasse);

[0023] (2) Amination of biosorbents: Add 4.0g of DCC, 7.2g of tetraethylenepentamine and 5.0g of carboxylated bagasse obtained in step (1) into 450mL N, N dimethylformamide, and in a nitrogen atmosphere at 90°C React for 13 hours, and then successively undergo suction filtration and washing to obtain a dual-ion modified biosorbent (dual-ion modified bagasse);

[0024] The adsorption capacity (q e , mmol / g) were 0.8mmol / g and 0.6mmol / g, respectively.

Embodiment 2

[0026] A kind of dual ion modified biosorbent, its preparation method comprises the following steps:

[0027] (1) Carboxylation of biosorbent: dry, grind, and sieve the sycamore leaves to obtain sycamore leaf powder; 5.0g of sycamore leaf powder is added to 300mL N, N that is dissolved with 5.0g ethylenediaminetetraacetic dianhydride In dimethylformamide, react at 60° C. for 4 hours, then successively undergo suction filtration and washing to obtain carboxylated biosorbent (carboxylated sycamore leaves);

[0028] (2) Amination of biosorbent: the carboxylated sycamore leaves of 1.0gDCC, 8.7g polyethyleneimine (molecular weight is 1800) and 5.0g step (1) gained join in 300mLN, N dimethylformamide, in Reaction at 80°C under nitrogen atmosphere for 20 hours, and then successively undergo suction filtration and washing to obtain a double-ion modified biosorbent (dual-ion modified sycamore leaves);

[0029] The adsorption capacities of the dual ion modified sycamore leaves prepared...

Embodiment 3

[0031] A kind of dual ion modified biosorbent, its preparation method comprises the following steps:

[0032] (1) Carboxylation of biosorbent: dry the loofah pulp, grind it, and sieve it to obtain loofah pulp powder; add 5.0 g of loofah pulp powder to 300 mL N, N dimethylformamide dissolved with 45 g of succinic anhydride , reacted at 80°C for 5 hours, and then successively obtained carboxylated biosorbent (carboxylated loofah pulp) through suction filtration and washing;

[0033] (2) Amination of biosorbent: 2.0g of DCC, 24.5g of polyallylamine hydrochloride (molecular weight: 5000) and 5.0g of the carboxylated loofah pulp obtained in step (1) were added to 300mL N, N dimethyl formaldehyde In amide, react at 80°C in a nitrogen atmosphere for 23 hours, and then successively undergo suction filtration and washing to obtain a double ion modified biosorbent (dual ion modified loofah pulp).

[0034] The adsorption capacity of the double ion modified loofah prepared in this exampl...

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Abstract

The invention discloses a two-ion modified biological adsorbent. A preparation method of the two-ion modified biological adsorbent comprises the following steps: (1) carboxylation of a biological adsorbent: modifying the adsorbent by using an anhydrides compound under an anhydrous condition, and grafting a large number of carboxyl groups to the surface of the biological adsorbent; (2) amination of the biological adsorbent: under the effect of an N, N'-dicyclohexylcarbodiimide (DCC) condensing agent, grafting a poly-amino compound on the surface of the biological adsorbent after carboxylation through a condensation reaction of amine groups and the carboxyl groups, and controlling the adding amount of DCC and the amine groups to prepare the two-ion modified adsorbent with different ratios of the amine groups to the carboxyl groups. The two-ion modified biological adsorbent is prepared by using the simple method, and heavy metal anions and heavy metal cations in a water body can be effectively adsorbed at the same time, so that the problem that the heavy metal anions and the heavy metal cations in the water body cannot be removed by a single functional group modified adsorbent at the same time is solved, and meanwhile, a new way for removal of the heavy metal anions and the heavy metal cations in waste water at is provided.

Description

technical field [0001] The invention relates to the interdisciplinary fields of chemistry, environmental science, biology and the like, in particular to a preparation method of a dual-ion modified biosorbent. Background technique [0002] The biosorption method has attracted much attention due to its advantages of abundant raw material sources, low processing cost, non-toxicity, no secondary pollution, and easy biodegradation. Biosorption method is to use the chemical structure and composition characteristics of some organisms to absorb chemical pollutants dissolved in water, and to remove pollutants in aqueous solution through solid-liquid two-phase separation. As an emerging water treatment technology, biosorption is widely used in the research of heavy metal removal, but the untreated biosorbent has low adsorption capacity for heavy metal anions and cations, and has poor treatment effect on actual heavy metal wastewater. Therefore, it is urgent to It is necessary to prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
CPCB01J20/24B01J2220/485B01J2220/4875C02F1/286C02F2101/20
Inventor 池汝安余军霞朱菁熊万利张越非周芳徐源来徐志高肖春桥王志杰
Owner WUHAN INSTITUTE OF TECHNOLOGY
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