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EDDS (ethylenediaminedisuccinic acid) modified engineering material and preparation method thereof

An engineering material and modification technology, applied in the field of environmental application materials, can solve the problems of few researches on chelating agent modified engineering materials, and achieve the effect of low cost, good stability and good adsorption performance

Active Publication Date: 2014-02-19
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a large number of existing studies mainly focus on the use of chelating agents to treat metal ions, and there is little research on the use of chelating agents to modify engineering materials

Method used

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  • EDDS (ethylenediaminedisuccinic acid) modified engineering material and preparation method thereof
  • EDDS (ethylenediaminedisuccinic acid) modified engineering material and preparation method thereof
  • EDDS (ethylenediaminedisuccinic acid) modified engineering material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 Utilizes the method of direct immersion to carry out modification to engineering material

[0025] Take 5 small beakers, add 1750g water and 200g engineering materials respectively (in the small beakers numbered a1 to a5 are activated carbon, activated carbon fiber, anion exchange resin, molecular sieve, fiber), then add 10g EDDS respectively, stir well, and use electric furnace After heating and boiling for 1 hour, place it at room temperature for 8 hours; then wash it thoroughly with deionized water; and finally dry it at 105°C to obtain samples A1-A5.

[0026] Take 2 small beakers, add 11000g of water and 100g of engineering materials respectively (the small beakers with numbers a6 to a7 are silica gel, active Al 2 o 3 ), then add 10g of EDDS respectively, stir well, heat and boil in an electric furnace for 3 hours, and then place it at room temperature for 16 hours; then fully wash with deionized water; and finally dry at 105°C to obtain samples A6-A7....

Embodiment 2

[0044] Embodiment 2 Utilizes the method for adding binder to modify engineering material

[0045]Take 5 small beakers, add 1750g water and 200g engineering materials respectively (in the small beakers numbered b1 to b5 are activated carbon, activated carbon fiber, anion exchange resin, molecular sieve, fiber), and then add 10g EDDS and 10g binder respectively, Stir well, heat and boil in an electric furnace for 1 hour, and then place it at room temperature for 8 hours; then wash it thoroughly with deionized water; and finally dry it at 105°C to obtain samples B1-B5.

[0046] Take 2 small beakers, add 11000g water and 100g engineering materials respectively (in the small beakers numbered b6 to b7 are silica gel, active Al 2 o 3 ), then add 10g of EDDS and 15g of binder respectively, stir well, heat and boil in an electric furnace for 3 hours, and then place it at room temperature for 16 hours; then fully wash it with deionized water; and finally dry it at 105°C to obtain sampl...

Embodiment 3

[0056] Embodiment 3 Utilizes the method for mixed reaction to modify engineering materials

[0057] A group of parallel experiments (c1-c5) were set up, and the following steps were taken respectively: add fumaric acid containing 0.2 mol of fumaric acid at a concentration of 25% fumaric acid aqueous solution, heated to 85°C, slowly dropwise add sodium hydroxide aqueous solution containing 0.5mol of sodium hydroxide with a concentration of 30% by weight under stirring condition for 18h; The weight percent concentration of diamine 6g is 20% ethylenediamine aqueous solution, heat preservation reaction for 24h, add 45g engineering materials (numbers c1 to c5 are activated carbon, activated carbon fiber, anion exchange resin, molecular sieve, fiber) heat preservation reaction for 18h, cool to At room temperature, slowly add hydrochloric acid solution dropwise under stirring conditions (the mass percentage concentration of the added hydrochloric acid solution is 25%, 27%, 30%, 33%, ...

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Abstract

The invention provides an EDDS (ethylenediaminedisuccinic acid) modified engineering material. The EDDS modified engineering material is prepared by adopting a modifier EDDS and an adsorbent engineering material through physical bonding and chemical bonding. The invention also provides a preparation method of the EDDS modified engineering material. The EDDS modified engineering material is simple in preparation technology and low in cost. The EDDS modified engineering material is modified by using a biodegradable chelating agent EDDS. The obtained EDDS modified engineering material has good stability on the one hand and good metal ion adsorption property on the other hand.

Description

technical field [0001] The invention belongs to the field of environmental application materials, in particular to an EDDS modified engineering material, and also relates to a preparation method of the EDDS modified engineering material. Background technique [0002] Chelating agents play an irreplaceable role in the control of environmental pollution. Since the chelating agent can strongly react with various heavy metal ions to form relatively stable rings, such as Cu, Pb, Zn and Cd, etc., it can extract heavy metal ions from the solution or soil, thereby Can control some environmental pollution problems. Therefore, whether it is the treatment of industrial heavy metal ion wastewater or the restoration of contaminated soil, it is not difficult to find complexing agents. There are many kinds of chelating agents, artificially synthesized, such as EDTA, DTPA and EGTA, etc.; naturally formed, such as NTA, EDDS (can be produced by natural microorganisms Amycolatopsis japonicum...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/26B01J20/30
Inventor 祝建中丁莹曹阳陈建标陈胜鲁
Owner HOHAI UNIV
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