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Attapulgite clay/sodium alginate composite heavy metal absorbent and preparation method thereof

A sodium alginate and adsorbent technology, applied in the field of environmental treatment, can solve the problems of secondary pollution, high operating costs, large investment, etc., and achieve the effects of good adsorption performance and strong binding force

Inactive Publication Date: 2016-09-07
江苏麦阁吸附剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional heavy metal wastewater treatment methods mainly include chemical precipitation method, ion exchange method, membrane separation method, etc. These methods usually have problems such as large investment, high energy consumption, high operating cost, and easy to produce secondary pollution, so their application is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Disperse 10g of attapulgite in 100mL of toluene, ultrasonically disperse for 30min, add 10g of γ-aminopropyltriethoxysilane dropwise under stirring conditions, heat to 70°C after the dropwise addition, and react for 10h. Filtrate and dry in vacuum to obtain silane coupling agent modified attapulgite;

[0022] (2) Disperse the modified attapulgite obtained in step (1) in 150 mL of glutaraldehyde solution with a solute mass fraction of 5%, react at 30°C for 3 hours, filter, wash with deionized water several times, and dry in vacuum , to obtain glutaraldehyde-modified attapulgite;

[0023] (3) Sodium alginate is added into the acetic acid solution that the solute mass fraction is 1% and stirred for 3 hours to obtain the acid solution of sodium alginate, wherein the content of sodium alginate is 0.5g / 100ml,

[0024] The attapulgite modified by glutaraldehyde obtained in step (2) is made into the suspension that concentration is 1g / 100ml,

[0025] According to the weig...

Embodiment 2

[0027] (1) Disperse 10g of attapulgite in 200mL of toluene, ultrasonically disperse for 20min, add 10g of γ-aminopropyltrimethoxysilane dropwise under stirring conditions, heat to 80°C after the dropwise addition, react for 8h, and filter after the reaction , vacuum-dried to obtain silane coupling agent-modified attapulgite;

[0028] (2) Disperse the modified attapulgite obtained in step (1) in 100 mL of glutaraldehyde solution with a solute mass fraction of 5%, react at 30°C for 4 hours, filter, wash with deionized water several times, and dry in vacuum , to obtain glutaraldehyde-modified attapulgite;

[0029] (3) Sodium alginate is added into the acetic acid solution that the solute mass fraction is 1% and stirred for 3 hours to obtain the acid solution of sodium alginate, wherein the content of sodium alginate is 1g / 100ml,

[0030] The attapulgite modified with glutaraldehyde obtained in step (2) is made into the suspension that concentration is 1.5g / 100ml,

[0031] Accor...

Embodiment 3

[0033] (1) Disperse 10g of attapulgite in 250mL of toluene, ultrasonically disperse for 20min, under stirring condition, add 10g of N-β-(aminoethyl)-γ-aminopropylmethyldimethoxysilane dropwise, dropwise Afterwards, heat to 90°C, react for 7 hours, filter after the reaction, and dry in vacuum to obtain silane coupling agent-modified attapulgite;

[0034] (2) Disperse the modified attapulgite obtained in step (1) in 200 mL of glutaraldehyde solution with a solute mass fraction of 5%, react at 30°C for 3 hours, filter, wash with deionized water several times, and dry in vacuum , to obtain glutaraldehyde-modified attapulgite;

[0035] (3) Sodium alginate is added into the acetic acid solution that the solute mass fraction is 1% and stirred for 3 hours to obtain the acid solution of sodium alginate, wherein the content of sodium alginate is 1g / 100ml,

[0036] The attapulgite modified by glutaraldehyde obtained in step (2) is made into the suspension that concentration is 1g / 100ml,...

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PUM

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Abstract

The invention relates to the field of environmental governance, in particular to a heavy metal absorbent and a preparation method thereof. The preparation method comprises the following steps: modifying attapulgite clay powder by using an aminosilane coupling agent to obtain attapulgite clay modified by a silane coupling agent; then dispersing the attapulgite clay in a glutaraldehyde solution, and fully stirring to obtain attapulgite clay modified by glutaraldehyde; and dropwise adding an acid solution of sodium alginate in suspension liquid of the attapulgite clay modified by the glutaraldehyde, heating and fully reacting to obtain a sodium alginate grafted and crosslinked attapulgite clay heavy metal absorbing material. By a mode of covalent bonds, the sodium alginate is grafted and crosslinked to the surface of the attapulgite clay, and in a using process, the sodium alginate cannot drop easily.

Description

technical field [0001] The invention relates to the field of environmental treatment, in particular to a heavy metal adsorbent and a preparation method thereof. Background technique [0002] With the development of the global economy and society, environmental pollution is becoming more and more serious. Industrial wastewater, as the main source of environmental pollution, has been a major problem that has plagued countries all over the world for a long time. Heavy metal ions in industrial wastewater have strong carcinogenic, teratogenic, and mutagenic effects, which pose a serious threat to human health and the ecological environment. Therefore, it is very important to strictly control the pollution of heavy metal wastewater. [0003] Traditional heavy metal wastewater treatment methods mainly include chemical precipitation, ion exchange, membrane separation, etc. These methods usually have problems such as large investment, high energy consumption, high operating costs, an...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
CPCB01J20/12B01J20/24C02F1/288
Inventor 万怀新蔡沐芳彭勇刚郑先进
Owner 江苏麦阁吸附剂有限公司
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