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Water heavy metal ion attapulgite adsorbent

A technology of heavy metal ions and attapulgite, which is applied in the direction of adsorbing water/sewage treatment, water pollutants, water/sewage treatment, etc., to achieve the effects of reducing preparation cost, improving adsorption performance and low cost

Inactive Publication Date: 2016-03-30
LANZHOU KUNLUN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the treatment of heavy metal ion wastewater with attapulgite

Method used

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  • Water heavy metal ion attapulgite adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A water heavy metal ion attapulgite adsorbent, comprising the steps of:

[0039] A. Acidification

[0040] Using attapulgite clay as raw material, attapulgite clay, water and sulfuric acid are prepared in parts by weight, 45 parts of attapulgite clay, 35 parts of water, 0.5 part of sulfuric acid with a mass fraction of 98%, and the sulfuric acid with a mass fraction of 98% is diluted in water , diluted with sulfuric acid and sprayed on the attapulgite clay, stirred evenly and stacked for 24 hours;

[0041] B. smash

[0042] Pulverizing the acidified attapulgite clay;

[0043] C. Sieving

[0044] The crushed attapulgite clay is sieved and divided into four specifications of less than 0.1mm, 0.1-0.3mm, 0.3-0.5mm and 0.5-1mm according to the particle size;

[0045] D. Roasting

[0046] Attapulgite clay of four specifications was roasted separately, and after roasting at 450°C for 1 hour, the balls were dehydrated and solidified, then cooled naturally to room temperatu...

Embodiment 2

[0048] A water heavy metal ion attapulgite adsorbent, comprising the steps of:

[0049] A. Acidification

[0050] Using attapulgite clay as raw material, attapulgite clay, water and hydrochloric acid are prepared in parts by weight, 60 parts of attapulgite clay, 40 parts of water, 1 part of hydrochloric acid with a mass fraction of 37%, and the hydrochloric acid with a mass fraction of 37% is diluted in water , diluted with sulfuric acid and sprayed on the attapulgite clay, stirred evenly and stacked for 60 hours;

[0051] B. smash

[0052] Pulverizing the acidified attapulgite clay;

[0053] C. Sieving

[0054] The crushed attapulgite clay is sieved and divided into four specifications of less than 0.1mm, 0.1-0.3mm, 0.3-0.5mm and 0.5-1mm according to the particle size;

[0055] D. Roasting

[0056] Attapulgite clay of four specifications was roasted separately, and after roasting at 550°C for 2 hours, the balls were dehydrated and solidified, then cooled naturally to roo...

Embodiment 3

[0058] A water heavy metal ion attapulgite adsorbent, comprising the steps of:

[0059] A. Acidification

[0060] Using attapulgite clay as raw material, attapulgite clay, water and phosphoric acid are prepared in parts by weight, 65 parts of attapulgite clay, 50 parts of water, 2 parts of phosphoric acid with a mass fraction of 98%, and the phosphoric acid with a mass fraction of 98% is diluted in water , diluted with sulfuric acid and sprayed on the attapulgite clay, stirred evenly and stacked for 72 hours;

[0061] B. smash

[0062] Pulverizing the acidified attapulgite clay;

[0063] C. Sieving

[0064] The crushed attapulgite clay is sieved and divided into four specifications of less than 0.1mm, 0.1-0.3mm, 0.3-0.5mm and 0.5-1mm according to the particle size;

[0065] D. Roasting

[0066] Attapulgite clay of four specifications was roasted separately, and after roasting at 550°C for 2 hours, the balls were dehydrated and solidified, then cooled naturally to room tempe...

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Abstract

The invention relates to a water absorbing material and especially relates to a water heavy metal ion attapulgite adsorbent. According to the invention, after the attapulgite clay is acidized, the attapulgite clay is roasted, so that an attapulgite absorbing material is formed. The roasting curing forming temperature of the attapulgite absorbing material is controlled within 550 DEG C, so that the crystal habit of the attapulgite is undamaged and the physical and chemical properties of the attapulgite are not changed. The attapulgite is a low-cost easily obtained inorganic mineral material and belongs to a hydrous layer-ribbon magnesium silicate mineral. The attapulgite crystal is in a hairy or fiber form, has a shape of long column or needle under an electron microscope, is in white, grey, light green or sandy beige color and is in the fiber form under an atomic force microscope; a plurality of ducts are arranged in the attapulgite; the cross sections of the ducts are about 0.38nm*0.63nm; the specific surface area of the attapulgite is larger; the attapulgite has higher absorbing capacity and is more and more important to wastewater treatment; the modified attapulgite has wider application in wastewater treatment.

Description

technical field [0001] The invention relates to a water body adsorption material, in particular to an attapulgite adsorbent for heavy metal ions in water. Background technique [0002] Water is the material basis for human survival and development, but with the development of industry, the problem of heavy metal pollution has become increasingly serious. The pollutants in water are mainly organic matter and heavy metal ions, and the absolute discharge of heavy metals in wastewater discharge accounts for about 66.33% of the total wastewater discharge. Wastewater containing heavy metal ions mainly comes from wastewater discharged from mining, smelting, electrolysis, electroplating, chemical and other industries and leachate from solid waste landfills. These heavy metals discharged into the environment are difficult to remove once they enter the water or soil, and gradually accumulate through the food chain, eventually leading to disease or even death of organisms. [0003] T...

Claims

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Application Information

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IPC IPC(8): B01J20/12C02F1/28C02F1/62
CPCB01J20/12B01J2220/42B01J2220/4806C02F1/281C02F2101/20
Inventor 陶玲任珺张锋杰李伊娜缑栋栋
Owner LANZHOU KUNLUN ENVIRONMENTAL PROTECTION TECH
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