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Particulate attapulgite adsorbent and preparation method thereof

A technology of granular attapulgite and attapulgite, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, and can solve the problems of increasing the adsorption performance of organic pollution, easy dissolution of surfactants, secondary pollution, etc. problems, to achieve the effect of easy settlement, cheap raw materials, and low cost

Inactive Publication Date: 2014-09-03
WUHAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the modification method of solid materials is mainly to modify the surface with surfactants to change the surface electrical properties, thereby changing its adsorption performance, but surfactants are easy to dissolve in water and cause secondary pollution.
Huang Jianhua and others studied the modification of attapulgite with octadecyltrimethylammonium chloride to improve the hydrophobicity of attapulgite, thereby increasing the adsorption performance of organic pollution (Huang Jianhua, Wang Xingguo, Jin Qingzhe et al., Ultrasonic modification OTMAC-attapulgite adsorbs phenol, Water Treatment Technology, 2005, 31 (9), 61-64), but the preparation process of OTMAC-attapulgite adsorbent is accompanied by organic pollution, and the prepared adsorbent is powder, which is Difficult to recycle after

Method used

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  • Particulate attapulgite adsorbent and preparation method thereof
  • Particulate attapulgite adsorbent and preparation method thereof

Examples

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Effect test

Embodiment 1

[0022] A granular attapulgite adsorbent and a preparation method thereof. The concrete steps of its preparation method are:

[0023] Step 1, mixing water and attapulgite powder evenly, the mass ratio of water and attapulgite powder is 1: 0.5~0.7, to obtain muddy attapulgite;

[0024] Step 2, drying the prepared mud-like attapulgite at 90-100° C. for 12-16 hours, and breaking it into granular attapulgite with a particle size of 0.45-1.25 mm;

[0025] Step 3, then place the prepared granular attapulgite in a muffle furnace, and calcinate at 650-700° C. for 2.5-3 hours to prepare the granular attapulgite adsorbent.

[0026] It is 20mg / L containing Pb with the attapulgite adsorbent that the present embodiment 1 makes to concentration 2+ The wastewater is subjected to adsorption treatment. Under the conditions that the dosage of the granular attapulgite adsorbent is 1g / L, the stirring speed of 250r / min and the adsorption time are 2h, the Pb-containing 2+ Pb in wastewater 2+ The...

Embodiment 2

[0028] A granular attapulgite adsorbent and a preparation method thereof. The concrete steps of its preparation method are:

[0029] Step 1, mixing water and attapulgite powder evenly, the mass ratio of water and attapulgite powder is 1:0.6~0.8, to obtain muddy attapulgite;

[0030] Step 2, drying the prepared mud-like attapulgite at 90-100° C. for 12-16 hours, and breaking it into granular attapulgite with a particle size of 0.45-1.25 mm;

[0031] Step 3, then place the prepared granular attapulgite in a muffle furnace, and calcinate at 650-700° C. for 2.5-3 hours to prepare the granular attapulgite adsorbent.

[0032] With the attapulgite adsorbent prepared in this embodiment 2, the concentration is 20mg / L containing Cu 2+ The wastewater is subjected to adsorption treatment. Under the conditions that the dosage of the granular attapulgite adsorbent is 1g / L, the stirring speed of 250r / min and the adsorption time are 2h, the Cu-containing 2+ Cu in wastewater 2+ The removal...

Embodiment 3

[0034] A granular attapulgite adsorbent and a preparation method thereof. The concrete steps of its preparation method are:

[0035] Step 1, mixing water and attapulgite powder evenly, the mass ratio of water and attapulgite powder is 1: 0.7~0.9, to obtain muddy attapulgite;

[0036] Step 2, drying the prepared mud-like attapulgite at 100-110° C. for 8-12 hours, and breaking it into granular attapulgite with a particle size of 0.45-1.25 mm;

[0037] Step 3, then place the prepared granular attapulgite in a muffle furnace, and calcinate at 700-750° C. for 2-2.5 hours to prepare the granular attapulgite adsorbent.

[0038] With the attapulgite adsorbent prepared in this embodiment 3, the concentration is 20mg / L containing Cd 2+ The wastewater is subjected to adsorption treatment. Under the conditions that the dosage of the granular attapulgite adsorbent is 1g / L, the stirring speed of 250r / min and the adsorption time are 2h, the Cd-containing 2+ Cd in wastewater 2+ The remova...

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Abstract

The invention relates to a particulate attapulgite adsorbent and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: uniformly mixing water and attapulgite powder to obtain mud attapulgite, wherein are in the mass ratio of the water to the attapulgite powder is 1 to (0.5-1); drying the prepared mud attapulgite for 8 to 16 hours at 90 to 110 DEG C; crushing dried mud attapulgite to the particulate attapulgite with the particle size being 0.045 to 1.25 mm; calcining the prepared particulate attapulgite for 2 to 3 hours at 650 to 750 DEG C in a Muffle furnace to prepare the particulate attapulgite adsorbent. According to the particulate attapulgite adsorbent and the preparation method thereof, the process is simple; secondary pollution is avoided; the prepared particulate attapulgite adsorbent has the characteristics of large particle, easiness in sedimentation, easiness in recycling and high adsorption performance, and is applicable to industrial heavy metal cationic wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of adsorbents. In particular, it relates to a granular attapulgite adsorbent and a preparation method thereof. Background technique [0002] Heavy metal ion wastewater is one of the three major water pollution methods in the world today. These heavy metal ion wastewater cannot be biodegraded after entering the environment. If they accumulate to a certain limit in the water body, they will cause serious harm to the water body-aquatic plant-aquatic animal system, and It can affect the health of human beings through the food chain. The current heavy metal treatment methods mainly include chemical precipitation, solvent extraction, ion exchange, membrane separation, activated carbon and silica gel adsorption, etc. Among them, the chemical precipitation method is the most widely used, but for low-concentration wastewater, the chemical precipitation method has large investment and operation. High cost and easy t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F101/20
Inventor 刘红杨恩阮霞范先媛
Owner WUHAN UNIV OF SCI & TECH
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