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Method using attapulgite to prepare particles for removing phosphor from water

A technology of attapulgite and attapulgite, applied in chemical instruments and methods, water/sewage treatment, adsorption water/sewage treatment, etc., can solve problems such as inability to drink, achieve the effect of improving adsorption capacity and enhancing adsorption capacity

Inactive Publication Date: 2016-09-14
安徽金联地矿科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, almost all lakes in my country are in a state of "eutrophication". The phosphorus content of Taihu Lake increased from 0.02 mg / L in 1981 to 0.13 mg / L in 1995, with an average annual increase of 0.008 mg / L, exceeding the standard by 20 times; Chaohu Lake , the phosphorus content exceeds the standard by 3.4 times; Yunnan Dianchi Lake, due to the uncontrolled discharge of phosphorus, the lake water exceeds the national level 5 surface water quality standard and is undrinkable

Method used

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  • Method using attapulgite to prepare particles for removing phosphor from water
  • Method using attapulgite to prepare particles for removing phosphor from water
  • Method using attapulgite to prepare particles for removing phosphor from water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1), the attapulgite is crushed to a particle size of 1.05mm to obtain attapulgite particles;

[0021] (2), adding concentrated hydrochloric acid with a concentration of 37% in distilled water is configured into a 5mol / L hydrochloric acid solution, adding the attapulgite particles in the step (1) to acidify the hydrochloric acid solution, the solid-to-liquid ratio is 1:1, mechanically stirring for 6h, The stirring speed is 200r / min to prepare acidified attapulgite particles;

[0022] (3), the acidified attapulgite particles in step (2) were washed 5 times with deionized water, and washed with 1mol / LAgNO 3 The solution was tested for residual Cl ions, and the washed attapulgite particles were vacuum-filtered and placed in an oven at 105°C for 2 hours to obtain dried attapulgite particles;

[0023] (4), cetyltrimethylammonium bromide is added in distilled water to be configured as a cationic surfactant of 1mol / L, and the pH is adjusted to 8.5 with 1mol / L NaoH. The obtai...

Embodiment 2

[0031] (1), the attapulgite is crushed to a particle size of 1.75mm to obtain attapulgite particles;

[0032] (2), adding concentrated hydrochloric acid with a concentration of 37% in distilled water is configured into a 5mol / L hydrochloric acid solution, adding the attapulgite particles in the step (1) to acidify the hydrochloric acid solution, the solid-to-liquid ratio is 1:1, mechanically stirring for 4 hours, The stirring speed is 220r / min to prepare acidified attapulgite particles;

[0033] (3), the acidified attapulgite particles in step (2) were washed 3 times with deionized water, and washed with 1mol / LAgNO 3 The solution was tested for residual Cl ions, and the washed attapulgite particles were vacuum-filtered and placed in an oven at 105°C for 4 hours to obtain dried attapulgite particles;

[0034] (4), cetyltrimethylammonium bromide is added in distilled water to be configured as a cationic surfactant of 0.25mol / L, and the pH is adjusted to 8.5 with 1mol / L NaoH. Un...

Embodiment 3

[0042] (1), the attapulgite is crushed to a particle size of 1.5mm to obtain attapulgite particles;

[0043] (2), adding concentrated hydrochloric acid with a concentration of 37% in distilled water to configure a 5mol / L hydrochloric acid solution, adding the attapulgite particles in the step (1) to acidify the hydrochloric acid solution, the solid-to-liquid ratio is 1:1, mechanically stirring for 5h, The stirring speed is 210r / min to prepare acidified attapulgite particles;

[0044] (3), the acidified attapulgite particles in step (2) were washed 4 times with deionized water, and washed with 1mol / LAgNO 3The solution was tested for residual Cl ions, and the washed attapulgite particles were vacuum-filtered and placed in an oven at 105°C for 3 hours to obtain dried attapulgite particles;

[0045] (4), cetyltrimethylammonium bromide is added in distilled water and is configured into a cationic surfactant of 0.6mol / L, and the pH is adjusted to 8.5 with 1mol / L NaoH, and under the...

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Abstract

The invention discloses a method using attapulgite to prepare particles for removing phosphor from water. The method comprises the following steps: grinding attapulgite into particles with a particle size of 1.05 to 1.75 mm, adding the particles into a hydrochloric acid solution to carry out acidification, and finally modifying the activated attapulgite particles by cetyl trimethyl ammonium bromide and n-octyl triethoxysilane. The provided method has the advantages that the specific surface area of attapulgite crystals is increased by the acidification treatment, thus the adsorption performance is effectively improved; by adding a cation surfactant into attapulgite, the performance of attapulgite on adsorbing organic pollutants is enhanced; the hydrophilic property of attapulgite surface is changed to hydrophobic property after organically modified attapulgite is modified by a silane coupling agent, and at the same time, the particle size of attapulgite particles is controlled to prevent attapulgite particles from floating on the water.

Description

technical field [0001] The invention belongs to the field of water body pollution control, in particular to a method for preparing water body phosphorus removal particles by using attapulgite. Background technique [0002] According to a survey of 55,500 kilometers of river sections across the country, 47,700 kilometers are unsuitable for drinking and fishery water, accounting for 85.9%. Scientific experiments have shown that adding 1 gram of phosphorus into water can cause 100 grams of blue-green algae to grow in the water. At present, almost all lakes in my country are in a state of "eutrophication". The phosphorus content of Taihu Lake increased from 0.02 mg / L in 1981 to 0.13 mg / L in 1995, with an average annual increase of 0.008 mg / L, exceeding the standard by 20 times; Chaohu Lake , the phosphorus content exceeds the standard by 3.4 times; Yunnan Dianchi Lake, due to the uncontrolled discharge of phosphorus, the lake water exceeds the national level 5 surface water qual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/32B01J20/22C02F1/28C02F1/58
CPCB01J20/12B01J20/22B01J20/3285B01J2220/4806B01J2220/4812C02F1/281C02F1/285
Inventor 秦月琴任飞孙忠伟明桂林吴海东王前张传琦牛杏杏王赞王代飞
Owner 安徽金联地矿科技有限公司
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