Use of mercapto-functional silicon dioxide hollow microsphere as mercury ion adsorbing agent

A silica and thiol functional technology, applied in the direction of adsorption of water/sewage treatment, inorganic chemistry, silicon compounds, etc., can solve the problems of destroying enzymes and re-synthesis of other protein functions, and achieve superior adsorption performance and large adsorption capacity.

Inactive Publication Date: 2008-11-05
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The toxicity of mercury and its compounds is mainly due to their high affinity for sulfur-containing compounds, so after entering the org

Method used

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  • Use of mercapto-functional silicon dioxide hollow microsphere as mercury ion adsorbing agent
  • Use of mercapto-functional silicon dioxide hollow microsphere as mercury ion adsorbing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 0.2g of thiol-functionalized silica hollow microsphere suspension with a shell thickness of 20nm and uniformly disperse it by ultrasonic, add it to a 100ml conical flask, pipette 20.00ml of mercury standard stock solution, add into a Erlenmeyer flask, ultrasonically dispersed and shaken, and set aside. At 24 hours after mixing, suction filtration was performed, and then the filtrate was collected to measure the concentration of mercury ions. The Hg in the diluted filtrate was measured by the Italian DMA-80 mercury measuring instrument 2+ Through calculation, the adsorption capacity of mercapto-functionalized silica hollow microspheres to mercury ions is 2558.7 mg / g.

Embodiment 2

[0023] The adsorption time was 4 hours, and the remaining conditions were the same as in Example 1, and the Italian DMA-80 mercury measuring instrument was used to measure Hg in the diluted filtrate clear liquid. 2+ The concentration of mercapto-functionalized silica hollow microspheres was calculated, and the measured adsorption amount of mercury ions was 1738.7 mg / g.

Embodiment 3

[0025] Take 0.2g of thiol-functionalized silica hollow microsphere suspension with a shell thickness of 10nm and uniformly disperse it by ultrasonic, add it to a 100ml conical flask, pipette 20.00ml of mercury standard stock solution, add into a Erlenmeyer flask, ultrasonically dispersed and shaken, and set aside. At 24 hours after mixing, suction filtration was performed, and then the filtrate was collected to measure the concentration of mercury ions. The Hg in the diluted filtrate was measured by the Italian DMA-80 mercury measuring instrument 2+ Through calculation, the adsorption capacity of mercapto-functional silica hollow microspheres to mercury ions is 3477 mg / g.

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Abstract

The invention pertains to the technical field of chemical separation, in particular to an application of taking a sulfhydryl functionalization hollow silica microsphere as a mercury ion adsorbent. The functional hollow silica microsphere can effectively adsorb mercury ions in a solution and the adsorption capacity is far higher than that of other mercury ion adsorbents reported by present literature. The maximum capacity of the adsorbent obtained under the experimental condition is 3477mg/g. Moreover, under the condition of a pH value less than 7, the adsorption ability is not sensitive to acid number. For mercury containing solutions which is carried out adsorption by the adsorbent, the maximum adsorption rate reaches 99.96 percent and the concentration of residual solutions after adsorption is far lower than the discharge standard of China (0.05mg/L). Besides, the adsorbent has excellent regeneration ability.

Description

technical field [0001] The invention belongs to the technical field of chemical separation, and in particular relates to the use of a mercapto-functionalized silica hollow microsphere as a mercury ion adsorbent. Background technique [0002] Mercury ion is one of the highly toxic pollutants in modern industry. Mercury pollutants in water come from the mining and smelting of mercury-containing minerals, and the production and application of various mercury compounds. The mercury-containing production wastewater in metallurgy, chemical industry, chemical pharmacy, instrument manufacturing, electrical, wood processing, papermaking, paint, pigment, textile, leather, explosives and other industries may be the source of mercury pollution in environmental water bodies. In the chlor-alkali industry, the water discharged from the mercury electrode electrolysis section contains a relatively high concentration of mercury. [0003] Gaseous mercury ingested into the human body through ...

Claims

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Application Information

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IPC IPC(8): B01J20/10C02F1/28C02F1/62C02F101/20
Inventor 袁俊杰浦鸿汀常志宏
Owner TONGJI UNIV
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