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Preparation of organic modified nano silicon oxide adsorbing material

A nano-silica, adsorption material technology, applied in chemical instruments and methods, inorganic chemistry, adsorbed water/sewage treatment and other directions, can solve the problems affecting product application performance, organic pollutants have no adsorption and removal ability, etc., to achieve improved sedimentation performance , The distribution effect is enhanced, and the effect of effective adsorption and removal

Inactive Publication Date: 2008-10-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But due to SiO 2 The silanol groups and adsorbed water on the surface make it hydrophilic, so it has almost no ability to adsorb and remove organic pollutants in water, and also affects other application properties of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In the 1000ml iodine measuring bottle, add the cetylpyridinium chloride (CPC) cationic surfactant solution of 5g nano silicon oxide material and 500ml, the cetylpyridinium chloride add-on is 5g (surfactant solution quality 100%) concentration of 1.0%), stirred and oscillated at a constant temperature of 80°C for 2h, the product was filtered, washed twice with distilled water, dried at 90°C, activated at 105°C for 30min, ground and passed through 100 mesh sieve to prepare CPC organically modified nano-silica adsorption material. The p-nitrophenol adsorption capacity of the material is greater than 200 mg / g, and when the dosage is 1 / 40, the removal efficiency of p-nitrophenol wastewater with a concentration of 100 mg / L is greater than 99.2%. When the dosage is 1 / 100, the removal efficiency of naphthalene in waste water is greater than 80%.

Embodiment 2

[0023] In the 1000ml iodine measuring bottle, add the octadecylpyridinium chloride cationic surfactant solution of 20g nano silicon oxide material and 100ml, the octadecylpyridinium chloride add-on is 20g (surfactant solution mass percent concentration is 20%), stirred and oscillated at a constant temperature of 20°C for 24h, the product was filtered, washed twice with distilled water, dried at 50°C, activated at 105°C for 1h, ground, and passed through a 100-mesh sieve to produce A CPC organically modified nano-silicon oxide adsorption material was obtained. The adsorption capacity of the material for p-nitrophenol is greater than 200mg / g, and when the dosage is 1 / 40, the removal efficiency for p-nitrophenol wastewater with a concentration of 100mg / L is greater than 99.5%. When the dosage is 1 / 100, the removal efficiency of naphthalene in waste water is greater than 85%.

Embodiment 3

[0025] In the 1000ml iodine flask, add the cetyltrimethylammonium bromide (CTMAB) cationic surfactant solution of 10g nano silicon oxide material and 100ml, the CTMAB addition is 5g (surfactant solution mass percent concentration is 5%), stirred and oscillated at a constant temperature of 35°C for 3h, the product was filtered, washed twice with distilled water, dried at 80°C, activated at 105°C for 5h, ground, and passed through a 100-mesh sieve to produce The CTMAB organically modified nano-silica adsorption material was obtained. The p-nitrophenol adsorption capacity of the material is greater than 150 mg / g, and when the dosage is 1 / 40, the removal efficiency of the p-nitrophenol wastewater with a concentration of 100 mg / L is greater than 98.5%. When the dosage is 1 / 100, the removal efficiency of naphthalene in waste water is greater than 75%.

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Abstract

The invention discloses a preparation method for organic nano-silicon oxide adsorption material, which consists of the following steps: 1) a cation surface active agent is dissolved into water to prepare surface active agent solution, then the nano-silicon oxide is poured into the surface active agent solution; the surface active agent solution comprises the cation surface active agent, wherein, the mass percent of the cation surface active agent is 1-20 percent, the mass ratio between the nano-silicon oxide and the surface active agent solution is 1:5-1:100; 2) the mixing solution is stirred at a constant temperature of 20-80 DEG C for 2-24 hours and then is filtrated and washed by distilled water twice; 3) filtrated solid is dried at the temperature of 50-90 DEG C and is activated at the temperature of 105 DEG C for 30 minutes to 5 hours; 4) dried active product is grinded and passes 100 mesh sieve to prepare organic modification nano-silicon oxide adsorption material. The organic modification nano-silicon oxide adsorption material prepared by the invention increases hydrophobic nature, the content of organic carbon and settlement property in water, greatly improves the adsorption ability of organic contamination in water and can be popularized and used in organic wastewater treatment and waste landfill anti-seepage additive materials, etc.

Description

technical field [0001] The invention relates to the field of environmental nanometer materials, in particular to a method for preparing an organically modified nano silicon oxide adsorption material. Background technique [0002] my country's water resources are short, and water pollution is becoming more and more serious. In 2005, the total discharge of wastewater in the country reached 52.45 billion tons, including 24.31 billion tons of industrial wastewater and 28.14 billion tons of domestic sewage. A large amount of sewage discharge leads to water pollution, especially serious pollution of refractory organic matter. The Bulletin on the State of the Environment in China promulgated in recent years shows that among the seven major water systems in my country, only about 30% of the sections satisfy the Class III standard for surface water, while 40% of the sections with inferior Class V water almost lose their water functions. At the same time, due to the lag of industria...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/22C02F1/28
Inventor 杨坤景青锋邬文浩苏兰
Owner ZHEJIANG UNIV
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