Preparation method of modified silver type bentonite organic wastewater adsorbent

A technology of organic wastewater and bentonite, applied in chemical instruments and methods, adsorption water/sewage treatment, inorganic chemistry, etc., to achieve long-term adsorption stability, increase surface area, and increase specific surface area

Inactive Publication Date: 2017-10-24
ANHUI GUONENG YISHENG ENVIRONMENTAL PROTECTION SCI & TECH
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  • Application Information

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Problems solved by technology

At present, traditional treatment processes cannot efficiently and effectively treat refractory persistent organic pollutants in sewage, such as organochlorine, organic pesticides, fuels, phenolic comp

Method used

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Embodiment Construction

[0016] A preparation method of modified silver bentonite organic wastewater adsorbent, which is characterized in that it comprises the following steps:

[0017] (1) Add the modifier to deionized water and stir to fully dissolve the modifier solution. At the same time, prepare a certain concentration of silver nitrate solution, mix the two in a certain ratio and ultrasonically disperse to obtain a mixed modifier;

[0018] (2) Activate the bentonite at 120-130°C for 1-2 hours, cool to room temperature, add the mixed modifier of step (1) according to a certain solid-to-liquid ratio, and shake for 5-6 hours at a constant temperature of 85-90°C , Filtered while hot and washed with 95 ℃ deionized water to be halogen-free, dried and ground through a 200 mesh sieve to obtain silver type antibacterial bentonite;

[0019] (3) Stir and mix a certain amount of ionic liquid and deionized water, heat and stir in a water bath at 50°C for 30 minutes, add the silver-type antibacterial bentonite obtai...

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Abstract

The invention discloses a preparation method of a modified silver type bentonite organic wastewater adsorbent. Antibacterial ions (Ag<+>) are added, a modifying agent (cetyl dimethyl benzyl ammonium chloride or cetyl trimethyl ammonium bromide) is added to prepare silver type antibacterial bentonite; the surface tension of colloid is reduced to prevent agglomeration and nucleation, thus the particle size is reduced, the surface area is enlarged, the adsorption amount of antibacterial ions is increased, the using amount of Ag<+> is reduced therefore, the cost is reduced; more Ag<+> ions are loaded, when a same amount of antibacterial ion salt solution is used, the sterilization rate is increased; finally an ionic liquid is used to carry out a modification treatment, the specific surface and hydrophobic property of the adsorbent are obviously enhanced; the adsorbent has a good adsorbing effect on heavy metals, pesticides, and dyes in wastewater, and also has a good sterilization effect; the improvement on hydrophobic property enhances the retention performance of the adsorbent in wastewater; and the adsorbent is stable for a long term.

Description

Technical field [0001] The invention relates to the technical field of wastewater treatment agents, in particular to a method for preparing a modified silver-type bentonite organic wastewater adsorbent. Background technique [0002] Water is the basic material for all living things to survive. With the rapid development of modern industries, the pollution of water resources is becoming more and more serious, and it has become an environmental issue of concern to all countries in the world. At present, traditional treatment processes cannot efficiently and effectively treat the refractory persistent organic pollutants in sewage, such as organic chlorine, organic pesticides, fuels, phenolic compounds, PCBs, polycyclic aromatic hydrocarbons, and environmental interferons. Therefore, there is an urgent need to develop efficient treatment methods for persistent organic pollutants. The adsorption method is a high-efficiency and energy-saving treatment method commonly used in sewage t...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/28B01J20/30C02F1/28C02F1/50
CPCB01J20/0233B01J20/12B01J20/28011B01J20/28057C02F1/281C02F1/50
Inventor 钟华梁明张兵
Owner ANHUI GUONENG YISHENG ENVIRONMENTAL PROTECTION SCI & TECH
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