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A kind of hydrotalcite-plant cellulose composite pellet and its preparation method and application

A plant cellulose and hydrotalcite technology, applied in chemical instruments and methods, other chemical processes, adsorption water/sewage treatment, etc., can solve problems such as complicated process, difficult recycling work, large engineering, etc., and achieve simple preparation process, Conducive to the effect of recycling and easy experimental operation

Active Publication Date: 2020-04-17
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The cellulose adsorbent is in powder form, and it is difficult to carry out subsequent recovery work in practical applications
In addition, for the current removal of plastics below the micron level, membrane bioreactors can be used to treat the primary effluent and different tertiary treatment technologies (reverse filtration, rapid sand filtration and dissolved air flotation) to treat the secondary effluent. The project is large and the process is complicated.

Method used

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  • A kind of hydrotalcite-plant cellulose composite pellet and its preparation method and application
  • A kind of hydrotalcite-plant cellulose composite pellet and its preparation method and application
  • A kind of hydrotalcite-plant cellulose composite pellet and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1 Preparation of hydrotalcite-plant cellulose composite pellets

[0060] Pretreatment and cellulose extraction of royal bamboo grass: cut the royal bamboo grass into small pieces, wash the surface dust with tap water, and finally rinse twice with ultra-pure water, put it into a pot with ultra-pure water and boil for 4 hours, Put it into an oven for drying, grind it with a pulverizer, pass the pulverized sample through a 100-mesh sieve, and place it in a desiccator to dry to constant weight to obtain a powder. Extract cellulose with nitric acid-ethanol method, add the above powder into 250ml of nitric acid ethanol solution (volume ratio of nitric acid ethanol is 1:4) according to the mass-to-liquid ratio of 1g:25ml, install a condensing reflux device, and heat in a water bath at 90°C for 2h , Wash the obtained cellulose powder with nitric acid ethanol solution twice, and then wash with hot water until the washing solution is neutral. The filtrate was sucked d...

Embodiment 2

[0064] Embodiment 2 Preparation of hydrotalcite-plant cellulose composite pellets

[0065] Pretreatment and cellulose extraction of royal bamboo grass: cut the royal bamboo grass into small pieces, wash the surface dust with tap water, and finally rinse twice with ultra-pure water, put it into a pot with ultra-pure water and boil for 4 hours, Put it into an oven for drying, grind it with a pulverizer, pass the pulverized sample through a 100-mesh sieve, and place it in a desiccator to dry to constant weight to obtain a powder. Extract cellulose with nitric acid-ethanol method, add the above powder into 250ml of nitric acid ethanol solution (volume ratio of nitric acid ethanol is 1:4) according to the mass-to-liquid ratio of 1g:25ml, install a condensing reflux device, and heat in a water bath at 90°C for 2h. The obtained cellulose powder was rinsed twice with nitric acid ethanol solution, and then washed with hot water until the washing liquid was neutral. The filtrate was su...

Embodiment 3

[0069] Example 3 Adsorption Application of Hydrotalcite-Plant Cellulose Composite Beads to Nanoplastics

[0070] Adsorption: Weigh 3 parts (200 pieces each) of the hydrotalcite-plant cellulose composite pellet adsorbent prepared in the above-mentioned Example 1 and add them to 50ml of water containing nanoplastics, and shake at a constant temperature of 25 degrees in a constant temperature oscillator The adsorption operation was carried out for 24 hours to test the concentration of nanoplastics (the main component is polystyrene, the particle size is about 100-200nm) in water. The initial concentration of the configured nanoplastics in water is 25 mg / L, and after 24 hours, the average concentration drops to 8 mg / L, and the average adsorption rate is 68%.

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Abstract

The invention discloses hydrotalcite-plant cellulose composite pellets and a preparation method and application thereof. The preparation method comprises the following steps: adding plant cellulose powder and hydrotalcite into a mixed aqueous solution of polyvinyl alcohol and sodium alginate, uniformly mixing, adding the mixed aqueous solution into a mixed aqueous solution of boric acid and calcium chloride, and calcifying to obtain the hydrotalcite-plant cellulose composite pellets. The selected plant cellulose and hydrotalcite have wide sources and are safe and nontoxic; the preparation process is simple, and no other pollutants are mixed; the pellets' size is controllable, is easy for experimental operation, and facilitates the recovery; and the prepared hydrotalcite-plant cellulose composite pellets can effectively adsorb and process nanoscale plastics.

Description

technical field [0001] The invention belongs to the technical field of sewage purification and treatment in environmental protection, and in particular relates to a hydrotalcite-plant cellulose composite pellet and a preparation method and application thereof. Background technique [0002] Due to its unique layered structure, hydrotalcite has broad application prospects in the fields of catalysis, medicine, ion exchange and adsorption. Hydrotalcite is usually in powder form, although it is effective in treating pollutants in water, it is not conducive to recycling. The cellulose is extracted from the imperial bamboo grass, which is a large biomass plant with strong tillering, fast growth, high yield, rich nutrition, and can be harvested for many years. The leaves of the imperial bamboo grass can be used as feed to feed cattle , sheep, rabbits, fish and other herbivores, and are also widely used in papermaking, food and other fields; at the same time, due to the well-develop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/10B01J20/24C02F1/28
Inventor 黄柱坚孙洁刘俊宏陈紫盈崔理华
Owner SOUTH CHINA AGRI UNIV