Humic acid microsphere as well as preparation method and application thereof

A humic acid and microsphere technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of high cost and refractory degradation, and achieve high recycling rate, good practicality The effect of high stability and high removal efficiency

Inactive Publication Date: 2016-08-17
NANJING FORESTRY UNIV
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Problems solved by technology

[0006] Purpose of the invention: In view of the problems of high cost and difficult degradation in the existing adsorbent development technology, the purpose of the invention is to provide a kind of humic acid microspheres, which can fix the water-soluble natural polymer material humic acid on the starch Synthetic gel-like humic acid pellet adsorbent, this adsorbent material has a high removal efficiency for removing cationic dyes in wastewater, and has a high recycling rate, meeting the needs of practical applications

Method used

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  • Humic acid microsphere as well as preparation method and application thereof
  • Humic acid microsphere as well as preparation method and application thereof
  • Humic acid microsphere as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0029] The suspension polymerization granulation method is used to immobilize the humic acid in the starch by wrapping the water phase with the organic phase to prepare the humic acid microsphere material. The specific process is as follows:

[0030] Add 1mL of Span-80 and 2g of epichlorohydrin to 300mL of liquid paraffin, stir and mix; this is the organic phase. Add 3g of starch and 2g of humic acid to 50mL of water in the water phase, stir and heat the paste solution to 80°C, add 1.5g of sodium hydroxide at 30°C for alkalization, then add 3g of epichlorohydrin into a water bath at 20°C. Add the organic phase and the water phase successively to the 25°C oil bath reaction device for high-speed mechanical stirring, so that the water phase is dispersed into small liquid droplets in the organic phase, react for 24 hours, filter out the black humic acid microspheres, first use cyclohexane Wash 3 times with alkane to remove liquid paraffin, then wash 3 times with 100% ethanol to re...

Embodiment 2

[0035] The adsorption performance of embodiment 2 humic acid microspheres to crystal violet dye

[0036] The concentration of crystal violet was measured by absorbance at 590 nm with a UV-visible spectrophotometer.

[0037] The formula for calculating the adsorption capacity q is:

[0038] q = ( C 0 - C e ) V m

[0039] In the formula, C 0 and C e are the concentration of crystal violet solution before adsorption and adsorption equilibrium; V is the solution volume, and m is the mass of humic acid microsphere adsorbent.

[0040] The experiment of the effect of pH value on adsorption was carried out at room temperature 25°C. The initial concentration of the crystal violet solution is set at 400 mg / L, the pH value of the crystal violet dye solution is...

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Abstract

The invention discloses a humic acid microsphere as well as a preparation method and application thereof. An isoelectric point of the humic acid microsphere is pH 2, and is negatively charged when pH is more than 2, and the humic acid microsphere is of a quasi-spheral shape with a diameter of 1mm. According to the preparation method, humic acid is fixed on starch to form the fixed microsphere. The humic acid gel sphere is low in cost and environmentally friendly and can be completely biologically degraded; meanwhile, adsorptive property research of the humic acid gel sphere finds that the humic acid gel sphere has very high efficiency in the removal of cationic dyes in waste water as well as very high recovery utilization rate, so that the humic acid gel sphere has wide use in many fields of dye adsorption, water treatment, adsorbents and the like as well as very high practicability.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a humic acid microsphere (IHA) and its preparation method and application. Background technique [0002] With the development of industrialization, water pollution is becoming more and more serious, and one of the main types of pollution is dyes. Dye wastewater exists in chemical industry wastewater such as textile wastewater, papermaking wastewater, plastic wastewater, food and cosmetic wastewater. The high chroma of these wastewater also prevents the entry of light and affects the photosynthesis of aquatic organisms. Some dyes can also chelate heavy metal ions, endangering fish and other aquatic animals and plants. In addition, many dyes are themselves toxic or even carcinogenic. Therefore, it is of great environmental significance to study the removal of dyes in water. [0003] The most widely used and researched water treatment technologies are flocculation, adsorption, ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/30
CPCB01J20/24B01J2220/4812C02F1/286C02F2101/308
Inventor 陈荣平张银龙虞磊王晓燕沈连峰
Owner NANJING FORESTRY UNIV
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