Preparation method and application of sodium alginate microspheres

A technology of sodium alginate and microspheres, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the problem of color deterioration, difficult recycling of adsorbents, secondary pollution, etc. problems, to achieve the effect of strong recycling and regeneration ability, significant removal effect and reduced recycling cost

Inactive Publication Date: 2015-11-25
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the removal of PCP or Phe by activated carbon and biochar in water makes it difficult to recycle the adsorbent. In addition, a large amo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Recover the discarded reeds, wash them with deionized water, air-dry to constant weight, pulverize them with a plant grinder, pass through a 60-mesh sieve, weigh 50 g of reed powder in a container filled with N 2 Pyrolyze in a muffle furnace with a heating rate of 15°C / min and a pyrolysis temperature of 600°C. After pyrolysis for 2 hours, cool to room temperature and take it out. Pass through a 100-mesh sieve to obtain the original reed biochar.

[0021] In order to remove the ash and soluble substances in the reed biochar, take 10g of the original reed biochar, soak it in 1mol / L hydrochloric acid (V:m=20:1), shake it at 25°C and 180rpm for 12h, and filter it. The filtrate was discarded, and then the reed biochar was repeatedly washed with deionized water until the pH value of the filtrate was 7, and then dried at 60°C to obtain the reed biochar.

[0022] Accurately weigh 2.0g of reed biochar and add it to a beaker containing 100mL of deionized water, stir evenly with a...

Embodiment 2

[0029] The discarded reeds were recovered, washed with deionized water, air-dried to constant weight, crushed with a plant grinder, passed through a 60-mesh sieve, and 50 g of reed powder was weighed and pyrolyzed in a muffle furnace filled with N2 at a heating rate of 15 °C / min, the pyrolysis temperature is 600°C, after pyrolysis for 2 hours, cool to room temperature, take it out, and pass through a 100-mesh sieve to obtain reed biochar.

[0030] Accurately weigh 0.010g of the above-mentioned reed biochar, add it to 40mL of PCP aqueous solution with a concentration of 20mg / L, shake it in a constant temperature oscillator at 25°C and 210rmp for 16h, take it out and filter, measure the PCP concentration of the filtrate, and the result is PCP Removal rate up to 22.1%

[0031] Accurately weigh 0.015g sodium alginate, add it to 100mL Phe aqueous solution with a concentration of 0.8mg / L, shake it in a constant temperature oscillator at 25°C and 210rmp for 24h, take it out and filt...

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PUM

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Abstract

The invention discloses a preparation method and application of sodium alginate microspheres. After reeds are washed, dried in air and crushed, reed powder is placed in a 600 DEG C muffle furnace (the environment is full of N2) to be subjected to pyrolysis for 2 h, after being cooled, the reed power is sieved through a 100-mesh sieve, and reed biochar is obtained after the reed powder is subjected to chlorohydric acid pickling. Meanwhile, sodium alginate is dissolved in deionized water to be prepared into a 4% sodium alginate solution. A 20g/L reed biochar aqueous solution and the sodium alginate solution are evenly mixed according to the volume ratio of 1:1, a mixed solution is dropped into a CaCl2 solution through a peristaltic pump, and reed biochar-sodium alginate microsphere adsorption materials are made. The sodium alginate microspheres are environment-friendly materials and low in cost, the preparation method is simple and easy to implement, specifications are uniform, the sodium alginate microspheres have a good adsorption effect on pentachlorophenol (PCP) and phenanthrene (Phe) and are easy to recycle and high in acid and alkali resistance. The preparation method can be used for waste water treatment and can also be used as growing carriers of microorganisms, algae and the like.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a preparation method of sodium alginate microspheres and an application thereof. Background technique [0002] Pentachlorophenol (PCP) is an ionizable ionic chlorophenol compound, which is listed as a priority pollutant for its high toxicity and strong resistance to biodegradation. PCP has stable chemical properties, is not easy to degrade, has low volatility, is difficult to migrate through the air, and has strong toxicity. It can cause differences in the five major systems of the human body (respiratory system, endocrine system, reproductive system, nervous system and skin system). Degree of damage, and has carcinogenic, teratogenic and mutagenic effects. Phenanthrene (Phenanthrene, Phe) is a typical polycyclic aromatic hydrocarbon (PAHs) with obvious molecular structure characteristics formed by the fusion of three benzene rings. As a typical organic...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/58C02F101/36C02F101/30
Inventor 郎印海彭鹏王小梅
Owner OCEAN UNIV OF CHINA
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