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Heavy metal wastewater adsorbent and preparation method thereof

An adsorbent and heavy metal technology, applied in the field of heavy metal wastewater adsorbent and its preparation, can solve the problems of low adsorption capacity, low adsorption rate, long adsorption time of adsorbent, etc. The effect of heavy metal adsorption capacity

Pending Publication Date: 2021-05-11
ZHENJIANG HEYUN IND WASTEWATER DISPOSAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the adsorbents have long adsorption time, low adsorption rate and low adsorption capacity.

Method used

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  • Heavy metal wastewater adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0039] Weigh the rice straw and put it into the steam blasting tank, fill the blasting tank with water vapor at a temperature of 120°C until the pressure in the tank rises to 0.9MPa, seal the blasting tank, let it stand at constant temperature and pressure for 30 minutes, and then open it after standing The explosion tank releases water vapor to obtain steam explosion products;

[0040] In parts by weight, weigh 100 parts of the above steam explosion product and 3 parts of Lactobacillus, 1 part of Saccharopolyspora, 2 parts of Staphylococcus, 80 parts of deionized water and 8 parts of glucose, mix them evenly and put them into a fermenter , the sealed fermentation tank was left to ferment at 35°C for 3 days, and after the fermentation was completed, the filter residue was obtained by filtration, washed with deionized water for 3 times, and then dried to obtain modified straw fibers;

[0041] Mix polyvinyl alcohol and distilled water at a mass ratio of 1:10, heat up to 100°C, s...

example 2

[0045] Weigh the rice straw and put it into the steam blasting tank, fill the blasting tank with water vapor at a temperature of 125°C until the pressure in the tank rises to 1.0MPa, seal the blasting tank, let it stand at constant temperature and pressure for 32 minutes, and then open it after standing The explosion tank releases water vapor to obtain steam explosion products;

[0046] In parts by weight, weigh 105 parts of the above-mentioned steam explosion product and 3 parts of Lactobacillus, 1 part of Saccharopolyspora, 2 parts of Staphylococcus, 85 parts of deionized water and 8 parts of glucose and mix them evenly and put them into the fermenter , the sealed fermentation tank was left to ferment at 38°C for 3 days, and after the fermentation was completed, the filter residue was obtained by filtration and separation, washed with deionized water for 3 times, and then dried to obtain modified straw fibers;

[0047] Mix polyvinyl alcohol and distilled water at a mass rati...

example 3

[0051] Weigh the rice straw and put it into the steam blast tank, fill the blast tank with water vapor at a temperature of 140°C until the pressure in the tank rises to 1.2MPa, seal the blast tank, let it stand at constant temperature and pressure for 40 minutes, and then open it after standing The explosion tank releases water vapor to obtain steam explosion products;

[0052] In parts by weight, weigh 120 parts of the above-mentioned steam explosion product and 5 parts of Lactobacillus, 2 parts of Saccharopolyspora, 4 parts of Staphylococcus, 100 parts of deionized water and 10 parts of glucose and mix them evenly and put them into a fermenter , the sealed fermenter was left to ferment at 45°C for 5 days, and after the fermentation was completed, the filter residue was obtained by filtration and separation, washed with deionized water for 5 times, and then dried to obtain modified straw fibers;

[0053] Mix polyvinyl alcohol and distilled water at a mass ratio of 1:10, heat ...

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Abstract

The invention relates to a heavy metal wastewater adsorbent and a preparation method thereof, and belongs to the technical field of wastewater treatment equipment. The method comprises the following steps: carrying out steam explosion re-modification on straw fibers, doping the modified fibers into polyvinyl alcohol and chitosan composite foam gel, carrying out repeated freezing and thawing cycle treatment, carrying out potassium permanganate oxidation treatment, and finally carrying out alkaline leaching modification to finally prepare the heavy metal wastewater adsorbent with excellent adsorption performance.

Description

technical field [0001] The invention relates to a heavy metal wastewater adsorbent and a preparation method thereof, belonging to the technical field of wastewater treatment equipment. Background technique [0002] At present, electroplating is one of the three major polluting industries in the world today. About 4 billion cubic meters of electroplating wastewater is discharged in my country every year, which is equivalent to the tap water supply of several large and medium-sized cities. About 50% of the electroplating wastewater does not meet the national discharge standards. The wastewater contains harmful substances such as heavy metal ions, organic compounds and inorganic compounds. These substances will definitely cause extensive and serious harm to the ecological environment and human beings when they enter the environment. [0003] The treatment methods of heavy metal wastewater in electroplating wastewater can be divided into three categories according to the main l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20C02F103/16
CPCB01J20/261B01J20/24B01J20/28045C02F1/285C02F2101/20C02F2103/16
Inventor 赵先辉候敬义彭勇
Owner ZHENJIANG HEYUN IND WASTEWATER DISPOSAL CO LTD
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