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A kind of heavy metal biosorbent and preparation method thereof

A biological adsorbent and heavy metal technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of few types of heavy metal adsorption, difficult to adapt to sewage treatment with complex composition of heavy metals, etc., and achieve adsorption capacity Strong and stable, wide applicability, mild effect

Active Publication Date: 2018-12-28
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that current biosorbents adsorb few types of heavy metals in sewage and are difficult to adapt to the current sewage treatment with complex composition of heavy metals, the present invention provides a heavy metal biosorbent that can be applied to the adsorption of various metals and has high adsorption efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The present embodiment is a kind of heavy metal biosorbent, including raw materials in the following weight ratio: modified plant waste powder 30Kg, algae powder 20Kg, sodium alginate 10Kg, gelatin 10Kg, polyurethane 3Kg, ethanol 3Kg, water 800Kg, its preparation method for:

[0035] 1) Weigh and mix sodium alginate, gelatin, polyurethane, ethanol and water according to the weight ratio, and stir at 30°C for 30 minutes to obtain a colloidal solution;

[0036] 2) Weigh the modified plant waste powder and algae powder and add them into the colloidal liquid, and stir for 60 minutes to obtain the mixed liquid;

[0037] 3) Drop the mixed liquid into 30g / L calcium chloride solution to complete the solidification. The volume of the mixed liquid and calcium chloride solution is 1:10. Filter and collect microspherical solids with a particle size of 1mm, and rinse with water, that is Obtain heavy metal biosorbent crude product;

[0038] 4) Transfer the crude heavy metal biosorb...

Embodiment 2

[0045] The present embodiment is a kind of heavy metal biosorbent, including raw materials in the following weight ratio: modified plant waste powder 50Kg, algae powder 30Kg, sodium alginate 20Kg, gelatin 20Kg, polystyrene 5Kg, petroleum ether 5Kg, water 1000Kg, Its preparation method is:

[0046] 1) Weigh and mix sodium alginate, gelatin, polystyrene, petroleum ether and water according to the weight ratio, and stir at 40°C for 60 minutes to obtain a colloidal solution;

[0047] 2) Weigh the modified plant waste powder and algae powder and add them into the colloidal liquid, and stir for 90 minutes to obtain the mixed liquid;

[0048] 3) Drop the mixed solution into 50g / L calcium chloride solution to complete the solidification. The volume of the mixed solution and calcium chloride solution is 1:20. Filter and collect the microspherical solid with a particle size of 3mm, rinse with water, that is Obtain heavy metal biosorbent crude product;

[0049] 4) Transfer the crude he...

Embodiment 3

[0056] The present embodiment is a kind of heavy metal biosorbent, comprising raw materials in the following weight ratio: 40Kg of modified plant waste powder, 25Kg of algae powder, 15Kg of sodium alginate, 15Kg of gelatin, 4Kg of polyacrylate, 4Kg of acetone, and 900Kg of water. The preparation method is:

[0057] 1) Weigh and mix sodium alginate, gelatin, polyacrylate, acetone and water according to the weight ratio, and stir at 35°C for 45 minutes to obtain a colloidal solution;

[0058] 2) Weigh the modified plant waste powder and algae powder and add them into the colloidal liquid, and stir for 70 minutes to obtain the mixed liquid;

[0059] 3) Drop the mixed liquid into 40g / L calcium chloride solution to complete the solidification. The volume of the mixed liquid and calcium chloride solution is 1:15. Filter and collect microspherical solids with a particle size of 2mm, and rinse with water, that is Obtain heavy metal biosorbent crude product;

[0060] 4) Transfer the ...

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Abstract

The invention discloses a heavy-metal biological absorbent. The biological absorbent is prepared from the following raw materials in parts by weight: 30 to 50 parts of modified plant waste powder, 20 to 30 parts of algae powder, 10 to 20 parts of sodium alginate, 10 to 20 parts of gelatin, 3 to 5 parts of adhesive, 3 to 5 parts of organic solve and 800 to 1,000 parts of water. A preparation method of the heavy-metal biological absorbent comprises the following steps of 1), preparing colloidal liquid; 2), preparing a mixed solution; 3), preparing a heavy-metal biological absorbent crude product; and 4), preparing the heavy-metal biological absorbent. According to the heavy-metal biological absorbent, plant waste is structurally modified and is used as a main component of the heavy-metal biological absorbent; the prepared heavy-metal biological absorbent has wide practicability, and has obvious adsorption effects on all heavy metals of lead, nickel, chromium, copper, zinc, cadmium, mercury and the like in sewage; the adsorption capacity reaches 31.6mg / g or above; and further, the elution rate of a highly acidic solution to the heavy-metal biological absorbent reaches 95 percent or above.

Description

technical field [0001] The invention belongs to the field of biosorbents, in particular to a heavy metal biosorbent and a preparation method thereof. Background technique [0002] The direct discharge of heavy metal sewage will not only cause serious pollution to the environment, but also directly affect the healthy life of human beings. Common methods for treating heavy metals in sewage include ion exchange, solvent extraction, flocculation, membrane separation, and adsorption. Among them, the adsorption method is currently the most commonly used and most environmentally friendly treatment method. Activated carbon is the most widely used adsorbent in wastewater treatment, but activated carbon is expensive and difficult to regenerate, which limits its application prospects. [0003] In recent years, the use of inexpensive plant wastes as biosorbents for the treatment of heavy metals in wastewater has attracted attention. Chinese patent CN105251455A discloses a method for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/24B01J2220/4825C02F1/28
Inventor 刘俊稚俞兴发葛亚明
Owner ZHEJIANG OCEAN UNIV
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