Heavy metal biological adsorbent and preparation method thereof

A biosorbent, heavy metal technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of long time, high cost, complicated operation, etc., to improve the adsorption effect, low equipment requirements , the effect of simple operation

Inactive Publication Date: 2013-02-13
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method requires a long period of in vitro culture to obtain enough mycelium, and there are also problems such as complicated operation, high cost, and long time consumption.

Method used

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  • Heavy metal biological adsorbent and preparation method thereof
  • Heavy metal biological adsorbent and preparation method thereof
  • Heavy metal biological adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Preparation of bacteria powder

[0052] Take the black velvet cap boletus, wash it with deionized water; put it in a constant temperature drying box, and dry it at 50±2°C until it reaches a constant weight; after cooling, put it in a pulverizer and grind it to make a corresponding dry Bacteria powder: Sieve the obtained bacteria powder through 80-mesh, 100-mesh, 120-mesh, 150-mesh and 300-mesh sampling sieves for particle size classification, and obtain particle sizes of 150-200 μm, 125-150 μm, 100-125 μm and 4 kinds of adsorbent powders of 50-100μm.

[0053] (2) Adsorption test

[0054] Take four 250 mL clean Erlenmeyer flasks with stoppers, and add 25 mL of lead solution with a concentration of 100 mg / L (1000 mg / L lead standard solution GSB 04-1742- 2004 diluted 10 times), respectively weighed 500 mg of the above-mentioned boletus powder and added them to the triangular flask (each bottle corresponds to a boletus powder in a particle size range), and another 4 c...

Embodiment 2

[0058] Get the boletus powder 500 mg of 150-200 μ m particle size prepared in Example 1 and 200 μ L concentration is the polyethylene solution of 5 mg / mL and mix evenly, be placed in the mold that cross section is circular, adopt hand-operated hydraulic press at 0.5 The pressure was maintained at MPa for 10 seconds, and the sample was withdrawn from the mold to obtain a circular cake of adsorbent.

[0059] Take 2 adsorbent discs prepared by the above method and place them in 25 mL of lead solution and cadmium solution with a concentration of 100 mg / L respectively. After 1 hour of adsorption, take out the adsorbent discs and measure the filtrate with an atomic absorption spectrophotometer. The concentration of heavy metal ions remaining in C f , and simultaneously determine the initial concentrations of metal ions in the prepared lead and cadmium solutions C i , with three replicates for each treatment. And formula 1 and formula 2 were used to calculate the respective ads...

Embodiment 3

[0062] Take the black velvet cap boletus, wash it with deionized water; put it in a constant temperature drying box, and dry it at 50±2°C until it reaches a constant weight; after cooling, put it in a pulverizer and grind it to make a corresponding dry Bacteria powder: Sieve the obtained bacteria powder with 80-mesh and 300-mesh sampling sieves to obtain adsorbent powder with a particle size of 50-200 μm. Using the same method as the adsorption test in Example 1, it was measured that the adsorption capacity to lead was 4.3 mg / g, and the adsorption rate was 86%; the adsorption capacity to cadmium was 2.2 mg / g, and the adsorption rate was 44%.

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Abstract

The invention discloses a heavy metal biological adsorbent and a preparation method of the heavy metal biological adsorbent. The biological adsorbent takes boletes as main ingredients and is prepared in the following steps that the boletes of various types and parts are selected, cleaned, separated, dried, smashed, sieved and the like. The biological adsorbent can be used for specific adsorption of heavy metal in various media, and is simple and fast in technology, low in equipment requirement and cost, simple and convenient to use, and high in adsorption efficiency.

Description

technical field [0001] The invention belongs to the field of heavy metal adsorbents, in particular to a heavy metal biosorbent mainly composed of large fungi. Background technique [0002] With the development of industry and the impact of human activities, the situation of heavy metal pollution has become increasingly severe. Various heavy metals produced in processes such as metal smelting, mining, chemical wastewater, and fossil fuel combustion enter the atmosphere, water, and soil. Different from organic pollutants, heavy metals cannot be directly degraded into non-toxic and harmless substances under natural conditions and can be completely eliminated. Even if some heavy metals can form insoluble forms in the soil, once the soil environment changes, some Heavy metals are released again and are toxic to soil organisms. Heavy metal pollution has the characteristics of concealment, irreversibility and long-term nature, and it is a kind of accumulative chronic pollution. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
Inventor 张丹李伟张瑜
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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