Preparation method for mushroom residue charcoal adsorbent and application thereof

A biochar and adsorbent technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, water pollutants, etc., can solve problems such as non-point source pollution and resource waste, and achieve high adsorption efficiency, low cost, and raw material source. rich effects

Inactive Publication Date: 2017-08-25
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biomass used to prepare biochar generally comes from agricultural straw, bark, peanut shells, distiller's grains, sawdust, edible fungus substrates, etc. These biomass resources are often regarded as solid wastes and are landfilled or incinerated, which not only leads to resources Serious waste of waste, more significant non-point source pollution

Method used

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  • Preparation method for mushroom residue charcoal adsorbent and application thereof
  • Preparation method for mushroom residue charcoal adsorbent and application thereof
  • Preparation method for mushroom residue charcoal adsorbent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of fungus chaff biochar adsorbent:

[0026] (1) Put the fungus chaff into a constant temperature drying incubator at 80°C to dry to constant weight, crush it, and pass it through a 40-mesh sieve.

[0027] (2) Sieve the fungus chaff powder ( figure 1 ) were sterilized by high-pressure steam at 121°C and stored in a dry environment for later use.

[0028] (3) Put the fungus chaff powder in a carbonization furnace, use nitrogen as a protective gas, and carry out anaerobic carbonization at 600°C for 4 hours, take it out after cooling to room temperature, and pass through a 10-mesh sieve to obtain the fungus chaff biochar powder.

[0029] (4) Add 100 g of fungus chaff biochar powder into a conical flask containing 1L of deionized water, shake for 3 h in a shaker at a speed of 150 r / min, remove the aqueous solution after cleaning, and add deionized water again Wash and repeat 3 times to remove soluble minerals, and dry at 80°C to constant weight to obtain fungal...

Embodiment 2

[0031] Static adsorption of divalent copper ions by bacterial chaff biochar adsorbent:

[0032] Determination of the adsorption of fungal chaff biochar under different pH (2~5), initial concentration (25~150 mg / L), adsorbent dosage (0.5~4 g / L), adsorption time (30~300 min) Effect. After the adsorption is over, the atomic absorption spectrophotometer measures the copper ion content in the filtered aqueous solution. Calculate the adsorption rate R and adsorption capacity Q . Adsorption rate (%) and adsorption capacity Q (mg / g) Calculated according to the following formula:

[0033]

[0034] Where: C j Indicates the initial concentration of metal ions, mg / L;

[0035] C e Indicates the equilibrium concentration of metal ions, mg / L;

[0036] m represents the mass of the adsorbent, g;

[0037] V represents the volume of the metal ion solution used for adsorption, L.

[0038] Under the conditions of pH=5, the initial concentration of divalent copper ions was 50 mg / L, th...

Embodiment 3

[0040] Static adsorption of divalent lead ions by bacterial chaff biochar adsorbent:

[0041] Under the conditions of pH=5, the initial concentration of divalent lead ions was 50 mg / L, the dosage of adsorbent was 2 g / L, the adsorption time was 120 min, the temperature was 25 °C, and the rotation speed was 180 r / min, the black The adsorption rates of fungus, Flammulina velutipes, Pleurotus ostreatus and Lentinus edodes biochar were 97.8%, 96.6%, 97.1% and 98.4%, and the adsorption amounts were 24.45 mg / g, 24.15 mg / g, 24.28 mg / g and 24.59 mg / g, respectively. g.

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Abstract

The invention discloses a preparation method for a mushroom residue charcoal adsorbent and an application thereof. The method comprises the following steps: 1) drying mushroom residue, crushing and screening, thereby acquiring mushroom residue powder; 2) charring the mushroom residue powder into a charring furnace, and then cooling to room temperature, taking out and screening, thereby acquiring mushroom residue charcoal powder; 3) adding the mushroom residue charcoal powder into a conical flask containing deionized water, oscillating in a shaking table, removing an aqueous solution after cleaning, adding deionized water for repeatedly cleaning and drying, thereby acquiring the mushroom residue charcoal adsorbent. The mushroom residue charcoal adsorbent prepared according to the invention has average specific surface area reaching up to 200m<2>/g and average pore volume reaching about 0.15cm<3>/g, has a large amount of phi conjugated aromatic structures, has a universal adsorption capacity to heavy metal positive ions and can effectively remove lead, cadmium, zinc and copper from water at the maximal removal rate of 98.4%, 91.1%, 91.8% and 97.9%, respectively.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a preparation method and application of a heavy metal cationic biochar adsorbent. Background technique [0002] With the acceleration of industrial development and urbanization, industries such as metallurgy, electroplating, machinery manufacturing, and organic synthesis have produced a large amount of wastewater containing heavy metal cations, seriously endangering the ecological environment and human health. However, the traditional chemical precipitation method has the disadvantages of high cost and easy to cause new pollution. Biosorption method is to use the structure and characteristics of organisms to adsorb metal cations in water, and then remove metal ions in aqueous solution through solid-liquid two-phase separation. It is a new method for treating heavy metal-containing wastewater in recent years. Secondary pollution and other advantages. Various biolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/62C02F101/20
CPCB01J20/20B01J2220/42B01J2220/4875C02F1/283C02F2101/20
Inventor 曲娟娟程茁戴航宇卢璐金羽丁伟
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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