Preparation method of heavy metal adsorbent based on shrimp shell biomass charcoal with high specific surface area

A high specific surface area, biological adsorbent technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, pathogenic microorganism wastewater treatment, etc. The preparation process is simple, the cost is low, and the heavy metal adsorption rate is high.

Inactive Publication Date: 2018-12-21
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The prior art, such as the Chinese invention patent whose authorized announcement number is CN 104667884 B, discloses a method for preparing a heavy metal adsorbent based on cheap biomass materials and using chitosan as a binder to load activated carbon particles on the surface. Cut off the dried rush to obtain rush particles with a length of 2mm-5mm as the substrate, prepare a chitosan solution with a concentration of 10g/L-20g/L, add 10g-30g of activated carbon powder to it, and stir to mix Disperse evenly, obtain activated carbon powder dispersion liquid, put i

Method used

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  • Preparation method of heavy metal adsorbent based on shrimp shell biomass charcoal with high specific surface area
  • Preparation method of heavy metal adsorbent based on shrimp shell biomass charcoal with high specific surface area
  • Preparation method of heavy metal adsorbent based on shrimp shell biomass charcoal with high specific surface area

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Effect test

Embodiment 1

[0030] A kind of preparation method based on high specific surface area shrimp shell biochar comprises the steps:

[0031] The discarded Penaeus vannamei shrimp shells were repeatedly washed with water to remove various impurities, and dried for use; a square crucible containing 20 g of discarded Penaeus vannamei shrimp shells was placed in a tube furnace for calcining, and nitrogen gas was introduced at a flow rate of 100 mL / min, keep it for about 1h; after ensuring that there is an oxygen-free environment in the tube furnace, adjust the temperature to 900°C at a heating rate of 10°C / min, keep it warm for 3h, cool to room temperature, turn off the nitrogen, take it out, put it into a In a beaker of 1mol / L hydrochloric acid, stir for 1 hour with magnetic force, after suction filtration, wash with deionized water until the pH value of the solution is 7, then dry the sample at 105°C for 8 hours, then crush it, and pass it through a 100-mesh sieve , to obtain the shrimp shell-base...

Embodiment 2

[0035] A kind of preparation method based on high specific surface area shrimp shell biochar comprises the steps:

[0036] The discarded Penaeus vannamei shrimp shells were repeatedly washed with water to remove various impurities, and dried for use; a square crucible containing 20 g of discarded Penaeus vannamei shrimp shells was placed in a tube furnace for calcining, and nitrogen gas was introduced at a flow rate of 100 mL / min, keep it for about 1h; after ensuring that there is an oxygen-free environment in the tube furnace, adjust the temperature to 800°C at a heating rate of 10°C / min, keep it warm for 3h, cool to room temperature, turn off the nitrogen, take it out, put it into a In a beaker of 1mol / L hydrochloric acid, stir for 1 hour with magnetic force, after suction filtration, wash with deionized water until the pH value of the solution is 7, then dry the sample at 105°C for 8 hours, then crush it, and pass it through a 100-mesh sieve , to obtain the shrimp shell-ba...

Embodiment 3

[0041] A kind of preparation method based on high specific surface area shrimp shell biochar comprises the steps:

[0042] The discarded Penaeus vannamei shrimp shells were repeatedly washed with water to remove various impurities, and dried for use; a square crucible containing 20 g of discarded Penaeus vannamei shrimp shells was placed in a tube furnace for calcining, and nitrogen gas was introduced at a flow rate of 100 mL / min, keep it for about 1.5h; after ensuring an oxygen-free environment in the tube furnace, adjust the temperature to 800°C at a heating rate of 10°C / min, keep it warm for 2h, cool to room temperature, turn off the nitrogen, take it out, put it into the Put it in a beaker with 1mol / L hydrochloric acid, stir it magnetically for 1 hour, filter it with suction, wash it with deionized water until the pH value of the solution is 7, then dry the sample at 105°C for 12 hours, crush it, and pass it through 100 mesh Sieve to obtain the shrimp shell-based biosorbe...

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Abstract

The invention discloses a preparation method of a heavy metal adsorbent based on shrimp shell biomass charcoal with a high specific surface area. The preparation method comprises the following steps:washing collected waste penaeus vanmamei shrimp shells with tap water; removing various impurities; carrying out air drying, and drying; carrying out temperature-rising carbonization; mixing with hydrochloric acid and removing ash; after drying and sieving, carrying out KOH or ZnCl2 modification to prepare shrimp shell based biomass charcoal; then mixing with hydrochloric acid and removing ash; filtering, and washing and drying filtering dreg; sieving and filling into a bottle. The biomass charcoal can be used for adsorbing heavy metal ions in the wastewater. The preparation method disclosed by the invention has the beneficial effects that the preparation method is simple and low in cost and an obtained product has the high specific surface area and a strong adsorption capability; the adsorption capacity on Cr<6+> and Cd<2+> in wastewater which has the mass concentration of 10 to 400mg/L and contains heavy metal ions including Cr<6+>, Cr<6+> and the like reaches 20 to 320mg/L and the adsorption rate reaches 90 percent or above; the preparation method is suitable for being popularized and better applied in the field of water treatment.

Description

technical field [0001] The invention relates to the technical field of biosorbent preparation, in particular to a method for preparing a heavy metal adsorbent based on high specific surface area shrimp shell biochar. technical background [0002] With the continuous development of the economy, environmental pollution is becoming more and more serious, and heavy metal pollution incidents are becoming more and more frequent, such as "Shimen Arsenic Poisoning", "Children's Blood Lead", and "Cadmium Rice" are all public health concerns that are most concerned by the people Representative of security incidents. In 2009, cadmium in vegetables in Liuyang, Hunan Province exceeded the standard, resulting in 509 villagers having excessive cadmium in their urine. The "Leather Milk" incident from 2009 to 2011 attracted widespread attention. In 2004, all kinds of agricultural products in Longling Village, Shaanxi Province were polluted to varying degrees by heavy metals such as lead, m...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20C02F103/00C02F103/10C02F103/16C02F103/30C02F103/32
CPCB01J20/20B01J2220/4881B01J2220/4887C02F1/283C02F2101/20C02F2103/003C02F2103/10C02F2103/16C02F2103/30C02F2103/32
Inventor 纪丽丽宋亚琴季小洋宋文东郭健蔡璐张海龙王亚宁
Owner ZHEJIANG OCEAN UNIV
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