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Sulfur-based biochar material, and preparation method and application thereof

A biochar and sulfur-based technology, applied to chemical instruments and methods, water pollutants, and other chemical processes, can solve the problem of low adsorption capacity, achieve low raw material costs, huge output, and simple extraction methods

Inactive Publication Date: 2020-10-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although single biochar has certain adsorption characteristics for mercury ions, the adsorption capacity is low.

Method used

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  • Sulfur-based biochar material, and preparation method and application thereof
  • Sulfur-based biochar material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In the preparation process of sulfur-based biochar described in this example, the ratio of thiolimonene to biochar is 0.3:1, and the preparation process is as follows:

[0037] (1) Put 25g of sublimed sulfur in an oil bath and heat to 170°C, then add 25g of D-limonene dropwise within 3 minutes, and react for 3 hours under magnetic stirring.

[0038] (2) After washing the pomelo peel with deionized water for 3 times, put it in an oven at 105°C and dry it for 1 day; grind it with a mortar for 10 minutes to make the particle size pass through a 10-mesh sieve.

[0039] (3) Put the dried and ground pomelo peel in a 200ml aluminum box, the volume of the aluminum box is Cover it, put it into the muffle furnace, set the heating rate to 300°C / h, the carbonization temperature to 600°C, and the holding time to 2h.

[0040] (4) Put 0.3 g of thiolimonene prepared in step (1) in a 100ml porcelain crucible, put it on a heating plate, set the temperature of the heating plate to 140° ...

Embodiment 2

[0043] In the preparation process of sulfur-based biochar described in this example, the ratio of thiolimonene to biochar is 0.6:1, and the preparation process is as follows:

[0044] Other conditions are the same as in Example 1, except that in step (4), 0.6 g of thiolimonene produced in step (1) is placed in a 100 ml porcelain crucible, placed on a heating plate, and the temperature of the heating plate is set at 140 ° C. After 5 minutes, Thiolimonene was melted to a flow state, and 1 g of biochar prepared in step (3) was added, stirred with a glass rod every 20 min for 1 min, and reacted for 3 h. That is, sulfur-based biochar is obtained.

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Abstract

The invention discloses a sulfur-based biochar material, and preparation and application thereof. According to the sulfur-based biochar material, thiolimonene is taken as a central substance, pomelo peel biochar having undergone anoxic high-temperature carbonization is taken as a carrier, and sulfur-based biochar for remediation of mercury-polluted water is prepared by adopting a method of loadingthiolimonene on biochar. The synthesized sulfur-based biochar material is added into a mercury solution according to a certain proportion and oscillated according to a certain frequency, and after 48h, the removal rate of solution-state mercury in 1 mg / L of mercury-polluted water can reach 99% or above and reach a sewage discharge standard limit value or below. The sulfur-based biochar materialis simple in preparation process, low in cost, efficient in action, free of toxicity and free of secondary pollution, and is an environment-friendly adsorbent for achieving the purpose of treating thewaste with the waste.

Description

technical field [0001] The invention belongs to the technical field of remediation of heavy metals in water, and in particular relates to a sulfur-based biochar material and a preparation method thereof, and an application method for using the sulfur-based biochar material to adsorb mercury in water bodies. Background technique [0002] Mercury is an environmental pollutant with strong toxicity to living organisms. Mercury in water mainly comes from human production and living activities, such as chlor-alkali industry, non-ferrous metal smelting, mercury mining, etc. Mercury pollution and mercury poisoning have caused serious human diseases, such as Minamata disease, so mercury pollution in water has always been one of the threats to human health. [0003] Existing water mercury separation methods mainly include adsorption method, ion exchange method, reverse osmosis method, membrane treatment, etc. Although ion exchange method, reverse osmosis method absorption and membran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/22B01J2220/46B01J2220/4806B01J2220/4812C02F1/283C02F1/285C02F2101/20
Inventor 杨志辉黄培成高世康杨卫春刘恢曾盖廖骐石岩
Owner CENT SOUTH UNIV
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