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Biochar capable of adsorbing heavy metals as well as preparation method and application thereof

A technology for adsorbing heavy metals and biochar, applied in carbon preparation/purification, non-metallic elements, chemical instruments and methods, etc., can solve problems such as high cost, complicated treatment process, and many steps

Active Publication Date: 2020-06-23
JIANGSU OPEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing treatment process is relatively complicated, with many steps and high cost; therefore, it is necessary to research and develop a large specific surface area and a special pore structure on the basis of the existing technology, which is resistant to lead, arsenic, mercury, copper, etc. New composite material with very good adsorption properties for heavy metals

Method used

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  • Biochar capable of adsorbing heavy metals as well as preparation method and application thereof
  • Biochar capable of adsorbing heavy metals as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 7

[0093] Example 7 Copper ion adsorption experiment

[0094] Weigh 0.05g each of the samples obtained from the above examples 1 to 6 and place them in a 500ml wide-mouthed Erlenmeyer flask. In each sample, add CU at a concentration of 100mg / L. 2+ Solution. Place the Erlenmeyer flask in a double-layer constant temperature shaker at (25±5)℃, shake at 150r / min for 12h, take out the 0.45μm microporous membrane, and measure Cu in the filtrate by flame atomic absorption spectrometer 2+ , And calculate the combined material of different embodiments to Cu in solution 2+ The adsorption capacity and removal rate.

[0095] It can be seen from Table 7 that the adsorption capacity of the composite adsorbents with different composition ratios to copper ions is obviously different; 2+ The adsorption effect is also the strongest, followed by Example 6, which is better than other groups, indicating that the composite adsorption material composed of the raw materials of Example 1 of the present inventi...

Embodiment 8

[0098] Example 8 Nickel ion adsorption experiment

[0099] Weigh 0.05g each of the samples prepared in the above Examples 1 to 6 and place them in a 500ml wide-mouth Erlenmeyer flask. Add Ni at a concentration of 100mg / L to each sample. 2+ Solution. Place the Erlenmeyer flask in a double-layer constant temperature shaker at (25±5)℃, oscillate at 150r / min for 12h, remove the 0.45μm microporous membrane, and measure the Ni in the filtrate by flame atomic absorption spectrometer 2+ , And calculate the combined material of different embodiments to the Ni in solution 2+ The adsorption capacity and removal rate.

[0100] It can be seen from Table 8 that the adsorption capacity of the composite adsorbents with different composition ratios to nickel ions is significantly different; 2+ The adsorption effect of is also the strongest, better than other groups, indicating that the composite adsorption material composed of the raw materials of Example 1 of the present invention can achieve bette...

Embodiment 9

[0103] Example 9 Chromium ion adsorption experiment

[0104] Weigh 0.05g each of the samples prepared in the above Example 1 to Example 6 and place them in a 500ml wide-mouth Erlenmeyer flask. Each sample is added with a concentration of 100mg / L Cd 2+ Solution. Place the Erlenmeyer flask in a double-layer constant temperature shaker at (25±5)℃, shake at 150r / min for 12h, take out the 0.45μm microporous membrane, and use flame atomic absorption spectrometer to determine the Cd in the filtrate 2+ , And calculate the combination of materials in different embodiments to Cd in the solution 2+ The adsorption capacity and removal rate.

[0105] It can be seen from Table 9 that the adsorption capacity of the composite adsorbents with different composition ratios to chromium ions is obviously different; 2+ The adsorption effect is better than other groups, indicating that the composite adsorption material composed of the raw materials of Example 1 of the present invention has a larger specif...

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Abstract

The invention discloses biochar capable of adsorbing heavy metals and a preparation method of the biochar, the biochar comprises shaddock peel biochar, and the biochar is prepared by the following method: cutting shaddock peel into pieces, cleaning with water to remove impurities, drying to constant weight, crushing and sieving; adding absolute ethyl alcohol and NaOH, mixing and stirring, adding aMgCl2 solution, mixing and soaking, carrying out suction filtration, washing with water until the pH value is neutral, and drying; and putting the dried shaddock peel into a tubular furnace, heatingto 300-600 DEG C in vacuum, calcining, and cooling to obtain the product. The method has the advantages of easily available raw materials, low cost, easy popularization and application, high efficiency, economy, environmental protection and the like. Through a large number of experimental screening, shaddock peel and other wastes are fully utilized, waste is turned into wealth, and the product isprepared through a preferred process. Comparison experiment screening results show that compared with unmodified biochar, the biochar obtained after the shaddock peel is modified through a specific process has a better pore structure and a better heavy metal adsorption capacity.

Description

Technical field [0001] The invention relates to a biological charcoal capable of adsorbing heavy metals and a preparation method and application thereof, and belongs to the field of environmentally friendly new materials. Background technique [0002] Heavy metals such as lead, arsenic, mercury, copper, etc., can enter the human body through the food chain due to their physical toxicity, high biological toxicity, hard-to-degrade and persistence, and cause serious effects on the human body, animals and plants through cumulative amplification. For example, excessive lead ions will invade the human hematopoietic system, nervous tissues and kidneys, causing neurasthenia, red blood cell anemia, and hypohemoglobin anemia. Copper ions can cause skin necrosis, hemoglobin degeneration, etc., thereby affecting metabolism and causing cardiovascular disease. Kind of disease. [0003] At present, there has been a lot of research on the treatment of industrial heavy metal wastewater. The main t...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C01B32/05C01B32/318C01B32/324C02F101/20C02F101/22
CPCB01J20/06B01J20/103B01J20/106B01J20/20B01J20/22B01J20/262B01J2220/4825B01J2220/485B01J2220/4887C02F1/288C02F2101/20C02F2101/22C01B32/05C01B32/318C01B32/324
Inventor 韩承辉谢伟芳关莹张瑞敏
Owner JIANGSU OPEN UNIV
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