A kind of biochar with heavy metal adsorption and its preparation method and application

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

Active Publication Date: 2020-12-08
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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  • A kind of biochar with heavy metal adsorption and its preparation method and application
  • A kind of biochar with heavy metal adsorption and its preparation method and application
  • A kind of biochar with heavy metal adsorption and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 7

[0093] Embodiment 7 Copper ion adsorption experiment

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

[0095] As can be seen from Table 7, the composite adsorption materials of different component ratios have significantly different adsorption capacities to copper ions; 2+ The adsorption is also the strongest, followed by Example 6, which is better than other groups, showing that the composite adsorption material composed o...

Embodiment 8

[0098] Embodiment 8 nickel ion adsorption experiment

[0099] Take respectively 0.05g of the samples obtained by the compatibility of the above examples 1 to 6, place them in a 500ml wide-mouth conical flask, and in each sample, add a concentration of 100mg / L of Ni 2+ solution. Place the Erlenmeyer flask in a double-layer constant temperature shaker at (25±5)°C, shake at a speed of 150r / min for 12h, take out a 0.45μm microporous filter membrane, and use a flame atomic absorption spectrometer to measure Ni in the filtrate 2+ , and calculate the combined materials of different examples for the Ni in the solution 2+ adsorption capacity and removal rate.

[0100] As can be seen from Table 8, the composite adsorption material of different component proportions is obviously different to the adsorption capacity of nickel ion; Embodiment 1 of the present invention is to Ni ion 2+ The adsorption effect is also the strongest, which is better than other groups, indicating that the compo...

Embodiment 9

[0103] Embodiment 9 Chromium ion adsorption experiment

[0104] Take by weighing each 0.05g of the samples obtained by the compatibility of the above examples 1 to 6 respectively, place them in a 500ml wide-mouth conical flask, and add a concentration of 100mg / L of Cd in each sample. 2+ solution. Place the Erlenmeyer flask in a double-layer constant temperature shaker at (25±5)°C, shake at a speed of 150r / min for 12h, take out a 0.45μm microporous filter membrane, and measure the Cd in the filtrate with a flame atomic absorption spectrometer 2+ , and calculate the combined materials of different examples for the Cd in the solution 2+ adsorption capacity and removal rate.

[0105] As can be seen from Table 9, the composite adsorbents of different component ratios have significantly different adsorption capacities to chromium ions; 2+ The adsorption effect is better than that of other groups, indicating that the composite adsorption material composed of the raw materials in E...

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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 biochar capable of adsorbing heavy metals, a preparation method and application thereof, and belongs to the field of new environmental protection materials. Background technique [0002] Heavy metals such as lead, arsenic, mercury, and copper can enter the human body through the food chain due to their physical toxicity, high biological toxicity, refractory degradation, and persistence, and cause serious impacts on humans, animals and plants through accumulation and amplification. For example, if lead ions exceed the standard, they will invade the human hematopoietic system, nervous tissue and kidneys, causing neurasthenia, erythrocytic anemia, and hypohemoglobin anemia. Copper ions will cause skin necrosis, hemoglobin denaturation, etc., thereby affecting metabolism and causing cardiovascular disease. class of diseases. [0003] At present, there has been a lot of research on the treatment of industrial heavy metal wastewat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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