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Preparation method and application of calcium carbonate and biomass charcoal composite material

A technology of biochar and composite materials, applied in the field of arsenic-contaminated soil remediation, can solve problems such as adverse health effects, and achieve the effects of easy operation, reduced production costs, and good fixation effect

Inactive Publication Date: 2021-12-14
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chronic exposure to inorganic arsenic is known to have adverse health effects

Method used

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  • Preparation method and application of calcium carbonate and biomass charcoal composite material
  • Preparation method and application of calcium carbonate and biomass charcoal composite material
  • Preparation method and application of calcium carbonate and biomass charcoal composite material

Examples

Experimental program
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Embodiment

[0016] (1) Peel the mulberry stems, break them into blocks, grind them into powder with a universal grinder, pass through a 20-mesh sieve, and dry them in an oven at 55° C. to obtain mulberry stem powder.

[0017] (2) Mix the mulberry rod powder and calcium carbonate obtained in step (1) evenly with a mass ratio of 4:1, put them into a crucible, then put them into a muffle furnace, and heat up to 400°C at a rate of 5°C / min , keep it for 2 hours, take it out when the temperature drops to room temperature, grind it, and pass it through a 100-mesh sieve to get the calcium carbonate biochar composite material.

[0018] Weigh 1 g of the calcium carbonate biochar composite material prepared in this example and 9 g of arsenic-contaminated soil (the arsenic content is 603.1 mg / kg), mix them uniformly and place them in a 50 mL plastic centrifuge tube. Add ultrapure water at a solid-to-liquid ratio of 1:2, and then add proclin300 with a mass percent concentration of 0.02% to limit the m...

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Abstract

The invention discloses a preparation method and application of a calcium carbonate and biomass charcoal composite material. The preparation method comprises the following steps: (1) peeling mulberry stems, crushing the mulberry stems into blocks, crushing the blocks into powder by using a universal crusher, sieving the powder by using a 20-mesh sieve, and drying the powder in a drying oven at 50-70 DEG C to obtain mulberry stem powder; and (2) uniformly mixing the mulberry stem powder obtained in the step (1) with calcium carbonate powder according to a mass ratio of 7: 1 to 3: 1, putting the mixture into a crucible, putting the crucible into a muffle furnace, heating to 400-600 DEG C at a speed of 5 DEG C / min, keeping for 2 hours, cooling, taking out after the temperature is reduced to room temperature, grinding, and sieving with a 100-mesh sieve to obtain the calcium carbonate and biomass charcoal composite material. The method is easy to operate and low in cost; and the obtained calcium carbonate and biomass charcoal composite material is applied to remediation of arsenic-polluted soil.

Description

technical field [0001] The invention relates to a preparation method and application of a calcium carbonate bio-char composite material. The calcium carbonate bio-char composite material is prepared by using discarded mulberry stalks as the main raw material and applied to the restoration of arsenic-contaminated soil. Background technique [0002] Nowadays, with the rapid development of social economy, the ensuing environmental problems are becoming more and more serious. According to statistics, 150 million people around the world are facing the threat of endemic arsenic poisoning. China is also one of the countries most seriously affected by arsenic poisoning. In China's Taiwan, Xinjiang, Inner Mongolia, Shanxi and other provinces, the problem of high arsenic groundwater irrigation has also caused considerable area of ​​farmland pollution. Hunan, Hubei, Guangxi, Yunnan and other provinces also have large areas of moderate or severe arsenic pollution in soil due to mining...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/06
CPCC09K17/06
Inventor 梁美娜芦琳朱义年李净溪阮麟乔曹海燕
Owner GUILIN UNIVERSITY OF TECHNOLOGY