Biochar prepared from straw and lignin and application of biochar in heavy metal pollution treatment
A technology of straw biomass and biochar is applied in the restoration of polluted soil, water pollutants, adsorbed water/sewage treatment, etc. It can solve the problem of lack of long-term fixation of heavy metal pollution to study the effective lead content of soil, and achieve low cost, low cost and low cost. The effect of good adsorption performance and strong practicability
Inactive Publication Date: 2021-04-23
SOUTHWEAT UNIV OF SCI & TECH
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Problems solved by technology
[0012] Soil conservation - 7 days, lack of long-term immobilization research on heavy metal pollution remediation and research on effective lead content in soil
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0038] In order to make the object, technical solution and advantages of the present invention clearer, the following examples are given to further describe the present invention in detail.
[0039] Study on the adsorption performance of kraft lignin biochar on Cr(Ⅵ);
[0040] Preparation of Kraft Lignin Biochar Biochar
[0041] Put the industrial kraft lignin in a ceramic boat with a cover, and place the porcelain boat in a muffle furnace (Tianjin Taisite Instrument Co., Ltd., SX-5-12) to raise the temperature to 400, 500, 600, 700°C Pyrolysis with lower limit oxygen for 2 hours, naturally cooled to room temperature, taken out, washed with deionized water to remove soluble impurities after cooling, dried overnight in a 60°C drying oven, and labeled biochar samples as L400, L500, L600, L700, packed in bags and sealed in a desiccator for later use.
[0042] Characterization of kraft lignin biochar
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Abstract
The invention discloses biochar prepared from straw and lignin and application of the biochar in heavy metal pollution treatment. A preparation method of the straw biochar comprises the steps that straw is dried, smashed and pyrolyzed after being smashed, the biochar is prepared, and the biochar is ground. The straw biochar is applied to heavy metal contaminated soil. The preparation method of the lignin biochar comprises the steps of washing sulfate lignin with deionized water, drying, pyrolyzing, carbonizing, washing to remove soluble impurities, and drying. The sulfate lignin biochar is used for heavy metal contaminated water. The method has the advantages that the lignin sulfate and the straw are selected as biomass sources, and the raw material sources are wide; and the method is simple in process, free of secondary pollution, low in cost, good in adsorption performance, capable of being repeatedly used and high in practicability, and resource utilization of industrial waste is achieved.
Description
technical field [0001] The invention relates to the technical field of remediation of heavy metal pollution, in particular to the preparation of straw and kraft lignin biochar and its application in remediation of heavy metal polluted water and soil. Background technique [0002] In recent years, due to the rapid development of industrialization, the manufacture of chemicals, the development of minerals, the discharge of waste water in daily life, the leakage of waste batteries, and the use of agricultural pesticides and fertilizers, etc., will lead to an increase in the content of heavy metals in the soil. . The degree of soil heavy metal pollution is deepening, and the threat to crops, animals and plants, and even human beings is increasing, which has gradually attracted people's attention and attention. According to the "National Soil Pollution Survey Bulletin", the overall rate of exceeding the standard in the country is 16.1%, and the number of points exceeding the sta...
Claims
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IPC IPC(8): B01J20/20B01J20/30C02F1/28B09C1/00C02F101/22
Inventor 胡玉黎先发肖雪凌梦
Owner SOUTHWEAT UNIV OF SCI & TECH