Magnetic biochar material for heavy metal waste water treatment and preparation method of magnetic biochar material
A biochar, heavy metal technology, applied in the directions of alkali metal compounds, water/sewage treatment, adsorbed water/sewage treatment, etc., can solve the problems of difficult solid-liquid separation and difficult recycling of materials, and achieve good photocatalytic performance and excellent adsorption. Effects, effects that are easy to mass produce
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Embodiment 1
[0020] A magnetic biochar material of the present invention is characterized in that the crosslinked chitosan gel is used as a carrier, and the gel is evenly loaded with magnetic BiFeO 3 Materials and molecules of kenaf biochar with high porosity. The magnetic biochar material is prepared by the following method:
[0021] (1) Weigh 0.08mol of ferric nitrate, 0.08mol of bismuth nitrate and 0.08mol of citric acid, the ratio is 1:1:1, dissolve the weighed solid ferric nitrate and bismuth nitrate in 200mL of ethylene glycol methyl Add 0.2 mL of nitric acid solution with a molar concentration of 0.1 mol / L to the ether, dissolve the weighed citric acid in 100 mL of ethylene glycol, mix the two solutions evenly, place the container containing the mixed solution in water at a temperature of 60°C Heating in a water bath for 1 hour, the obtained black solution was heated at a temperature of 100°C for 10 hours to obtain a light brown gel, which was put into a crucible and placed in a mu...
Embodiment 2
[0026] The magnetic biochar material of the present invention is used to remove hexavalent chromium ions in wastewater, comprising the following steps:
[0027]Take five parts of wastewater with a mass concentration of hexavalent chromium ions of 50mg / L, each with a volume of 50mL, put them in a clean Erlenmeyer flask, and adjust the pH to 2, 4, 6, 8, 10 with hydrochloric acid and sodium hydroxide solution, respectively. After labeling, the magnetic biochar material prepared in Example 1 is added to the waste water sample, and the dosage of the material in every liter of waste water is 4g, and the sealed Erlenmeyer flask is placed in a rotating speed of 150rpm as a reactor. In the constant temperature oscillation box, the temperature in the box was maintained at 30°C, and after 4 hours of oscillation reaction, the material was separated from the solution with a magnet, and the adsorption treatment of hexavalent chromium ions in the wastewater sample was completed. Adopt diphen...
Embodiment 3
[0032] The magnetic biochar material of the present invention is used to remove hexavalent chromium ions in wastewater, comprising the following steps:
[0033] Get three parts of hexavalent chromium concentration and be respectively 10mg / L, 50mg / L, 100mg / L waste water test solution, be placed in clean Erlenmeyer flask, adjust pH to be 2 with hydrochloric acid solution, after labeling is finished, embodiment 1 is made The magnetic biochar material is added to the wastewater sample, and the dosage of the material per liter of wastewater is 4g. The sealed Erlenmeyer flask is used as a reactor and placed in a constant temperature oscillation box with a rotation speed of 150rpm, and the temperature in the box is maintained at 30°C, oscillating for 4 hours and then using a magnet to separate the material from the solution to complete the adsorption treatment of hexavalent chromium ions in the wastewater sample. Adopt diphenylcarbazide spectrophotometry to measure the amount of unad...
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