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Iron oxide loaded biomass carbonized microspheres and preparation method and application thereof

A technology of carbonizing microspheres and biomass, applied in chemical instruments and methods, water pollutants, and other chemical processes, can solve the problems of low comprehensive utilization rate, complicated preparation process, poor adsorption performance, etc., and achieve low comprehensive utilization rate , Stable physical and chemical properties, and improved adsorption effect

Active Publication Date: 2017-05-31
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Adsorption is an important physical and chemical method in the treatment of heavy metal ion wastewater. It has the advantages of wide source of adsorbent, strong plasticity, and simple operation. However, traditional adsorbents such as activated carbon, zeolite, iron oxide, etc. have some shortcomings: the preparation process is complex , high cost, poor adsorption performance or secondary pollution and other issues
[0004] Coconut shell contains a large amount of cellulose and lignin, and is rich in carbon elements. However, most of the coconut shells are discarded at present, and the comprehensive utilization rate is low. Using coconut shells as raw materials, it is modified by ferric sulfate to prepare a product with a large specific surface area and good adsorption performance. The hydrothermal carbonized microspheres loaded with iron oxide are used for the removal of lead and cadmium ions in wastewater, which not only realizes the high-value comprehensive utilization of coconut shell, greatly reduces the production cost of carbon materials, but also provides a preparation for the treatment of heavy metal wastewater A new adsorbent with low cost, strong adsorption performance and environmental friendliness

Method used

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  • Iron oxide loaded biomass carbonized microspheres and preparation method and application thereof
  • Iron oxide loaded biomass carbonized microspheres and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0027] After boiling 80mL of 0.001mol / L CTMAB, add 20mL of 0.025mol / L ferric sulfate solution dropwise, and after cooling, adjust the pH to 9.0 with sodium hydroxide solution. Shred the coconut shells and soak them in liquid nitrogen, then immediately transfer the frozen coconut shells to a mortar and grind them into powder quickly, pass through a 100-mesh sieve, add 1g of coconut shells into the solution, and mix thoroughly with magnetic stirring. The solution was heated and stirred to evaporate to a total volume of about 20 mL, and dried in an oven at 60°C for 24 hours. Place the dried sample in 10 mL of 0.005 mol / L zinc acetate solution, hydrothermal carbonization final temperature is 200°C, time is 8 hours, rinse the product with water and ethanol after cooling, and then dry it in an oven for 24 hours, namely Biomass carbonized microspheres loaded with iron oxide are obtained.

Embodiment 2

[0029] After boiling 80mL of 0.001mol / L CTMAB, add 20mL of 0.05mol / L ferric nitrate solution, and after cooling, adjust the pH to 9.0 with sodium hydroxide solution. Shred the coconut shells and soak them in liquid nitrogen, then immediately transfer the frozen coconut shells to a mortar and grind them into powder quickly, pass through a 100-mesh sieve, add 1g of coconut shells into the solution, and mix thoroughly with magnetic stirring. The solution was heated and stirred to evaporate to a total volume of about 20 mL, and dried in an oven at 60°C for 24 hours. Place the dried sample in 10 mL of 0.005 mol / L zinc acetate solution, hydrothermal carbonization final temperature is 200°C, time is 8 hours, rinse the product with water and ethanol after cooling, and then dry it in an oven for 24 hours, namely Biomass carbonized microspheres loaded with iron oxide are obtained.

Embodiment 3

[0031] Under room temperature condition, be that 11.58, 26.53, 30.29 and 40.96mg / L leaded solution are carried out adsorption reaction with the material that 0.01g embodiment 1 prepares to 20mL concentration respectively, and wherein reaction time is 12 hours, the lead ion concentration in the filtrate is charged with electricity The inductively coupled plasma emission spectrometer measures that the removal rate of the material to lead ions reaches more than 95%.

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Abstract

The invention discloses iron oxide loaded biomass carbonized microspheres and a preparation method and application thereof. The preparation method includes following steps: adding iron salt into a boiling cetyl trimethyl ammonium bromide solution; using a sodium hydroxide solution to adjust pH; adding coconut shell which is frozen, ground and screened by a 100-mesh sieve, stirring for evaporation, and drying at constant temperature; performing hydrothermal carbonization in a zinc acetate solution to obtain the iron oxide loaded carbonized microspheres. The preparation method is simple in process and simple and convenient to operate, the carbonized microspheres are low in cost, stable in physiochemical property, good in performance of adsorbing lead and cadmium in wastewater and free of secondary pollution, and removal rate can reach higher than 92% when the carbonized microspheres are used for treating wastewater containing cadmium ions or lead ions of below 20mg / L.

Description

technical field [0001] The invention relates to biomass carbonized microspheres loaded with iron oxide prepared by using coconut shells and its application in adsorption and removal of lead and cadmium ions in wastewater, belonging to the technical field of carbon material preparation and application. Background technique [0002] Chemical, smelting and processing industries produce a large amount of heavy metal wastewater. Because of their non-degradability and easy accumulation in organisms through the food chain, heavy metals pose a great threat to the environment and human beings. Therefore, how to deeply purify and treat heavy metal wastewater has become a become an urgent task at present. [0003] Adsorption is an important physical and chemical method in the treatment of heavy metal ion wastewater. It has the advantages of wide source of adsorbent, strong plasticity, and simple operation. However, traditional adsorbents such as activated carbon, zeolite, iron oxide, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20C02F1/28B01J20/30C02F101/20
CPCB01J20/06B01J20/20C02F1/283C02F2101/20
Inventor 杨卫春柴立元周妍琦刘礼彪王云燕王海鹰廖骐唐崇俭李青竹
Owner CENT SOUTH UNIV
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