Preparation of magnetic adsorbent efficiently removing polycyclic aromatic hydrocarbon with xanthoceras sorbifolia bunge shell being raw material
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A technology of magnetic adsorbent and Wenguan nut shell, applied in the field of activated carbon, can solve problems such as affecting the nutritional value of edible oil, and achieve the effects of low price, cost saving and large specific surface area.
Active Publication Date: 2017-02-22
HENAN UNIVERSITY OF TECHNOLOGY
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If the pore size is too large, it is easy to absorb oil molecules and nutrients (such as sterols, oryzanol, etc.) in edible oil, which will affect the nutritional value of edible oil
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Embodiment 1
[0019] (1) Weigh 800 g of radix radix radiata husks, crush them, pass through a 100-mesh sieve, and wash with distilled water for 40 minutes under stirring until the washing liquid is neutral. Put the washed radishes radix radiata husks in an oven at 105 ℃ Dry and set aside.
[0020] (2) Take the washed and dried radix radix radiata shells and put them into a crucible, and pre-carbonize them in a muffle furnace (250 °C) for 1 h;
[0021] (3) Add 0.5% NaOH (alkali-carbon ratio: 4:1) to the pre-carbonized radix sorbifolia husk, boil and stir for 4 hours, filter with hot water at 80°C until the lotion is neutral, and place in an oven dry and ready for use;
[0022] (4) Add 4.05g FeCl to the flask 3 ·6H 2 O and 2.78g FeSO 4 ·7H 2 O, add 100mL of distilled water to dissolve, add 6.83g of Xantho sorbifolia husk ash prepared in step (3), then add 2mol / L NaOH lye dropwise to make the system pH = 7, heat to 80°C, and react for 4 h; after the reaction, The precipitate was separate...
Embodiment 2
[0025](1) Weigh 600 g of radix radiata husks, crush them, pass through a 100-mesh sieve, and wash with distilled water for 30 minutes under stirring until the washing liquid is neutral. 105°C) for drying.
[0026] (2) Take the washed and dried radix radix radix radiata husks and put them into a crucible, and pre-carbonize them in a muffle furnace (250 °C) for 1 hour;
[0027] (3) Take the pre-carbonized radix radix radiata shell, add 0.5% KOH (the ratio of alkali to carbon is 4:1), boil and stir for 4 hours, filter with hot water at 80°C until the lotion is neutral, and place in an oven Ready to use after drying
[0028] (4) Add 8.08g Fe(NO 3 ) 3 9H 2 O and 1.98gFeCl 2 4H 2 O, add 100mL of distilled water to dissolve, add 10.06g of Xanthania sorbifolium husk ash prepared in step (3), then add dropwise 2mol / L KOH lye to make the system pH = 7, heat to 80°C, and react for 4 hours; after the reaction, The precipitate was separated by filtration, washed several times with ...
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Abstract
The invention discloses a preparing method of a magnetic adsorbent efficiently removing polycyclic aromatic hydrocarbon with xanthoceras sorbifolia bunge shell being a raw material. The preparing method comprises the steps of conducting pretreatments such as impurity removing, pre-carbonization and alkali dissolution silica removing; matching Fe2+salt and Fe3+salt into a solution and mixing the Fe2+salt and the Fe3+salt in proportion; adding pretreated xanthocaras sorbifolia bunge shell ash alkaline precipitation according to a mass ratio of xanthoceras sorbifolia bunge shell ash to Fe ion, and obtaining xanthoceras sorbifolia bunge shell radical magnetic adsorbent after washing the xanthocaras sorbifolia bunge shell ash alkaline precipitation. According to the preparing method of the magnetic adsorbent efficiently removing the polycyclic aromatic hydrocarbon with the xanthoceras sorbifolia bunge shell being the raw material, preparation of an activated carbon material from the xanthoceras sorbifolia bunge shell is easy, waste utilization of the xanthoceras sorbifolia bunge shell is achieved. Xanthoceras sorbifolia bunge shell activated carbon prepared through modifying of magnetofluid has a large specific surface area and a small aperture and can simultaneously adsorb pigment, benzopyrene, polycyclic aromatic hydrocarbon and the like in fats, and the adsorption rate reaches to 99% or above.
Description
technical field [0001] The invention relates to a method for preparing a magnetic adsorbent for efficiently removing polycyclic aromatic hydrocarbons from sorbifolia husks as a raw material. The product has a strong adsorption effect on pigments and polycyclic aromatic hydrocarbons in edible oils. The invention belongs to activated carbon technology In particular, it relates to a method for preparing a magnetic adsorbent for efficiently removing polycyclic aromatic hydrocarbons in edible oil by using sorbifolia husk as a raw material. Background technique [0002] Xinguo is a rare woody oil crop unique to my country. It has a well-developed root system, strong adaptability, salt and alkali resistance, and cold resistance. It can grow normally in grasslands, wastelands, mountains, and ravines. Excellent tree species for desertification are also widely planted in gardens and roadside green belts as ornamental tree species. In recent years, because of its high industrial value ...
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