Method for preparing bio-adsorbent by taking rice bran as raw material
A biosorbent and rice bran technology, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of low added value of products and environmental pollution, and achieve the effects of superior adsorption performance, reduced environmental risks, and small investment
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Embodiment 1
[0028] A method for preparing a biosorbent by using rice bran. Firstly, rice bran, an agricultural by-product, is selected as a raw material, and the specific preparation steps are as follows:
[0029] 1. Pretreatment: The rice bran is taken from a rural rice processing factory. First, it is manually screened to remove a small amount of large particle size impurities. The rice bran is washed repeatedly with tap water, and then washed repeatedly with distilled water and deionized water. Dry down to constant weight, then pulverize and sieve, and keep the samples between 40-60 mesh.
[0030] 2. Alkali treatment: Weigh 100 g of the original rice bran prepared in step 1, place it in a 1000 mL conical flask, add 1000 ml of NaOH solution with a mass concentration of 2% (solid-to-liquid ratio is 1:10), shake well and soak at room temperature for 24 hours, shaking once every 2 hours.
[0031] The alkali-treated rice bran was vacuum-filtered, washed repeatedly with deionized water unti...
Embodiment 2
[0036] A method for preparing a biosorbent by using rice bran. Firstly, rice bran, an agricultural by-product, is selected as a raw material, and the specific preparation steps are as follows:
[0037] 1. Pretreatment: The rice bran is taken from a rural rice processing factory. First, it is manually screened to remove a small amount of large particle size impurities. The rice bran is washed repeatedly with tap water, and then washed repeatedly with distilled water and deionized water. Dry down to constant weight, then pulverize and sieve, and keep the samples between 40-60 mesh.
[0038] 2. Alkali treatment: Weigh 100 g of the original rice bran prepared in step 1, place it in a 1000 mL conical flask, add 1000 ml of NaOH solution with a mass concentration of 8% (solid-to-liquid ratio is 1:10), shake well and soak at room temperature for 24 hours, shaking once every 2 hours.
[0039] The alkali-treated rice bran was vacuum-filtered, washed repeatedly with deionized water unti...
Embodiment 3
[0044] A method for preparing a biosorbent by using rice bran. Firstly, rice bran, an agricultural by-product, is selected as a raw material, and the specific preparation steps are as follows:
[0045] 1. Pretreatment: The rice bran is taken from a rural rice processing factory. First, it is manually screened to remove a small amount of large particle size impurities. The rice bran is washed repeatedly with tap water, and then washed repeatedly with distilled water and deionized water. Dry down to constant weight, then pulverize and sieve, and keep the samples between 40-60 mesh.
[0046] 2. Alkali treatment: Weigh 100 g of the original rice bran prepared in step 1, place it in a 1000 mL conical flask, add 1000 ml of NaOH solution with a mass concentration of 2% (solid-to-liquid ratio is 1:10), shake well and soak at room temperature for 24 hours, shaking once every 2 hours.
[0047] The alkali-treated rice bran was vacuum-filtered, washed repeatedly with deionized water until ...
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