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Method for preparing heavy metal adsorbent by using modified bagasse

A technology of bagasse and heavy metals, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as soil fertility failure and destruction of ecological balance, and achieve reduction of secondary pollution, Low cost, low price effect

Inactive Publication Date: 2011-10-19
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The consequence of such utilization is to destroy the ecological balance, deplete the soil fertility, and cause a vicious circle in agriculture.

Method used

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  • Method for preparing heavy metal adsorbent by using modified bagasse

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] After the bagasse is dried, it is crushed and passed through a 20-40 mesh sieve to obtain the bagasse powder. The bagasse powder is immersed in a potassium permanganate solution with a concentration of 1.0 g / L, stirred evenly, and nitrogen and oxygen are removed. React for 60 minutes, add acrylonitrile and N,N,-methylenebisacrylamide, pass nitrogen to remove oxygen again, react at 55°C for 57 minutes, add hydroquinone solution with a concentration of 10mg / L, and continue to react for 3 minutes , to obtain a reactant, the reactant was first washed with deionized water for 3 times, and then washed with 95% ethanol for 3 times, and then dried, filtered and dried to obtain the crude product of the heavy metal adsorbent. Among the above, the addition amounts of acrylonitrile, N, N,-methylenebisacrylamide and hydroquinone solution are respectively 0.2%; 2%; 0.075% of the weight of bagasse powder.

Embodiment 2

[0024] Example 2: The crude product of the heavy metal adsorbent was obtained according to the method of Example 1, and the crude product of the heavy metal adsorbent was extracted with N,N,-dimethylformamide at 140°C for 36 hours, and then used to remove Washing with deionized water for 3 times, and then washing with 95% ethanol for 3 times, draining and drying to obtain the fine product of the heavy metal adsorbent.

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Abstract

The invention provides a method for preparing a heavy metal adsorbent by using modified bagasse. The method comprises the following steps of: a. stoving or drying the bagasse, and then crushing and sieving so as to obtain bagasse powder; b. immersing the bagasse powder in a potassium permanganate solution with the concentration of (0.8 to 1.2) g / L, uniformly stirring, importing nitrogen and removing oxygen, and reacting for 40 to 80 minutes at the temperature of 40 DEG C to 70 DEG C; d. then adding acrylonitrile and N, N,-methylenediacrylamide, importing nitrogen and removing oxygen again, and reacting for 40 to 80 minutes at the temperature of 40 DEG C to 70 DEG C; e. in the step d, adding a hydroquinone solution with the concentration of (8 to 12) mg / L 2 to 5 minutes before the reaction is finished; and f. washing a reactant, draining, filtering and drying so as to obtain a heavy metal adsorbent crude product, wherein the addition amounts of the acrylonitrile, the N, N,-methylenediacrylamide and the hydroquinone solution respectively account for 0.1% to 0.3%, 1% to 3%, 0.05% to 0.1% of the weight of the bagasse powder. The adsorbent prepared with the method has the advantages of simple using method, low cost and excellent adsorption effect.

Description

technical field [0001] The invention relates to a preparation method of a heavy metal adsorbent, in particular to a preparation method of a modified bagasse heavy metal adsorbent. Background technique [0002] Heavy metals refer to metals with a specific gravity greater than 4 or 5, and there are about 45 kinds. The usual heavy metal pollution mainly refers to the environmental pollution of heavy metals with significant biological toxicity such as mercury, lead, cadmium, chromium, and arsenic, and also includes heavy metals with certain toxicity such as Zinc, copper, cobalt, nickel, tin, vanadium, etc. Heavy metal pollutants are difficult to control. When they accumulate to a certain limit in the water body, they will cause serious harm to the water body-aquatic plant-aquatic animal system, and may affect human health through the food chain. Heavy metal pollution in water has become one of the most serious environmental problems in the world today. At present, the methods ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
CPCY02W10/37
Inventor 牛显春周建敏党志郑刘春杨思敏
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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