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A preparation method of a modified pineapple peel magnetic adsorption material and a method for removing heavy metals in wastewater

A magnetic adsorption material, pineapple peel technology, applied in adsorption water/sewage treatment, alkali metal compound, metallurgical wastewater treatment and other directions, can solve the problems of low removal efficiency, high price, difficult recycling, etc., and achieve high treatment efficiency and low cost. , The effect of overcoming the difficulties of recycling

Active Publication Date: 2018-02-02
BAOJI UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the existing problems of high cost, high price, low removal efficiency and difficult recovery in existing heavy metal wastewater treatment materials, the first object of the present invention is to provide a method for preparing a modified pineapple peel magnetic adsorption material, and to use the adsorption Material adsorption and removal method for heavy metals in wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Preparation and Application of Modified Pineapple Peel Magnetic Adsorption Material

[0024] 1. Chemical and physical modification of pineapple peel: After the collected pineapple peel is washed, dried and crushed through an 80-mesh sieve, 2kg of pineapple peel powder is weighed, and water is added according to the mass ratio of pineapple peel powder and water about 1:4 , so that it is completely submerged and guaranteed to be in a fluid state, add 1% HNO 3 Adjust the pH to 3, shake at about 200 rpm at room temperature for 4 hours, then centrifuge alternately with water and ethanol until neutral, dry at 70°C, and store in a muffle furnace at 500°C under nitrogen protection. After activation for 2 hours, the intermediate of pineapple peel was obtained.

[0025] 2. Magnetic loading and modification: After adding an appropriate amount of water into the reaction vessel, press the molar ratio of ferrous salt to iron in the iron salt to be 1.2:2 (the mass ratio of...

Embodiment 2

[0028] Example 2: Preparation and Application of Modified Pineapple Peel Magnetic Adsorption Material

[0029] 1. Chemical and physical modification of pineapple peel: After the collected pineapple peel is washed, dried and crushed through an 80-mesh sieve, 2kg of pineapple peel powder is weighed, and water is added according to the mass ratio of pineapple peel powder and water about 1:4 , so that it is completely submerged and guaranteed to be in a fluid state, add 1% HNO 3 Adjust the pH to 3, shake at about 200 rpm at room temperature for 4 hours, then centrifuge alternately with water and ethanol until neutral, dry at 70°C, and store in a muffle furnace at 500°C under nitrogen protection. After activation for 2 hours, the intermediate of pineapple peel was obtained.

[0030] 2. Magnetic loading and modification: After adding an appropriate amount of water into the reaction vessel, press the molar ratio of ferrous salt to iron in the iron salt to be 1.2:2 (the mass ratio of...

Embodiment 3

[0033] Example 3: Preparation and Application of Modified Pineapple Peel Magnetic Adsorption Material

[0034] 1. Chemical and physical modification of pineapple peel: After the collected pineapple peel is washed, dried and crushed through an 80-mesh sieve, 2kg of pineapple peel powder is weighed, and water is added according to the mass ratio of pineapple peel powder and water about 1:4 , so that it is completely submerged and guaranteed to be in a fluid state, add 1% HNO 3 Adjust the pH to 3, shake at about 200 rpm at room temperature for 4 hours, then centrifuge alternately with water and ethanol until neutral, dry at 70°C, and store in a muffle furnace at 500°C under nitrogen protection. After activation for 2 hours, the intermediate of pineapple peel was obtained.

[0035] 2. Magnetic loading and modification: After adding an appropriate amount of water into the reaction vessel, press the molar ratio of ferrous salt to iron in the iron salt to be 1.2:2 (the mass ratio of...

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Abstract

The invention discloses a preparation method of a modified pineapple peel magnetic adsorption material and a method for removing heavy metals in waste water. The pineapple peel powder is chemically modified by adding a modifying agent in a certain proportion to enhance its adsorption performance, and after it is loaded with magnets, an excellent heavy metal adsorption magnetic material is obtained. Add the obtained magnetic adsorption material into the waste water containing heavy metal in proportion, keep the pH and stir the adsorption reaction under acidity for a certain period of time, and then use the magnet to recover the adsorption material. The method of the invention is simple and feasible, has significant and stable removal effect on heavy metals in water, is convenient to recycle, has no secondary pollution, achieves the purpose of pollution control by waste, and solves the problem of disposal of waste pineapple peels to a certain extent while reducing treatment costs .

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for preparing a magnetic adsorption material by modifying pineapple peel, and a method for adsorbing and removing heavy metals in wastewater by using the adsorption material. Background technique [0002] Industrial wastewater such as electroplating wastewater, dye wastewater, tannery wastewater, and metallurgical wastewater contains a variety of heavy metal ions. These wastewater pass through the food chain and are easily enriched in organisms, endangering human health. Therefore, the pollution of heavy metal wastewater has become more and more popular. Pay attention to. [0003] The methods for treating heavy metal wastewater can be classified into three categories: chemical method, physical chemical method and biological method. Among them, chemical methods include neutralization precipitation method, sulfide precipitation method, ferrite pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20C02F101/22C02F103/16
CPCB01J20/24B01J20/28009C02F1/286C02F2101/20C02F2101/22C02F2103/16
Inventor 范拴喜周旗刘通通罗静
Owner BAOJI UNIV OF ARTS & SCI
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