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Adsorption plate used for soil heavy metal cadmium adsorption and preparation method thereof

An adsorption plate and heavy metal technology, applied in the field of pollution ecological restoration, can solve the problems affecting the comprehensive utilization value of peanuts, waste of resources, etc., and achieve the effects of good research value and application prospect, high preparation efficiency and simple production process.

Active Publication Date: 2014-09-17
HANGZHOU NORMAL UNIVERSITY
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  • Abstract
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Problems solved by technology

[0003] The production of peanuts in our country is abundant and cheap. The total annual output of peanuts is more than 14500kt, and the annual output of peanut shells is nearly 4000kt, accounting for about 28% of the weight of peanuts. A large number of peanut shells are discarded as fuel or waste, which directly affects The comprehensive utilization value of peanuts is reduced, resulting in a waste of resources

Method used

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  • Adsorption plate used for soil heavy metal cadmium adsorption and preparation method thereof

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Embodiment 1

[0016] Embodiment 1 A kind of preparation method of the adsorption plate that is used for soil heavy metal cadmium adsorption, comprises the following steps:

[0017] (1) Rinse the peanut shells with deionized water, and then dry them in a drying oven at 40-60°C. Finally, crush the peanut shells with a grinder and sieve them through a 40-mesh standard sieve to obtain peanut shell particles and divide them into equal parts. Two parts, one part evenly sprinkled in a square cylinder mold with pillars, the square cylinder mold includes a bottom surface and a side cylinder perpendicular to the bottom surface and sealed with the edge of the bottom surface, the bottom surface is rectangular, the length is 30cm, and the width 20cm, the bottom surface and the side cylinder form a hollow square inner cavity, the height of the inner cavity is 2cm, 15 columns parallel to each other and perpendicular to the bottom surface are evenly distributed on the bottom surface of the inner cavity, the...

Embodiment 2

[0021] Embodiment 2 An application of an adsorption plate for soil heavy metal cadmium adsorption, comprising the following steps:

[0022] (1) Rinse the peanut shells with deionized water, and then dry them in a drying oven at 40-60°C. Finally, crush the peanut shells with a grinder and sieve them through a 40-mesh standard sieve to obtain peanut shell particles and divide them into equal parts. Two parts, one part is evenly sprinkled in the square cylinder mold (same as embodiment 1) that is arranged with pillars, and the other part is stored in a dry and clean glass bottle;

[0023] (2) Sodium alginate particles are dissolved in deionized water at a temperature of 20-40°C, stirred to obtain a sodium alginate solution, wherein the mass fraction of sodium alginate is 10%;

[0024] (3) Slowly add the sodium alginate solution into the mold sprinkled with peanut shell particles, and sprinkle another portion of peanut shell particles evenly on the sodium alginate homogenate, the ...

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Abstract

The invention discloses an adsorption plate used for soil heavy metal cadmium adsorption and a preparation method thereof, and the preparation method is as follows: peanut shells are cleaned, dried, crushed into granules to obtain peanut shell particles, sodium alginate and the peanut shell particles are taken in the mass ratio of 2:3, the sodium alginate is added into deionized water to prepare a sodium alginate solution with the mass fraction of 10%, half of the peanut shell particles are evenly spread into a hollow cylinder mold with an inner cavity, then the sodium alginate solution is added into the mold, the rest half of the peanut shell particles are evenly spread on to the sodium alginate solution, and finally the mold is frozen for shaping at the temperature of-20 DEG C, and then is demoulded to prepared the sodium alginate and peanut shell particle adsorption plate. The adsorption plate can effectively absorb and fix heavy metal element cadmium in soil, and the adsorption capacity of heavy metal cadmium in the soil reaches 5mg / g. The soil heavy metal adsorption plate can be widely applied to repair of heavy metal cadmium polluted soil.

Description

technical field [0001] The invention relates to an adsorption plate used for adsorption of heavy metal cadmium in soil, and belongs to the technical field of pollution ecological restoration. Background technique [0002] In recent years, soil heavy metal pollution has become the focus of social attention. The main causes of soil heavy metal pollution are: atmospheric dust, sewage discharge, implementation of pesticides and fertilizers, and so on. The main characteristics of soil heavy metal pollution are: pervasiveness and extensiveness, concealment and latentness, irreversibility and long-termness. Facing the increasing problem of soil heavy metal pollution, there have been a large number of related literature reports on soil remediation technology, mainly including three aspects: biological remediation, physical remediation and chemical remediation. In the promotion and implementation of existing related technologies, there are generally problems such as high input cost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30B09C1/00
Inventor 张杭君周根娣董鸣李文兵贾秀英
Owner HANGZHOU NORMAL UNIVERSITY
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