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Kieselguhr heavy metal absorbent, and preparation method and application thereof

A technology of diatomite and adsorbent, which is applied in the field of diatomite heavy metal adsorbent and its preparation, can solve the problems of low efficiency of diatomite adsorbing heavy metals, etc., and achieve high reuse times, high adsorption capacity and simple preparation method Effect

Inactive Publication Date: 2017-02-15
ZHENGZHOU LIFUAI BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, diatomaceous earth alone has a low efficiency of adsorbing heavy metals. How to simply treat it to improve the efficiency of adsorbing heavy metals is a problem to be solved in this patent.

Method used

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  • Kieselguhr heavy metal absorbent, and preparation method and application thereof
  • Kieselguhr heavy metal absorbent, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0017] In the embodiment of the present invention, a diatomite heavy metal adsorbent is composed of the following raw materials in parts by weight: 27 parts of diatomite, 13 parts of dichloroacetic acid, 2 parts of titanium isopropoxide, and 5 parts of salicylic alcohol.

[0018] Mix dichloroacetic acid with 4.8 times its mass of deionized water to prepare a dichloroacetic acid solution. Mix and grind diatomite and titanium isopropoxide, pass through a 120-mesh sieve, then add dichloroacetic acid solution, raise the temperature to 72°C and ultrasonically treat at this temperature for 32min, the ultrasonic power is 1000W, then add salicyl alcohol dropwise, dropwise After completion, heat up to 112°C and seal and stir at this temperature for 53 minutes, then microwave for 20 minutes with a microwave power of 800W, stir at 99°C until dry, and then calcinate in a muffle furnace at 430°C for 4 hours. get the adsorbent.

[0019] Through repeated experiments, it is obtained that the...

Embodiment 2

[0021] In the embodiment of the present invention, a diatomite heavy metal adsorbent is composed of the following raw materials in parts by weight: 35 parts of diatomite, 21 parts of dichloroacetic acid, 6 parts of titanium isopropoxide, and 12 parts of salicylic alcohol.

[0022] Mix dichloroacetic acid with 4.8 times its mass of deionized water to prepare a dichloroacetic acid solution. Mix and grind diatomite and titanium isopropoxide, pass through a 120-mesh sieve, then add dichloroacetic acid solution, raise the temperature to 72°C and ultrasonically treat at this temperature for 32min, the ultrasonic power is 1000W, then add salicyl alcohol dropwise, dropwise After completion, heat up to 112°C and seal and stir at this temperature for 53 minutes, then microwave for 20 minutes with a microwave power of 800W, then stir until dry at a temperature of 101°C, and then calcinate in a muffle furnace at 430°C for 4 hours. get the adsorbent.

[0023] Through repeated experiments,...

Embodiment 3

[0025] In the embodiment of the present invention, a diatomite heavy metal adsorbent is composed of the following raw materials in parts by weight: 29 parts of diatomite, 15 parts of dichloroacetic acid, 3 parts of titanium isopropoxide, and 7 parts of salicylic alcohol.

[0026] Mix dichloroacetic acid with 4.8 times its mass of deionized water to prepare a dichloroacetic acid solution. Mix and grind diatomite and titanium isopropoxide, pass through a 120-mesh sieve, then add dichloroacetic acid solution, raise the temperature to 72°C and ultrasonically treat at this temperature for 32min, the ultrasonic power is 1000W, then add salicyl alcohol dropwise, dropwise After completion, heat up to 112°C and seal and stir at this temperature for 53 minutes, then microwave for 20 minutes with a microwave power of 800W, then stir at 100°C until dry, and then calcinate in a muffle furnace at 430°C for 4 hours. get the adsorbent.

[0027] Through repeated experiments, it is obtained th...

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Abstract

The invention discloses a kieselguhr heavy metal absorbent, and a preparation method and application thereof. The absorbent is prepared from the following raw materials in parts by weight: 27 to 35 parts of kieselguhr, 13 to 21 parts of dichloroacetic acid, 2 to 6 parts of isopropyl titanate, and 5 to 12 parts of saligenin. The preparation method comprises the following steps of mixing and grinding the kieselguhr and the isopropyl titanate, adding a dichloroacetic acid solution for ultrasonic processing, dropwise adding the saligenin, heating and stirring by sealing, performing microwave processing, stirring until a product is dry, and calcining at a high temperature to obtain the kieselguhr heavy metal absorbent. The absorbent prepared by the method has high adsorption efficiency on heavy metal, and can be reused for 100 times or more. The kieselguhr heavy metal absorbent provided by the invention has high adsorption capacity and fast adsorption rate; the preparation method is simple, and the kieselguhr heavy metal absorbent is subjected to acid treatment after being used so as to recover the heavy metal, is calcined at the high temperature of 450 DEG C so as to be regenerated, and is highly reusable; complete adsorption and desorption are realized, and the heavy metal recovery cost is low; the kieselguhr heavy metal absorbent for treating heavy metal waste water is low in treatment cost and simple in process, does not exist secondary pollution, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of environmental protection materials, in particular to a diatomite heavy metal adsorbent and its preparation method and application. Background technique [0002] At present, there are three main types of heavy metal wastewater treatment methods: chemical reaction removal method, adsorption concentration separation removal method, and microbial or plant removal method. The first category is the removal of heavy metal ions in wastewater through chemical reactions, including neutralization precipitation, sulfide precipitation, ferrite co-precipitation, chemical reduction, electrochemical reduction, and polymer heavy metal collectors; The second category is the method of adsorbing, concentrating, and separating heavy metals in wastewater without changing their chemical form, including adsorption, solvent extraction, evaporation and coagulation, ion exchange, and membrane separation; the third category is by me...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/62
CPCB01J20/22B01J20/14B01J20/223C02F1/28C02F1/281C02F1/285
Inventor 不公告发明人
Owner ZHENGZHOU LIFUAI BIOLOGICAL TECH CO LTD