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Heavy metal ion adsorbent, preparation method and application

A technology of heavy metal ions and adsorbents, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high cost, large amount of medicine required, and low removal efficiency of heavy metals , to achieve the effect of low cost, good adsorption performance and good adsorption effect

Active Publication Date: 2016-11-09
郑州普利飞尔环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above two methods belong to biological methods, the removal efficiency of heavy metals is not very high, the amount of medicine required is large, and the cost is high

Method used

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  • Heavy metal ion adsorbent, preparation method and application
  • Heavy metal ion adsorbent, preparation method and application
  • Heavy metal ion adsorbent, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A Graphene@Fe 3 o 4 @MgO·SiO 2 The preparation method of composite particles is carried out in the following steps:

[0046] (1) Add 200mL mass fraction of 3% nano ferric oxide aqueous solution, 500mL mass fraction of 5% magnesium chloride solution, 500mL mass fraction of 5% water glass in the reactor with heating, stirring and strong ultrasonic device (the proportioning ratio of quartz sand and alkali is 1:1) solution and 100mL mass fraction are 1% graphene solution, in the solution adding process, reaction device keeps strong ultrasonic and rapid stirring, then the solution is heated to 50 ℃, wherein Stirring speed is 1500RMP, ultrasonic frequency is 80MHz; co-precipitation produces graphene@Fe 3 o 4 @MgO·SiO 2 Composite particles;

[0047] (2) Wash the mixture obtained in step (1) by filtration, collect the filter residue, dry the obtained filter residue at 80° C., and then fully grind the obtained filter residue until it is powdery.

Embodiment 2

[0049] A Graphene@Fe 3 o 4 @MgO·SiO 2 The preparation method of composite particles, the preparation method is the same as in Example 1, the difference is only that: the raw material is 200mL mass fraction of 3% nano iron ferric oxide aqueous solution, 500mlL mass fraction is 6% magnesium chloride solution, 500mL mass fraction is 3% water The glass (quartz sand and alkali ratio is 2:1) solution and 100mL graphene solution with a mass fraction of 1%, the co-precipitation temperature is 40°C.

Embodiment 3

[0051] A Graphene@Fe 3 o 4 @MgO·SiO 2 The preparation method of the composite particles, the preparation method is the same as in Example 1, the difference is only that: the raw material is 200mL mass fraction of 4% nano iron ferric oxide aqueous solution, 500mL mass fraction is 7% magnesium chloride solution, 500mL mass fraction is 7% water The glass (quartz sand and alkali ratio is 2:1) solution and 100mL graphene solution with a mass fraction of 1%, the co-precipitation temperature is 60°C.

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Abstract

The invention provides a heavy metal ion adsorbent, a preparation method and application. The heavy metal ion adsorbent is prepared by mixing, by weight, 5-10 parts of graphene@Fe3O4@MgO.SiO2 composite particles, 10-25 parts of trithiocyanuric acid trisodium salt, 5-15 parts of hydroxide and 50-80 parts of deionized water. The composite particles are prepared from nano-iron oxide, graphene, magnesium salt and sodium silicate through a coprecipitation method. According to the adsorbent, heavy metal ions can be captured in a chemical chelation mode and then enriched in a physical absorption mode, a relatively stable structure can be rapidly formed, and the metal ions can be immobilized and prevented from being released to the environment; besides, the adsorbent can be treated in a burying mode, and secondary pollution to the environment can be avoided.

Description

technical field [0001] The invention belongs to the technical field of water purification, and in particular relates to a heavy metal ion adsorbent, a preparation method and an application. Background technique [0002] In the field of environment and human health, heavy metals mainly refer to mercury (Hg), cadmium (Cd), lead (Pb), chromium (Cr), arsenic (As), manganese (Mn), copper (Cu), zinc (Zn), Cobalt (Co), nickel (Ni) and other heavy metals. With the development of my country's economy and society, the shortage of water resources and water pollution are becoming more and more serious. Heavy metals are one of the main pollutants in the water environment. Relevant statistics show that my country's metal wastewater accounts for about 10% of the total wastewater discharge, mainly from electroplating, circuit boards, mining, metallurgy, chemical industry and other industries, which are potentially harmful. In particular, heavy metals such as mercury, cadmium, lead, and chr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22C02F1/28B01J20/30C02F101/20C02F101/22
CPCB01J20/041B01J20/06B01J20/103B01J20/20B01J20/223C02F1/283C02F1/285C02F2101/20C02F2101/206C02F2101/22
Inventor 董凤良王征刘腾蛟王永强苏磊
Owner 郑州普利飞尔环保科技有限公司
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