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Magnetic modified zeolite material for removing nickel through adsorption, and preparation method and application thereof

A modified zeolite and magnetic technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of ineffective adsorption of active hydroxyl groups, high requirements for reaction conditions, and poor hygiene and safety. Achieve the effects of saving precipitation time, easy coalescence and precipitation, and low cost

Active Publication Date: 2016-10-26
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there have been reports on the preparation of magnetically modified zeolite (a preparation method of magnetic zeolite, application number 201510222596.4). The preparation process uses high-temperature and high-pressure reactors and toxic excipients such as ethylenediamine. The reaction conditions are high and the process is complicated. And hygienic safety is poor; Also have report (a kind of magnetic zeolite and its preparation method and application, application number 201510157695.9) realize zeolite and Fe only by physical action 2 o 3 Simple combination of FeO, but the binding force of this method is limited, and the adsorption performance of active hydroxyl groups cannot be effectively exerted

Method used

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  • Magnetic modified zeolite material for removing nickel through adsorption, and preparation method and application thereof
  • Magnetic modified zeolite material for removing nickel through adsorption, and preparation method and application thereof
  • Magnetic modified zeolite material for removing nickel through adsorption, and preparation method and application thereof

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Embodiment 1

[0041] (1) The preparation of magnetically modified zeolite materials, the technological process is as follows figure 2 shown, including the following steps:

[0042] (1) Select natural clinoptilolite, mechanically pulverize, 100-150 mesh sieved, and wash with distilled water. -1 Soak in NaOH solution for 15min, then filter with polyester or vinylon filter cloth; then use 0.1mol·L -1 Soak in HCl solution for 15 minutes, filter again, wash with deionized water for 3-5 minutes, and dry at 100-105° C. to obtain zeolite A.

[0043] (2) React zeolite A in a chitosan alkaline solution with a mass concentration of 5% at 50° C. for 1 hour, then centrifuge and wash with distilled water to obtain zeolite B.

[0044] (3) Add zeolite B to 0.1mol L -1 Fe 2 (SO 4 ) 3 solution, let it stand for 15 minutes; under the condition of magnetic stirring, add the mixed alkaline solution at a volume ratio of 1:1; the NaBH in the mixed alkaline solution 4 The concentration is 0.1mol L -1 , (N...

Embodiment 2

[0055] (1) Preparation of magnetically modified zeolite material: the difference between this embodiment and Example 1 is that NaBH 4 and (NH 2 ) 2 CSO 2 In the mixed alkaline solution, the concentrations of the two are 0.05mol L -1 and 0.02mol·L -1 . Other steps and parameters are the same as in Example 1.

[0056] (2) Using the magnetically modified zeolite material prepared in step (1) to treat Ni in electroplating industrial wastewater2+ Exceeding the standard problem: after pretreatment in the workshop, Ni in the discharged wastewater 2+ Still as high as 2.0mg·L -1 , pH is 7-8.5, using such as image 3 The process shown is to add 2.0g·L first -1 The magnetically modified zeolite material, the adsorption time is 30min, and then add 1.5mg·L -1 After the PFS is coagulated and precipitated for 30 minutes, the effluent can be reduced to 0.3-0.4mg·L after filtration of quartz sand -1 , to meet the emission standards.

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Abstract

The invention belongs to the technical field of environment protection and chemical separation, and particularly discloses a magnetic modified zeolite material for removing nickel through adsorption, and a preparation method and application thereof. The preparation method comprises the following steps: after performing acid-base pretreatment to zeolite and reacting in a chitosan alkaline solution, carrying out centrifugal separation, and washing with water; adding zeolite into a Fe2(SO4)3 solution, and standing for 10 to 20 minutes; adding a NaBH4 and (NH2)2CSO2 mixed alkaline solution under the stirring condition; and heating the mixed solution to 50-60 DEG C, and then stirring and continuously reacting for 3 to 5 minutes to obtain the magnetic modified zeolite material for removing nickel through adsorption. The preparation method of the magnetic modified zeolite material is simple, low in cost and convenient to use, the specific surface area is large, active sites are more, and the magnetic modified zeolite material can be used for removing Ni<2+> in raw water of micro-polluted drinking water or industrial waste water, and has the advantages of being high in adsorption speed, high in adsorption capacity, high in removal efficiency and the like.

Description

technical field [0001] The invention belongs to the technical fields of environmental protection and chemical separation, and in particular relates to a magnetically modified zeolite material used for adsorption and removal of nickel, a preparation method and application thereof. Background technique [0002] With the rapid development of the economy, the demand and consumption of nickel increase rapidly. Many production industries such as electroplating, metallurgy, mining, and printing plate manufacturing all produce nickel-containing wastewater. Although the discharge is less than other industrial wastewater, the pollution area is relatively large. If not properly treated, the surface water will be polluted. and source water pose a serious threat. Nickel is toxic to various aquatic organisms and the human body. After entering the human body through bioaccumulation or drinking water, nickel can be distributed in the brain, spinal cord, and lungs, causing chronic organ dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/28B01J20/30C02F1/28C02F1/62
CPCB01J20/06B01J20/165B01J20/28009C02F1/288
Inventor 任刚
Owner JINAN UNIVERSITY
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