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method for preparing aminopropyl-MCM-41 for adsorbing heavy metal ions in waste water

A -MCM-41, heavy metal ion technology, applied in the field of aminopropyl-MCM-41 adsorbent and its preparation, can solve the problems of small adsorption capacity, low selectivity and the like, achieve short production cycle, simple process and low price Effect

Inactive Publication Date: 2011-02-16
NANKAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the most commonly used commercial adsorbent is activated carbon, but its adsorption capacity is small and its selectivity is low. Therefore, the research and development of adsorbent materials has attracted more and more attention and attention.

Method used

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  • method for preparing aminopropyl-MCM-41 for adsorbing heavy metal ions in waste water
  • method for preparing aminopropyl-MCM-41 for adsorbing heavy metal ions in waste water
  • method for preparing aminopropyl-MCM-41 for adsorbing heavy metal ions in waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] First, dissolve 3ml of silane coupling agent KH-550 in 50ml of ethanol at room temperature, stir well, then add 5g of roasted mesoporous molecular sieve MCM-41, reflux in 70°C water bath for 8 hours, and the product is centrifuged Wash with ethanol and dry in a vacuum oven at 60°C to obtain aminopropyl-MCM-41.

[0014] The invention adopts a static adsorption method (batch method) to measure the removal rate and adsorption capacity of an adsorbent for mercury ions and lead ions. Specific steps are as follows:

[0015] Add 50ml of a certain initial concentration of mercury ion and lead ion solution to a 100ml dry Erlenmeyer flask, place it in a constant temperature water bath at 25°C, and then accurately weigh a certain amount of adsorbent aminopropyl-MCM-41 and place it in the solution , sealed Erlenmeyer flask, stirred and adsorbed at constant temperature for 2 hours, filtered with a sand core funnel, measured the concentration of mercury ions and lead ions remaining ...

Embodiment 2

[0021] The initial mercury ion concentration was 100 mg / L, and the other conditions were the same as in Example 1. Experiments showed that the removal rate under this condition was 90.92%, and the adsorption capacity was 45.46 mg / g.

Embodiment 3

[0023] The initial mercury ion concentration was 150 mg / L, and the rest of the conditions were the same as in Example 1. Experiments showed that the removal rate under this condition was 79.00%, and the adsorption capacity was 59.25 mg / g.

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Abstract

The invention provides a method for preparing an adsorbent for removing mercury ions, lead ions, and other heavy metal ions from waste water. The method comprises the following steps of: dissolving a silane coupling agent KH-550 in alcohol, and then adding a certain quantity of roasted mesoporous molecular sieves MCM-41; refluxing for 6-12 hours in a water bath at 60-80 DEG C; centrifuging and separating a product, and then washing with alcohol; and drying in vacuum at 40-80 DEG C to obtain the aminopropyl functional MCM-41. The invention has the characteristics of simple process, low raw material price, safety and low required equipment cost. The adsorbent has a three-dimensional pore canal structure and has excellent adsorption effect on the mercury ions and the lead ions in the waste water.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to an aminopropyl-MCM-41 adsorbent for removing heavy metal ions in wastewater and a preparation method thereof. Background technique [0002] In recent years, environmental pollution has become increasingly severe, and the discharge of heavy metal ions has caused serious harm to humans and other organisms. Especially mercury ions and lead ions can strongly interact with proteins and enzymes in the human body, making them inactive and causing chronic poisoning. How to effectively remove heavy metal ions in wastewater has become a serious practical problem faced by modern society. The commonly used methods for removing mercury ions and lead ions in wastewater mainly include sulfuration method, adsorption method, ion exchange method, etc. Among them, the adsorption process has the advantages of simple operation, low cost, and low energy consumption, so it is ...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F101/20B01J20/22B01J20/30
Inventor 李伟杨欣欣王寰付斌韩冲
Owner NANKAI UNIV
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