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Modified vermiculite adsorbent

A technology of adsorbent and vermiculite, which is applied in the field of vermiculite adsorbent for wastewater treatment and its preparation, can solve the problem of high price, achieve the effects of low cost, reduced manufacturing cost, and easy availability of raw materials

Inactive Publication Date: 2016-10-12
洛阳新巨能高热技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These adsorbents are widely used and the price is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method of a kind of modified vermiculite adsorbent of the present invention is as follows:

[0026] First, the vermiculite is cleaned, dried, then crushed, screened, and the vermiculite with a particle size of 80-120 mesh is selected;

[0027] Secondly, soak the vermiculite with a phosphoric acid solution with a mass fraction of 40%-60% according to the solid-to-liquid ratio for 24 hours; activate the soaked vermiculite with microwaves to obtain a modified vermiculite adsorbent;

[0028] Then put the modified vermiculite adsorbent in a hydrochloric acid solution at 80°C for 1 hour, take it out and filter, wash the filter residue (modified vermiculite adsorbent) with distilled water until the cleaning solution is neutral, and then put the modified vermiculite adsorbent It can be dried in a constant temperature drying oven at 50°C.

[0029] The aforementioned method for preparing a modified vermiculite adsorbent, wherein the solid-to-liquid ratio is 1:5-1...

Embodiment 1

[0033] The vermiculite is cleaned, dried, then pulverized, screened, and the vermiculite with a particle size of 80-120 mesh is selected; the vermiculite is soaked in a phosphoric acid solution with a mass fraction of 40% according to a solid-to-liquid ratio of 1:5 for 24 hours; The soaked vermiculite is activated by microwave, activation conditions: microwave power 500W, microwave time 5min, to obtain modified vermiculite adsorbent; then put the modified vermiculite adsorbent in 80°C hydrochloric acid solution for 1h, filter, and The filter residue was washed with distilled water until the cleaning solution was neutral, and then the modified vermiculite adsorbent was dried in a constant temperature drying oven at 50°C. The obtained modified vermiculite adsorbent has a mercury removal rate of 92%.

Embodiment 2

[0035] The vermiculite is cleaned, dried, then pulverized, screened, and the vermiculite with a particle size of 80-120 mesh is selected; the vermiculite is soaked in a phosphoric acid solution with a mass fraction of 50% according to a solid-to-liquid ratio of 1:6 for 24 hours; The soaked vermiculite is activated by microwave, activation conditions: microwave power 600W, microwave time 6min, to obtain modified vermiculite adsorbent; then put the modified vermiculite adsorbent in 80°C hydrochloric acid solution for 1h, filter, and The filter residue was washed with distilled water until the cleaning solution was neutral, and then the modified vermiculite adsorbent was dried in a constant temperature drying oven at 50°C. The obtained modified vermiculite adsorbent has a mercury removal rate of 98%.

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Abstract

The invention relates to a modified vermiculite adsorbent. Vermiculite is taken as the base adsorbent, vermiculite is modified by soaking in phosphoric acid, the soaked vermiculite is then activated with microwave so as to obtain the modified vermiculite adsorbent. The mass fraction of the phosphoric acid is 40%-60%, the microwave activation conditions include microwave power of 500W-800W and a microwave time of 3min-6min. The adsorbent can reach a removal rate of over 90% on mercury in wastewater, also the preparation method is simple and the cost is low, therefore the modified vermiculite adsorbent is an efficient and cheap mineral adsorbent.

Description

technical field [0001] The invention relates to the field of adsorbent preparation, in particular to a vermiculite adsorbent used for wastewater treatment and a preparation method thereof. Background technique [0002] Mercury has received much attention as an important global pollutant that is quite toxic to humans and animals even at very low concentrations. Humans and animals can be exposed to mercury through direct contact with a mercury-contaminated environment or by ingesting mercury-containing water or food. Mercury discharged into the atmosphere and soil may eventually enter water bodies, where mercury and its compounds are enriched by aquatic organisms, especially fish. Accumulated mercury can ultimately affect the health of humans, animals and plants. It can be seen that the removal of mercury in the water environment is particularly important. [0003] It is an effective measure to treat wastewater by adsorption. Commonly used adsorbents include activated carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30C02F1/28C02F1/62C02F101/20
Inventor 丁超刘全泰郭帅
Owner 洛阳新巨能高热技术有限公司
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