Modified sepiolite adsorbent, preparation method and application thereof

A sepiolite and adsorbent technology, applied in the field of modified sepiolite adsorbent, can solve problems such as harm to aquatic organisms and human health, long residual time, mutagenicity, etc., and achieve stable adsorption efficiency, large adsorption capacity, good adsorption The effect of the adsorption effect

Active Publication Date: 2020-06-19
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, malachite green remains in fish and in the environment for a long time, and it will cause "three causes" (mutagenic, carcinogenic, and teratog

Method used

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  • Modified sepiolite adsorbent, preparation method and application thereof
  • Modified sepiolite adsorbent, preparation method and application thereof
  • Modified sepiolite adsorbent, preparation method and application thereof

Examples

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preparation example Construction

[0018] As mentioned above, in view of the deficiencies in the prior art, the inventor of this case proposed the technical solution of the present invention after long-term research and extensive practice, which mainly provides a modified sepiolite adsorbent for rapidly purifying dye wastewater The preparation method comprises: using sepiolite as a raw material, sequentially washing the sepiolite with water and high-temperature treatment in different atmospheres to obtain modified sepiolite adsorbents roasted in different atmospheres.

[0019] The technical solution, its implementation process and principle will be further explained as follows.

[0020] One aspect of the embodiments of the present invention provides a method for preparing a modified sepiolite adsorbent for rapid purification of dye wastewater, comprising:

[0021] The sepiolite powder is subjected to high-temperature treatment in a selected atmosphere to obtain a modified sepiolite adsorbent; the temperature of...

Embodiment 1

[0047] (1) Washing treatment: take commercial sepiolite, and use 500mL deionized water to carry out suction filtration and washing for several times at room temperature to remove dust impurities; remove moisture;

[0048] (2) High temperature treatment: take the sepiolite powder, add it into a quartz tube, and heat it at 100mLmin -1 The flow continues to flow into N 2 , from room temperature to 5°C min -1 The heating rate was raised to 800 ° C for 1 h, the total time of the high-temperature reaction was 10 h, and then cooled to room temperature to obtain a modified sepiolite adsorbent;

[0049] The method for quickly purifying malachite green sewage by the modified sepiolite adsorbent prepared by the present embodiment comprises the following steps:

[0050] Get the modified sepiolite adsorbent in the present embodiment of 0.0100g, add 10ml initial concentration is 5000mg L -1 malachite green solution, put it into a 50ml small test tube, put the small test tube into a magn...

Embodiment 2

[0056] In this embodiment, the preparation process and conditions are basically the same as in Example 1, except that in step (2) the -1 The flow continues to flow into N 2 Perform high temperature treatment.

[0057] The modified sepiolite adsorbent prepared in this example is adjusted to an initial concentration of 4500-5500 mg L according to the same conditions as in Example 1. -1 malachite green solution for adsorption. The results show that the maximum adsorption capacity of the modified sepiolite adsorbent in this example to the malachite green solution is 4999.60mg g -1 , the removal rate is 99.99%.

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Abstract

The invention discloses a modified sepiolite adsorbent, a preparation method and application thereof. The preparation method comprises the following steps: performing high-temperature treatment on sepiolite powder in a selected atmosphere to obtain a modified sepiolite adsorbent, wherein the temperature of the high-temperature treatment is 700-900 DEG C, the time of the high-temperature treatmentis 10-11 hours, and the gas for forming the selected atmosphere comprises any one or a combination of more than two of nitrogen, hydrogen and air. The modified sepiolite adsorbent for rapidly purifying dye wastewater is high in adsorption efficiency, large in adsorption capacity and high in dye removal rate, and has a good adsorption effect on crystal violet and acid fuchsin, wherein the removal rates are respectively 99.92% and 99.23%, and the maximum adsorption capacities are respectively 299.75 mg/g and 1984.70 mg/g; and the preparation process is simple, the cost is low, and the potentialapplication value is provided in environmental treatment, especially in dye wastewater treatment.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a modified sepiolite adsorbent for rapidly purifying dye wastewater, a preparation method and application thereof. Background technique [0002] With the rapid development of many industries such as textile, paper and food, dyes have become one of the main sources of water pollution. According to statistics, there are 100,000 different dyes each year about 7×10 5 tons are used in the printing and dyeing industry, 10% of which are directly discharged into water bodies, and the discharge is increasing year by year (Esra Altintiga,*, Muge Onarana, Ahmet Sar 1 , et al. Preparation, characterization and evaluation of bio-based magnetic activated carbon for effective adsorption of malachite green from aqueous solution [J]. Materials Chemistry and Physics, 2018.). Dye wastewater is composed of complex mixtures such as dye auxiliaries, acids, alkali compounds and eve...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30C02F1/28C02F101/30C02F101/36
CPCB01J20/10C02F1/285C02F2101/308C02F2101/36C02F2101/40Y02W10/37
Inventor 李爽李玉莹付西超周佳伟辛永洁
Owner NORTHWEST UNIV
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