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Preparation method of zinc chloride modified red mud

A technology of zinc chloride and red mud, applied in the field of chemistry, can solve the problem of low phosphorus removal adsorption capacity of red mud, and achieve the effects of short synthesis processing time, stable quality and uniform appearance

Inactive Publication Date: 2010-09-29
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem of low adsorption capacity of red mud for phosphorus removal in existing sewage treatment, the present invention provides a preparation method of zinc chloride modified red mud

Method used

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  • Preparation method of zinc chloride modified red mud

Examples

Experimental program
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Effect test

Embodiment 1

[0019] The method for preparing zinc chloride modified red mud by constant temperature stirring method, the steps are as follows:

[0020] (1) Select 5g of red mud passed through a 100-mesh sieve and place it in a 250mL triangular round bottom flask, add 100mL0.3mol / LZnCl 2 solution,

[0021] (2) Place the above flask in the HH.S precision constant temperature water bath generator, adjust the water temperature in the water bath to 30°C (ie modification temperature), and stir and react at constant temperature for 1h (ie modification time);

[0022] (3) The solid phase obtained after suction filtration of the reaction solution is zinc chloride modified red mud, and the zinc chloride modified red mud is washed with distilled water until the filtrate does not contain chloride ions (detection: drop 0.1mol / L of silver nitrate to No white precipitate is formed), dried at 105°C, ground, and passed through a 100-mesh sieve to prepare a zinc chloride-modified red mud product.

Embodiment 2-10

[0023] Embodiment 2-10: The preparation steps are the same as in Example 1, except that the ZnCl in the step (1) 2 Concentration, modification temperature and modification time in step (2), see Table 1 for details.

[0024] Each 0.2 g of zinc chloride modified red mud products prepared in the above examples is used to simulate the adsorption treatment of phosphorus-containing wastewater. The experimental method is a conventional method in the art, as follows:

[0025] Weigh 0.2197g KH 2 PO 4 (analytical pure), dissolved in deionized water, transferred to a 1000ml volumetric flask and constant to the mark with deionized water, to obtain a phosphoric acid solution with a concentration of 50mg / L.

[0026] The prepared modified zinc chloride red mud was used as an adsorbent to treat the above-mentioned simulated phosphorus-containing wastewater, and the static method was used for testing: adjust the pH value of the phosphoric acid solution to 3.0, and take 50 mg / L of KH 2 PO 4...

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Abstract

The invention relates to a preparation method of zinc chloride modified red mud, comprising the steps of taking red mud and zinc chloride as primary raw materials and adopting stirring method in thermostatic waterbath to prepare the modified red mud. The zinc chloride modified red mud prepared by the invention has excellent adsorbability, short synthetic processing time, simple synthetic process and low energy consumption; the obtained zinc chloride solution modified red mud product has stable quality, uniform appearance, lower cost and good effect on processing phosphorus-containing wastewater.

Description

technical field [0001] The invention relates to a zinc chloride modified red mud and a preparation method thereof. The modified red mud is used as an adsorbent to remove phosphorus from sewage, and belongs to the field of chemical technology. Background technique [0002] The research on the preparation of modified red mud is the hot spot and frontier field of adsorption research at home and abroad. The modification of red mud is mainly to change the spatial structure of red mud and the composition and content of chemical components through physical and chemical methods. [0003] At present, the commonly used modified red mud preparation methods in my country are relatively narrow, mainly roasting modification, hydrochloric acid modification and ferric chloride modification. Zinc chloride, as an activator of metal inorganic salts, has the effect of changing the chemical composition of mineral surfaces and eliminating inhibitors. This study found that the volume of red mud ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/30
Inventor 岳钦艳韦锋于淼赵聪聪李倩柴君张红续广智
Owner SHANDONG UNIV