Preparation method of attapulgite adsorbent for removing nickel ions in water

A technology of attapulgite and nickel ions, applied in chemical instruments and methods, adsorption of water/sewage treatment, water pollutants, etc., can solve the problems of inability to remove organic matter and carbonate, low adsorption of heavy metal nickel, etc., and achieve reduction Harm to living organisms, excellent adsorption performance, pollution reduction effect

Inactive Publication Date: 2018-10-12
NANJING UNIV
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Problems solved by technology

This method cannot remove some fine-grained organic matter and carbonate, and the adsorption capacity of the product to the heavy metal nickel in water is still relatively low

Method used

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  • Preparation method of attapulgite adsorbent for removing nickel ions in water

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Embodiment 1

[0025] A method for preparing an attapulgite adsorbent for removing nickel ions in water, comprising the steps of:

[0026] (1) Crush and grind the massive attapulgite to below 50 mesh, then add the attapulgite powder into the hydrogen peroxide solution with a mass concentration of 10%, the ratio of solid to liquid is 1:20, stir for 24 hours, filter, and use After washing the filter residue with ion water for 4 times, the filter residue was centrifuged (5000r, 20min) to obtain the attapulgite after removing the organic matter;

[0027] (2) The attapulgite after the removal of organic matter in step (1) is added in 5% dilute hydrochloric acid solution, the solid-liquid ratio is 1:20, after stirring for 24h, filter, and after cleaning the filter residue 3 times with deionized water, the Filter residue is centrifuged (5000r, 20min), obtains the attapulgite after removing carbonate;

[0028] (3) Add the attapulgite after removing carbonate in step (2) into 20wt% sodium chloride s...

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Abstract

The invention relates to a preparation method of an attapulgite adsorbent for removing nickel ions in water and belongs to the technical field of water treatment. With the adoption of a step-by-step treatment method, organic matter and carbonate in attapulgite are removed, and purified attapulgite is subjected to acid activation and sodium saturation. The method is simple and low in cost, and theobtained attapulgite adsorbent has good adsorption performance for heavy metal nickel and performs thermal treatment on heavy metal nickel after adsorption saturation, the heavy metal nickel can participate in formation of a more stable mineral phase, and a backward reaction is blocked. The adsorbent can adsorb and fix the heavy metal nickel in water, and more stable enstatite in thermodynamics isgenerated, so that permanent fixation of the heavy metal nickel is realized. Without the risk of leakage and release, no heavy investment is required for long-time detection, pollution of nickel to water and danger of nickel to life bodies are reduced, in-place fixation of the heavy metal nickel can be realized according to local circumstances, and the attapulgite adsorbent has broad applicationprospects.

Description

technical field [0001] The invention relates to a preparation method of an adsorbent for removing nickel ions in water, belonging to the technical field of water treatment. Background technique [0002] As a common heavy metal element in daily life, nickel has certain sensitization, which is the most harmful to human skin and can easily cause allergic dermatitis; long-term exposure to low-concentration nickel-containing environments can also cause symptoms such as trachoma and chronic pharyngitis It also has a irritating effect on the human respiratory tract, which can easily cause bronchitis and even pneumonia; nickel also has certain carcinogenicity. Surveys show that smelting workers and nickel miners are more likely to suffer from nasopharyngeal cancer and lung cancer than ordinary people. In addition, as a radioactive element, 63Ni is also one of the main elements of nuclear waste, which will cause nuclear pollution. [0003] At present, the main methods used to remove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F101/20
CPCB01J20/12B01J20/3085C02F1/281C02F2101/20
Inventor 李伟任超莫昕欣王昭
Owner NANJING UNIV
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