Adsorbent for removing toxic element arsenic in water and application thereof

An adsorbent and water removal technology, which is applied in the field of water treatment, can solve the problems of poor treatment effect and low saturated adsorption capacity, and achieve the effects of low cost, strong adsorption capacity, and simple and easy preparation process

Inactive Publication Date: 2013-01-23
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the saturated adsorption capacity of fly ash itself to pentavalent arsenic in aqueous solution is not high, and the treatment effect is not good. It is very necessary to solve this problem and make full use of fly ash

Method used

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  • Adsorbent for removing toxic element arsenic in water and application thereof
  • Adsorbent for removing toxic element arsenic in water and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 pickling fly ash

[0018] Take 10g of fly ash in a 500 mL large beaker, add 400 mL of deionized water, place it on a magnetic stirrer and stir vigorously, then adjust the pH of the solution to 2 with 2mol / L nitric acid, and stir for 1 hour. Ensure pH=2. The stirring was stopped, and the fly ash was washed repeatedly with deionized water until the washed water was neutral (pH 6.5-7.5), and dried at 105°C for 6 h to obtain the pickled fly ash.

Embodiment 2

[0019] Example 2 Preparation of fly ash material modified by zirconium manganese composite oxide

[0020] Add 200mL of deionized water to a 250mL Erlenmeyer flask, and then add 4.028g of ZrOCl 2 ·8H 2 O and 8.451g MnSO 4 ·H 2 O, the molar ratio of zirconium to manganese (Zr:Mn=1:4) was placed on a magnetic stirrer and stirred vigorously. Add 1mol / L NaOH solution to the solution to adjust pH=7.5. In order to ensure that the zirconium manganese oxide fully reacted, the solution was vigorously stirred for 1 h, and at the same time, the pH of the solution was adjusted with 1 mol / L NaOH, so that the pH was always 7.5.

[0021] Add 10 g of the acid-washed fly ash prepared in Example 1 into the solution, and stir thoroughly for 0.5 h. Then leave it to age for 24 hours. Rinse the fly ash repeatedly with deionized water until the filtrate is clear and the pH is 7-8. The fly ash after the reaction was collected and dried under vacuum at 80°C for 4 hours to prepare the zirconium m...

Embodiment 3

[0022] Example 3 Preparation of zirconium manganese oxide modified fly ash composite material

[0023] Add 200mL of deionized water to a 250mL Erlenmeyer flask, and then add 12.084g of ZrOCl 2 ·8H 2 O and 4.226g MnSO 4 ·H 2 O, the molar ratio of zirconium to manganese (Zr:Mn=3:2) was placed on a magnetic stirrer and stirred vigorously.

[0024] Other conditions are with embodiment 2.

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Abstract

The invention relates to an adsorbent for removing a toxic element arsenic in water and application thereof. The adsorbent is formed by carrying out modification on pickled coal powder ash by zirconium manganese composite oxide. The invention also provides a method for removing arsenate ions in polluted water by utilizing the adsorbent. The adsorbent disclosed by the invention overcomes the defects of characteristics of low arsenic adsorption capacity, low selectivity and poor adsorption effect, utilizes solid waste, i.e. the coal powder ash and recycles waste materials so as to fulfill the aim of treating the waste by the waste. Meanwhile, the coal powder ash has low price and a method for preparing the adsorbent is simple, and thus, the adsorbent has good economic and environmental benefits.

Description

technical field [0001] The invention relates to an adsorbent and its application, in particular to an adsorbent for removing toxic element arsenic in water and its application, belonging to the technical field of water treatment. Background technique [0002] Arsenic is a ubiquitous, highly toxic and carcinogenic element in the environment. Studies have shown that long-term exposure to arsenic, even at very low concentrations, can cause pathological changes in organisms. Long-term exposure to and drinking water contaminated by arsenic can cause lung cancer, liver cancer and skin cancer. In order to minimize the harm of arsenic, the World Health Organization (WHO) stipulates that the arsenic content in drinking water should not exceed 10 μg / L. Therefore, the removal of arsenic in water is of great significance to the protection of the ecological environment and human health. [0003] At present, the main methods for removing arsenic in water include coagulation sedimentati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08C02F1/28C02F1/62
Inventor 苑春刚金毅江万平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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