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Preparation method of adsorbing material used for hexavalent chromium waste water treatment

An adsorption material and wastewater treatment technology, applied in the direction of adsorption water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of difficult site selection for sanitary landfills and inability to reflect land value, etc. Achieve the effect of a wide variety of microorganisms, good treatment effect, and small bulk density

Inactive Publication Date: 2012-06-20
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the improvement of public environmental awareness, the appreciation of land and the strengthening of national environmental protection, it has become more and more difficult to select a site for a sanitary landfill in recent years, and the investment of a general landfill is more than 40 million yuan, and the service life is only 10- In 15 years, the landfill that has been built has been greened after being closed, and can only be used as a green space, park, etc., and the land value cannot be reflected
In the face of tens of thousands of tons of domestic waste that has been landfilled, there is currently no practical solution in China

Method used

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  • Preparation method of adsorbing material used for hexavalent chromium waste water treatment
  • Preparation method of adsorbing material used for hexavalent chromium waste water treatment
  • Preparation method of adsorbing material used for hexavalent chromium waste water treatment

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example 1

[0020] Example 1: Prepare the required adsorbent material of the present invention with the method provided by the present invention, and use this adsorbent material to adopt the static adsorption mode to process the hexavalent chromium ion of heavy metal wastewater, and clarify respectively in three aspects such as different pH values, temperature and adsorption amount :

[0021] 1) Mix 5.00 g of the mineralized garbage adsorption material prepared in this experiment with a particle size of 60 mesh and 50 mL of hexavalent chromium solutions with concentrations of 5 and 25 mg / L under different pH conditions. Adjust the pH value of hydrochloric acid solution to 1, 2, 3, 4, 5, 6, and 7 respectively, place it on a constant temperature shaker for oscillation, adjust the temperature of the fixed shaker to 25°C, and shake for 24 hours when the oscillation speed is 200±5r / min Then calculate the removal efficiency of hexavalent chromium. The removal rate of hexavalent chromium in min...

example 2

[0024] Example 2: prepare the required adsorbent material of the present invention with the method provided by the present invention, and use this adsorbent material to adopt the dynamic adsorption mode to process the hexavalent chromium ion of heavy metal wastewater:

[0025] Condition control: The test adopts two different water inlet methods, countercurrent and downstream, and is divided into two stages. The concentration of hexavalent chromium in the first stage is 10mg / L, and the concentration of hexavalent chromium in the second stage is 20mg / L. , using an inner diameter of about 40mm and a height of 500mm thin-diameter chromatography column as a device for the reaction bed, and the height of the mineralized waste reaction bed is 400mm. The chromatographic column is attached with a screen, and gravel, fine sand and mineralized garbage are filled sequentially from the bottom of the chromatographic column upwards, and the function of filling the gravel and fine sand is to s...

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Abstract

The invention relates to a preparation method of adsorbing material used for hexavalent chromium waste water treatment. according to the preparation method, household garbage is exploited and utilized to prepare a hexavalent chromium waste water adsorbent, namely the household garbage buried for more than 10 or 15 years in a landfill is excavated and is made into mineralized garbage adsorbing material which is used as adsorbing material used for heavy metal waste water treatment. The stabilized garbage, namely the mineralized garbage, is formed by the household garbage in a landfill, humified and stabilized for a long time, 50-60% of organic fine material can be obtained perform each ton of garbage after being screened, and the mineralized garbage is a biomedium and adsorbing material with good degradation capability and has the characteristics of lower volume weight, high porosity, high organic matter content, high cationic exchange content, various microorganism varieties and the like. The mineralized garbage has good treatment effect in a hexavalent chromium waste water removing process, has the advantages of low cost, simpleness in preparation, high yield and the like, is an environmentally friendly adsorbing material and can achieve double effects of removing hexavalent chromium and recycling garbage.

Description

technical field [0001] The invention belongs to the technical field of waste water pollution control, and in particular relates to a method for preparing an adsorption material for treating hexavalent chromium waste water. Background technique [0002] With the rapid development of China's industrialization and urbanization, some developed areas discharge high-concentration pollutants into the water body overload, causing serious pollution to the water body because the water body cannot achieve self-purification. Chromium (Cr) is one of the most common heavy metal pollutants in water bodies, mostly from the wastewater discharged from electroplating, tanning, metal surface treatment and chromate processing. In the aqueous environment, chromium mainly has two valence states, Cr(VI) and Cr(III). Compared with Cr(III), Cr(VI) has high solubility, is a strong oxidant and a potential carcinogen, mainly HCrO 4 - or Cr 2 o 7 - and other anions are present. At present, the treat...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28B09B3/00C02F101/22
Inventor 孙英杰王华伟王刚郭庆园
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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