Acid brilliant pink-calcium oxalate adsorbing material and its preparation method

An acid peach, adsorption material technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problem of long decolorization cycle, and achieve the effect of short settling time, good adsorption performance and easy operation.

Inactive Publication Date: 2008-11-19
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the advantages of no waste and complete utilization, but the decolorization p

Method used

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  • Acid brilliant pink-calcium oxalate adsorbing material and its preparation method
  • Acid brilliant pink-calcium oxalate adsorbing material and its preparation method
  • Acid brilliant pink-calcium oxalate adsorbing material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Calcium chloride, a soluble calcium-based framework material, is selected. Calcium chloride is added with water to form a calcium chloride solution with a concentration of 5% (w / w, weight percentage). The sodium oxalate is added with water to form a sodium oxalate solution with a concentration of 2% by weight. In a 2000ml beaker, under magnetic stirring conditions, add 800ml commercially available concentration of 95% technical grade ethanol, 400ml 10mM acid red 138 and 800ml 5% (w / w) calcium chloride solution, and then add 2% (w / w ) Sodium oxalate solution 200ml, mixing reaction 10~30 minutes, sedimentation 1h, 3 times of water washing (3 * 2000ml) sedimentation, leave overnight, collect sedimentation, be the suspension liquid product of the present invention.

[0028] The above-mentioned suspension product can also be made into a solid adsorption material product through centrifugation, drying, and crushing.

[0029] The composition of the above-mentioned adsorbent ...

Embodiment 2

[0034] The calcium-based skeleton material is calcium oxide of insoluble calcium. Dissolve calcium oxide with 1-10% (w / w) hydrochloric acid first, then neutralize it with 1%-10% (w / w) sodium hydroxide solution to pH 5-7, and finally add water to prepare a concentration of 20% by weight. % calcium solution. 1%-10% (w / w) sodium hydroxide is used to dissolve oxalic acid, and water is added to prepare a 5% sodium oxalate solution by weight. Acid red 138 dye wastewater was made into inclusion solution with a concentration of 20 mM. Commercially available methanol with a concentration of 75% was used as a colloidal solvent. According to calcium solution: sodium oxalate solution: inclusion solution: colloidal solvent = 4 parts: 1 part: 2 parts: 4 parts by weight. Then add acid red 138 inclusion solution and colloidal solvent into the calcium solution, add sodium oxalate solution under stirring condition, mix and react for 10 to 30 minutes, the precipitate is made into a suspension...

Embodiment 3

[0036] When the above-mentioned acid pink-calcium oxalate adsorption material produced by the method of the present invention was used to process cationic dye wastewater, 3 kinds of basic dye wastewater samples were prepared in a 10ml colorimetric tube: basic pink (chroma 480), acid brilliant blue 6B ( Chroma 320), ethyl violet (chroma 390). Add 0.1%, 0.3%, and 0.5% acid pink-calcium oxalate adsorption material of the sample weight respectively, and the measured data are shown in Table 2 after 30 minutes of precipitation. It can be seen that for acid brilliant blue 6B and ethyl violet, only 0.1% of the material can absorb more than 95% of the color, and the sedimentation is fast. For basic pink, adding 0.5% material can absorb more than 90% of the color. Therefore, the material has obvious adsorption effect on cationic dyes.

[0037] Table 2 Adsorption experimental data of three dyes

[0038]

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Abstract

The invention provides an acid brilliant pink and calcium oxalate absorbing material as well as the preparation method thereof, and relates to an absorbing material which can separate the coloring matter, the organic matter and the heavy metal in waste water as well as the preparation method thereof. The absorbing material is composed by compounding a calcium oxalate framework material (1) and an acid red 138 inclusion material (2). 4 parts of 5-20 percent (w/w) calcium solution with the pH valve of 5-7, 1 part of 2-5 percent (w/w) oxalate solution, 2 parts of 10-20mM acid red 138 inclusion material and 4 parts of colloidize solvent are weighed out, then the inclusion solution and the colloidize solvent are added into the calcium solution, after mixing, the oxalate solution is added under the condition of stirring, and then after the reaction lasts for 10 to 30 minutes, the product is obtained by settling and washing the sediment, the appearance of the product is red, the density is 1800 to 2200 kg/m<3>, and the product is insoluble in water and alcohol, and is soluble in the suspension liquid of concentrated sulfuric acid; or the solid product can be prepared by centrifugally separating, drying and crushing. The invention treats a waste with another waste, the cost is low, and the process is simple; the product can be used for absorbing the coloring matter, the organic compounds and the heavy metal in the waste water with the efficiency being more than 90 percent, thereby having worshipfully economic and social benefits.

Description

technical field [0001] The invention relates to an adsorption material capable of separating dyes, organic matter and heavy metals in waste water. It further relates to its preparation method. It belongs to the field of environmental material science and technology. Background technique [0002] A large amount of organic 4 and heavy metal waste water is discharged into the environment in the production process of dyestuff, medicine, chemical industry, smelting, electroplating, etc., which brings serious disasters to human beings and the ecological environment. For example, more than 10,000 dyes have been produced commercially, with 5-10% of the amount used being discharged into the aquatic environment. Most of the dye molecules contain aromatic groups, which are resistant to light, heat, and oxidation. Some dyes can cause allergies, dermatitis, redness and swelling of the skin, and even induce cancer and gene mutations. At present, there are 11 carcinogenic dyes on the ma...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28
Inventor 郜洪文王红艳赵丹华肖彦陈芳芳蔺婧
Owner TONGJI UNIV
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