Modified vesuvianite adsorbent and electroplating wastewater treatment method

A technology of electroplating wastewater and volcanic rock, which is applied in the direction of adsorption water/sewage treatment, metallurgical wastewater treatment, water/sludge/sewage treatment, etc. It can solve the problems of no ideal method for heavy metals, low adsorption efficiency, and high treatment cost. The modification method is simple and feasible, the treatment effect is stable, and the manufacturing cost is low.

Inactive Publication Date: 2014-08-06
NINGBO UNIVERSITY OF TECHNOLOGY
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

New technology for purifying electroplating wastewater from bran: bran is a kind of waste produced in the process of flour processing. This production waste is used as an adsorbent to purify the wastewater containing a large amount of metals produced in the production process of electroplating industry, but the adsorption efficiency is not very high ; New technology for microbial treatment of electroplating wastewater: This technology is obtained from electroplating sludge and wastewater with high-efficiency composite functional bac

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1. Preparation of modified adsorbent

[0015] Add 105g of natural volcanic stone powder and 2.6g of p-toluenesulfonic acid into a 1000ml three-necked flask, and then add toluene. Add 200ml tetraethyl orthosilicate at a rate of 10mL / min to carry out the sol-gelation reaction, continue to stir until the solution becomes a solid phase, wash the solid phase with distilled water until the mass remains unchanged, and dry at 110°C for 2 hours to obtain a modified Lava gel.

[0016] 50g of 2-chloromethylpyridine, 50g of modified volcanic gel and 150g of methanol were placed in a reactor and stirred at 65°C and 200rpm for 20 hours to obtain amber particles. Wash the amber particles with distilled water until the mass remains constant, then dry at 60°C until the mass remains constant, grind and sieve with 80-100 mesh to obtain the final product modified volcanic rock adsorbent, which is put into a brown vial for later use.

[0017] 2. Treatment of electroplating wastewater

[...

Embodiment 2

[0026] Get the modified volcanic rock adsorbent in 0.1g, 0.3g, 0.5g, 1.0, 1.5g, 2.0g embodiment 1 and join in 100mL galvanized chrome-plated mixed waste water respectively, adjust pH value to be 6.0, at room temperature with 220rpm Stir at a high speed for 4 hours, filter with suction, remove the filter residue, analyze and detect with a Shimadzu AA-6200 atomic spectrophotometer, and measure the content of heavy metal chromium. The adsorption rate was calculated and the results are shown in Table 2.

[0027] Table 2

[0028] Adsorbent dosage (g)

[0029] It can be seen from Table 2 that the dosage ratio of adsorbent to electroplating wastewater is 0.3-0.5g: 100mL, which can not only get good treatment effect, but also the dosage of adsorbent is more economical.

Embodiment 3

[0031] Get 0.5 g of the modified volcanic rock adsorbent prepared in Example 1 and mix it with 100 ml of galvanized and chrome-plated mixed waste water, five parts in total, adjust the pH value to 3.0, 5.0, 6.0, 7.0, 8.0, 9.0 respectively, and at 25 ° C at 220 rpm Stir for 4 hours; after the reaction, the solution is centrifuged, and the supernatant is put into a small test tube, analyzed and detected by a Shimadzu AA-6200 atomic spectrophotometer, and the heavy metal chromium content is measured. The calculation results of the adsorption rate are shown in Table 3.

[0032] table 3

[0033] pH value

[0034] It can be seen from Table 3 that the adsorption effect is the best when the pH is 6.0-7.0 during the change of pH from acidic to alkaline.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a modified vesuvianite adsorbent and an electroplating wastewater treatment method. The modified vesuvianite adsorbent is characterized in that a preparation method of the modified vesuvianite adsorbent comprises the following steps: adding vesuvianite powder and para-toluenesulfonic acid into methylbenzene, and stirring at the rotation speed of 200-300rpm at room temperature; heating to be at 55-65 DEG C, adding 180-220ml of tetraethoxysilane at 8-12mL/min, continuously stirring until the solution is changed to be in a solid phase; washing the solid phase with distilled water until the mass is constant, and drying at 100-120 DEG C for 1.5-2.5h to obtain modified vesuvianite gel; and mixing 2-chloromethylpyridine, the modified vesuvianite gel and methanol, stirring at the rotation speed of 200-300rpm at 60-70 DEG C to obtain amber particles, washing the amber particles with distilled water until the mass is constant, drying at 55-65 DEG C until the mass is constant, grinding, and sieving with a 80-100 mesh screen to obtain the modified vesuvianite adsorbent. The modified vesuvianite adsorbent is low in manufacture cost and is simple and practicable in modifying method, and the modified adsorbent has high adsorption rate (up to more than 99%) of chromium in electroplating wastewater and has high efficiency and stable treatment effect.

Description

technical field [0001] The invention relates to an adsorbent for wastewater treatment and a method for treating electroplating wastewater, in particular to a modified volcanic rock adsorbent and a method for treating electroplating wastewater. Background technique [0002] Electroplating wastewater contains many heavy metal ions, such as chromium, iron, zinc, cadmium, lead, copper, nickel, etc. Because these ions are difficult to degrade and destroy, they are discharged into the environment and can be abundant in fish and other aquatic organisms and crop tissues. Collected, through the drinking water and the food chain, it will cause wider and more serious harm to human beings. Therefore, electroplating wastewater needs to be treated before it can be discharged. [0003] At present, the treatment methods for electroplating heavy metal wastewater mainly include chemical reduction precipitation method, ion exchange method, electrochemical reduction method and evaporation reco...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J20/10B01J20/30C02F1/28C02F101/22C02F103/16
Inventor 彭革万丽娟
Owner NINGBO UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap