Modified vesuvianite adsorbent and electroplating wastewater treatment method

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...

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 bacteria to remove metals to treat electroplating wastewater. The amount of sludge is very small, and the water quality after treatment without secondary pollution is better than the national and International sewage discharge standards, but the treatment cost is high and the effect is unstable

Therefore, in addition to applying clean production and circular economy technologies to curb the use and discharge of heavy metals from the source, there is no industry-accepted ideal method for treating heavy metals in electroplating wastewater.