Method for preparing photocatalytic material from heavy metal ions in biological adsorption solution

Abstract

The invention provides a method for preparing a photocatalytic material from heavy metal ions in a biological adsorption solution. Based on a biological adsorption technology, the heavy metal ions in industrial wastewater are adsorbed and enriched onto biomass powder particles, then the biomass powder loaded with the heavy metal ions is subjected to a contact reaction with reagents (sodium sulfide, sodium hydrosulfide, thiourea, hydrogen sulphide or sodium selenide, sodium hydrogen selenide, selenourea, hydrogen selenide and the like ) which can provide an S<2-> or Se<2-> source, so that the heavy metal ions adsorbed on the biomass powder particles are in-situ converted into corresponding metal sulfides (selenides). The method realizes a new way of high-valued utilization of various industrial wastewater containing low-concentration valuable metal ions, reaches purposes of economically and efficiently removing the low-concentration metal ions in the industrial wastewater in virtue of biological adsorption, has the highlight advantages of being fast to adsorb, low in cost, short in powder making flow, large in yield, and easy to scale.

Description

Technical field

[0001] The present invention involves the new method of integrated shortflow process preparation of industrial wastewater containing heavy metal ions and the integrated shortflow process preparation of visible light catalytic materials, especially for a new new way to significantly increase the existing industrial wastewater purification process.technology. Background technique

[0002] Mining, mineral selection, metallurgy, metal processing and recycling industries will produce industrial wastewater with a large amount of heavy metal ions (such as copper, lead, zinc, cadmium, nickel, cobalt, cash, silver, etc.).Reasonable treatment of out -of -ground arrangements will cause serious environmental pollution and waste of resources, which will directly affect the sustainable development of these industries.

[0003] The traditional method of governance of such heavy metal ion industrial wastewater is mainly to stay in purifying wastewater to the standard, and a large...