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

A technology of photocatalytic materials and heavy metal ions, which is applied in the field of preparing photocatalytic materials from heavy metal ions in biosorption solutions

Active Publication Date: 2014-10-08
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention also solves the problem of how to achieve high-value utilization of biosorbent materials that absorb and enrich valuable metal ions from industrial wastewater containing low concentrations of metal ions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0035] Prepare 10 liters of cadmium sulfate ion solution with a concentration of 0.1M. After adjusting the pH value of the solution to 6.0, add 200 grams of garlic residue adsorbent, stir and react for 30 minutes, filter the adsorbent, wash with distilled water for 3 times, and put it in 60 Bake with hot air in an oven at °C for 1 hour; put the obtained adsorbent into the reaction kettle, add 500 milliliters of sodium sulfide solution with a concentration of 0.1M, stir and react for 5 minutes, filter and separate the solid matter, and wash repeatedly with clean water for 2 After -3 times, dry in a hot air box at 60 degrees Celsius, further grind, sieve, and classify to obtain a cadmium sulfide-based (CdS) composite visible light photocatalytic material.

Embodiment approach 2

[0037] Prepare 20 liters of zinc sulfate and cadmium sulfate mixed ion solutions with a concentration of 0.05M, adjust the pH of the solution to 6.5, add 500 grams of garlic residue adsorbent, stir and react for 240 minutes, filter the adsorbent, and wash with distilled water After 3 times, put into the baking oven of 60 ℃ and dry with hot air for 3 hours; Gained adsorbent is put into the reactor, adding concentration is 1500 milliliters of sodium sulfide solution of 1M, after stirring and reacting for 500 minutes, filter and separate the solid matter, After repeatedly washing with clean water for 2-3 times, drying in a hot air box at 50 degrees Celsius, further grinding, sieving, and grading, the zinc cadmium sulfide series (CdZnS) composite visible light photocatalytic material can be obtained.

Embodiment approach 3

[0039] Prepare 20 liters of zinc sulfate and cadmium sulfate ion solutions each containing 0.05M concentration, after adjusting the pH value of the solution to 6.5, drop into 100 grams of chitosan adsorbent, stir and react after 120 minutes, filter the adsorbent, wash with distilled water for 3 After the second time, put into 60 DEG C of baking ovens and dry with hot air for 1 hour; Gained adsorbent is put into the reactor, adding concentration is 200 milliliters of sodium sulfide solution of 0.5M, after stirring and reacting for 100 minutes, filter and separate the solid matter, After repeatedly washing with clean water for 2-3 times, drying in a hot air box at 50 degrees Celsius, further grinding, sieving, and grading, the zinc cadmium sulfide series (CdZnS) composite visible light photocatalytic material can be obtained.

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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...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J27/043B01J27/057C02F1/28C02F1/30C02F103/16
CPCY02W10/37
Inventor 黄凯徐盈邱颢艺马铖佑杨超杨宏黄瑛朱鸿民
Owner UNIV OF SCI & TECH BEIJING
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