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Adsorbent for ultra-rapidly removing heavy metal ions in acidic wastewater

A technology for heavy metal ions and acidic wastewater, applied in the direction of adsorption of water/sewage treatment, water pollutants, water/sewage treatment, etc., can solve the problem that heavy metal ions are difficult to be effectively treated, achieve fast adsorption rate, increase capture capacity, high The effect of adsorption capacity

Active Publication Date: 2021-02-23
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the problem that a large number of heavy metal ions in acidic mine wastewater are difficult to be effectively treated, the present invention provides an adsorbent for ultra-fast removal of heavy metal ions in acidic wastewater

Method used

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  • Adsorbent for ultra-rapidly removing heavy metal ions in acidic wastewater
  • Adsorbent for ultra-rapidly removing heavy metal ions in acidic wastewater
  • Adsorbent for ultra-rapidly removing heavy metal ions in acidic wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 2 g of PVA, 50 mL of DMF, and 1.61 g of phosphorus pentoxide (the molar ratio of hydroxyl to phosphorus pentoxide is 4:1) in a two-necked flask, under nitrogen protection, and react at 125 °C for 4 h to obtain a red viscous solid. Cool, filter, add a large amount of secondary water to wash, and then wash with ethanol to obtain a red granular solid. 60 o C oven dried for 12 h to obtain the adsorbent. Infrared detection proves that there is a phosphate ester structure in the adsorbent (attached figure 1 ).

Embodiment 2

[0024] Add 0.05 g of the adsorbent prepared by the above method into 50 mL of 100 ppm lead ion, copper ion, and cadmium ion solutions with different pH values ​​(adjust the pH with 1 mol / L hydrochloric acid and sodium hydroxide), and shake at 25°C for 10 min. Filter, measure the remaining ion concentration in the water body, and calculate the removal rate (attached figure 2 ).

Embodiment 3

[0026] Add 0.05 g of the adsorbent prepared by the above method into 50 mL of 100 ppm lead ion, copper ion, and cadmium ion solutions at pH=3, shake at 25°C for different times, take out, filter, measure the remaining ion concentration in the water body, and calculate Removal rates were obtained (Supplementary Table 1).

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Abstract

The invention discloses an adsorbent for ultra-rapidly removing heavy metal ions in acid wastewater, and belongs to the field of sewage treatment and environmental protection. A specific preparation method comprises the steps: reacting polyvinyl alcohol with phosphorus pentoxide to obtain the polyvinyl alcohol phosphate adsorbent. The polyvinyl alcohol phosphate adsorbent prepared by the preparation method disclosed by the invention has an ultrafast adsorption rate and excellent adsorption capacity on lead ions, copper ions and cadmium ions under an acidic condition, and can be applied to removal of heavy metal ions in acidic wastewater.

Description

technical field [0001] The invention relates to an adsorbent for ultrafast removal of heavy metal ions in acidic wastewater, in particular to a synthesis method of a phosphate-based functionalized adsorbent. Background technique [0002] Industrial development has caused a series of environmental problems. Among them, heavy metal pollution is the most common in water systems. Heavy metal ions are toxic, bioaccumulative and non-degradable, and excessive accumulation in the human body can cause various diseases. [0003] At present, there are many methods for removing heavy metal ions from the environment, mainly including precipitation, ion exchange, membrane filtration, chemical reduction, adsorption, biological methods, photocatalysis, electrochemical flocculation and other methods. Among them, the adsorption method is characterized by its high efficiency, It has attracted much attention due to its reliability, simple equipment, and economical feasibility. The core of ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20
CPCB01J20/267C02F1/286C02F2101/20
Inventor 崔玉孙君华孙国新赵奕铭
Owner UNIV OF JINAN
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