Supercharge Your Innovation With Domain-Expert AI Agents!

A method for simultaneous removal and separation of multiple heavy metals in wastewater

A technology of heavy metal ions and heavy metals, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as difficult separation and recovery, processing troubles, waste of resources, etc., to avoid pollution, fast adsorption speed, and realize The effect of resource recovery

Active Publication Date: 2019-12-10
SHANGHAI JIAO TONG UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, industrial wastewater generally contains a variety of heavy metals, and competitive adsorption will occur, resulting in the coexistence of various heavy metals on the adsorbent and it is difficult to separate and recover; at the same time, the used adsorbent is rich in various heavy metals, causing troubles to its subsequent treatment.
Therefore, the current adsorption method may cause waste of resources and potential secondary pollution.
[0004] To sum up, the existing industrial wastewater heavy metal treatment technology has shortcomings in the simultaneous removal and separation and recovery of multiple heavy metals, and it is urgent to further develop green treatment technologies with simultaneous separation and recovery of multiple heavy metals

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for simultaneous removal and separation of multiple heavy metals in wastewater
  • A method for simultaneous removal and separation of multiple heavy metals in wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The self-made simulated multi-metal wastewater was used as the treatment object, in which the contents of mercury, copper and lead were all 1.0mmol / L. The specific processing steps are as follows:

[0038] 1. Weigh three 50mg calcium sulfide adsorbents (the content of calcium sulfide on each adsorbent is 7.2mg), and add them to three beakers with a capacity of 250mL, respectively marked as beaker A and beaker B , Beaker C.

[0039] 2. Add 100mL of simulated heavy metal wastewater into beaker A, and stir the solution in beaker A at a stirring rate of 400r / min.

[0040] 3. After 2 hours of reaction, filter the solution in beaker A, add the filtrate to beaker B, and stir the solution in beaker B at a stirring rate of 400r / min. The filtered adsorbent was dried and stored, and marked as adsorbent A.

[0041] 4. After 2 hours of reaction, filter the solution in beaker B, add the filtrate to beaker C, and stir the solution in beaker C at a stirring rate of 400r / min. The fi...

Embodiment 2

[0045] The self-made simulated multi-metal wastewater was used as the treatment object, in which the contents of mercury, copper, lead and cadmium were all 1.0mmol / L. The specific processing steps are as follows:

[0046] 1. Weigh four 50mg calcium sulfide adsorbents (the content of calcium sulfide on each adsorbent is 7.2mg), add them to four beakers with a capacity of 250mL, and mark them as beaker A and beaker B respectively , beaker C and beaker D.

[0047] 2. Add 100mL of simulated heavy metal wastewater into beaker A, and stir the solution in beaker A at a stirring rate of 400r / min.

[0048] 3. After 2 hours of reaction, filter the solution in beaker A, add the filtrate to beaker B, and stir the solution in beaker B at a stirring rate of 400r / min. The filtered adsorbent was dried and stored, and marked as adsorbent A.

[0049] 4. After 2 hours of reaction, filter the solution in beaker B, add the filtrate to beaker C, and stir the solution in beaker C at a stirring ra...

Embodiment 3

[0054] The waste water contains eight heavy metals: mercury, copper, lead, cadmium, zinc, silver, antimony and indium. The content of each heavy metal is 0.1g / L. There are 8 waste water treatment adsorption tanks. Some adsorbents have a ratio of 0.1g / L to the volume of wastewater in the adsorption tank, and the active group of the adsorbent is a mixture of iron sulfide, calcium sulfide, and magnesium sulfide in a weight ratio of 1:1:1. The weight content is 10%.

[0055] The residence time of heavy metal-containing wastewater in each adsorption tank is 1 hour, and the stirring speed of the agitator in each adsorption tank is 60 rpm. All the other are with embodiment 1.

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 method for synchronously removing and separating a variety of heavy metals in wastewater. Mainly aimed at the treatment of wastewater containing a variety of heavy metals such as mercury, copper, lead and cadmium, the method utilizes a specific adsorbent to ultimately accumulate the various heavy metals respectively at different process stages by stage-by-stage adsorption treatment, thus achieving the objective of separation and recovery. Compared with the conventional heavy metal wastewater treatment process, the method disclosed by the invention can synchronously adsorb and separate a variety of heavy metals, and can realize the effective recycling of heavy metal resources, moreover, the process of the method is simple, and can be purposefully designed and adjusted according to different varieties of heavy metals, and the method is a new method for treating and recovering heavy metals in wastewater.

Description

technical field [0001] The invention belongs to the heavy metal-containing waste water treatment and recovery technology in the field of environmental protection, and relates to a treatment and heavy metal recovery process for waste water containing various heavy metals. This method is mainly aimed at the treatment of various heavy metal wastewater containing mercury, copper, lead, cadmium, etc., using a specific adsorbent to undergo segmental adsorption treatment, and finally makes various heavy metals accumulate in different process sections, so as to achieve the purpose of separation and recovery. . Background technique [0002] In recent years, some surface waters in my country have exceeded the standard of heavy metals in certain periods of time. Some enterprises in non-ferrous metal smelting, lead storage batteries, secondary lead, coal-fired power plants, cement, iron and steel smelting and other industries have high concentrations of heavy metals in the atmosphere, a...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F101/20
CPCC02F1/281C02F2101/20
Inventor 瞿赞晏乃强李良方丽陈冬瑶
Owner SHANGHAI JIAO TONG UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com