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Composite film for efficiently and rapidly capturing heavy metal in complex system and application method thereof

A composite membrane and heavy metal technology, applied in the field of composite membrane, can solve the problems of poor load bearing capacity, poor treatment effect, heavy secondary pollution, etc., achieve the effect of reducing heavy metal concentration, easy application and operation, and realization of recycling

Inactive Publication Date: 2019-01-25
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of poor load bearing capacity, poor treatment effect and heavy secondary pollution in the prior art for complex wastewater containing heavy metals, the present invention provides a composite membrane for efficient and rapid capture of heavy metals in a complex system and a method for its application

Method used

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  • Composite film for efficiently and rapidly capturing heavy metal in complex system and application method thereof
  • Composite film for efficiently and rapidly capturing heavy metal in complex system and application method thereof
  • Composite film for efficiently and rapidly capturing heavy metal in complex system and application method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A kind of composite film and its application method for efficient and fast trapping of heavy metals in a complex system, the steps of which are:

[0028] (1) the composite waste water (initial concentration of lead is 10mg / L, and the initial concentration of tartaric acid is 10mg / L) of the composite wastewater of lead to be treated and tartaric acid is adjusted to 5, then pumps into the filter system of filling composite membrane, control The adsorption temperature is 30°C, and the effluent flow rate is 15.0L m -2 h -1 , until the adsorption breaks through.

[0029] (2) After the adsorption is saturated, pump hydrochloric acid with a mass fraction of 10% into the filter system in step (1) for regeneration, control the regeneration temperature to 25°C, and the outlet water flow rate to 30.0L m -2 h -1 , and the regenerated composite membrane was washed to neutral with water to obtain a regenerated composite membrane.

[0030] Composite membrane preparation method in ...

Embodiment 2

[0034] With embodiment 1, difference is: the initial concentration of lead is 5mg / L in the step (1), and acid black replaces tartaric acid, and initial concentration is 20mg / L, and pretreatment process regulates pH value to be 2, and control adsorption The temperature is 45°C, and the outlet water flow rate is 20.0L m -2 h -1 n, step (2) is regenerated with dilute nitric acid with a mass fraction of 5%, the regeneration temperature is 35°C, and the flow rate is 10.0L m -2 h -1 .

Embodiment 3

[0036] With embodiment 1, difference is: the initial concentration of lead is 20mg / L in the step (1), and oxalic acid replaces tartaric acid, and initial concentration is 2mg / L, and the pretreatment process adjustment pH value is 6, and control adsorption temperature at 5°C, the outlet water flow rate is 0.1L m -2 h -1 , the regeneration process of step (2) uses dilute sulfuric acid with a mass fraction of 2% for regeneration, the regeneration temperature is 50°C, and the flow rate is 0.1L m -2 h -1 .

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Abstract

The invention belongs to the field of heavy metal wastewater treating, and particularly relates to a composite film for efficiently and rapidly capturing heavy metal in a complex system and an application method thereof. Wastewater treating includes the steps that 1, heavy metal complex wastewater is pumped into the system with the composite film and then is purified; 2, diluted acid serves as a washing agent to regenerate the used composite film, and a regenerated composite film can be in reuse. The composite film is prepared through the steps of blending oxidized graphene and superficially depositing dopamine. The composite film is easy to prepare, operation is convenient, polymorphic and multi-valence heavy metal is easy to separate, enrich and recycle, and the composite film is suitable for treating all kinds of heavy metal complex wastewater and has broad-spectrum performance.

Description

technical field [0001] The invention belongs to the field of heavy metal wastewater treatment, and in particular relates to a composite membrane for efficiently and quickly capturing heavy metals in a complex system and an application method thereof. Background technique [0002] Typical heavy metals in the environment cannot be biodegraded or oxidatively decomposed, and only undergo changes in form or valence. Heavy metals in the water environment not only have prominent toxic effects, but also have the main characteristics of universality, complexity, long latency, and difficulty in control. Such pollutants often exist in electroplating, chemical industry, tanning and other industrial wastewater, landfill leachate, polluted surface water, and groundwater, and coexist with various organic or inorganic complexes, resulting in conventional water treatment technologies (such as And precipitation method, electrochemical method and bioremediation method, etc.) have many shortcom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D71/06B01D71/34B01D67/00C02F1/44C02F101/20
CPCB01D67/0079B01D69/12B01D71/06B01D71/34C02F1/44C02F2101/20
Inventor 刘福强张艳红袁冉冉刘自成袁媛仇欢岳彩良李爱民
Owner NANJING UNIV
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