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Method for treating and recovering heavy metal-containing wastewater by fiber

A technology for fiber treatment and heavy metals, applied in the direction of filtration treatment, special treatment targets, multi-stage water treatment, etc., can solve the problems of high cost and low efficiency, and achieve the effect of reducing fiber consumption, improving economy, and increasing contact area

Inactive Publication Date: 2019-10-22
718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the current chemical precipitation method is difficult to meet the requirements of environmental protection, and the existing fiber treatment method is high in cost and low in efficiency, the present invention provides a method for using fiber to treat and recover waste water containing heavy metals. The method is based on the kinetic adsorption equation and selects an appropriate amount of The fiber undergoes a cycle of wastewater adsorption, desorption and regeneration from high concentration to low concentration. This method can quickly and efficiently process and recover heavy metal ions in wastewater, greatly saving the time of adsorption and the entire treatment cycle, and improving economic benefits.

Method used

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  • Method for treating and recovering heavy metal-containing wastewater by fiber
  • Method for treating and recovering heavy metal-containing wastewater by fiber
  • Method for treating and recovering heavy metal-containing wastewater by fiber

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Experimental program
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Embodiment 1

[0043] Water sample profile: select an electronics factory in Anhui with pH=1.3 containing Cu 2+ Wastewater, 100 tons of discharge per day, application of atomic emission spectrometry to measure the content of various types of metal cations contained in this waste water, listed in Table 1.

[0044] Table 1

[0045] Ion species Cu 2+

Ni 2+

Ca 2+

Mg 2+

Fe 2+ / Fe 3+

Content (mg / L) 784.2 4.6 4.1 4.7 1.1

[0046] Table 1, Cu 2+ and Ni 2+ It is a heavy metal ion, and its national emission standard is 1mg / L.

[0047] Main properties of the fiber: The PAN-PEI amine-based chelating fiber developed by the No. 718 Research Institute of China Shipbuilding Industry Corporation (has been disclosed in Chinese patent application 201711497099.0) was selected to treat the above wastewater. 2+ The suitable adsorption pH range is 5-6, the saturated adsorption capacity is 330mg / g, and the half-saturated adsorption time is 3.17min.

[0048...

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Abstract

The invention relates to a method for treating and recovering heavy metal-containing wastewater by using a fiber, and belongs to the technical field of heavy metal-containing wastewater treatment andrecovery. The method is based on the kinetic adsorption equation, an appropriate amount of the fiber is used to adsorb the wastewater in gradient from a high concentration to a low concentration, themoving direction of the fiber is opposite to the moving direction of the wastewater, and the fiber that achieves the optimal adsorption state is desorbed and regenerated, and then can be reused, so the method can quickly and efficiently treat and recover heavy metal ions in the wastewater, greatly save time of the adsorption and the entire treatment cycle and improve economic benefits.

Description

technical field [0001] The invention relates to a method for treating and recycling heavy metal-containing wastewater by using fiber, and belongs to the technical field of heavy metal-containing wastewater treatment and recovery. Background technique [0002] Heavy metals are difficult to degrade in nature, and have strong concealment and enrichment properties. Irrigation of farmland with wastewater containing heavy metals will affect the yield and quality of crops, and in severe cases, crops will fail. Heavy metals are extremely harmful to humans. Aquatic animals and plants ingest heavy metals from polluted water bodies and accumulate them in the body, enter the human body through the food chain, and accumulate in certain organs of the human body to cause chronic poisoning. Modern medical research shows that some heavy metal ions entering the human body can cause cancer, teratogenicity, and chromosomal mutation, and the incubation period can reach decades. In recent years,...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F9/04C02F101/20
CPCC02F9/00C02F2101/20C02F1/28C02F1/001C02F1/52C02F1/66C02F1/42C02F2301/08C02F2303/16
Inventor 陈兆文苗雷刘大鑫李勇华刘跃旭白振光
Owner 718TH RES INST OF CHINA SHIPBUILDING INDAL CORP