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Water treatment method using stainless steel nanotube arrays

A nanotube array, stainless steel technology, applied in water/sewage treatment, light water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of huge economic burden of treatment cost and time, complicated treatment process, etc.

Active Publication Date: 2021-04-16
IUCF HYU (IND UNIV COOP FOUND HANYANG UNIV)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such additional equipment or steps complicate the processing, which creates a huge economic burden in terms of processing cost and time

Method used

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  • Water treatment method using stainless steel nanotube arrays
  • Water treatment method using stainless steel nanotube arrays
  • Water treatment method using stainless steel nanotube arrays

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0070] The stainless steel (304L) film was cut into a size of 10 mm × 10 mm, which is favorable for anodic oxidation and electroreduction. Remove possible impurities such as organic substances from the surface of the stainless steel film by physical / chemical etching. Clean the etched stainless steel film with distilled water and ethanol. Sandpaper was used for physical etching, and a solution of hydrofluoric acid, nitric acid, and distilled water (1:4:5, v / v / v) was used for chemical etching. Chemical etching was performed within 30 seconds to prevent the formation of metal defects and the generation of toxic gases caused by hydrogen embrittlement. Formation of nanotubes on a stainless steel surface pretreated using an anodizing system. A 5% by volume solution of perchloric acid (70%) in ethanol was used as electrolyte for the anodic oxidation. Anodizing was performed using a power supply system (EP1605, PNCYS) under constant voltage conditions. A thin film of stainless ste...

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Abstract

Water treatment devices and methods using arrays of stainless steel nanotubes are disclosed. According to the water treatment apparatus and method, a pH and temperature stable stainless steel nanotube array having an increased specific surface area is used as a photocatalyst. Unlike the use of existing photocatalysts, the use of stainless steel nanotube arrays eliminates the need for limiting external environmental factors. Stainless steel nanotube arrays are used in combination with UV light and hydrogen peroxide. This combination is very effective in degrading pollutants with high efficiency. The water treatment apparatus and method do not require additional equipment, helping to reduce initial equipment costs. The stainless steel nanotube arrays are largely immune to loss and damage during oxidation. Therefore, continuous water purification is feasible and can greatly reduce the cost of production, management and water treatment. In addition, the stainless steel nanotube arrays are much less corrosive and toxic than conventional photocatalysts, and prevent the possibility of secondary pollution. Thus, the apparatus and method achieve environmentally friendly water treatment.

Description

technical field [0001] The present invention relates to an efficient water treatment method using arrays of stainless steel nanotubes. More specifically, the present invention relates to water treatment methods for the efficient removal of pollutants from water systems using stainless steel nanotube arrays prepared by anodizing stainless steel surfaces to form nanotubes. Background technique [0002] With recent rapid industrial development, environmental pollution has become a serious problem. Various schemes have been developed to provide solutions to environmental pollution problems. Specifically, increased domestic waste and industrial wastewater are responsible for the release of large amounts of persistent pollutants into water systems. Such persistent pollutants cause severe pollution of water resources, making it difficult to provide clean water. Under these circumstances, there is an increasing demand for water treatment equipment capable of effectively preventin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/32C02F1/72
CPCC02F1/32C02F1/722C02F1/725C02F1/74C02F2305/026C02F2305/10
Inventor 朴宰佑李翰旭吴泰协
Owner IUCF HYU (IND UNIV COOP FOUND HANYANG UNIV)
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