Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for removing organic arsenic in water through synchronous oxidation and in-situ adsorption

A technology for organic arsenic and water removal, applied in chemical instruments and methods, adsorption water/sewage treatment, oxidized water/sewage treatment, etc. Large specific surface area, efficient adsorption and removal effect

Pending Publication Date: 2020-06-26
HARBIN INST OF TECH +1
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention aims at the organic arsenic pollutants in water, especially the problem that the organic arsenic in the source water of a large-scale drinking water arsenic removal water plant cannot realize synchronous oxidation and in-situ adsorption removal, and to provide a simple operation, high performance and economical A method that is feasible and easy to apply on a large scale in engineering by synchronous oxidation and in-situ adsorption of ferric salt and persulfate to remove organic arsenic in water

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
  • Method for removing organic arsenic in water through synchronous oxidation and in-situ adsorption
  • Method for removing organic arsenic in water through synchronous oxidation and in-situ adsorption
  • Method for removing organic arsenic in water through synchronous oxidation and in-situ adsorption

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0043] Specific embodiment one: a kind of synchronous oxidation and in-situ adsorption method of removing organic arsenic in the present embodiment, it is carried out according to the following steps:

[0044] Add ferrous salt and persulfate to arsenic-containing water to realize simultaneous oxidation degradation and in-situ adsorption to remove organic arsenic in water, wherein the molar ratio of ferrous salt and persulfate is: 1:0.8-4.

[0045] In this embodiment, the total arsenic concentration can be detected by an inductively coupled plasma atomic emission spectrometer (ICP-OES) or an inductively coupled plasma mass spectrometer (ICP-MS), and the separation and determination of organic arsenic and inorganic arsenic can be performed by high performance liquid chromatography. Combined with inductively coupled plasma mass spectrometry (LC-ICP-MS) detection.

[0046] This embodiment adopts divalent iron salt (Fe 2+ ) activating the persulfate to treat the organic arsenic in...

specific Embodiment approach 2

[0047] Embodiment 2: This embodiment differs from Embodiment 1 in that the arsenic-containing water is organic arsenic and / or inorganic arsenic. Others are the same as in the first embodiment.

[0048] The method in this embodiment is mainly aimed at organic arsenic, but the method is also applicable to inorganic arsenic or a mixture of the two, and can still achieve the technical effect described in the present invention.

[0049] Verify the beneficial effects of the present invention through the following examples:

Embodiment 1

[0051] A method for removing organic arsenic in water by synchronous oxidation and in-situ adsorption of the present embodiment comprises the following steps: adding 100 μmol of ferrous sulfate and 75 μmol of potassium peroxodisulfate to 1 L of water containing p-aminophenylarsine, The concentration of aminophenylarsine is 5 μmol / L, the pH is 3, and the temperature is 25°C. After stirring for 30 minutes, adjust the pH to 6, and filter through a 0.22 μm cellulose acetate membrane to complete the removal of arsenic in water. After testing, 90.3% of p-aminophenylarsine was oxidatively degraded, the removal rate of total arsenic was 99.4%, and the content of remaining total arsenic was 2.25 μg / L, which was lower than that specified in the Hygienic Standard for Drinking Water (GB5749-2006). The specified limit of arsenic concentration in water (10μg / L).

[0052] Compared with CN 109942070A patent, the condition of pH=3 in this embodiment, and the minimum pH of CN 109942070A patent ...

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 treatment method of water containing organic arsenic, and discloses a method for removing organic arsenic in water through synchronous oxidation and in-situ adsorption. According to the method, organic arsenic pollutants in water are solved; particularly, a problem that organic arsenic in water source water of a large-scale drinking water arsenic removal water plant cannot be synchronously oxidized and adsorbed and removed in situ is solved. The method comprises the following steps: adding a divalent iron salt and persulfate into water containing organic arsenic to realize synchronous oxidative degradation and in-situ adsorption removal of organic arsenic in water, and the molar ratio of the divalent iron salt to the persulfate is 1:(0.8-4). The method disclosedby the invention is simple in process operation, wide in applicable water quality condition, capable of efficiently removing representative organic arsenic that is p-arsanilic acid contained in water,and particularly suitable for removing organic arsenic in water source water of large-scale drinking water arsenic removal water plants. The method is applied to the field of arsenic removal.

Description

technical field [0001] The invention relates to a treatment method for water containing organic arsenic, in particular to a method for removing organic arsenic represented by p-aminophenylarsine, especially an application method for removing trace and trace organic arsenic in drinking water. Background technique [0002] Organic arsenic such as p-aminophenylarsine acid (alsanic acid), 3-nitro-4-hydroxyphenylarsine acid (roxarsone) has been widely used as a feed additive for pigs, chickens and other livestock and poultry as synthetic antibacterial agents. They have the function of killing bacteria, protozoa and spirochetes, and can promote the growth of livestock and poultry and improve feed efficiency. However, these organic arsenic will hardly be decomposed in animals, and most of them will be excreted through feces. Most of the aquaculture wastewater is simply treated or discharged directly without treatment, resulting in the discharge of more than several thousand tons o...

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
IPC IPC(8): C02F1/72C02F1/28C02F101/10C02F101/38
CPCC02F1/725C02F1/281C02F2101/38C02F2101/103
Inventor 马军王盼新江进程海军何旭纪润灵丁健
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com