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Arsenic removal material by adsorption of electrochemistry strengthened nano ferro-manganese loaded carbon fiberand arsenic removal method by using same

A nano-iron-manganese, electrochemical technology, applied in chemical instruments and methods, inorganic chemistry, separation methods, etc., can solve the problem of low adsorption efficiency of trivalent arsenic, low recyclability of adsorbents, limited adsorption capacity of adsorbents, etc. It can improve the adsorption effect, reduce the dosing of chemical agents for elution, and promote the effect of arsenate desorption.

Active Publication Date: 2012-08-22
TSINGHUA UNIV
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Problems solved by technology

The present invention develops an enhanced adsorption and regeneration method by electrochemically strengthening the preparation of the loaded adsorbent, and solves technical and method problems such as low recyclability of the adsorbent, low adsorption efficiency of trivalent arsenic, and limited adsorption capacity of the adsorbent. Adsorption arsenic removal technology breakthrough and engineering application provide a breakthrough

Method used

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  • Arsenic removal material by adsorption of electrochemistry strengthened nano ferro-manganese loaded carbon fiberand arsenic removal method by using same
  • Arsenic removal material by adsorption of electrochemistry strengthened nano ferro-manganese loaded carbon fiberand arsenic removal method by using same
  • Arsenic removal material by adsorption of electrochemistry strengthened nano ferro-manganese loaded carbon fiberand arsenic removal method by using same

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Embodiment

[0032] In order to obtain nanometer-loaded iron-manganese carbon felts under different preparation conditions, an electric field is applied during the preparation, the positive electrode is connected to the reaction solution, the negative electrode is connected to the carbon felt, and the electricity is turned on immediately after adding the carbon felt. Change the voltage (0V, 2V, 5V, 10V) and starch concentration (5g / L, 10g / L, 15g / L, 20g / L, 30g / L), add starch and stir at 120rpm until the reaction solution becomes transparent , after which the KMnO 4 and FeSO 4 ·7H 2 O particles are mixed and ground into fine particles according to a molar ratio of 3:1 and added to the reaction solution. The added weight is 1L of the reaction solution plus 40g. NaOH solution is added to the reaction solution. After the addition, the concentration of sodium hydroxide is 0.1mol / L. Carry out redox reaction in 80°C aqueous solution for 1h, put the carbon felt loaded with iron and manganese into...

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Abstract

The invention discloses arsenic removal material by adsorption of electrochemistry strengthened carbon fiber loaded nano ferro-manganese and an arsenic removal method by using the material. The material comprises a substrate material and nano ferro-manganese oxidesloaded on the substrate material through electrochemistry and electro-deposition; the substrate material can be carbon fiber yarns, carbon fiber felts or graphite carbon fiber felts, and the shape of the substrate material is cylindrical or flat-shaped; and when a three-dimensional electrode is used, the substrate material is activecarbon. The arsenic removal material is prepared by performing ferro-manganese metal salt surface electro-deposition on the substrate material by electrifying. The arsenic removal method comprises the following steps of: carrying out coupling electro-absorption in the process of arsenic removal by chemical absorption, and strengthening the arsenic removal effect by using the electro-absorption action of a charging capacitor in the absorption process; applying reverse current to facilitate arsenic desorption on a surface of ferro-manganese hydrated oxide in a regeneration process, and simultaneously applying high voltage to perform hydrolysis, hydrogen generation and oxygen evolution so as to facilitate activity regeneration of the ferro-manganese oxide. With the adoption of the material and the method, the high absorption effect and the quick regeneration capability can be achieved.

Description

technical field [0001] The invention belongs to the application of electrochemistry and nanotechnology in the field of environment, and specifically relates to an electrochemically strengthened nano-iron-manganese-loaded carbon fiber adsorption and removal of arsenic material and method. Background technique [0002] The adsorption method mainly uses adsorbents with large effective surface area or adsorption groups to selectively remove arsenic in the form of arsenate / arsenite ions in water. This method introduces less impurity ions, has flexible application forms, and the material can be reused through regeneration, so it has become a hot spot in the current research on arsenic removal technology. Common adsorbents include iron and aluminum oxides, activated carbon, functional resins, rare earth elements, and various natural minerals. As the arsenic in groundwater is dominated by trivalent arsenic, the above-mentioned adsorbents have limited adsorption capacity for trivale...

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/469C02F1/28C02F1/58
Inventor 李广贺张旭李泽唐
Owner TSINGHUA UNIV
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