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Method for treating activated carbon adsorbing cyanide

A treatment method and activated carbon technology, applied in chemical instruments and methods, separation methods, other chemical processes, etc., can solve problems such as high cost and injury to surrounding personnel, and achieve the effect of significant economic benefits and simple treatment process.

Active Publication Date: 2019-02-01
SHANXI XINHUA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These untreated poisoned filter elements have been releasing toxic and harmful substances outward, causing harm to people around at any time
My unit has contacted external units to deal with it, but the cost is high and it has not been resolved yet

Method used

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  • Method for treating activated carbon adsorbing cyanide
  • Method for treating activated carbon adsorbing cyanide

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Embodiment Construction

[0010] Specific embodiments of the present invention will be described in detail below.

[0011] 1. Principle description

[0012] During the adsorption process of activated carbon, both the adsorbate and the solvent are adsorbed. Due to the difference in affinity, after a certain period of adsorption, the adsorption equilibrium is reached. Waste activated carbon treatment is to take measures to destroy this balance. The laboratory mainly uses the extraction method to deal with the toxic components in the poisoned activated carbon.

[0013] According to the nature of the toxic agent adsorbed by the activated carbon, a solvent with high solubility to the toxic agent and low solubility to other components is selected to dissolve the toxic agent from the pores of the activated carbon. Extraction is a mass transfer process based on diffusion theory. When the poisoned activated carbon is soaked in the container and is in a static state, it belongs to the process of molecular diff...

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Abstract

The invention discloses a method for treating activated carbon adsorbing cyanide. The method comprises: 1. putting activated carbon subjected to the cyanide chloride and hydrocyanic acid protection time test in a beaker, adding 400mL of deionized water into each 100g of activated carbon, weighing 10g of calcium hypochlorite, adding the calcium hypochlorite into the solution along with stirring, adding 0.05g of sodium hydroxide into the system in each process until pH of 10, putting the breaker into an ultrasonic oscillator, adjusting power to 250w, carrying out vibration for 60min, adding a monopotassium phosphate-sodium hydroxide buffer solution into the system, adjusting pH to 6.0, adjusting power to 250w and carrying out vibration for 60min, and 2, adding a filtered sample into deionized water and carrying out secondary extraction so that the cyanide content of activated carbon is less than or equal to 0.015mg / g and the cyanide content of the waste liquid is less than or equal to 0.5mg / L. The method realizes integration of the waste liquid treatment and the non-toxic treatment on poisoned activated carbon, has simple and cheap treatment processes and prevents the secondary pollution of the treated wastes.

Description

technical field [0001] The invention belongs to the technical field of poisoned activated carbon treatment, and in particular relates to a treatment method for activated carbon after adsorbing cyanide. Background technique [0002] At present, impregnated carbon, canisters and filter absorbers must be sampled and tested for anti-virus performance before they can be delivered for use. Impregnated carbon, canisters and filter absorbers that have passed the anti-virus performance test are contaminated with chemical agents and cannot be directly discarded as experimental waste or landfill. The activated carbon and impregnated carbon in our unit's current inventory of poisoned filter elements are roughly calculated to exceed 5t, and with the expansion of the company's production and operation scale, the annual production of poisoned activated carbon and impregnated carbon continues to increase, and only in 2015 passed the anti-virus performance test. The rough calculation of poi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/20
CPCB01J20/20B01J20/3416B01J20/3475
Inventor 温维丽郭晶晶梁亚玲王桃胡玉良张素红韩万飞乔学明刘力王晶李显富王娜乔锦瑞赵卯青魏学青王勇张建国
Owner SHANXI XINHUA CHEM
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