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Method for producing sawdust xanthogenate using sawdust and for treating heavy metal waste water using it

A xanthate and heavy metal technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of high manufacturing cost, achieve low cost, high purification efficiency, good economical effect

Inactive Publication Date: 2006-05-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Treatment of heavy metal wastewater with insoluble starch xanthate has been reported, but its treatment and manufacturing costs are high

Method used

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  • Method for producing sawdust xanthogenate using sawdust and for treating heavy metal waste water using it
  • Method for producing sawdust xanthogenate using sawdust and for treating heavy metal waste water using it
  • Method for producing sawdust xanthogenate using sawdust and for treating heavy metal waste water using it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Effect of Alkalinization Concentration on Properties of Sawdust Xanthate

[0040] Take 3g of wood chips, alkalize them with sodium hydroxide solutions with mass concentrations of 10%, 15%, 20%, 25%, and 30%, and add 1.5ml of CS 2 , and reacted for 2 hours at 30°C. The copper ion wastewater with an initial concentration of 25.0 mg / L was treated with synthetic wood chip xanthate, stirred and reacted for 30 minutes, and the concentration of copper ions after the reaction was measured. The measured removal rates of copper ions are: 96.5%, 97.4%, 98.3%, 95.6% and 95%.

Embodiment 2

[0041] Example 2: Effect of alkalization time on properties of wood chip xanthate

[0042] Take 3g sawdust, in alkali concentration 20%, CS 2 The addition amount is 1.0ml, the yellowing reaction temperature is 30°C, and the yellowing reaction time is 2 hours. The alkalization time is 6, 12, 24, 36, and 48 minutes, and the initial concentration of the synthetic wood chip xanthate is 25.00 mg / For the copper ion solution of L, the removal rates of copper ions are respectively: 92.4%, 93.6%, 97.2%, 96.0%, 95.2%.

Embodiment 3

[0043] Example 3: CS 2 Effects of dosage on properties of wood chip xanthate

[0044] Take 3g of sawdust, soak it for 24h under the condition of 20% alkali concentration, and react it for 2.0 hours under the condition of 30℃, CS 2 The dosages are: 0.1667, 0.3333, 0.5000, 0.6667, 0.8333ml / g, and the prepared SCX respectively treats the initial concentration C 0 = 25.0mg / L copper ion solution, the removal rates of heavy metal ions after treatment are: 99.3%, 99.39%, 99.86%, 99.35%, 99.27%.

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Abstract

The invention provides a xanthate produced by bits of wood and a method for processing heavy metal waste water by it, belonging to the technical fields of medicament and heavy metal waste water processing. Its producing method: screening the bits of dry wood with a sieve of an aperture 1mm-0.8mm; soaking the screened bits of dry wood in NaOH solution of a mass concentration 10%-30%, press ¿Cfiltering and dehydrating to obtain basified fiber; adding CS2 into the solution for reacting; making conversion reaction by soluble magnesium salt, adding dilute magnesium salt solution, alcohol and acetone, pump-filtering, press-drying and drying to obtain thexanthate. The method for processing heavy metal waste water: taking the waste water containing heavy metallic ions, blending, filtering and dehydrating. The advantages of the invention: by thexanthate, the removal ratio of heave metal is up to 95%.

Description

technical field [0001] The invention belongs to the technical field of medicament preparation and heavy metal wastewater treatment, and in particular provides a xanthate produced from sawdust and a method for treating heavy metal wastewater. The adsorption performance of sawdust xanthate is used to achieve harmless treatment of heavy metal wastewater. Background technique [0002] The traditional treatment methods of heavy metal wastewater mainly include neutralization method, sulfuration method, ion exchange method, reduction method, adsorption method, reverse osmosis method, solvent extraction method, biological method and flotation method. In view of the large concentration difference of heavy metal ion wastewater, complex components, and very strict treatment standards, traditional wastewater treatment technologies show that the use of treatment agents is large, the price is expensive, the reaction is not easy to control, the reaction is slow and the effect is not ideal....

Claims

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Application Information

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IPC IPC(8): C07C327/36C02F9/00
Inventor 孙春宝林海宋波汪作胜李秋华
Owner UNIV OF SCI & TECH BEIJING
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