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Vanadium-containing sewage treatment method

A treatment method and wastewater technology, which is applied in the field of wastewater treatment containing chromium and ammonia nitrogen, can solve the problems of waste of raw materials and drugs, heavy processing workload, and substandard products, and achieve high-efficiency recycling, low equipment requirements, and simple and easy methods Use the effect

Inactive Publication Date: 2008-01-30
边绍贵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing methods for treating wastewater containing chromium or vanadium have shortcomings such as substandard products, waste of raw materials and medicines, heavy processing workload, and high energy consumption.

Method used

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  • Vanadium-containing sewage treatment method

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Experimental program
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Effect test

Embodiment 1

[0025] Embodiment one inventive method resin screening test

[0026] Commercially available anion exchange resins such as IRA96RF, 717 (D201×7), 711 (D201×4), D301, and D901 were used for pre-testing.

[0027] 100g IRA96RF, 717, 711, D301, D901 were used for static adsorption test respectively, and 1g.L was adsorbed under the respective optimal adsorption conditions -1 The vanadium liquid, when the adsorption rate reaches 98%, respectively use 3.0h, 3.5h, >5.0h, >5.0h, >5.0h.

[0028] Use 100g IRA96RF, 717, 711, D301, D901 to carry out the timed adsorption test respectively, and absorb 1g.L under the respective optimal adsorption conditions -1 The amount of vanadium adsorbed in the vanadium liquid was 7.3g, 7.3g, 4.7g, 4.7g, 4.8g after 3 hours.

[0029] Use 100g IRA96RF, 717, 711, D301, D901 to dynamically adsorb Cr respectively 6+ Adsorption under the respective optimal adsorption conditions, using the same concentration of chromium solution and passing through the resin c...

Embodiment 2

[0031] Embodiment two processes the solution containing vanadium and chromium with the inventive method

[0032] The pH value is about 2.5 and contains hexavalent chromium 200mg.L -1 , Pentavalent vanadium 34mg.L -1 The acidic vanadium-precipitating wastewater is passed to the exchange column equipped with 150g Rohm and Haas IRA96RF macroporous anion exchange resin adjusted to pH 2.5 and the flow rate is controlled to be 80ml.min -1 , a total of 30L of waste water was adsorbed, and V in the residual liquid was adsorbed 5+ -1 , Cr 6+ -1 , up to the national discharge standard, desorb with 40ml40% sodium hydroxide, then clean the resin with 40ml desorption solution containing chromium and vanadium with low concentration, and finally clean the resin slowly with 60ml water. About 30ml obtained at the beginning of desorption is vanadium chromium standard water, about 70ml of intermediate desorption is concentrated desorption solution, and the last 40ml is desorption solution wit...

Embodiment 3

[0035] Embodiment three processes the solution containing vanadium and chromium with the inventive method

[0036] The pH value is around 2.5 and contains 1.44g.L of hexavalent chromium -1 , Pentavalent vanadium 0.12g.L -1 The acidic vanadium-precipitated wastewater is passed to the exchange column equipped with 150g Rohm and Haas IRA96RF macroporous anion exchange resin adjusted to pH 2.5 and the flow rate is controlled to be 10ml.min -1 , a total of 4.0L of wastewater was adsorbed, and V 5+ -1 , Cr 6+ -1 , up to the national discharge standard, use 50ml of 28% ammonia water for desorption, then use 40ml of desorption solution containing chromium and vanadium with low concentration to slowly clean the resin, and finally use 60ml of water to slowly clean the resin. During desorption, about 30ml of vanadium-chromium standard water is desorbed at the beginning, about 70ml of desorbed in the middle is concentrated desorption solution, and the last 40ml is desorption solution w...

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Abstract

The invention pertains to an industrial wastewater treatment field, in particular relating to the treatment method of wastewater containing vanadium. The invention comprises the steps that: a. the PH value of wastewater containing chromium and vanadium is adjusted to be less than 7.0; b. the wastewater obtained after the step a is ensured to go through ion exchange resin column; c. strippant is added to the resin which is obtained after the step b to get stripping liquid; d. the vanadium-leaching treatment is done to the eluent obtained from the step c and filtrate and filter cake is gotten; e. chromium products is produced by processing the filtrate containing chrome obtaining from the step d; f. the filter cake obtained by molysite vanadium precipitation from the step d is immersed in alkali solution to get vanadium solution, then finishing ammonium vanadate precipitating treatment or hydrolysis vanadate precipitating treatment. The invention is simple and easy for use and operation, is of low demand for equipment, low manufacturing cost, which has good social and economic benefits, good market prospects.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment, and in particular relates to a wastewater treatment method containing chromium and ammonia nitrogen. Background technique [0002] The treatment and recovery of chromium and vanadium-containing wastewater, especially the vanadium-precipitated wastewater, is a major international problem today. Many manufacturers adopt the method of directly discharging slag or not recovering vanadium and chromium after reduction, which only removes harmful substances from different degrees. The liquid is transferred to the solid, and the harmful substances are not fundamentally treated and recovered. [0003] In the Chinese patent application "A Method for Extracting Vanadium by Resin Adsorption" with the application number of 98112468.2, a method for absorbing and extracting vanadium by directly immersing macroporous weakly basic anion exchange resin in vanadium-containing pulp is disclosed, and th...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/42C02F1/66C02F1/58C02F101/20
Inventor 边绍贵边红菊何大涛彭启惠
Owner 边绍贵
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