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Method for treating industrial wastewater containing metal ions

A technology for industrial wastewater and treatment methods, which is applied in water/sewage treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of heavy metal ions that are difficult to completely remove and have poor effects, and achieve improved Stabilizing effect, enhanced adsorption effect, effect of improving contact ability

Inactive Publication Date: 2020-02-11
柏威达(南京)环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the treatment effect of heavy metal ions by adsorption method is poor, and raw materials such as activated carbon and silica gel are often used in the treatment, and it is difficult to completely remove heavy metal ions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of metal ion-containing industrial wastewater treatment method of the present embodiment comprises the following steps:

[0028] Step 1, preparation of activated carbon: put biochar into ammonia water first, then add dysprosium chloride and lanthanum chloride to it, then stir at 500r / min for 20min, then add 1mol of permanganate Potassium, continue to stir at a low speed of 100r / min for 3h, after stirring, centrifuge, wash, and filter to obtain activated carbon;

[0029] Step 2, modification of bentonite: Add bentonite to sodium citrate for ultrasonic dispersion for 20 minutes, then wash, then add it to hydrochloric acid for ultrasonic dispersion for 10 minutes, and finally add deionized water for ultrasonic dispersion for 30 minutes. The ultrasonic power is 200W. end, then ion, dry;

[0030] Step 3, preparation of bentonite filler: add the modified bentonite and loading aid to the calciner at a weight ratio of 5:1 for calcination treatment, the calcination time ...

Embodiment 2

[0041] A kind of metal ion-containing industrial wastewater treatment method of the present embodiment comprises the following steps:

[0042] Step 1, preparation of activated carbon: put biochar into ammonia water first, then add dysprosium chloride and lanthanum chloride to it, then stir at 1000r / min for 30min, then add 5mol of permanganate Potassium, continue stirring at a low speed of 200r / min for 6h, after stirring, centrifuge, wash, and filter to obtain activated carbon;

[0043] Step 2, modification of bentonite: Add bentonite to sodium citrate for ultrasonic dispersion for 30 minutes, then wash, then add it to hydrochloric acid for ultrasonic dispersion for 20 minutes, and finally add deionized water for ultrasonic dispersion for 40 minutes, ultrasonic power is 500W, ultrasonic end, then ion, dry;

[0044] Step 3, preparation of bentonite filler: add the modified bentonite and loading aid to the calciner at a weight ratio of 5:1 for calcination treatment, the calcinatio...

Embodiment 3

[0054] A kind of metal ion-containing industrial wastewater treatment method of the present embodiment comprises the following steps:

[0055] Step 1, preparation of activated carbon: put the biochar into ammonia water first, then add dysprosium chloride and lanthanum chloride to it, then stir at 750r / min for 25min, then add 3mol of permanganate Potassium, continue stirring at a low speed of 150r / min for 4.5h, after stirring, centrifuge, wash, and filter to obtain activated carbon;

[0056] Step 2, modification of bentonite: Add bentonite to sodium citrate for ultrasonic dispersion for 25 minutes, then wash, then add it to hydrochloric acid for ultrasonic dispersion for 15 minutes, and finally add deionized water for ultrasonic dispersion for 35 minutes. The ultrasonic power is 350W. end, then ion, dry;

[0057] Step 3, preparation of bentonite filler: add the modified bentonite and loading aid to the calciner at a weight ratio of 5:1 for calcination treatment, the calcinatio...

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Abstract

The invention discloses a method for treating industrial wastewater containing metal ions. The method comprises the following steps: 1, preparing activated carbon: feeding biochar into ammonia water,dropwise adding dysprosium chloride and lanthanum chloride into the ammonia water, performing stirring at a rotating speed of 500-1000 r / min for 20-30 min, adding 1-5 mol of potassium permanganate, continuously stirring at a low rotating speed of 100-200 r / min for 3-6 h, and carrying out centrifuging, washing and filtering after the stirring is finished to obtain the activated carbon. The activated carbon adopts the biochar as a base material, the biochar has a loose porous structure and high porosity, and can be excited and activated by the dysprosium chloride and lanthanum chloride in the ammonia water to enhance the adsorption effect of the biochar, the added potassium permanganate has oxidability and can be used for maintaining the biochar to improve the stability of the activated carbon in wastewater, and the activated carbon cooperates with bentonite to achieve a synergistic effect.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a method for treating industrial wastewater containing metal ions. Background technique [0002] Industrial wastewater refers to the wastewater and waste liquid discharged during the process of production, which contains industrial production materials, intermediate products, by-products and pollutants generated in the production process that are lost with water. It is an important cause of environmental pollution, especially water pollution. reason. Although the treatment of industrial wastewater started as early as the end of the 19th century, due to the complex composition and changeable nature of many industrial wastewater, there are still some technical problems that have not been completely resolved. According to the chemical properties of the main pollutants contained in industrial wastewater, it can be divided into inorganic wastewater mainly cont...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/20
CPCC02F1/001C02F1/281C02F1/283C02F1/62C02F9/00C02F2101/20
Inventor 卢园园
Owner 柏威达(南京)环境科技有限公司
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