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Method for treating Cr3+-containing wastewater by using expanded vermiculite

A technology for expanding vermiculite and wastewater, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of incomplete extraction, high cost, secondary pollution, etc. Good adsorption performance, achieve the effect of harmless treatment

Pending Publication Date: 2020-09-25
阿拉尔市中泰纺织科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods all have problems such as high cost, incomplete removal, and easy to cause secondary pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of utilizes expanded vermiculite to deal with containing Cr 3+ way of waste water. Including the following steps:

[0030] A. Take expanded vermiculite with a diameter of 0.3m and a weight of 1.5kg, add 10L deionized water, and pass through the ultrasonic frequency of 60MHz and 8W / cm 2 After ultrasonic intensity treatment for 20min, vermiculite nanosheet suspension was obtained;

[0031] B, the hydrochloric acid of described vermiculite nanosheet suspension obtained in step A with 0.2mol / L, the sodium bicarbonate of 0.15mol / L adjusts pH to 7;

[0032] C, adding 0.005g humic acid to the vermiculite nanosheet suspension adjusted by pH in step B, after stirring, obtain the vermiculite that adsorbs humic acid, the frequency of stirring is 100~500r / min, and the stirring time is 20~40min;

[0033] D. Put the adsorbed humic acid vermiculite in step C into 100L containing Cr 3+ In the waste water, then set two opposing copper plates in the waste water to apply an ele...

Embodiment 2

[0036] A kind of utilizes expanded vermiculite to deal with containing Cr 3+ way of waste water. Including the following steps:

[0037] A. Take expanded vermiculite with a diameter of 0.2m and a weight of 1.1kg, add 10L of deionized water, and pass through the ultrasonic frequency of 60MHz and 8W / cm 2 Obtain the vermiculite nanosheet suspension after ultrasonic intensity treatment for 20min;

[0038] B, the hydrochloric acid of described vermiculite nanosheet suspension obtained in step A with 0.2mol / L, the sodium bicarbonate of 0.15mol / L adjusts pH to 7;

[0039] C, adding 0.005g humic acid to the vermiculite nanosheet suspension adjusted by pH in step B, after stirring, obtain the vermiculite that adsorbs humic acid, the frequency of stirring is 100~500r / min, and the stirring time is 20~40min;

[0040] D. Put the adsorbed humic acid vermiculite in step C into 100L containing Cr3+ In the waste water, then set two opposing copper plates in the waste water to apply an elect...

Embodiment 3

[0043] A kind of utilizes expanded vermiculite to deal with containing Cr 3+ way of waste water. Including the following steps:

[0044] A. Take expanded vermiculite with a diameter of 0.26m and a weight of 1.4kg, add 10L of deionized water, and use 60MHz ultrasonic frequency and 8W / cm 2 Obtain the vermiculite nanosheet suspension after ultrasonic intensity treatment for 20min;

[0045] B, the hydrochloric acid of described vermiculite nanosheet suspension obtained in step A with 0.2mol / L, the sodium bicarbonate of 0.15mol / L adjusts pH to 7;

[0046] C, adding 0.005g humic acid to the vermiculite nanosheet suspension adjusted by pH in step B, after stirring, obtain the vermiculite that adsorbs humic acid, the frequency of stirring is 100~500r / min, and the stirring time is 20~40min;

[0047] D. Put the adsorbed humic acid vermiculite in step C into 100L containing Cr 3+ In the waste water, then set two opposing copper plates in the waste water to apply an electric field, th...

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PUM

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Abstract

The invention belongs to the field of sewage treatment methods, and particularly relates to a method for treating Cr3+-containing wastewater by using expanded vermiculite. The method comprises the following steps: adding expanded vermiculite into deionized water, carrying out ultrasonic treatment to obtain a vermiculite nanosheet suspension, and adjusting the pH value of the vermiculite nanosheetsuspension to 6.5-7.5 by using an adjusting reagent; adding humic acid into the vermiculite nanosheet suspension liquid subjected to pH adjustment, and stirring the mixture to prepare the vermiculiteadsorbing humic acid; finally, putting the vermiculite adsorbing humic acid into Cr3+-containing wastewater, and taking out the vermiculite after centrifugal treatment to obtain treated Cr3+-containing wastewater. Humic acid is adsorbed to the surface of vermiculite; more functional groups such as polyaromatic groups and the like can be formed to react with Cr3+, so that the treatment of Cr3+-containing wastewater is realized, the Cr3+ content in the wastewater is reduced, harmless treatment of the wastewater is realized, and the method cannot be achieved by high-cost and side-effect methods such as treatment of the wastewater by reagents at present.

Description

technical field [0001] The invention belongs to the method field of sewage treatment, and in particular relates to a treatment method containing Cr by using expanded vermiculite. 3+ way of waste water. Background technique [0002] Heavy metal wastewater mainly comes from wastewater discharged from mining, metallurgy, chemical industry, electroplating, leather and other industries and filtrate from solid waste landfills, while Cr 3+ It is the main component in heavy metal wastewater, and the Cr-containing 3+ The discharge of waste water into the environment will cause irreparable damage to the environment. Heavy Metal Cr in Wastewater 3+ It can enter aquatic organisms along with suspended solids, enter the human body through the food chain (net), and accumulate in the human body. When heavy metals are absorbed by the human body, in addition to existing as a single ion, they can also combine with proteins, amino acids, fatty acids, nucleic acids, and phosphoric acid in th...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/22
CPCB01J20/24C02F1/286C02F2101/22
Inventor 李建军姜小刚王亮冯建军吴宏辉刘润利袁飞
Owner 阿拉尔市中泰纺织科技有限公司