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A kind of pta industrial wastewater treatment method

A technology for industrial wastewater and treatment methods, applied in the direction of adsorption water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of unstable effects, unsatisfactory, high treatment costs, etc., and achieve treatment effects The effect of stability, low manufacturing cost and high efficiency

Inactive Publication Date: 2016-08-24
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have the problems of high processing cost and unstable effect.
Therefore, in addition to applying clean production and circular economy technologies to curb the use and discharge of heavy metals from the source, there is no ideal method for treating cobalt and manganese ions in PTA wastewater.

Method used

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  • A kind of pta industrial wastewater treatment method
  • A kind of pta industrial wastewater treatment method
  • A kind of pta industrial wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Preparation of modified tremolite adsorbent

[0022] Add 30% hydrogen peroxide solution to concentrated sulfuric acid at a rate of 10-20 drops / minute in a fume hood to obtain a piranha solution; the volume ratio of hydrogen peroxide solution to concentrated sulfuric acid in the piranha solution is 3:7, and the solution is completely cooled Then you can continue to use the following.

[0023] Take 200g of natural tremolite powder and immerse it in piranha solution at 80°C for 10 minutes. The amount of piranha solution is just enough to immerse the tremolite powder to modify the tremolite.

[0024] Then filter out the liquid, wash the obtained filter cake with a large amount of deionized water, and dry it at room temperature until the quality remains unchanged, so as to obtain the modified tremolite filter cake.

[0025] The modified tremolite filter cake is placed in a water / ethanol mixture with a volume ratio of 1:1 and ultrasonicated at 100W40KHz for 2 hours to reg...

Embodiment 2

[0033] In this embodiment, the optimal amount of adsorbent is determined through experiments.

[0034] Take 0.1g, 0.2g, 0.5g, 1.0, 1.5g, 2.0g of modified tremolite adsorbent, mix it with 100mL of PTA industrial wastewater, shake it at a constant temperature at 25°C for 50 minutes, filter it with suction, take the filtrate, and use atomic spectrometry A photometer measures the concentration of cobalt and manganese ions in the filtrate. The results are shown in Table 2.

[0035] Table 2

[0036] Adsorbent dosage (g)

[0037] It can be seen from Table 2 that the modified tremolite adsorbent is used to adsorb and treat cobalt and manganese ions in PTA industrial wastewater, and the optimal dosage for 100ml treatment volume is 0.1g-0.5g.

Embodiment 3

[0039] In this embodiment, the influence of pH value on the adsorption effect is determined through experiments.

[0040] Take 100mL of PTA industrial wastewater, add 0.1g of modified tremolite adsorbent, adjust the pH value, and after oscillating at a constant temperature for 50 minutes at 25°C, filter with suction, take the filtrate, and measure the concentration of cobalt-manganese ions in the filtrate with an atomic spectrophotometer, Calculate the removal rate.

[0041] The effect of pH value on the adsorption rate of cobalt and manganese is shown in Table 3.

[0042] table 3

[0043] pH value

[0044] It can be seen from Table 3 that the different pH values ​​in water have a great influence on the adsorption of cobalt and manganese ions. When the pH value is between 3 and 14, the removal rate of cobalt and manganese ions increases with the increase of the pH value. This is mainly because under acidic conditions, a large amount of H+ is adsorbed on the surfac...

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Abstract

The invention relates to a modified tremolite adsorbent and a PTA industrial waste water treatment method. The preparation method of the adsorbent comprises the following steps: preparing a piranha liquid; immersing tremolite powder into the piranha liquid at 75-85 DEG C for 8-12 minutes, wherein the dosage of the piranha liquid is determined by just immersing the tremolite powder; then filtering, taking out a filter cake, washing by deionized water until the mass of the filter cake is constant, drying at room temperature, thereby obtaining the modified tremolite filter cake; placing the modified tremolite filter cake into a water / alcohol mixed liquid with the volume ratio of 1:1, and carrying out ultrasound with 80-120W at 30-50KHz for 1.5-2.5 hours; filtering a liquid, washing the filter cake by distilled water until the mass is constant, then drying at 190-210 DEG C for 1.5-2.5 hours; and grinding the dried filter cake, and screening out powder of 80-100 meshes, thereby obtaining the modified tremolite adsorbent. According to the invention, the manufacturing cost is low; the modification method is simple and feasible; the adsorption rate of the modified adsorbent to cobalt and manganese ions in PTA industrial waste water reaches 99.00% above; and moreover, the efficiency is high, and the treatment effect is steady.

Description

technical field [0001] The invention relates to an adsorbent for waste water treatment and a waste water treatment method, in particular to a modified tremolite adsorbent and a PTA industrial waste water treatment method. Background technique [0002] PTA is the abbreviation of purified terephthalic acid, which is an important raw material and intermediate for the production of chemical products such as plasticizers, pesticides and dyes. Cobalt-manganese catalysts are generally used in the preparation of PTA, and a large amount of COD wastewater will be generated during the production process. The wastewater also contains cobalt-manganese ions, which need to be treated before being discharged. [0003] At present, the treatment of PTA industrial wastewater mainly involves the removal of COD, which basically does not involve the recovery of cobalt and manganese ions in the wastewater. [0004] Prior Art Three There are three main methods for treating heavy metals in wastewat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/10C02F1/28C02F101/20
Inventor 彭革万丽娟
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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