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A preparation method and application of an adsorbent for treating lead-containing wastewater

An adsorbent and waste water technology, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve problems such as failure to meet effluent standards, difficulty in desorption of waste materials, increase in treatment costs, etc., and achieve project cost Low, conducive to automatic control and mechanization, and easy to implement

Active Publication Date: 2017-01-04
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following disadvantages: (1) It requires corresponding sewage treatment facilities, which increases the treatment cost; (2) The treated wastewater only meets the reuse standard, but does not meet the discharge standard
However, this method has the following disadvantages: (1) When the amount of adsorbent is large, the raw materials are not easy to obtain; (2) It is difficult to desorb the waste after treatment
However, there is no report on the treatment of lead-acid battery (lead-containing) wastewater by using the modified material adsorbent prepared by sodium dodecylbenzenesulfonate combined with phosphogypsum at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Use distilled water to fully wash the phosphogypsum to remove impurities. After vacuum filtration, the sample is placed in a box-type muffle furnace, and the temperature is programmed to rise (5 ° C per hour, until 160 ° C). Heating for 14 hours, grinding phosphogypsum through a 120-mesh sieve to obtain a pretreated phosphogypsum sample;

[0023] (2) Dissolve 4g of sodium dodecylbenzenesulfonate in 12g of ethanol and stir at 20°C for 0.2h to obtain an organic modification solution;

[0024] (3) Add 6g of pretreated phosphogypsum to 30mL of the organic modification solution obtained in step (2) to prepare a semi-dry reaction material, place it in a flat-bottomed glass vessel, spread it evenly, and let it stand for 20 minutes. The good semi-dry reactants were put into an ultrasonic reactor, and the reaction time was 25 minutes. During the reaction process, the ethanol solution gradually evaporated and the samples gradually became dry. The samples were taken out, groun...

Embodiment 2

[0027] (1) Use distilled water to fully wash the phosphogypsum to remove impurities. After decompression and suction filtration, the sample is placed in a box-type muffle furnace, and the temperature is programmed (8 ° C per hour, until 160 ° C). Heating for 16 hours, grinding phosphogypsum through a 160-mesh sieve to obtain a pretreated phosphogypsum sample;

[0028] (2) Dissolve 4g of sodium dodecylbenzenesulfonate in 16g of ethanol and stir at 25°C for 0.6h to obtain an organic modification solution;

[0029] (3) Add 8g of pretreated phosphogypsum to 30mL of the organic modification solution obtained in step (2) to prepare a semi-dry reaction material, place it in a flat-bottomed glass vessel, spread it evenly, and let it stand for 40 minutes. The good semi-dry reactant was put into an ultrasonic reactor, and the reaction time was 30 minutes. During this reaction process, the ethanol solution gradually evaporated and the sample gradually became dry. The sample was taken out...

Embodiment 3

[0032] (1) Use distilled water to fully wash the phosphogypsum to remove impurities. After decompression and suction filtration, the sample is placed in a box-type muffle furnace, and the temperature is programmed (10 ° C per hour, until 160 ° C). Heating for 18 hours, grinding phosphogypsum through a 180-mesh sieve to obtain a pretreated phosphogypsum sample;

[0033] (2) Dissolve 4g of sodium dodecylbenzenesulfonate in 20g of ethanol and stir at 28°C for 1.2h to obtain an organic modification solution;

[0034] (3) Add 12g of pretreated phosphogypsum to 30mL of the organic modification solution obtained in step (2) to prepare a semi-dry reaction material, place it in a flat-bottomed glass vessel, spread it evenly, and let it stand for 60 minutes. The good semi-dry reactant was put into the ultrasonic reactor, and the reaction time was 35 minutes. During this reaction process, the ethanol solution gradually evaporated and the sample gradually became dry. The sample was taken ...

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Abstract

The invention relates to a preparation method and application of an adsorbent for treating lead-containing waste water, and belongs to the technical field of heavy metal wastewater treatment. The preparation method comprises the following steps: performing pretreatment on phosphogypsum, modifying phosphogypsum by adopting a sodium dodecyl benzene sulfonate modification technology, and performing ultrasonic treatment. The adsorbent prepared by the method can realize chemical complexation reaction with heavy metal lead ions in waste water, so as to remove the heavy metal lead ions. Phosphogypsum has a large specific surface area, and the treated phosphogypsum subjected to further improvement of the method has a relatively high adsorption capacity, so that the adsorbent becomes an excellent adsorbing material for removing lead ions. The adsorbent prepared by the invention is good in stability and high in adsorption capacity, and treated lead-containing waste water can reach discharge requirements on lead of national Integrated Wastewater Discharge Standard (GB8978-1996).

Description

technical field [0001] The invention relates to a preparation method and application of an adsorbent for treating lead-containing wastewater, and belongs to the technical field of heavy metal wastewater treatment. Background technique [0002] In the ecological water environment, the main sources of lead-containing wastewater are industrial wastewater discharged from electroplating, smelting, casting, pesticides, mining, dyes, petroleum, batteries, machinery, printing and other industries, and the deposition of lead-containing particles in the air in water bodies. The battery industry is the main source of lead-containing wastewater. According to reports, the loss of lead per battery produced is 4.54~6810 mg, followed by the petroleum industry producing gasoline additives. Lead belongs to the first category of water pollutants. According to national regulations, the total lead content of lead-containing wastewater must reach the maximum allowable concentration discharge stan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/62
CPCB01J20/223B01J20/3085C02F1/285C02F1/62
Inventor 宁平杨月红石磊程杨张怀予于珊珊
Owner KUNMING UNIV OF SCI & TECH
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