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Preparation method of adsorbent for heavy metal waste liquid treatment

A waste liquid treatment and adsorbent technology, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of limited adsorption and limited adsorption capacity, and achieve good synergy and low treatment cost The effect of reducing and shortening the processing cycle

Inactive Publication Date: 2017-04-26
CHANGSHA QIUDIANBING INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the adsorbent prepared by this patent has better adsorption to hexavalent chromium ions, while the adsorption capacity of other heavy metal ions is limited.
[0005] Literature "Banana peel and banana leaf on heavy metal Cd 2+ Research on the Adsorption Performance of Ions” (Zhang Cailing et al., Guangzhou Huagong, 2013, 41 (14): 52-55) discloses that banana peel and banana leaf are used as adsorption materials to adsorb heavy metal cadmium, but it is also limited to cadmium ions. Adsorption of a heavy metal ion

Method used

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  • Preparation method of adsorbent for heavy metal waste liquid treatment

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Embodiment 1

[0023] A preparation method for an adsorbent for heavy metal waste liquid treatment, comprising the steps of:

[0024] Mix pomelo peel and persimmon peel (mass ratio 1:1) and wash with water to obtain the mixture, then mix it with sodium hydroxide and water according to the mass ratio 1:0.1~0.2:1~2 for 6 hours , filtered to obtain the adsorbent, washed twice with water, then vacuum-dried at 60°C for 12 hours, crushed, sieved, and set aside.

[0025] The treatment method of the heavy metal waste liquid by the adsorbent is as follows: adjust the pH value of the heavy metal waste liquid to 6 with concentrated hydrochloric acid or concentrated ammonia water, add the obtained adsorbent, stir and mix, and let stand for 10 minutes; wherein, the adsorbent The mass volume ratio of heavy metal waste liquid is 1g:1L.

Embodiment 2

[0027] A preparation method for an adsorbent for heavy metal waste liquid treatment, comprising the steps of:

[0028] Mix pomelo peel and persimmon peel (mass ratio 1:2) and wash with water to obtain the mixture, then stir it with sodium hydroxide, potassium hydroxide or ammonium bicarbonate and water according to the mass ratio 1:0.2:2 Mix and react for 12 hours, filter to obtain the adsorbent, wash with water 3 times, then vacuum-dry at 80°C for 24 hours, crush, sieve, and set aside;

[0029] The treatment method of the heavy metal waste liquid by the adsorbent is: use concentrated hydrochloric acid or concentrated ammonia water to adjust the pH value of the heavy metal waste liquid to 7, add the obtained adsorbent, stir and mix, and let it stand for 15 minutes; wherein, the adsorbent The mass volume ratio of heavy metal waste liquid is 0.5g:1L.

Embodiment 3

[0031] A preparation method for an adsorbent for heavy metal waste liquid treatment, comprising the steps of:

[0032] Mix grapefruit peel and persimmon peel (mass ratio 1:1) and wash with water to obtain a mixture, then stir it with sodium hydroxide, potassium hydroxide or ammonium bicarbonate and water according to the mass ratio of 1:0.1:2 Mix and react for 6 hours, filter to obtain the adsorbent, wash with water for 3 times, then vacuum-dry at 60°C for 24 hours, crush, sieve, and set aside;

[0033] The treatment method of the heavy metal waste liquid by the adsorbent is as follows: adjust the pH value of the heavy metal waste liquid to 6 with concentrated hydrochloric acid or concentrated ammonia water, add the obtained adsorbent, stir and mix, and let stand for 15 minutes; wherein, the adsorbent The mass volume ratio of heavy metal waste liquid is 2g:1L.

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Abstract

The invention discloses an adsorbent for heavy metal waste liquid treatment. The adsorbent mainly comprises shaddock peel, persimmon peel and solid alkali. A preparation method of the adsorbent comprises mixing shaddock peel and persimmon peel, cleaning the shaddock peel and persimmon peel through water to obtain a mixture, mixing the mixture, solid alkali and water for a reaction, and filtering the reaction product to obtain the adsorbent. A use method of the adsorbent comprises adjusting pH of a heavy metal waste liquid to 6-7, adding the adsorbent into the heavy metal waste liquid, carrying out uniform stirring, and carrying out standing for 10 to 15 minutes. The shaddock peel contains abundant proteins and organic acids, and the persimmon skin contains a large amount of tannic acid. The components can complex a large amount of heavy metal ions in the heavy metal waste liquid. The waste liquid treatment method utilizes the natural shaddock peel and persimmon peel, has simple processes and significant effects, greatly reduces a treatment cost and a treatment cycle, does not cause secondary pollution and is an energy-saving and environmental-protection wastewater treatment method.

Description

technical field [0001] The invention relates to a preparation method of an adsorbent used for heavy metal waste liquid treatment, and belongs to the technical field of sewage treatment. Background technique [0002] With the rapid development of industry, the wastewater produced in the process of smelting and using heavy metals contains a large amount of heavy metal components, which has caused great pollution and harm to the environment. In order to maintain the sustainable development of society, heavy metal waste liquid should be effectively treated. [0003] At present, the treatment methods of heavy metal waste liquid can be roughly divided into three categories: (1) chemical method; (2) physical treatment method; (3) biological treatment method. Chemical methods include chemical precipitation and electrolysis, which are mainly suitable for the treatment of wastewater containing high concentrations of heavy metal ions. Chemical methods are currently the main methods fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/24B01J20/0277B01J20/041C02F1/28C02F1/281C02F1/286
Inventor 不公告发明人
Owner CHANGSHA QIUDIANBING INFORMATION TECH CO LTD
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