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Modified biological activated carbon adsorbent for removing Cr (VI) as well as preparation method, preparation device and application thereof

An activated carbon adsorption and biological technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of high cost, small adsorption capacity, and difficulty in meeting large-scale industrial applications

Pending Publication Date: 2021-06-08
NANJING KESHENG ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used materials for adsorption and removal of Cr(Ⅵ) include activated alumina, zeolite molecular sieve, etc., but these adsorption materials generally have high cost and low adsorption capacity, which is difficult to meet the needs of large-scale industrial applications.

Method used

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  • Modified biological activated carbon adsorbent for removing Cr (VI) as well as preparation method, preparation device and application thereof
  • Modified biological activated carbon adsorbent for removing Cr (VI) as well as preparation method, preparation device and application thereof
  • Modified biological activated carbon adsorbent for removing Cr (VI) as well as preparation method, preparation device and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of modified biological activated carbon adsorbent except Cr (VI), its raw material formula by weight is as follows: AlCl 3 1 part, MgCl 2 2 parts, clean and dry coconut shell 30 parts, NaOH saturated solution.

[0036] The present invention also provides a kind of preparation method of the modified biological activated carbon adsorbent except Cr (VI), comprising the steps:

[0037] S1, the coconut shell is cleaned, dried, crushed, and sieved with a 3-mesh standard sieve after crushing;

[0038] S2, choose the mixing and stirring equipment as an auxiliary tool, immerse the coconut shell particles after sieving in the saturated NaOH solution at normal temperature in proportion, soak for 24h, the mixing and stirring equipment is a mechanical stirring equipment, and the coconut shell particles are pressed into the solution below through the filter screen, Allow it to completely submerge in NaOH solution.

[0039] S3. After step S2 is completed, the temperature of...

Embodiment 2

[0042] A kind of modified biological activated carbon adsorbent except Cr (VI), its raw material formula by weight is as follows: AlCl 3 1 part, MgCl 2 2 parts, clean and dry coconut shell 15 parts, NaOH saturated solution.

[0043] The present invention also provides a kind of preparation method of the modified biological activated carbon adsorbent except Cr (VI), comprising the steps:

[0044] S1, the coconut shell is cleaned, dried, crushed, and sieved with a 3-mesh standard sieve after crushing;

[0045] S2, choose the mixing and stirring equipment as an auxiliary tool, immerse the coconut shell particles after sieving in the saturated NaOH solution at normal temperature in proportion, soak for 24h, the mixing and stirring equipment is a mechanical stirring equipment, and the coconut shell particles are pressed into the solution below through the filter screen, Allow it to completely submerge in NaOH solution.

[0046] S3. After step S2 is completed, the temperature of...

Embodiment 3

[0049] A kind of modified biological activated carbon adsorbent except Cr (VI), its raw material formula by weight is as follows: AlCl 3 1 part, MgCl 2 2 parts, clean and dry coconut shell 10 parts, NaOH saturated solution.

[0050] The present invention also provides a kind of preparation method of the modified biological activated carbon adsorbent except Cr (VI), comprising the steps:

[0051] S1, the coconut shell is cleaned, dried, crushed, and sieved with a 3-mesh standard sieve after crushing;

[0052] S2, choose the mixing and stirring equipment as an auxiliary tool, immerse the coconut shell particles after sieving in the saturated NaOH solution at normal temperature in proportion, soak for 24h, the mixing and stirring equipment is a mechanical stirring equipment, and the coconut shell particles are pressed into the solution below through the filter screen, Allow it to completely submerge in NaOH solution.

[0053] S3. After step S2 is completed, the temperature of...

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Abstract

The invention relates to the technical field of industrial wastewater treatment, and discloses a modified biological activated carbon adsorbent for removing Cr (VI). The adsorbent is prepared from the following raw materials in parts by weight: 1-3 parts of AlCl3, 2-6 parts of MgCl2, 25-30 parts of clean and dry coconut shell and a NaOH saturated solution. The invention further provides a preparation method and device of the modified biological activated carbon adsorbent for removing Cr (VI), and in addition, the invention further provides application of the modified biological activated carbon adsorbent for adsorbing and removing Cr (VI) in wastewater. The preparation process of the modified biological activated carbon adsorbent is simplified, and the modified biological activated carbon adsorbent has higher adsorption capacity on Cr (VI) in wastewater, is large in adsorption capacity, short in adsorption time, low in raw material cost and better in regeneration performance and has better adsorption performance and separation performance.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to a Cr(VI)-removing modified biological activated carbon adsorbent, a preparation method, a device and an application. Background technique [0002] Chromium and its compounds are widely used in industrial production as important industrial raw materials, and a large amount of chromium-containing wastewater will inevitably be produced in the production process. Cr(Ⅲ) and Cr(Ⅵ) are the main forms of chromium in water. The toxicity of Cr(Ⅲ) is low, and the daily intake of Cr(Ⅲ) by the human body is 50-200 μg through diet. The toxicity of Cr(Ⅵ) is high, and Cr(Ⅵ) with an adsorption concentration as low as 2 μg / m3 will cause sneezing and nasal mucosal discomfort. Cr(Ⅵ) is also easier to be absorbed by the human body, and it can invade the human body through the digestive tract, respiratory tract, skin and mucous membranes. The accumulation of Cr(Ⅵ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/22
CPCB01J20/20B01J20/08B01J20/041B01J20/28011C02F1/283C02F1/281C02F2101/22B01J2220/4825B01J2220/4806
Inventor 孙信柏董畔王凯夏万成朱辉
Owner NANJING KESHENG ENVIRONMENTAL PROTECTION TECH
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