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A method for removing malachite green in wastewater by using sunflower seed shell biochar adsorbent

A technology of sunflower seed husks and biomass charcoal is applied in the fields of adsorption water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc. Achieve the effect of low cost, large adsorption capacity and no secondary pollution

Active Publication Date: 2015-08-26
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the methods for removing malachite green at home and abroad mainly include ion exchange method, membrane separation method, precipitation method and redox method. May also produce secondary pollution, limiting the widespread application of these methods

Method used

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  • A method for removing malachite green in wastewater by using sunflower seed shell biochar adsorbent
  • A method for removing malachite green in wastewater by using sunflower seed shell biochar adsorbent
  • A method for removing malachite green in wastewater by using sunflower seed shell biochar adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take a certain quality of sunflower seed shells, rinse them with tap water for several times, dry, crush, and sieve to 600-1000 μm, mix the sunflower seed shell particles and zinc chloride solution according to the mass of sunflower seed shell particles (g): the mass of zinc chloride solution ( g) Mix and impregnate in a conical flask at a ratio of 1:7.5, in which the concentration of zinc chloride solution is 30%. After 18 minutes of microwave treatment at 450W, the obtained sunflower seed shell biochar was pickled with 15% hydrochloric acid solution, then washed with distilled water until the pH was neutral, and dried to obtain the sunflower seed shell biochar adsorbent.

[0019] Take 0.1 g of the adsorbent prepared in this example and 2.5 g of NaCl and add them into 50 mL of malachite green solution with pH values ​​of 2, 4, 6, 7, and 8 and a concentration of 100 mg / L, and place in a constant temperature water bath shaker at 20°C After shaking for 2 hours, filter and...

Embodiment 2

[0022] Take a certain quality of sunflower seed shells, rinse them with tap water for several times, dry, crush, and sieve to 600-1000 μm, mix the sunflower seed shell particles and zinc chloride solution according to the mass of sunflower seed shell particles (g): the mass of zinc chloride solution ( g) Mix and impregnate in a conical flask at a ratio of 1:8, in which the concentration of zinc chloride solution is 35%. After 400W microwave treatment for 21 minutes, the obtained sunflower seed shell biochar was pickled with 15% hydrochloric acid solution, then washed with distilled water until the pH was neutral, and dried to obtain the sunflower seed shell biochar adsorbent.

[0023] Add 0.20 g of the adsorbent prepared in this example and 5 g of sodium chloride into 50 mL of solutions containing 100, 300, 500, 700, and 900 mg / L malachite green respectively, shake in a constant temperature water bath shaker at 20 °C for 24 h , separated by filtration, and the filtrate was adj...

Embodiment 3

[0026] Take a certain quality of sunflower seed shells, rinse them with tap water for several times, dry, crush, and sieve to 600-1000 μm, mix the sunflower seed shell particles and zinc chloride solution according to the mass of sunflower seed shell particles (g): the mass of zinc chloride solution ( g) Mix and impregnate in a conical flask at a ratio of 1:8.5, in which the concentration of zinc chloride solution is 40%. After 24 minutes of microwave treatment at 370W, the obtained sunflower seed shell biochar was pickled with 15% hydrochloric acid solution, then washed with distilled water until the pH was neutral, and dried to obtain the sunflower seed shell biochar adsorbent.

[0027] Get 0.25g of the adsorbent prepared in this embodiment and add sodium chloride to make the percentage mass concentration respectively 0%, 2%, 5%, 10%, 15%, 30%, in 50mL100mg / L malachite green solution, in 20 After shaking in a constant temperature water-bath shaker at ℃ for 2 hours, filter an...

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Abstract

The invention discloses a method used for removing malachite green from waste water with sunflower seed shell biomass carbon adsorbent, and belongs to the technical field of waste water processing. The method comprises following steps: the sunflower seed shell biomass carbon adsorbent prepared via microwave heating, and sodium chloride are added into waste water containing 100 to 900mg / L malachite green and with a pH value of 2 to 8, adsorption is performed for 2 to 24 hours at a temperature of 20 to 60 DEG C, an obtained mixture is filtered for separation, and a filtrate is adjusted to be neutral, and then is discharged. The method used for removing malachite green from waste water is simple, cost is low, and no secondary pollution is caused.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and relates to a method for removing malachite green in wastewater by using an adsorbent, in particular to a method for removing malachite green in wastewater by using a sunflower seed shell biomass carbon adsorbent. Background technique [0002] Malachite green is a synthetic organic compound, which is not only a dye, but also a fungicide, and its chemical functional group trityl has carcinogenic effect. Malachite green is often used for dyeing wool, silk, leather, etc. In the aquaculture industry, malachite green is used to treat parasitic, fungal or bacterial infections of fish or fish eggs, but it has side effects such as high toxicity and high residue on certain seafood. Malachite green is deposited in fish and other foods, and reaches and accumulates in the human body or animals through the food chain, endangering human health and easily causing poisoning of human and animal l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/58B01J20/20B01J20/30
Inventor 高景峰司春英杨辰
Owner BEIJING UNIV OF TECH
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