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Method for removing hexavalent chromium in waste water by utilizing gel beads prepared from tartaric acid modified oyster mushrooms

A technology of tartaric acid and hexavalent chromium, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as difficult separation, low adsorption capacity, and restrictions on wide application, and achieve low cost and high adsorption efficiency , The effect of low process cost

Active Publication Date: 2015-08-12
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Pleurotus ostreatus contains a large amount of cellulose and chitin, which has adsorption properties for heavy metal ions. It has been developed as a biosorbent material for treating heavy metals in wastewater. However, the powdered pleurotus sorbent made of it has the disadvantages of low adsorption capacity and difficult separation. , which limits the wide application of these adsorbents

Method used

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  • Method for removing hexavalent chromium in waste water by utilizing gel beads prepared from tartaric acid modified oyster mushrooms
  • Method for removing hexavalent chromium in waste water by utilizing gel beads prepared from tartaric acid modified oyster mushrooms
  • Method for removing hexavalent chromium in waste water by utilizing gel beads prepared from tartaric acid modified oyster mushrooms

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Embodiment 1

[0031] A method for removing hexavalent chromium in waste water by using tartaric acid modified oyster mushroom gel pellets prepared by a kind of the present invention comprises the following steps:

[0032] 1. Preparation of Adsorbent

[0033] (1) Place the cleaned Pleurotus ostreatus biomass in an oven for 24 hours at 60° C., and pass through a 100-mesh sieve after pulverizing with a pulverizer;

[0034] (2) Dissolve 25g of tartaric acid in 500mL of deionized water to make a certain concentration of tartaric acid solution, take 10g of the material obtained in step (1) and add it to the tartaric acid solution, stir in a water bath at 60°C for 24 hours, and mix the reacted Pleurotus ostreatus powder Wash with deionized water to neutrality, filter and dry, grind, pass through a 100-mesh sieve, and obtain tartaric acid modified oyster mushroom powder;

[0035] (3) 1g chitosan is dissolved in the acetic acid solution of 1% by volume percentage, is mixed with the chitosan solutio...

Embodiment 2

[0046] A kind of method that utilizes tartaric acid modified oyster mushroom preparation of the present invention to remove Cr(VI) in degraded waste water comprises the following steps:

[0047] 1. Preparation of Adsorbent

[0048] This step is the same as Step 1 of Example 1.

[0049] 2. Treatment of Cr(VI) wastewater

[0050] Prepare 10 parts of 100mg / L Cr(VI) solution with 1mol / L NaOH or HNO 3 Adjust the pH to 3. Add the above-mentioned tartaric acid modified oyster mushroom gel pellets, and the addition amount in every liter of waste water is 10 g based on the wet weight of the tartaric acid modified oyster mushroom gel pellets. Place them in a constant temperature shaker at 40°C. The oscillator speed is 130 rpm, and the oscillation time is 5, 10, 30, 60, 120, 180, 360, 720, 1080, 1440 minutes respectively. After the reaction, the pellets were separated from the solution to complete the removal of Cr(VI). The concentration of Cr(VI) remaining in the solution was meas...

Embodiment 3

[0055] A kind of method that utilizes tartaric acid modified oyster mushroom preparation of the present invention to remove Cr(VI) in degraded waste water comprises the following steps:

[0056] 1. Preparation of Adsorbent

[0057] This step is the same as Step 1 of Example 1.

[0058] 2. Treatment of Cr(VI) wastewater

[0059] Prepare Cr(VI) solutions with concentrations of 50, 100, 200, 400, and 500mg / L respectively, and use 1mol / L of NaOH or HNO 3 Adjust the pH to 3. Add the tartaric acid-modified oyster mushroom gel pellets, the amount added per liter of waste water is 10 g based on the wet weight of the tartaric acid-modified oyster mushroom gel pellets, and place them in a constant temperature oscillator at 40°C. The rotating speed of the oscillator was 130 rpm, and after shaking for 24 hours, the pellets were separated from the solution to complete the treatment of Cr(VI) wastewater. The concentration of Cr(VI) remaining in the solution was measured at a wavelength ...

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Abstract

The invention discloses a method for removing hexavalent chromium in waste water by utilizing gel beads prepared from tartaric acid modified oyster mushrooms. The method comprises the following steps: adjusting the pH value of a certain amount of Cr(VI)-containing waste water into 1.0-10.0, adding a certain amount of gel beads prepared from the tartaric acid modified oyster mushrooms into waste water, wherein the gel beads prepared from the tartaric acid modified oyster mushrooms with the wet weight of 5g-15g is added in each liter of waste water, reacting in a constant-temperature oscillator at the rotation speed of 100-200 turns / min at the temperature of 10 DEG C-50 DEG C for 1-48 hours, separating the gel beads prepared from the tartaric acid modified oyster mushrooms from the solution after reaction so as to remove Cr(VI) in wastewater. The method has the advantages of low cost, convenience in operation, high treatment efficiency, easiness in separation and recycling and the like.

Description

technical field [0001] The invention relates to the application of biomass composite materials in the field of wastewater treatment, and mainly relates to a method for removing hexavalent chromium in wastewater by using gel pellets prepared by modifying oyster mushrooms with tartaric acid. Background technique [0002] Chromium is an important environmental pollutant, which mainly comes from the "three wastes" discharged by industries such as metallurgy, machinery, electroplating, tanning, medicine, dyes and chemicals. Among the chromium compounds, hexavalent chromium is the most toxic and has obvious teratogenic, mutagenic and carcinogenic effects, and is listed as one of the most harmful chemical substances to the human body. It has high mobility and strong oxidizing properties, and it has quite high toxicity even at low concentrations, and its toxicity is 500 times that of trivalent chromium. Traditional methods for recovering and treating Cr(VI)-containing wastewater ma...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/62C02F101/22
Inventor 王姝凡徐卫华刘云国李婷婷王慧曾光明郭方颖张明明郑炜晔
Owner HUNAN UNIV
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