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Method for rapidly removing hexavalent chromium pollutants by utilizing electron carrier

An electron carrier, hexavalent chromium technology, applied in the environmental field, can solve the problems of slow removal rate and poor removal effect, and achieve the effect of fast and effective removal

Active Publication Date: 2020-06-23
TIANJIN INST OF IND BIOTECH CHINESE ACADEMY OF SCI
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  • Abstract
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  • Claims
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Problems solved by technology

[0011] The purpose of the present invention is to provide a method for quickly removing hexavalent chromium pollutants by using an electron carrier, which can effectively and quickly remove hexavalent chromium pollutants, thereby solving the problem of the current slow removal rate and poor removal effect of hexavalent chromium pollutants problem, which is conducive to the rapid removal of hexavalent chromium pollutants

Method used

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  • Method for rapidly removing hexavalent chromium pollutants by utilizing electron carrier
  • Method for rapidly removing hexavalent chromium pollutants by utilizing electron carrier
  • Method for rapidly removing hexavalent chromium pollutants by utilizing electron carrier

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Embodiment Construction

[0024] The following specific examples are used to illustrate the specific implementation methods of the present invention, but these examples do not constitute a limitation on the manner, scope, and effects of the present invention.

[0025] A method for rapidly removing hexavalent chromium pollutants using electronic carriers, and proceed as follows:

[0026] Step 1. Cultivation of Shewanella

[0027] Streak the Shewanella onesidensis MR-1 stored at -80℃ on LB plates, cultivate overnight at 30℃, transfer a single colony into LB liquid medium, culture at 30℃ for 16-18h, transfer 1% inoculum to a new one In the LB medium, shake culture at 30°C for 12-20 hours at a speed of 200 rpm, and the growth of the strain reaches a stable period.

[0028] Among them, the LB liquid medium was prepared by adding 10 g of tryptone, 5 g of yeast extract, and 10 g of NaCl in 950 mL of deionized water, and shaking the container until the solute was dissolved. Make the volume to 1L with deionized water,...

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Abstract

The invention discloses a method for rapidly removing hexavalent chromium pollutants by using an electron carrier, and belongs to the technical field of environment. The physiological property that the Shewanella oneidensis MR-1 can be used for removing hexavalent chromium pollutants is used as a basis; a strain is cultured to a stable growth period; thalli are collected and transferred to a reactor to carry out re-suspending; the hexavalent chromium pollutant removal capability of the electron carriers namely riboflavin and anthraquinone-2-sodium sulfonate is measured; under the condition that the concentration of riboflavin is 10-50 [mu]M, the Cr<6+> removal rate of riboflavin is increased to 1.40-2.26 times, the removal rate is increased to 42.0-67.7% from 30.0%, and the Cr<6+> removalrate is higher under the condition that the pH value is equal to 8; anthraquinone-2-sodium sulfonate can also improve the removal speed and removal rate of Cr<6+>, and under a concentration of 100 [mu]M, the maximum removal rate reaches 98.1% and is close to 100%. Hexavalent chromium pollutants can be quickly removed by utilizing the electron carrier, so that the problem of low removal efficiencyof hexavalent chromium pollutants at present is solved, and the method has potential environmental remediation and application values.

Description

Technical field [0001] The invention relates to a method for rapidly removing hexavalent chromium pollutants by using an electronic carrier, and belongs to the field of environmental technology. Background technique [0002] The reserves of elemental chromium in the earth's crust are very abundant, mainly in the form of multiple oxidation states. In nature, elemental chromium mainly exists in the form of trivalent chromium and hexavalent chromium. Chromium is widely used in a series of industrial production processes, including metal processing, electroplating, leather making, etc. [1] . Hexavalent chromium is a highly toxic, mutagenic and carcinogenic substance. Due to its high solubility and stability, chromium slag waste and chromium-containing wastewater generated in industrial production are discharged into the environment without treatment or improper treatment. Among them, it is easy to cause water pollution and soil pollution, thereby endangering the growth of aquatic or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/00C02F101/22
CPCC02F3/34C02F3/005C02F2101/22
Inventor 刘君徐宁王岩
Owner TIANJIN INST OF IND BIOTECH CHINESE ACADEMY OF SCI
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