Unlock instant, AI-driven research and patent intelligence for your innovation.

Kaolinite-loaded biosynthetic nano ferro-sulfide material as well as preparation method and application thereof

A biosynthesis and kaolinite technology, applied in biochemical equipment and methods, microorganism-based methods, microorganisms, etc., can solve the problems of sulfate-reducing bacteria, weak adsorption, and nano-sulfur oxidation, etc. Good dispersion effect, easy to obtain, easy to recycle

Inactive Publication Date: 2020-04-28
SOUTH CHINA UNIV OF TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these materials themselves are very weak to Cr(III) adsorption, and most of them synthesize nano-iron sulfur by chemical methods first, and then add solid materials to stir with it for a period of time, so that nano-iron sulfur is loaded on the surface of the solid material (Park, M ., J.Park, J.Kang, Y.S.Han and H.Y.Jeong(2018). "Removal of hexavalent chromium using mackinawite(FeS)-coated sand."J HazardMater 360:17-23.), this dispersion method is easy to cause nano oxidation of sulfur and iron, and little attention has been paid to the sulfate-reducing bacteria widely present in the natural environment, which can directly utilize sulfate and Fe 2+ Synthetic Nanopyrite

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Kaolinite-loaded biosynthetic nano ferro-sulfide material as well as preparation method and application thereof
  • Kaolinite-loaded biosynthetic nano ferro-sulfide material as well as preparation method and application thereof
  • Kaolinite-loaded biosynthetic nano ferro-sulfide material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A preparation method of kaolinite-loaded biosynthetic nano-iron sulfur material, comprising the steps of:

[0054] (1) 0.3500g sodium lactate, 0.6500g KH 2 PO 4 , 1.0000g Na 2 SO 4 , 1.0000g NH 4 Cl, 2.0000gMgSO 4 ·7H 2 0 and 1.0000g of yeast extract were dissolved in 725ml of water, mixed uniformly, then adding 200ml of HEPES buffer solution with a concentration of 0.1M to obtain a mixed solution, and adjusting the pH of the mixed solution with 0.1M NaOH solution to be 6.5;

[0055] (2) Add 74.0ml of the mixed solution in step (1) into the anaerobic bottle, then add 240mg of kaolinite to obtain a suspension, blow off with nitrogen for 30min to remove the dissolved oxygen in the suspension, and then seal the anaerobic bottle. Oxygen bottle, the anaerobic bottle is sterilized (sterilized at 121° C. for 30 min), to obtain the sterilized mixed solution in the bottle;

[0056] (3) 1.0000g CaCl 2 Dissolve in 25.0ml sterilized water, mix well to get CaCl 2 solution; ...

Embodiment 2

[0062] Get 3 parts of Cr (VI) solutions that initial concentration is 0.80mM respectively in 3 reaction vessels, the background ion concentration of described Cr (VI) solutions is the NaCl of 0.10M, the pH value of described Cr (VI) solutions 6.5 (using 50.0mM HEPES as buffer), blow off with nitrogen respectively for 30min, keep the anaerobic environment; then add the pure nano iron sulfur material (FeS) that 70mg comparative example 1 makes respectively in these 3 reaction vessels, The kaolinite-loaded biosynthetic nano-iron sulfur material (kaolinite / FeS) that 600mg embodiment 1 makes, 600mg kaolinite, the FeS content in the kaolinite / FeS of 600mg embodiment 1 is 30mg, and 70mg FeS is the content of 30mg FeS 2.3 times, add the rotor, plug the butyl rubber stopper and aluminum cover to ensure its anaerobic environment, then put these 3 reaction vessels on a magnetic stirrer with a rotating speed of 200rpm to carry out the Cr(VI) removal reaction, the reaction The temperature ...

Embodiment 3

[0065] Example 3 is basically the same as Example 1, the only difference being that the amount of kaolinite described in step (2) is 24 mg, that is, the concentration of kaolinite in the culture solution described in step (3) is 0.3 mg / mL , to obtain kaolinite-loaded biosynthetic nano-iron sulfur material (kaolinite / FeS).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
concentrationaaaaaaaaaa
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a kaolinite-loaded biosynthetic nano ferro-sulfide material as well as a preparation method and application thereof. The material is mainly applied to treatment of chromium-containing wastewater. The preparation method comprises the following steps: adding kaolinite into a culture medium for culturing sulfate reducing bacteria, culturing, and centrifugally drying to obtainthe kaolinite-loaded biosynthetic nano ferro-sulfide material. The kaolinite-loaded biosynthetic nano ferro-sulfide material and the method have the following beneficial effects: (1) the adopted materials are common materials in soil and water sediments, are easy to obtain, have no pollution to the primary environment and have stable properties; (2) the preparation method is simple and convenient,the cost is low, the nano ferro-sulfide can be automatically dispersed on the surface of kaolinite during synthesis, and post-processing treatment is not needed; and (3) through kaolinite loading, the nano ferro-sulfide is effectively dispersed on the surface of kaolinite, so that the particle size of the nano ferro-sulfide is reduced, the defect that the nano ferro-sulfide is easy to agglomerateis improved, and the removal rate of the nano ferro-sulfide material on Cr(VI) in a water body and the removal amount per unit mass (mg Cr(VI) / g (FeS)) are remarkably improved.

Description

technical field [0001] The invention relates to the application field of water treatment technology, in particular to a kaolinite-loaded biosynthesized nano-iron sulfur material and its preparation method and application, which are mainly used for treating Cr(VI)-containing wastewater. Background technique [0002] With the development of electroplating, dyes, leather and paper industries, a large amount of Cr-containing substances are discharged into the environment. Cr in the environment usually exists in the form of Cr(VI) and Cr(III), among which Cr(VI) is highly toxic, and a small dose can cause damage to the kidneys and liver, and is a carcinogen, while Cr(III) is an essential trace amount for the human body. The element, present in grains, is an essential element for sugar metabolism. Therefore, the idea of ​​treating Cr(VI) in the environment is to reduce it to Cr(III). Commonly used reducing agents are Fe(II), sulfides and organic matter. Its reduction mechanism ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C12P3/00C12R1/01C02F101/22
CPCC02F3/34C02F2101/22C12P3/00
Inventor 郭楚玲李琦张宇扬廖衍光黄佳婷卢桂宁党志
Owner SOUTH CHINA UNIV OF TECH