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Preparation method of zero-valent iron sulfide and application thereof

A zero-valent iron and elemental sulfur technology, applied in the field of environmental chemistry, can solve the problems of zero-valent iron and sulfur waste, low utilization rate of sulfur, harsh vulcanization conditions, etc., achieve less energy consumption, facilitate large-scale promotion, The effect of short preparation time

Active Publication Date: 2019-04-12
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method needs to control the reaction solution to maintain a low pH value, consumes a large amount of acid, and the vulcanization conditions are relatively harsh
Na 2 S is not easy to store, and the utilization rate of sulfur in the vulcanization process is not high, and it is easy to cause waste of zero-valent iron and sulfur in the preparation

Method used

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  • Preparation method of zero-valent iron sulfide and application thereof
  • Preparation method of zero-valent iron sulfide and application thereof
  • Preparation method of zero-valent iron sulfide and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Take 0.014g of elemental sulfur powder and 0.246g of zero-valent iron in a 52mL serum bottle. Under anaerobic conditions, add 26 mL of 200 mM morpholineethanesulfonic acid (MES) solution with an initial pH of 6.00 to the serum bottle. After the serum bottle is sealed, it is placed in a rotary mixer for 12 hours of rotating and mixing reaction to obtain zero-valent iron sulfide. After filtering and freeze-drying, dry zero-valent iron sulfide is obtained.

[0058] Figure 1~3 These are the SEM-EDS diagram, XRD diagram and XPS diagram of the zero-valent iron sulfide prepared in this embodiment in sequence. figure 1 can show the proportion of Fe, O, and S elements in the material particles, and we can clearly observe the existence of S elements in the material, indicating that the reaction of elemental sulfur and zero-valent iron can form sulfides on the surface of iron particles. At the same time, it can be observed that the distribution of S element on the particle su...

Embodiment 2

[0060] Take 0.014g of elemental sulfur powder and 0.246g of zero-valent iron in a 52mL serum bottle. In an anaerobic environment, add 26 mL of 10 mM CaCl with an initial pH of 4.00 to the serum bottle 2 aqueous solution. After the serum bottle is sealed, place it in a rotary mixer and mix and react for 12 hours to obtain zero-valent iron sulfide. After filtering and freeze-drying, dry zero-valent iron sulfide is obtained.

Embodiment 3

[0062] Take 0.014g of elemental sulfur powder and 0.246g of zero-valent iron in a 52mL serum bottle. In an anaerobic environment, add 26 mL of MgCl with an initial pH of 4.00 and 10 mM to the serum bottle 2 aqueous solution. After the serum bottle is sealed, place it in a rotary mixer and mix and react for 12 hours to obtain zero-valent iron sulfide. After filtering and freeze-drying, dry zero-valent iron sulfide is obtained.

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Abstract

The invention discloses a preparation method of zero-valent iron sulfide and application thereof. The preparation method comprises the steps that under the ambient temperature condition, zero-valent iron and simple-substance powdered sulfur are mixed to be subjected to a reaction in a water solution to obtain zero-valent iron sulfide. According to the method, zero-valent iron and simple-substancepowdered sulfur are mixed to be subjected to the reaction in the water solution, little energy is consumed, operation is easy and convenient, the preparation time is relatively short, the preparationcost is low, and the obtained zero-valent iron sulfide has the high removal efficiency for heavy metal and organic contaminants.

Description

technical field [0001] The invention relates to the technical field of environmental chemistry, in particular to a preparation method and application of zero-valent iron sulfide. Background technique [0002] Zero-valent iron is a very common substance in our life. Due to its active chemical properties, abundant sources, low price, high electronegativity, and strong reducibility, it is widely used in the degradation and removal of organic compounds in the environment. pollutants and inorganic pollutants. Since the beginning of the 21st century, the discovery of nanometer zero-valent iron has brought a broader space for the development of zero-valent iron. [0003] Although nano-zero-valent iron has the characteristics of excellent reactivity, low cost, and low toxicity, it also faces limitations in in-situ repair and storage due to its own properties. Among the modification methods to enhance the practical application potential of nanoscale zero-valent iron in aqueous envi...

Claims

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Application Information

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IPC IPC(8): C02F1/00C02F101/10C02F101/20C02F101/22C02F101/30C02F101/32C02F101/34C02F101/36C02F101/38
CPCC02F1/00C02F2101/103C02F2101/20C02F2101/22C02F2101/306C02F2101/308C02F2101/322C02F2101/345C02F2101/36C02F2101/34C02F2101/38
Inventor 何锋蔡世超谷亚威
Owner ZHEJIANG UNIV OF TECH
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