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Method for preparing porous nickel particles through nickel ions in hydrothermal hydrogen gas reduction waste water

A technology of porous nickel and nickel ions, which is applied in the field of preparing porous nickel particles from nickel ions in hydrothermal hydrogen reduction wastewater, can solve the problems of complex reaction process, low recovery conversion efficiency, and difficult control, and achieve simple reaction process and high efficiency of reaction process. Economical and easy to control, good appearance effect

Inactive Publication Date: 2014-08-06
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The recovery conversion efficiency of existing recovery methods is not high, and the reaction process is complex and difficult to control. Therefore, how to recover nickel ions in wastewater to obtain valuable heavy metal elements through a simple, economical and efficient method is still an urgent problem to be solved.

Method used

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  • Method for preparing porous nickel particles through nickel ions in hydrothermal hydrogen gas reduction waste water
  • Method for preparing porous nickel particles through nickel ions in hydrothermal hydrogen gas reduction waste water
  • Method for preparing porous nickel particles through nickel ions in hydrothermal hydrogen gas reduction waste water

Examples

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Embodiment 1

[0023] Wastewater (Ni 2+ The substance mass concentration is 2.5mol / L), ammonium sulfate, nickel species (about 700 nanometers in size) and ammonia water (mass concentration is 28~30%) are mixed evenly at a mass ratio of 100:66:14:35, and 160 Put the reaction kettle into an electric furnace capable of temperature-programmed heating, seal it well, use nitrogen to remove the air in the reaction kettle, wait for the temperature of the furnace to rise from room temperature to 180°C, and inject hydrogen with a pressure of 3.5MPa , naturally cooled to room temperature after reacting for 60 minutes. Collect the gray deposits in the kettle, wash with distilled water and absolute ethanol, filter, and then dry in a vacuum oven at 50° C. for 4 hours to obtain porous nickel particles.

[0024] Adopt Japanese Rigaku D / max- gamma A type X-ray powder diffractometer (XRD) was used for phase analysis of the obtained nickel particles. figure 1 The X-ray powder diffraction spectrogram of the...

Embodiment 2

[0031] Removal of waste water (Ni 2+ The substance mass concentration is 2.5mol / L), ammonium sulfate, nickel species and ammoniacal liquor are 100:66:14:15 by mass ratio, and preparation steps are identical with embodiment 1. The average particle size of porous nickel particles obtained in this example is about 10 microns, the diameter of nickel nanoparticles is about 500 nm, and the yield is about 30%.

Embodiment 3

[0033] Removal of waste water (Ni 2+ The substance mass concentration is 2.5 mol / L), ammonium sulfate, nickel species and ammoniacal liquor are 100:66:14:22.5 by mass ratio, and preparation procedure is identical with embodiment 1. The average particle size of porous nickel particles obtained in this example is about 45 microns, the diameter of nickel nanoparticles is about 540 nm, and the yield is about 60%.

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Abstract

The invention discloses a method for preparing porous nickel particles through nickel ions in hydrothermal hydrogen gas reduction waste water. The method comprises the following steps that the waste water containing the nickel ions, ammonium sulfate, a nickel specie and ammonia water are added into a reaction kettle at room temperature, the reaction kettle is sealed and heated to the temperature ranging frame 80 DEG C to 180 DEG C, hydrogen gas with the pressure ranging frame 2.5 MPa to 5.5 MPa is led into the reaction kettle, the mixture is stirred, the reaction is carried out for 20 min to 120 min, the product is washed with alcohol and water, filtered and dried, and the porous nickel particles are obtained. According to the method for preparing the porous nickel particles through the nickel ions in the hydrothermal hydrogen gas reduction waste water, the hydrothermal hydrogen gas reduction technology is adopted, the nickel ions in the waste water are converted into the porous nickel particles, the reaction temperature is low, the conversion rate is high, and the reaction process is simple, economical and easy to control; the obtained nickel particles have the advantages of being porous, good in appearance and the like, the diameter of the particles ranges from 10 micrometers to 80 micrometers, and the size of the nickel nano-particles ranges from 500 nanometers to 900 nanometers.

Description

technical field [0001] The invention relates to a method for recovering and treating heavy metal ions in waste water, in particular to a method for preparing porous nickel particles by reducing nickel ions in waste water with hydrothermal hydrogen. Background technique [0002] With the rapid development of economy and society, many heavy metal ion pollutants produced by industrialized production are discharged into rivers and soil, resulting in more and more serious environmental pollution. Among them, nickel ion-containing wastewater is a kind of harmful industrial wastewater, which mainly comes from mining industry, nonferrous metallurgy industry, metal processing, instrumentation, electroplating, printing and dyeing, tanning and various enterprises using nickel compounds. Studies have shown that heavy metal ions are difficult to degrade naturally, can remain latent in soil and water for a long time, and enter the human body along the food chain, thereby endangering human...

Claims

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Application Information

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IPC IPC(8): B22F9/26
Inventor 张俊豪
Owner JIANGSU UNIV OF SCI & TECH