Carbon-nanotube-loaded multi-stage nanometer ferroferric oxide adsorbent and preparation method and application thereof

Abstract

The invention discloses a carbon-nanotube-loaded multi-stage nanometer ferroferric oxide adsorbent and a preparation method and application of the carbon-nanotube-loaded multi-stage nanometer ferroferric oxide adsorbent. The adsorbent comprises a carbon nanotube and multi-stage nanometer ferroferric oxide loaded on the carbon nanotube, wherein the ferroferric oxide has the grain size of 30 to 80 nanometers and mass fraction of 25 to 35%. The preparation method of the adsorbent comprises the following steps in sequence: mixing the oxidized carbon nanotube with an organic reducing agent and an organic iron compound; transferring the mixture into a reacting kettle; thermally synthesizing through an in-situ solvent in an oil bath under an inert atmosphere at reaction temperature of 180 to 270 DEG C and pressure of 0.1 to 2.0 MPa; cooling the reacting product; washing; and drying in vacuum to obtain carbon-nanotube-loaded multi-stage nanometer ferroferric oxide adsorbent. The carbon-nanotube-loaded multi-stage nanometer ferroferric oxide adsorbent disclosed by the invention is high adsorbing performance and easy to separate and recovery; and the preparation method is simple and low in cost, and has a wide application prospect in the field of adsorbing heavy metal ions and organic pollutants from the wastewater.

Description

technical field [0001] The present invention relates to a preparation method of a loaded multi-stage nano-adsorbent and its application in complex separation and smelting of heavy metal wastewater, in particular to a carbon nanotube-loaded multi-stage nano-ferric oxide adsorbent and its preparation method and application. It belongs to the field of water treatment and water pollution prevention and control. Background technique [0002] Mineral dressing and smelting wastewater contain heavy metal compounds, because various organic and inorganic flotation reagents are used in ore flotation, and the flotation reagents are easy to form organic substances such as phenols after conversion, so the discharged wastewater often contains heavy metals and phenolic organic substances at the same time wait. Lee et al. reported that the coexistence of heavy metal mercury and organic 4-nonylphenol synergistically increases cytotoxicity, and the interaction of complex pollutants not only a...

AI Technical Summary

Problems solved by technology

However, the preparation of composite nanomaterials is often cumbersome. Therefore, the research and development of environmentally friendly, low-cost, strong adsorption capacity, and easy-to-separate multi-level nano-ferric oxide-loaded adsorbents have more industrial application prospects.

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