Composite adsorbing material for removing vanadium ions in natural water and preparation method thereof

Abstract

The invention belongs to the field of water treatment in environmental-protection industry, and particularly relates to a preparation method of novel composite adsorbing material prepared by loading crosslinked chitosan on modified apocynum venetum short fibers for removing lithium ions in natural water. The preparation method comprises the steps as follows: preparing crosslinked chitosan through chitosan, epichlorohydrin and sodium hydroxide; then carrying out basification modification to apocynum venetum fibers so as to obtain the modified apocynum venetum short fibers; uniformly mixing to compositing the crosslinked chitosan and the modified apocynum venetum short fibers; and finally precipitating, washing, filtering, centrifuging and drying in the air to obtain the composite adsorbing material. The composite adsorbing material provided by the invention has the characteristics that the selective adsorption property on the vanadium ions is efficient, the regenerating and recycling effects are good, the operation is simple, no secondary pollution is caused, the price is low, the efficiency is high, and the like. The preparation method provided by the invention is simple in technology, low in cost, high in efficiency and beneficial for environmental protection, and has high economic and social benefits in the field of water treatment.

Description

technical field [0001] The invention relates to a composite adsorption material for removing vanadium ions in natural water bodies and a preparation method thereof, in particular to a new type of material prepared by loading cross-linked chitosan on apocynum modified short fibers, which belongs to water purification treatment field. Background technique [0002] Vanadium is a rare metal with high melting point, which is widely used in metallurgy, chemistry, aircraft and automobile manufacturing, defense industry and other fields. Vanadium is also one of the essential trace elements for the human body, but excessive vanadium has a toxic effect on the human body, and its toxicity increases with the increase of the valence. Therefore, it is of great significance to analyze and study vanadium in environmental samples. [0003] At present, the methods used to remove vanadium ions in natural water mainly include extraction method and ion exchange method. The vanadium extraction...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a composite adsorption material for removing vanadium ions in natural water bodies and its preparation method in order to overcome the deficiencies of existing technologies in terms of material recycling and secondary pollution