Preparation method of carbon based nano-iron alloy water treatment material

Abstract

The invention belongs to the field of water treatment technologies, relating to a preparation method of a carbon based nano-iron alloy water treatment material by utilizing carbon based nano-iron alloy to activate hypochlorous acid and hypochlorite, and generate chlorine radical and hydroxyl radical to remove p-chlorotoluene. The preparation method comprises the following steps: 1) an activation process of granular active carbon; the granular active carbon is activated by adopting a boiling water activation method; 2) nano-iron alloy is loaded in the activated granular active carbon; inorganic iron salt and activated active carbon are mixed according to the iron-carbon mass ratio of (1:1) to (1:5), nickel chloride or palladium acetate is mixed with the inorganic iron salt, and the molar ratio of the nickel chloride or the palladium acetate to iron in ferric salt is (1:5) to (1:10), then iron alloy is produced by being reduced by adopting a potassium borohydride liquid phase method and is loaded on the granular active carbon. The material obtained by the invention has less secondary pollution in a water treatment process, good treatment effect, and is liable to be realized.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a preparation method of a carbon-based nano-iron alloy water treatment material capable of activating hypochlorous acid and hypochlorite radicals by utilizing carbon-based nano-iron alloys, generating chlorine radicals and hydroxyl radicals and removing p-chlorotoluene. Background technique [0002] P-chlorotoluene, benzene, toluene, and styrene are common trace pollutants in tap water sources, which are harmful to human health. [0003] Many technologies now use nano-zero-valent iron and nano-zero-valent iron doped with precious metals to remove inorganic or organic substances in water, which has been reported in many literatures. Mohammed et al. studied the activation of nano-zero-valent iron to degrade other organic pollutants by potassium persulfate. The results showed that the effect of sodium persulfate activated by nano-zero-valent iron on removing organic pollutants...

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Problems solved by technology

[0004] The defects in the existing method are: the activity of the nano-zero-valent iron nano-iron alloy is not high, and it is easy to cause secondary pollution, and it is not easy to recycle; and the treatment effect of the existing method still needs to be improved.

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