A kind of preparation method of zero-valent iron ball

Abstract

The invention relates to a preparation method of a zero-valent iron ball. The preparation method comprises steps of preparing nanoscale zero-valent iron powder with stabilized guar gum, and utilizing nanoscale zero-valent iron powder with stabilized guar gum to prepare the zero-valent iron ball. The invention further relates to the preparation method of the zero-valent iron ball. The preparation method comprises steps of preparing pumice nanoscale zero-valent iron powder with stabilized guar gum and utilizing pumice nanoscale zero-valent iron powder with stabilized guar gum to prepare the zero-valent iron ball.The preparation method of the zero-valent iron ball is easy and feasible at low cost. High performance stability of the zero-valent iron ball is obtained. The preparation method of the zero-valent iron ball has following beneficial effects: the zero-valent iron ball prepared by the preparation method helps to overcome limitations such as recovery difficulty and proneness of losing the present nano zero-valent iron powder in the practical engineering application and can functions as a filler for sewage, rainwater, reclaimed water and other percolation treatment facilities in order to remove a plurality of pollutants including degradation-resistant micro-pollutants in water.

Description

technical field [0001] The invention belongs to the technical field of processing heavy metals in water pollution, and in particular relates to a method for preparing zero-valent iron balls. Background technique [0002] The rapid process of urbanization has led to increasingly serious urban water pollution problems. Different from nitrogen, phosphorus and other substances, heavy metals and petroleum pollutants (such as polycyclic aromatic hydrocarbons, PAHs) are difficult to degrade, and can cause cumulative damage to the environment and human body, which is very harmful. When the pollutant content exceeds the self-purification ability of the water body, it will cause the accumulation of pollutants and lead to the deterioration of water quality. How to efficiently remove refractory pollutants in water bodies and ensure water environment and human health and safety has become a hot issue today. [0003] Nanoscale zero-valent iron (nZVI) is a new type of artificial material...

AI Technical Summary

Problems solved by technology

But this solid loading technology has the shortcoming of complicated experimental conditions; 2. Nano zero-valent iron powder is packed in the container (as reaction column, osmotic reaction grid), makes the solution containing pollutant flow through reaction column to remove pollutant

But there are disadvantages of inconvenient operation and construction in practical application

[0009] On the other hand, the loss under the scouring effect of water will cause the nano-zero-valent iron to fail to ensure the effective contact reaction with pollutants, resulting in a reduction in the processing efficiency of the treatment system and a waste of materials, and the outflow of nano-iron powder is also very Difficult to separate from treated water, causing secondary pollution

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