Stable easy-separation nanoscale iron ball, preparation method thereof and application thereof
An easy-to-separate, nano-zero-valent iron technology, which is applied in the field of pollution sludge and water environment treatment, can solve the problems of poor NZVI stability, waste of financial and material resources, and costly manpower and material resources, so as to avoid agglomeration, overcome easy oxidation and Difficult to separate and improve utilization efficiency
Inactive Publication Date: 2012-07-25
TIANJIN NORMAL UNIVERSITY
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The invention discloses a stable easy-separation nanoscale iron ball, a preparation method thereof and application thereof. The stable easy-separation nanoscale iron ball comprises crosslinking precursor solution and nanoscale zero-valent iron dispersion solution by the volume ratio of 15:1-3:1. The crosslinking precursor solution comprises, in weight/volume percent, 0.1%-15% of chitosan-acetum solution, and the nanoscale zero-valent iron dispersion solution comprises 0.1%-15% of Tween20, 20%-55% of nanoscale zero-valent iron powder and 1%-10% of scrap iron. When the nanoscale iron ball prepared by the preparation method is used for treating contaminated sludge and water, the basic decontamination performance of the nanoscale zero-valent iron powder can be kept, and the shortcomings of easiness in oxidization, difficulty in separation and the like of the nanoscale zero-valent iron powder can be overcome, the oxidizing velocity of NZVI (nanoscale zero-valent iron) particles is adjusted, and the utilization efficiency of the NZVI particles is improved. Therefore, the functional nanoscale iron ball can be used for practical engineering of contaminated sludge and water treatment on a large scale.
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Property | Measurement | Unit |
Granularity | 10.0 ~ 60.0 | mesh |
Diameter | 0.2 ~ 6.0 | mm |
Diameter | 3.2 | mm |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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