SULFIDATED NANOSCALE ZERO VALENT IRON PARTICLE AS WELL AS PREPARATION METHOD AND APPLICATION THEREOF
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United States of America Patent
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Issued Date -
Nov 19, 2020
app pub date -
May 8, 2020
filing date -
May 13, 2019
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Abstract
The present disclosure relates to a sulfidated nanoscale zero valent iron particle, as well as a preparation method and application thereof. The preparation method of the sulfidated nZVI particle includes the following steps: 1) ferrous salt is reacted with NaBH4 to prepare nZVI particles; and 2) mixing the nZVI particles with the elemental sulfur powder to prepare the iron sulfides layer-coated nZVI particles. The present disclosure uses elemental sulfur powder as a sulfur source for coating the nZVI particles. The reaction conditions are mild, easy to operate, and the production cost is low. Thus, the technical solution of the present disclosure is convenient for large-scale production, and the prepared sulfidated nZVI particles have high selectivity and reductive transformation capacity for target contaminants, and thus can be used in large-scale remediation of contaminated groundwater or soil.
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