Abstract
In this work, novel flower-like nanoscale zero-valent iron/zinc oxide heterostructure composites were prepared, characterised and used for the enhanced removal of Se(IV) from water. The morphological identification showed that nZVI nanoparticles were uniformly loaded on ZnO nanosheets to minimise their aggregation. Batch experimental results demonstrated that the composites exhibited higher removal efficiency and rate constant on Se(IV) immobilisation than pristine flower-like ZnO and nZVI because of the enhanced dispersion of nZVI nanoparticles. Solution pH, initial Se(IV) concentration as well as interfering ions that affect the removal capacity of Se(IV) were further studied. These results suggested that the composites could be a promising candidate for the potential application in effective remediation of Se-contaminated wastewater.
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