Adsorption of phosphate on iron oxide doped halloysite nanotubes
作者： Dema A. Almasri , Navid B. Saleh , Muataz A. Atieh , Gordon McKay , Said Ahzi
DOI: 10.1038/S41598-019-39035-2
关键词:
摘要: Excess phosphate in water is known to cause eutrophication, and its removal imperative. Nanoclay minerals are widely used environmental remediation due their low-cost, adequate availability, compatibility, adsorption efficiency. However, the of anions with nanoclays not very effective because electrostatic repulsion from clay surfaces a net negative charge. Among minerals, halloysite nanotubes (HNTs) possess negatively charged exterior positively inner lumen. This provides an increased affinity for anion removal. In this study, HNTs modified nano-scale iron oxide (Fe2O3) enhance capacity nanosorbent. modification allowed distribution these surfaces, which sorb via ligand exchange by forming inner-sphere complexes. A detailed characterization raw (Fe-HNT) conducted. Influences Fe2O3 loading, adsorbent dosage, contact time, pH, initial concentration, coexisting ions on studied. Results demonstrate that Fe-HNT pH-dependent fast kinetics. The underlying mechanism identified as combination attraction, exchange, Lewis acid-base interactions. nanomaterial promising results application water/wastewater treatment.
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