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- Title
Extraction of Pb from dilute solution by paramagnetic Fe 3 O 4 @ SiO 2 @ Clpr-silica @ dithizone solid-phase nanoextractant.
- Authors
Ma, Jie; Cheng, Guoliang; Basov, Sergey; Zhang, Shuping; Ji, Tingting
- Abstract
A paramagnetic solid phase nanoextractant, Fe3O4@ SiO2@ Clpr-silica @ dithizone, is firstly constructed for separating Pb2+from dilute solution. The special extractant is composed of a paramagnetic Fe3O4nanomaterials core, amorphous silica, chloro-propyl silane coupling agent, and dithizone from inside to outside. The experimental results demonstrate the as-obtained extractant fine adsorbability, high adsorption and desorption speed, wide acidic resistance, facile separability, and admirable reusability. The adsorption capacity of the extractant exceeds 63.4 mg g−1, and the adsorption process is accomplished in 25 s. Pb2+ions are completely eluted from the extractant immersed into 2 M HNO3solution in 20 s. After five times of adsorption-regeneration cycles, no significant loss of adsorption capacity is observed, indicating the good stability of the extractant.
- Subjects
METAL content of industrial wastes; HEAVY metal content of water; HEAVY metal toxicology; NANOSTRUCTURED materials; EXTRACTION (Chemistry)
- Publication
Desalination & Water Treatment, 2014, Vol 52, Issue 40-42, p7898
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2013.833878