Preparation of a polyelectrolyte-coated magnetic attapulgite composite for the adsorption of precious metals

Insight into the synergistic effect on adsorption for Cr(vi) by a polypyrrole-based composite

“…As the number of adsorption cycles increases, the decrease of Cr(VI) removal can be attributed to the consumption of the PPy/Fe 3 O 4 / ATP composite and the blocked active sites by the adsorbed Cr(VI) and Cr(III). 38 However, the removal was still higher than 60% aer the four adsorption-desorption processes, possibly due to the formation of stable network of PPy/Fe 3 O 4 /ATP composite. 39 The low cost of the separation and regeneration of a material is critical for its application as an adsorbent and will make the adsorbent in large-scale application.…”

Recent progress in dispersion of palygorskite crystal bundles for nanocomposites

“…Our group adopted highly dispersed nanoscale Pal to fabricate magnetic Fe 3 O 4 / Pal@(CS/Cys-β-CD) 8 (Mu et al, 2013) and Pal/Fe 3 O 4 /polyaniline adsorbents, which shows superior adsorption capability to noble metal ions and dyes. H. Lu et al (2014) used the nanoscale Pal to prepare Pal/zero-valent iron nanocomposite, which shows excellent adsorption properties for Cr(VI).…”

Preparation, characterization and application on dye adsorption of a well-defined two-dimensional superparamagnetic clay/polyaniline/Fe3O4 nanocomposite

“…After being incorporating into PANI and Fe 3 O 4 , it could be found that the diffraction peaks of Mt/PANI/Fe 3 O 4 nanocomposites were different to that of the original Mt. Firstly, several characteristic diffraction peaks located at 2θ = 30.1°, 35.5°, 43.2°, 54.0°, 57.2°, and 62.7°were observed, which could be ascribed to the planes of (220), (311), (400), (422), (511) and (440) of Fe 3 O 4 , respectively (Mu et al, 2013;Mitchell et al, 2014). All the peaks could be readily identified as the pure cubic phase [space group: Fd3m (227)] of Fe 3 O 4 with cell constants a = 8.389 Å (JCPDS 01-074-1910).…”