Details

Autor(en) / Beteiligte

• Rehman, Saeed
• Huang, Zhiyan
• Wu, Pingxiao
• Ahmed, Zubair
• Ye, Quanyun
• Liu, Junqin
• Zhu, Nengwu

Titel

Adsorption of lead and antimony in the presence and absence of EDTA by a new vermiculite product with potential recyclability

Ist Teil von

• Environmental science and pollution research international, 2021-09, Vol.28 (35), p.49112-49124

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A new two-step modification method has been proposed where 1.8% HCl and 3.1% HNO 3 were applied to modify the interlayer of vermiculite (VMT). This product was given 90 °C of heat in 30% H 2 SO 4 solution that was used for Pb (II) and Sb (III) adsorption. The EDTA presence on the individual adsorption was assessed. X-ray diffraction revealed that the VMT inter-stratified reflection through acid intercalation within the interlayer decreased the parallel gaps between the atoms, witnessing on the outer-sphere adsorption. The driving force was found electrostatic, which fits well with pseudo-second-order kinetics and Langmuir isotherm. The Pb (II) and Sb (III) uptake followed descending order adsorption with increasing concentration of chelating EDTA. Three consecutive desorption cycles revealed that the prepared adsorbent was suitable that may be regarded as a good candidate for complex wastewaters.