Preparation and Application of Loess-based Adsorbent for the Removal of Lead ions from Aqueous Solution

Loess is a naturally occurring mineral particle that is widely dispersed around the planet. It is also affordable, non-toxic, and readily accessible. A loess clay-based co-polymer, KHLC/PAA, was produced to support the functional monomer acrylic acid in an in situ polymerization process using N-N methylene bisacrylamide as a cross-linking agent. It was characterized by Scanning Electron Microscopy, Fourier Transformation Infrared spectroscopy, X-ray diffractometry, X-ray fluorescence spectroscopy, and thermal gravimetric analysis, followed by the examination of its adsorption capability for removing lead ions (Pb۲+) from aqueous solution at room temperature in ۶۰ minutes, which appeared to be ۱۵۹.۱ mg/g. The thermodynamic data showed that the adsorption process was practicable, spontaneous, and endothermic, and the experimental results suited the pseudo-second-order kinetic model and the Langmuir adsorption isotherm well. Consequently, KHLC/PAA is a potentially beneficial material for wastewater treatment as it is an inexpensive, environment-friendly adsorbent.

کلیدواژه ها:

In situ polymerization ، Loess ، Adsorption ، Lead ions ، Wastewater