The present work focused on designing and preparing a nature-based composite in film form
to be used as an adsorbent for toxic dyes from wastewater. The composite film was prepared by a
double decomposition and coprecipitation methods using hydroxyapatite (HAp), hydroxyethyl
cellulose (HEC), and polyethylene glycol (PEG)-1000. Several films with various proportions were
prepared. HEC used in this study was prepared from cellulose extracted from the natural plant Sparta
“Stipa tenacissima” that is grown in the eastern region of Morocco. Prepared composite films were
water insoluble, smooth, and flexible. The films were characterized by attenuated total reflectance
infrared spectroscopy, thermal gravimetric analysis (differential thermal analysis), field emission
scanning electron microscopy, and X-ray diffraction. The tendencies of the films for adsorbing
methyl orange (MO) from water were evaluated. The film adsorption efficiencies were monitored by
ultraviolet spectroscopy. Experimental data were described by Langmuir and Freundlich isotherm
models. Results showed that the equilibrium data of MO adsorption were best represented by
Freundlich isotherm model. The kinetic data of MO fitted well with the pseudo-second-order kinetic
model. The results demonstrated that HAp/HEC/PEG composite achieved favorable removal of
the toxic dye MO from water. The high efficiency of the composite toward MO could be related to
the multi-coordination sites available on the film surface, the H-bonding sites, and the availability
of macro tunnels in the composite structure. The antibacterial activities of several films were evaluated
against gram-positive and gram-negative bacteria; all tested samples showed moderate to good
activities. The results suggest that the composite of this study could be used as a potential low-cost
alternative for removal of toxic dyes and bacteria from industrial wastewater.

العنوان

Desalination and Water Treatment

الناشر

Taylor and francis

بلد الناشر

هولندا

Indexing

Thomson Reuters

معامل التأثير

1,87

نوع المنشور

مطبوع فقط

المجلد

149

السنة

2019

الصفحات

194-208