TITLE:
Adsorption of Propazine, Simazine and Bisphenol A on the Surface of Nanoparticles of Iron Oxide Nanoparticles of Carbon and Metallic Oxides
AUTHORS:
Matthewos Eshete, Jerrano Bowleg, Selene G. Perales, Maxwell Okunrobo, Dominique Watkins, Hattie Spencer
KEYWORDS:
Triazine, Adsorption of Nanoparticles, Nanoparticles of Iron Oxide, Nanoparticles of Carbon, Bisphenol A
JOURNAL NAME:
Journal of Environmental Protection,
Vol.9 No.1,
January
12,
2018
ABSTRACT: Simazine and propazine are selective triazine herbicides currently in use to
control broad-leaved weeds and annual grasses around the world. Bisphenol A
(BPA) is an industrial chemical used in the production of polycarbonate plastics
often found in consumer goods, such as plastic containers, baby bottles
etc. These synthetic compounds are known to increase the risk of cancer,
cause adverse reproductive effect in reptiles, mammals, birds, humans, and
lead to other health problems. They have become some of the principal agents
of contamination in water bodies around the world through herbicide runoff,
industrial waste and leaching. Some triazines such as atrazine are banned in
most European countries for over ten years due to their adverse reproductive
effect in mammals, birds and humans; however propazine and simazine are
still in use around the world. The removal of these compounds from contaminated
water is an exigent challenge. In this study, we investigated their affinity
for the surface of nanoparticles (NPS) and standard metallic oxides in
an effort to exploit the unique potential applications of NPS for water purification
systems. We studied the adsorption of the two triazines and BPA on
the surface of NPS of iron (III) oxide, NPS of carbon, bulk iron (III) oxide and
aluminum oxide at pH 6 and pH 8 using UV-Visible spectroscopy. Result indicates
that these compounds have different affinity towards the surface of
metallic oxides and carbon at various pHs. In general, there is relatively high
adsorption of some of these compounds on the surface of NPS compared to
bulk particles. NPS of carbon have shown the highest affinity for all the three
compounds. The lower pH was found to be favorable for all of the compounds
except for BPA. BPA have shown high adsorption at pH 8 than at pH 6.