Abstract:
Disposal of pesticides into the water can cause a huge environmental issue for a few
decades. It can also affect human health with negative consequences. Therefore, in the
novel studies, scientists mainly focus on the most effective way to eliminate pesticides
from contaminated water. Magnetic separation is a novel method of separation and
purification. The reason for the popularity of magnetic separation is because they are
biocompatible, easily separatable, low cost, high performance, and renewability.
Magnetization of bio-waste material is an environmentally friendly and cost-effective
method in water remediation. Orange peel Biomass (OPB) contains a higher amount of
pectin than other natural sources. It is easily available as well as can be used to create
magnetic particles easily with Fe3O4 due to the presence of -OH and COO- groups.
Fe3O4@Pec-OPB can partially remove the sofit pretilachlor and profenophos
pesticides from the water around the paddy fields. The concentration gradient of both
pesticides after 24 h is 70 ± 2 ppm (35%). The adsorption isotherm model of the
pesticides fits with Langmuir isotherm. Monolayer adsorption capacity(qm) of sofit
pretilachlor and profenophos are 201.26 ± 68.06 mg g-1 and 170.93 ± 44.72 mg g-1
respectively. The adsorption kinetics of both pesticides on Fe3O4@Pec-OPB followed
the pseudo-second-order kinetic model and chemisorption mechanism. Based on the
results show that using synthesized bio adsorbent represents the adsorption process
that occurs via the chemisorption mechanism and it helps to partially remove sofit
pretilachlor and profenophos from agricultural wastewater.
