Biosorption of nickel and cobalt from plant effluent by Sargassum glaucescens nanoparticles at new membrane reactor|
Esmaeili, A. & Aghababai Beni, A.
In this study, brown algae (Sargassum glaucescens)
nanoparticles were prepared by using a planetary
ball mill to remove nickel and cobalt. The biosorption
reaction in the reactor was studied under different conditions
of pH, biosorbent dose, temperature, and retention
time. The concentration of heavy metals was investigated
after the fluid had passed through the membrane system.
Algae nano-biosorbent was prepared using a planetary ball
mill; scanning electron microscope and Brunauer–Emmert–
Teller tests showed an average diameter of 95.75 nm
and specific surface area of 11.25 m2/g, respectively. A
maximum biosorption efficiency equal to 93 and 91 % was
achieved for nickel and cobalt at pH 6, temperature 35 °C
with a retention time of 80 min, and at biosorbent doses of
8 and 4 g/l. The kinetic data fit well by pseudo-first-order
model, and equilibrium data of metal ions could be
described well with the Langmuir and Dubinin–Radushkevich
isotherm models. The calculated thermodynamic
parameters showed that metal ion biosorption is feasible,
endothermic, and naturally spontaneous.
Membrane reactor; Nanoparticle; Biosorption; Water treatment; Nickel; Cobalt