Abstract: In
this study, a novel, low-cost, natural, and highly effective
adsorbent, chitosan (Ch) -diatomite (D) composite was synthesized.
Ch-D composite
was tested as
an effective and alternative adsorbent for the removal of Pb2+
ions. The Ch-D composite
was characterized by FT-IR, SEM-EDX and PZC analyses. The
adsorption process
of Pb2+
ions onto Ch-D as initial lead concentration, solution
pH, temperature,
contact time and
recovery was
investigated. From
the adsorption process results, it has been observed that the highest
removal efficiency is approximately 95% at a contact time of 4-hour,
initial Pb2+
concentration
of 500 mg L-1
and agitation speed of 150 rpm at natural pH 4.0.
The maximum Pb2+
adsorption
capacity from the Langmuir model was found
as 0.154
mol kg-1
at 25 oC.
Besides,
adsorption kinetics was also explained with pseudo-first-order
models. Adsorption
thermodynamics have shown that Pb2+
adsorption onto Ch-D is possible, spontaneous and exothermic. Ch-D
composite can become an alternative adsorbent for the treatment of
lead ions in the wastewater.
Sivas Cumhuriyet Üniversitesi
ZARA004
The present study (Project no: ZARA004) was supported by the Cumhuriyet University Scientific Research Projects Commission. The authors strongly declare that no scientific and/or financial conflicts of interest, exists with other people or institutions.
ZARA004
Primary Language | English |
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Subjects | Physical Chemistry |
Journal Section | Articles |
Authors | |
Project Number | ZARA004 |
Publication Date | February 15, 2020 |
Submission Date | October 18, 2019 |
Acceptance Date | January 20, 2020 |
Published in Issue | Year 2020 Volume: 7 Issue: 1 |