ADSORPTION OF CD2+ ION USING FLOATING BEAD ?-CARRAGEENAN ADSORBENT WITH K2CO3 AND CACO3 AS PORE-FORMING AGENTS
Water pollution is a significant concern within communities, primarily due to industrial waste. Industrial waste contains heavy metal ions that can pollute the environment and threaten the health of living organisms. Cadmium is one of the hazardous metal ions found in industrial waste, fertili...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/83011 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Water pollution is a significant concern within communities, primarily due to industrial waste.
Industrial waste contains heavy metal ions that can pollute the environment and threaten the
health of living organisms. Cadmium is one of the hazardous metal ions found in industrial
waste, fertilizers, and water sources, accumulating in living organisms, including humans.
Exposure to cadmium ions in humans can lead to lung, kidney, bone, and reproductive organ
diseases, as well as cancer. Cadmium ions in contaminated solutions can be reduced using the
adsorption method with floating ?-carrageenan bead adsorbents. Carrageenan is a
polysaccharide composed of D-galactose and 3,6-anhydrogalactose with alternating ?-1,3 and
?-1,4 glycosidic bonds. Among various types of carrageenan, ?-carrageenan is known for its
strong gel-forming properties. The ?-carrageenan beads contain cavities filled with CO2 gas
produced from the reaction between CO3
2? and HNO3, resulting a floating adsorbent that is
easy to retrieve after the adsorption process and has an enhanced absorption capacity for
cadmium ions from contaminated solutions. The floating ?-carrageenan bead adsorbent has a
floating time of 8 hours with a swelling degree percentage of 843,91%. FTIR characterization
of the floating ?-carrageenan bead adsorbent successfully showed characteristic peaks of
?-carrageenan in the fingerprint region. The morphological differences of the adsorbent before
and after the adsorption process with cadmium ions were characterized using SEM. The
cadmium element's atomic percentage on the floating ?-carrageenan bead adsorbent after the
adsorption process with cadmium ions was characterized using EDS. The adsorption
performance of cadmium ions by the floating ?-carrageenan bead adsorbent was tested by
analyzing the remaining concentration of cadmium ions using atomic absorption
spectrophotometry (AAS). The optimal conditions for cadmium ion adsorption using the
floating ?-carrageenan bead adsorbent occurred at pH 3, with an adsorbent mass of 0,1 grams
and a contact time of 5 minutes. The adsorption of cadmium ions using the floating
?-carrageenan bead adsorbent followed the pseudo-second-order adsorption kinetics model
and the Langmuir adsorption isotherm model, with a ???? of 16,85 mg/g at a temperature of
50 ?. The thermodynamics of cadmium ion adsorption using the floating ?-carrageenan bead
adsorbent indicated a spontaneous, endothermic process with an unordered system |
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