ADSORPTION OF PB(II) METAL IONS USING PVA-ALGINAT-PAPAYA SEEDS ADSORBENT
Lead (Pb(II)) is a metal commonly found in industries such as battery production and automotive manufacturing. Wastewater containing heavy metals poses significant environmental risks and is highly toxic to human health. Therefore, separating Pb(II) metal ions from waste solutions before disch...
Saved in:
| Main Author: | |
|---|---|
| Format: | Theses |
| Language: | Indonesia |
| Subjects: | |
| Online Access: | https://digilib.itb.ac.id/gdl/view/86705 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Lead (Pb(II)) is a metal commonly found in industries such as battery production and
automotive manufacturing. Wastewater containing heavy metals poses significant
environmental risks and is highly toxic to human health. Therefore, separating Pb(II) metal
ions from waste solutions before discharge into aquatic environments is crucial. Various
recovery methods, including solvent extraction, ion exchange, filtration, and adsorption, are
commonly used. Among these, adsorption is widely favored due to its simplicity, efficiency,
cost-effectiveness, and the abundance of natural adsorbent materials. In this study, a PVA
alginate-papaya seed (PAB) based adsorbent was synthesized to adsorb Pb(II) metal ions.
Using papaya seeds can potentially increase the adsorption capacity because they contain
cellulose and hemicellulose, which have abundant hydroxyl groups (-OH). The optimum
adsorbent composition was obtained with a variation of the 1:1 ratio of alginate and papaya
seeds. The adsorbent was characterized using Fourier Transform Infrared Spectroscopy (FTIR),
the results were evidenced by a shift in wavelength values in certain groups, followed by
Scanning Electron Microscopy (SEM)-Energy Dispersive Spectroscopy (EDS) with a Pb(II)
content value of 2%. Adsorption using 0.05 g adsorbent reached optimum condition at pH 4
and contact time of 1440 min, with adsorption efficiency reaching 90%. The adsorption process
followed a pseudo-second-order kinetics model with an experimental adsorption capacity (qm)
of 22.4125 mg/g and a Langmuir adsorption isotherm model with an adsorption capacity (qmax)
= 66 mg/g. Thermodynamic analysis showed that the adsorption was endothermic with ?H =
0.0146 kJ/mol, ?S = 1.1492 kJ/K mol, and the adsorption process was spontaneous. Repeated
use of the adsorbent for 3 adsorption-desorption cycles with 0.1 M HNO3 desorption agent
gave a good. |
|---|