# Synthesis of Cancrinite Zeolite From Toraja Natural Bentonite for Heavy Metal Removal From Wastewater
> Astuti Y.

URL kanonis: https://discover.unhas.ac.id/publications/synthesis-of-cancrinite-zeolite-from-toraja-natural-bentonite-for-heavy-metal-re
Jurnal / Konferensi: Karbala International Journal of Modern Science
Tahun terbit: 2025
DOI: https://doi.org/10.33640/2405-609X.3420
ISSN: 2405609X
Kuartil SJR: Q2
Citations: 0

## Authors
- Astuti Y.

## Abstract
This study explores the production of cancrinite (CAN) zeolite from bentonite found in Toraja (a place in South Sulawesi Province, Indonesia) and its effectiveness in removing Pb2+ and Fe3+ ions from wastewater. The synthesis was carried out using a hydrothermal method with varying NaOH concentrations, where a single phase of zeolite was formed at 5 M, as confirmed through XRD analysis. FTIR results showed the characteristics of CAN zeolite with typical absorption peaks at 676, 622, and 565 cm-1, as well as the presence of carbonate groups (CO₃2-) at 1300-1400 cm-1. SEM analysis revealed thin columnar needle-like crystals characteristic of CAN zeolite. Nitrogen adsorption-desorption tests revealed that CAN zeolite is mesoporous with an average pore size of 5.38 nm and a specific surface area of 51.97 m²/g. The optimal conditions for Pb2+ adsorption were achieved with a contact time of 180 minutes and a pH of 5, while for Fe3+, the optimal conditions were a contact time of 30 min and a pH of 3. The adsorption isotherm was evaluated using Langmuir, Freundlich, and Sips models, with the best described by the Sips model in non-linear fitting. The maximum adsorption capacities for Pb2+ and Fe3+ ions were 194.95 mg/g and 196.63 mg/g, respectively. The adsorption kinetics for both ions followed a pseudo-second-order kinetic model. This study reports about natural Toraja bentonite, a rarely explored precursor for CAN zeolite synthesis. It also assesses the zeolite's adsorption capacity for two metal ions of different valences, highlighting its potential in wastewater treatment.

## Keywords
- Zeolite
- Adsorption
- Bentonite
- Wastewater
- Metal ions in aqueous solution
- Chemistry
- Metal
- Fourier transform infrared spectroscopy
- Hydrothermal circulation
- Chemical engineering
- Inorganic chemistry
- Mesoporous material
- Nuclear chemistry
- Carbonate
- Phase (matter)
- Mineralogy
- Absorption (acoustics)
- Materials science
- Specific surface area
- Ion
- Molecular sieve
- Alkalinity
- Hydrothermal synthesis

---
Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
Saat mengutip, gunakan DOI bila tersedia atau URL kanonis di atas.