EFFICIENT ADSORPTION OF AQUEOUS Pb2+ IN WASTE WATER BY Ca-Al-HPO4 LAYERED DOUBLE HYDROXIDE
| Main Author: | , M. Said Karyani, Roto, Eko Sugiharto |
|---|---|
| Format: | Article NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Fak. MIPA Universitas Gadjah Mada
, 2007
|
| Online Access: |
https://repository.ugm.ac.id/93898/ http://repository.ugm.ac.id/digitasi/index.php?module=cari_hasil_full&idbuku=1693 |
Daftar Isi:
- <p>Interests in layered double hydroxides (LDHs) and their derivative materials arise extensively due to many possible applications one of which is as adsorbents for metal pollutants. This study shows that LDH of Ca-Al-HPO4 is an effective adsorbent for aqueous Pb2+ solution. Preparation of Ca-Al-HPO4 LDH was performed using CaCl2, AlCl3 and Na2HPO4 by co-precipitation method at pH 4.6 and followed by hydrothermal treatment in poly propylene bottle at 90oC for 18 hours. The solid product was confirmed by X-ray diffraction, FTIR, and elemental analysis using atomic absorption spectrometry (AAS) and UV-Vis spectrometry. Morphology of the LDH was determined using SEM. Adsorption of Pb2+ by the LDH was done using batch experiment by mixing the Pb2+ solution and LDH solid. After equilibrium was reached, the pH of the mixture was measured to be 7. The remaining Pb2+ in the solution was analyzed using AAS after being separated using a centrifuge. The amount of Pb2+adsorbed by Ca-Al-HPO4 LDH was approximately 600 mg/g absorbent, which is very high. The formation of insoluble lead phosphate in the interlayer space of the LDH is believed to be the cause of this high adsorption capacity. Kinetic and mechanism of the adsorption will also be discussed in this paper.</p>