Preparation and Properties of Nano-Hydroxyapatite Derived from Sol-Gel Method for Cu2+ Polluted Water

Nano-hydroxyapatite (HAP) were prepared by sol-gel method with Ca(NO3)2•4H2O and H3PO4 precursors. The result was shown that the powder was spherical with very little reunion and the particle size was around 50nm. The HAP adsorbent was utilized for copper removal from aqueous solutions using the batch technique. Some parameters that determine copper ion uptake including contact time, adsorbent dose, the solution temperature and initial concentration of the copper in the aqueous solution were evaluated. The experimental results shown that the removal efficiency was about 99.27% at pH 7, 40°C, contact time 60 min, adsorbent dose of 5g/L and initial concentration of 60mg/L.

Download Full-text

Characterization of copper ion catalyst encapsulated in silica matrixes by sol-gel method and their photocatalytic activity for decomposition of nitric oxide into nitrogen and oxygen at 275 K

The Journal of Physical Chemistry ◽

10.1021/j100122a006 ◽

1993 ◽

Vol 97 (20) ◽

pp. 5211-5212 ◽

Cited By ~ 17

Author(s):

Nobuaki Negishi ◽

Masaya Matsuoka ◽

Hiromi Yamashita ◽

Masakazu Anpo

Keyword(s):

Nitric Oxide ◽

Photocatalytic Activity ◽

Sol Gel ◽

Copper Ion ◽

Gel Method ◽

Sol Gel Method

Download Full-text

Synthesis of Oil Palm Frond (OPF) Based Silica Nanomaterial via Sol-gel Method with Enhanced Phenol Removal

Journal of Chemical Engineering and Industrial Biotechnology ◽

10.15282/jceib.v7i2.6917 ◽

2021 ◽

Vol 7 (2) ◽

pp. 20-26

Author(s):

N. S. Osman ◽

M. L. Ismail ◽

N. Sapawe

Keyword(s):

Aqueous Solution ◽

Oil Palm ◽

Contact Time ◽

Sol Gel ◽

Phenol Removal ◽

Gel Method ◽

Sol Gel Method ◽

Oil Palm Frond ◽

Oil Palm Industry ◽

Palm Frond

This research investigates the potential of the oil palm frond (OPF), a well-known biomass from the oil palm industry, as a feasible silica precursor that can be utilised in the removal of phenol from an aqueous solution. Dried OPF was combusted to obtain OPF ash that was treated with citric acid before being synthesised as silica nanomaterial via the sol-gel method. The FTIR results of synthesised silica exhibit a similar peak with commercially available silica. Silica material was then used for phenol removal under different parameters including pH, contact time, dosage, concentration, and temperature, then analysed using UV-Vis Spectrophotometer. The optimum condition was obtained at pH 7 within 45 mins of contact time using 0.2 g/L silica dosage under 10 ppm of phenol concentration at 303 K that aid in enhancing phenol removal by the OPF-based silica. At this condition, silica nanomaterial successfully removed up to 68% of phenol in an aqueous solution with adsorption capacity of the adsorbent is within the range of 34 mg/g. These results demonstrate the potential application of silica nanomaterial from OPF as an adsorbent in phenol removal from wastewater.

Download Full-text