Preparation of an avocado seed hydrochar and its application as heavy metal adsorbent: Properties and advanced statistical physics modeling

The nanobentonite has been synthesized from natural bentonite taken from Tapanuli Utara, Indonesia using coprecipitation method with various solvents (HCl, H2SO4, and HNO3). Its properties as a metal adsorbent were investigated by Atomic Adsorption Spectrophotometry. X-Ray Diffraction analysis revealed that the bentonite produced is in nanometer scale. The characterization results obtained from the SiO2single phase with highest dhkl was at millier index (101) with 2 of 21.9o, 22.0o, 22.07o respectively. The results of Microscope-Scanning Electron Energy analysis of nanobentonite dispersion indicated a reduction in agglomeration and finer nanobentonite surface. The Surface Area Analyzer results showed the SBET nanobentonite for solvent variation of HCL, H2SO4, and HNO3 respectively were 731.76 m2/g, 868.11 m2/g, 493.97 m2/ g. Lastly, Atomic Adsorption Spectrophotometric test showed that the optimal absorption of the metal content possessed by variety of HCl and nanobentonites with adsorption power of 91.16% for Pb, 76.39% for Cu, and 82.74% Co.

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Statistical physics modeling of ethanol adsorption onto the phenol resin based adsorbents: Stereographic, energetic and thermodynamic investigations

Journal of Molecular Liquids ◽

10.1016/j.molliq.2019.03.129 ◽

2019 ◽

Vol 283 ◽

pp. 674-687 ◽

Cited By ~ 8

Author(s):

Mohamed Bouzid ◽

Nadia Bouaziz ◽

Yosra Ben Torkia ◽

Abdelmottaleb Ben Lamine

Keyword(s):

Statistical Physics ◽

Phenol Resin ◽

Physics Modeling ◽

Ethanol Adsorption

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A novel experimental technique for the fabrication of the vitamin B12 nucleus using quartz crystal microbalance: Statistical physics modeling and new microscopic properties

AIP Advances ◽

10.1063/5.0009916 ◽

2020 ◽

Vol 10 (5) ◽

pp. 055324

Author(s):

Manel Ben Yahia ◽

Mohamed Ben Yahia

Keyword(s):

Vitamin B12 ◽

Quartz Crystal Microbalance ◽

Experimental Technique ◽

Statistical Physics ◽

Quartz Crystal ◽

Physics Modeling

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Statistical physics modeling of water vapor adsorption isotherm into kernels of dates: Experiments, microscopic interpretation and thermodynamic functions evaluation

Arabian Journal of Chemistry ◽

10.1016/j.arabjc.2019.11.004 ◽

2020 ◽

Vol 13 (3) ◽

pp. 4691-4702 ◽

Cited By ~ 2

Author(s):

Haifa Alyousef ◽

Mohamed Ben Yahia ◽

Fatma Aouaini

Keyword(s):

Water Vapor ◽

Adsorption Isotherm ◽

Thermodynamic Functions ◽

Statistical Physics ◽

Water Vapor Adsorption ◽

Vapor Adsorption ◽

Microscopic Interpretation ◽

Physics Modeling

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Sodium hydroxide modified rice husk for enhanced removal of copper ions

Water Science & Technology ◽

10.2166/wst.2018.395 ◽

2018 ◽

Vol 78 (7) ◽

pp. 1615-1623 ◽

Cited By ~ 1

Author(s):

N. Priyantha ◽

H. K. W. Sandamali ◽

T. P. K. Kulasooriya

Keyword(s):

Heavy Metal ◽

Adsorption Capacity ◽

Rice Husk ◽

Copper Ions ◽

Maximum Adsorption Capacity ◽

Adsorption Model ◽

Natural Form ◽

Langmuir Adsorption ◽

Pseudo Second Order ◽

Heavy Metal Adsorbent

Abstract Although rice husk (RH) is a readily available, natural, heavy metal adsorbent, adsorption capacity in its natural form is insufficient for certain heavy metal ions. In this context, the study is based on enhancement of the adsorption capacity of RH for Cu(II). NaOH modified rice husk (SRH) shows higher extent of removal for Cu(II) ions than that of heated rice husk (HRH) and HNO3 modified rice husk (NRH). The extent of removal of SRH is increased with the concentration of NaOH, and the optimum NaOH concentration is 0.2 mol dm−3, used to modify rice husk for further studies. The surface area of SRH is 215 m2 g−1, which is twice as much as that of HRH according to previous studies. The sorption of Cu(II) on SRH obeys the Langmuir adsorption model, leading to the maximum adsorption capacity of 1.19 × 104 mg kg−1. Kinetics studies show that the interaction of Cu(II) with SRH obeys pseudo second order kinetics. The X-ray fluorescence spectroscopy confirms the adsorption of Cu(II) on SRH, while desorption studies confirm that Cu(II) adsorbed on SRH does not leach it back to water under normal conditions.

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