Activated hydrochar from palm leaves as efficient lead adsorbent

Hassan H. Hammud; Ranjith Kumar Karnati; Maryam Al Shafee; Youssef Fawaz; Hanafy Holail

doi:10.1080/00986445.2019.1702975

Activated hydrochar from palm leaves as efficient lead adsorbent

Hassan H. Hammud, Ranjith Kumar Karnati, Maryam Al Shafee, Youssef Fawaz, Hanafy Holail

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

A carbon-rich hydrochar HTC-PL was prepared by hydrothermal carbonization of Phoenix dactylifera palm leaves. HTC-PL was chemically modified with H2O2 to give activated AHTC-PL. High-resolution transmission electron microscope HRTEM of AHTC-PL indicated sponge-like cubic mesoporous nanostructures. Thermal analysis of HTC-PL and AHTC-PL shows two degradation steps around 330 and 400 °C. The physico-chemical properties and energy generation capability of hydrochar HTC-PL were evaluated. The hydrochar has higher heating value of 20.95 MJ/kg. Langmuir isotherm and pseudo-second-order kinetic provided the best fit to the adsorption data of lead by HTC-PL materials. Removal of lead by AHTC-PL at 25 °C resulted in an adsorption capacity of 74.5 mg/g while that of HTC-PL biochar is 17.8 mg/g. The adsorption data using a fixed-column technique were best fitted by Thomas model. The % removal efficiency of Pb2+ ions by AHTC-PL column was almost unchanged for three cycles.

Original language	English (US)
Pages (from-to)	197-209
Number of pages	13
Journal	Chemical Engineering Communications
Volume	208
Issue number	2
DOIs	https://doi.org/10.1080/00986445.2019.1702975
State	Published - Dec 18 2019
Externally published	Yes

ASJC Scopus subject areas

General Chemical Engineering
General Chemistry

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10.1080/00986445.2019.1702975

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title = "Activated hydrochar from palm leaves as efficient lead adsorbent",

abstract = "A carbon-rich hydrochar HTC-PL was prepared by hydrothermal carbonization of Phoenix dactylifera palm leaves. HTC-PL was chemically modified with H2O2 to give activated AHTC-PL. High-resolution transmission electron microscope HRTEM of AHTC-PL indicated sponge-like cubic mesoporous nanostructures. Thermal analysis of HTC-PL and AHTC-PL shows two degradation steps around 330 and 400 °C. The physico-chemical properties and energy generation capability of hydrochar HTC-PL were evaluated. The hydrochar has higher heating value of 20.95 MJ/kg. Langmuir isotherm and pseudo-second-order kinetic provided the best fit to the adsorption data of lead by HTC-PL materials. Removal of lead by AHTC-PL at 25 °C resulted in an adsorption capacity of 74.5 mg/g while that of HTC-PL biochar is 17.8 mg/g. The adsorption data using a fixed-column technique were best fitted by Thomas model. The % removal efficiency of Pb2+ ions by AHTC-PL column was almost unchanged for three cycles.",

author = "Hammud, {Hassan H.} and Karnati, {Ranjith Kumar} and {Al Shafee}, Maryam and Youssef Fawaz and Hanafy Holail",

note = "KAUST Repository Item: Exported on 2022-06-13 Acknowledgements: The authors acknowledge the Deanship of Scientific Research at King Faisal University for the financial support of Research Project [grant No. 160047]. The authors also acknowledge King Abdullah University of Science and Technology (KAUST) for TEM measurements and analysis performed by Dr. Rachid Sougrat of the KAUST Core Lab Facilities and Dr. Mani Sarathy of the Clean Combustion Research Center (CCRC). This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

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AU - Karnati, Ranjith Kumar

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AU - Holail, Hanafy

N1 - KAUST Repository Item: Exported on 2022-06-13 Acknowledgements: The authors acknowledge the Deanship of Scientific Research at King Faisal University for the financial support of Research Project [grant No. 160047]. The authors also acknowledge King Abdullah University of Science and Technology (KAUST) for TEM measurements and analysis performed by Dr. Rachid Sougrat of the KAUST Core Lab Facilities and Dr. Mani Sarathy of the Clean Combustion Research Center (CCRC). This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2019/12/18

Y1 - 2019/12/18

N2 - A carbon-rich hydrochar HTC-PL was prepared by hydrothermal carbonization of Phoenix dactylifera palm leaves. HTC-PL was chemically modified with H2O2 to give activated AHTC-PL. High-resolution transmission electron microscope HRTEM of AHTC-PL indicated sponge-like cubic mesoporous nanostructures. Thermal analysis of HTC-PL and AHTC-PL shows two degradation steps around 330 and 400 °C. The physico-chemical properties and energy generation capability of hydrochar HTC-PL were evaluated. The hydrochar has higher heating value of 20.95 MJ/kg. Langmuir isotherm and pseudo-second-order kinetic provided the best fit to the adsorption data of lead by HTC-PL materials. Removal of lead by AHTC-PL at 25 °C resulted in an adsorption capacity of 74.5 mg/g while that of HTC-PL biochar is 17.8 mg/g. The adsorption data using a fixed-column technique were best fitted by Thomas model. The % removal efficiency of Pb2+ ions by AHTC-PL column was almost unchanged for three cycles.

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Activated hydrochar from palm leaves as efficient lead adsorbent

Abstract

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