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 journalArticlepeer-review

21 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 languageEnglish (US)
Pages (from-to)197-209
Number of pages13
JournalChemical Engineering Communications
Volume208
Issue number2
DOIs
StatePublished - Dec 18 2019
Externally publishedYes

Bibliographical 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.

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Chemistry

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