Activated hydrochar from palm leaves as efficient lead adsorbent

被引：16

作者：

Hammud, Hassan H. ^{[1
]}

Karnati, Ranjith Kumar ^{[1
]}

Al Shafee, Maryam ^{[2
]}

Fawaz, Youssef ^{[2
]}

Holail, Hanafy ^{[3
]}

机构：

[1] King Faisal Univ, Fac Sci, Dept Chem, Al Hasa, Saudi Arabia

[2] Beirut Arab Univ, Fac Sci, Beirut, Lebanon

[3] Alexandria Univ, Fac Sci, Alexandria, Egypt

来源：

CHEMICAL ENGINEERING COMMUNICATIONS | 2021年 / 208卷 / 02期

关键词：

Adsorption; column; hydrochar; isotherm; kinetics; lead; HYDROTHERMAL CARBONIZATION; AQUEOUS-SOLUTION; HEATING VALUES; PLANT-MATERIAL; WASTE BIOMASS; REMOVAL; BIOCHAR; BIOSORPTION; PYROLYSIS; CHARS;

D O I：

10.1080/00986445.2019.1702975

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

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 degrees 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 degrees 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.

引用

页码：197 / 209

页数：13

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