Fabricating whole pine needles biomass with phenylhydrazine-4-sulphonic acid for effective removal of cationic dyes and heavy metal ions from wastewater.
Chemosphere
; 364: 143103, 2024 Sep.
Article
in En
| MEDLINE
| ID: mdl-39154760
ABSTRACT
We applied a holistic, sustainable, and green approach to develop an effective multipurpose adsorbent from whole pine needles (PNs), a forest waste lignocellulosic biomass. The PNs were oxidized and modified with phenylhydrazine-4-sulphonic acid (ɸHSO3H) to OPN-ɸHSO3H. The latter was characterized and tested as an adsorbent for cationic dyes, malachite green (MG), methylene blue (MB), crystal violet (CV), and metal ions (Hg2⺠and Pb2âº). The adsorption followed different kinetic models Elovich for MG and MB, pseudo-second-order for CV, and pseudo-first-order for Hg2⺠and Pb2âº. Langmuir isotherm indicated maximum adsorption capacities of 303.4 ± 8.91 mgg-1 (MG), 331.4 ± 17.50 mgg-1 (MB), 376.6 ± 22.47 mgg-1 (CV), 210.8 ± 28.86 mgg-1 (Hg2âº), and 172.9 ± 20.93 mgg-1 (Pb2âº) within 30 min. Maximum removal efficiencies were 99.0% (MG), 98.0% (MB), 96.04% (CV), 95.5% (Hg2âº), and 89.8% (Pb2âº). The adsorbent demonstrated significant regeneration and reusability over ten cycles, proving highly efficient for both cationic dyes and metal ions, with wide potential for practical applications where more than one adsorbate is present.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Phenylhydrazines
/
Water Pollutants, Chemical
/
Biomass
/
Metals, Heavy
/
Pinus
/
Coloring Agents
/
Wastewater
Language:
En
Journal:
Chemosphere
Year:
2024
Document type:
Article
Country of publication:
Reino Unido