TY - JOUR
T1 - Chromium adsorption on surface activated biochar made from tannery liming sludge
T2 - A waste-to-wealth approach
AU - Hashem, Md. Abul
AU - Payel, Sofia
AU - Mim, Sadia
AU - Hasan, Md. Anik
AU - Nur-A-Tomal, Md. Shahruk
AU - Rahman, Md. Aminur
AU - Sarker, Majher I.
N1 - Funding Information:
The authors are grateful to the Committee for Advanced Studies and Research (CASR) at Khulna University of Engineering and Technology in Khulna, Bangladesh for the necessary support.
Publisher Copyright:
© 2022 Hohai University
PY - 2022/12
Y1 - 2022/12
N2 - In a beamhouse, liming plays a key role in the removal of hair/wool and epidermis, but problems are created when waste liming sludge is discharged to the environment. The treatment of tannery wastewater is another major challenge to the industry. In this study, thermally-activated biochars derived from liming sludge were studied for their effective adsorption of chromium (Cr) from the tannery wastewater. The thermally activated biochars (B500, B550, B600, and B650) were prepared at different temperatures from the liming sludge. Their characteristics before and after the treatment were investigated using Fourier transform infrared spectroscopy, energy dispersive X-ray spectroscopy, Brunauer–Emmett–Teller, and scanning electron microscopy analyses. The related functional groups (C–H, O–H, C–N, and =C–O) and chromium adsorption capacity were determined according to the surface morphology, element contents (C, O, Ca, Na, Al, Mg, and Si), surface area (5.8–9.2 m2/g), pore size (5.22–5.53 nm), and particle size (652–1 034 nm) of the experimental biochars. The biochar originated at 600°C from the tannery liming sludge (B600) had a greater surface area with a chromium adsorption capacity of 99.8% in comparison to B500, B550, and B650 biochars. This study developed an innovative way of utilizing liming sludge waste to minimize the pollution load and wastewater treatment cost in the tannery industry.
AB - In a beamhouse, liming plays a key role in the removal of hair/wool and epidermis, but problems are created when waste liming sludge is discharged to the environment. The treatment of tannery wastewater is another major challenge to the industry. In this study, thermally-activated biochars derived from liming sludge were studied for their effective adsorption of chromium (Cr) from the tannery wastewater. The thermally activated biochars (B500, B550, B600, and B650) were prepared at different temperatures from the liming sludge. Their characteristics before and after the treatment were investigated using Fourier transform infrared spectroscopy, energy dispersive X-ray spectroscopy, Brunauer–Emmett–Teller, and scanning electron microscopy analyses. The related functional groups (C–H, O–H, C–N, and =C–O) and chromium adsorption capacity were determined according to the surface morphology, element contents (C, O, Ca, Na, Al, Mg, and Si), surface area (5.8–9.2 m2/g), pore size (5.22–5.53 nm), and particle size (652–1 034 nm) of the experimental biochars. The biochar originated at 600°C from the tannery liming sludge (B600) had a greater surface area with a chromium adsorption capacity of 99.8% in comparison to B500, B550, and B650 biochars. This study developed an innovative way of utilizing liming sludge waste to minimize the pollution load and wastewater treatment cost in the tannery industry.
KW - Adsorption
KW - Biochar application
KW - Solid waste
KW - Tannery
KW - Thermal modification
KW - Waste recycling
UR - http://www.scopus.com/inward/record.url?scp=85138775915&partnerID=8YFLogxK
U2 - 10.1016/j.wse.2022.09.001
DO - 10.1016/j.wse.2022.09.001
M3 - Article
AN - SCOPUS:85138775915
SN - 1674-2370
VL - 15
SP - 328
EP - 336
JO - Water Science and Engineering
JF - Water Science and Engineering
IS - 4
ER -
