TY - JOUR
T1 - Low-cost biochar adsorbents prepared from date and delonix regia seeds for heavy metal sorption
AU - Pal, Dan Bahadur
AU - Singh, Arvind
AU - Jha, Jay Mant
AU - Srivastava, Neha
AU - Hashem, Abeer
AU - Alakeel, Maha Abdullah
AU - Abd_Allah, Elsayed Fathi
AU - Gupta, Vijai Kumar
PY - 2021/11
Y1 - 2021/11
N2 - In this study, low-cost biochar as bio-adsorbents derived from locally accessible delonix regia seed and date seeds were explored for heavy metal environmental cleaning. These prepared biochars were characterized by proximate and elemental analyses, CHNS/O analysis, Fourier-transformed infrared spectroscopy and thermo-gravitational methods. Bio-sorbent's ability to adsorb arsenic ions in synthetic wastewater was studied and optimized at varying solution pH, adsorbent dose, and starting metal concentrations. Experimentation and optimization studies were also carried out with the help of Design-software 6.0.8. The trials were designed by using response-surface methods, which includes three components and stages of Box-Behnken design. Date seeds derived-biochars eliminated 95% of arsenic from synthetic wastewater, whereas Delonix regia seeds removed 93.8%. The kinetics, isotherms and mechanism of As adsorption were also postulated. This study proposes that these seed's biochars might be employed as an effective, low-cost, and environmentally friendly adsorbent to remove heavy metals from the environment.
AB - In this study, low-cost biochar as bio-adsorbents derived from locally accessible delonix regia seed and date seeds were explored for heavy metal environmental cleaning. These prepared biochars were characterized by proximate and elemental analyses, CHNS/O analysis, Fourier-transformed infrared spectroscopy and thermo-gravitational methods. Bio-sorbent's ability to adsorb arsenic ions in synthetic wastewater was studied and optimized at varying solution pH, adsorbent dose, and starting metal concentrations. Experimentation and optimization studies were also carried out with the help of Design-software 6.0.8. The trials were designed by using response-surface methods, which includes three components and stages of Box-Behnken design. Date seeds derived-biochars eliminated 95% of arsenic from synthetic wastewater, whereas Delonix regia seeds removed 93.8%. The kinetics, isotherms and mechanism of As adsorption were also postulated. This study proposes that these seed's biochars might be employed as an effective, low-cost, and environmentally friendly adsorbent to remove heavy metals from the environment.
KW - Adsorption
KW - Arsenic removal
KW - Biochar
KW - Date seeds
KW - Delonix regia seed
UR - http://www.scopus.com/inward/record.url?scp=85111249740&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2021.125606
DO - 10.1016/j.biortech.2021.125606
M3 - Article
C2 - 34325385
AN - SCOPUS:85111249740
SN - 0960-8524
VL - 339
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 125606
ER -