Solidification/stabilization of lead-contaminated soil using alkali-activated volcanic ash DOI Creative Commons

M. Molaei,

Hania Miraki,

Mohsen Morovati

et al.

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(26), P. 38465 - 38484

Published: May 28, 2024

Abstract The bioaccumulation of lead in soil poses a significant human health risk. solidification/stabilization (S/S) technique, employing binders like Portland cement or lime, is common method for remediating lead-contaminated soil. However, production has adverse environmental impacts, prompting the exploration eco-friendly alternatives alkali-activated materials (AAMs). This study assesses AAM efficacy S/S effects several factors, including varying amounts volcanic ash (VA), concentration, curing temperatures, and times are investigated. Unconfined compressive strength (UCS), toxicity characteristic leaching procedure test (TCLP), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), field emission scanning electron microscope-energy-dispersive spectroscopy-mapping analyses (FESEM/EDS/mapping) used to specimens. findings indicated substantial increase UCS treated with 15% VA (under oven (OC) conditions), 10% ambient (AC) conditions) exhibited remarkable increases up 600% 458%, respectively. Moreover, Pb 2+ ions from samples contaminated 10,000 mg/kg OC 2500 AC experienced reductions 87% (from 135.14 13.36 ppm) 91% 26.32 2.21 ppm), process these operated through three primary mechanisms chemical bonding, physical encapsulation, formation insoluble silicate. N-A-S–H hydroxy sodalite structures played vital role facilitating mechanisms. Therefore, demonstrated excellent performance remediation Graphical

Language: Английский

Green Solutions to Valorize Marine Dredged Sediments as an Anthropogenic Geomaterial DOI
Mrunal S Bokade, Devendra Narain Singh

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116219 - 116219

Published: March 1, 2025

Language: Английский

Citations

0
Solidification/stabilization of lead-contaminated soil using alkali-activated volcanic ash DOI Creative Commons

M. Molaei,

Hania Miraki,

Mohsen Morovati

et al.

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(26), P. 38465 - 38484

Published: May 28, 2024

Abstract The bioaccumulation of lead in soil poses a significant human health risk. solidification/stabilization (S/S) technique, employing binders like Portland cement or lime, is common method for remediating lead-contaminated soil. However, production has adverse environmental impacts, prompting the exploration eco-friendly alternatives alkali-activated materials (AAMs). This study assesses AAM efficacy S/S effects several factors, including varying amounts volcanic ash (VA), concentration, curing temperatures, and times are investigated. Unconfined compressive strength (UCS), toxicity characteristic leaching procedure test (TCLP), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), field emission scanning electron microscope-energy-dispersive spectroscopy-mapping analyses (FESEM/EDS/mapping) used to specimens. findings indicated substantial increase UCS treated with 15% VA (under oven (OC) conditions), 10% ambient (AC) conditions) exhibited remarkable increases up 600% 458%, respectively. Moreover, Pb 2+ ions from samples contaminated 10,000 mg/kg OC 2500 AC experienced reductions 87% (from 135.14 13.36 ppm) 91% 26.32 2.21 ppm), process these operated through three primary mechanisms chemical bonding, physical encapsulation, formation insoluble silicate. N-A-S–H hydroxy sodalite structures played vital role facilitating mechanisms. Therefore, demonstrated excellent performance remediation Graphical

Language: Английский

Citations

3