Utilization of Marine-Dredged Sediment and Calcium Sulfoaluminate Cement for Preparing Non-Sintered Ceramsites: Properties and Microstructure DOI Creative Commons
Jiuye Zhao, Zijian Wang, Mengying Xiao

et al.

Journal of Marine Science and Engineering, Journal Year: 2025, Volume and Issue: 13(5), P. 891 - 891

Published: April 30, 2025

The resource utilization of marine-dredged sediment is considered a sustainable approach to its disposal. This paper investigates the preparation non-sintered ceramsites from sediments and CSA cement via cold-bonded pelletization. study examines effects various conditions on engineering properties, phase compositions microstructures ceramsites. results indicate that significantly influence particle size distribution early-strength development prepared remarkable, with PCS achieving approximately 60% 80% 28-day strength within 3 days 7 days, respectively—a marked contrast OPC. Response surface methodology analysis reveals significant interaction between disc rotation angle, rotational speed, duration open-ended porosity exhibits greater sensitivity changes in parameters compared closed-ended total porosity. have negligible impact hydration process For both ellipsoidal plate-like soil particles, ettringite AH3 provide effective pore-filling binding These findings imply low-carbon through offers nature-based solution for management coastal systems.

Language: Английский

Adsorption of Heavy Metal Pb(II) in Dredged Sediment Using Different Biochar Materials DOI Open Access
Ying Su,

Qianyi Liao,

Siqing Xia

et al.

Processes, Journal Year: 2025, Volume and Issue: 13(4), P. 957 - 957

Published: March 24, 2025

China generates a significant amount of dredged sediment annually, much which is contaminated with heavy metals. This study investigates the adsorption Pb(II) from water and using different biochar materials, including BC HC. The results show that maximum by BC-350-2h HC-350-1:2-0.5h was 9.90 mg/g 9.95 mg/g, respectively, efficiencies 99.0% 99.5% for 50 mg/L solution at dosing concentration 5 g/L, under 10 min adsorption. effectively adsorbed sediment, no detectable in liquid fraction after 20 days. However, when time increased, small portion Pb migrated into an unstable form, probably due to its binding dissolved organic carbon (DOC), dissolves out biochar. Microbial activity may also contribute degradation DOC small-molecule (SDOC), thereby reducing strength DOC, adsorbs Pb(II). highlights importance considering effects long-term stability used treat sediment.

Language: Английский

Citations

0
Utilization of Marine-Dredged Sediment and Calcium Sulfoaluminate Cement for Preparing Non-Sintered Ceramsites: Properties and Microstructure DOI Creative Commons
Jiuye Zhao, Zijian Wang, Mengying Xiao

et al.

Journal of Marine Science and Engineering, Journal Year: 2025, Volume and Issue: 13(5), P. 891 - 891

Published: April 30, 2025

The resource utilization of marine-dredged sediment is considered a sustainable approach to its disposal. This paper investigates the preparation non-sintered ceramsites from sediments and CSA cement via cold-bonded pelletization. study examines effects various conditions on engineering properties, phase compositions microstructures ceramsites. results indicate that significantly influence particle size distribution early-strength development prepared remarkable, with PCS achieving approximately 60% 80% 28-day strength within 3 days 7 days, respectively—a marked contrast OPC. Response surface methodology analysis reveals significant interaction between disc rotation angle, rotational speed, duration open-ended porosity exhibits greater sensitivity changes in parameters compared closed-ended total porosity. have negligible impact hydration process For both ellipsoidal plate-like soil particles, ettringite AH3 provide effective pore-filling binding These findings imply low-carbon through offers nature-based solution for management coastal systems.

Language: Английский

Citations

0