The kinetic trend for Cu extraction from contaminated soil through ethylenediamine-N,N′-disuccinic acid (EDDS)-enhanced soil washing is investigated. Long-term tests are conducted over 96 h at five different values of EDDS-Cu (M) molar ratio (mol/mol) and five different values of liquid-to-soil (L/S) ratio (v/w). The overall Cu extraction efficiency at different M ratios ranges from ≃47 to ≃60 % as the ratio increases from stoichiometric values to EDDS excess (M=50). An increase in the L/S ratio generally leads to the Cu extraction efficiency decrease, from ≃60 % (L/S=5) to ≃49 % (L/S=45). The highest decrease of Cu extraction yield is observed while increasing the L/S ratio from 5 to 15, with negligible differences occurring as the L/S ratio increases further. The collected data show a two-step kinetic tendency during the extraction process, first characterized by a fast extraction kinetic which is followed by a slow extraction step. Two sets of experimental data are used for calibration and validation of a two-step mathematical model used to simulate Cu mobilization efficiency as a function of treatment time and M ratio. The proposed model is a useful tool for Cu extraction efficiency prediction and can be applied to improve the decision-making process regarding the EDDS-enhanced soil washing approach.

Calibration and Validation of a Two-Step Kinetic Mathematical Model for Predicting Cu Extraction Efficiency in an EDDS-Enhanced Soil Washing / Ferraro, A.; Fabbricino, M.; Van Hullebusch, E. D.; Esposito, G.. - In: WATER AIR AND SOIL POLLUTION. - ISSN 0049-6979. - 227:(2016). [10.1007/s11270-016-2764-8]

Calibration and Validation of a Two-Step Kinetic Mathematical Model for Predicting Cu Extraction Efficiency in an EDDS-Enhanced Soil Washing

Ferraro A.
;
2016-01-01

Abstract

The kinetic trend for Cu extraction from contaminated soil through ethylenediamine-N,N′-disuccinic acid (EDDS)-enhanced soil washing is investigated. Long-term tests are conducted over 96 h at five different values of EDDS-Cu (M) molar ratio (mol/mol) and five different values of liquid-to-soil (L/S) ratio (v/w). The overall Cu extraction efficiency at different M ratios ranges from ≃47 to ≃60 % as the ratio increases from stoichiometric values to EDDS excess (M=50). An increase in the L/S ratio generally leads to the Cu extraction efficiency decrease, from ≃60 % (L/S=5) to ≃49 % (L/S=45). The highest decrease of Cu extraction yield is observed while increasing the L/S ratio from 5 to 15, with negligible differences occurring as the L/S ratio increases further. The collected data show a two-step kinetic tendency during the extraction process, first characterized by a fast extraction kinetic which is followed by a slow extraction step. Two sets of experimental data are used for calibration and validation of a two-step mathematical model used to simulate Cu mobilization efficiency as a function of treatment time and M ratio. The proposed model is a useful tool for Cu extraction efficiency prediction and can be applied to improve the decision-making process regarding the EDDS-enhanced soil washing approach.
2016
Calibration and Validation of a Two-Step Kinetic Mathematical Model for Predicting Cu Extraction Efficiency in an EDDS-Enhanced Soil Washing / Ferraro, A.; Fabbricino, M.; Van Hullebusch, E. D.; Esposito, G.. - In: WATER AIR AND SOIL POLLUTION. - ISSN 0049-6979. - 227:(2016). [10.1007/s11270-016-2764-8]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/237528
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