Assessment of cement kiln dust (CKD) for stabilization/solidification (S/S) of arsenic contaminated soils
A stabilization/solidification (S/S) process for arsenic (As) contaminated soils was evaluated using cement kiln dust (CKD). Laboratory-prepared slurries, made of either kaolinite or montmorillonite, and field soils spiked with either As3+ or As5+ were prepared and treated with CKD ranging from 10 t...
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2008
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| Online Access: | http://hdl.handle.net/10725/3224 http://dx.doi.org/10.1016/j.jhazmat.2008.02.069 http://www.sciencedirect.com/science/article/pii/S0304389408002811 |
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| _version_ | 1864513460215218176 |
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| author | Moon, Deok Hyun |
| author2 | Wazne, Mahmoud Yoon, In-Ho Grubb, Dennis G. |
| author2_role | author author author |
| author_facet | Moon, Deok Hyun Wazne, Mahmoud Yoon, In-Ho Grubb, Dennis G. |
| author_role | author |
| dc.creator.none.fl_str_mv | Moon, Deok Hyun Wazne, Mahmoud Yoon, In-Ho Grubb, Dennis G. |
| dc.date.none.fl_str_mv | 2008 2016-03-01T08:27:13Z 2016-03-01T08:27:13Z 2016-03-01 |
| dc.identifier.none.fl_str_mv | 0304-3894 http://hdl.handle.net/10725/3224 http://dx.doi.org/10.1016/j.jhazmat.2008.02.069 Moon, D. H., Wazne, M., Yoon, I. H., & Grubb, D. G. (2008). Assessment of cement kiln dust (CKD) for stabilization/solidification (S/S) of arsenic contaminated soils. Journal of hazardous materials, 159(2), 512-518. http://www.sciencedirect.com/science/article/pii/S0304389408002811 |
| dc.language.none.fl_str_mv | en |
| dc.relation.none.fl_str_mv | Journal of Hazardous Materials |
| dc.rights.*.fl_str_mv | info:eu-repo/semantics/openAccess |
| dc.title.none.fl_str_mv | Assessment of cement kiln dust (CKD) for stabilization/solidification (S/S) of arsenic contaminated soils |
| dc.type.none.fl_str_mv | Article info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | A stabilization/solidification (S/S) process for arsenic (As) contaminated soils was evaluated using cement kiln dust (CKD). Laboratory-prepared slurries, made of either kaolinite or montmorillonite, and field soils spiked with either As3+ or As5+ were prepared and treated with CKD ranging from 10 to 25 wt%. Sodium arsenite and sodium arsenate at 0.1 wt% were used to simulate arsenite (As3+) and arsenate (As5+) source contamination in soils, respectively. The effectiveness of treatment was evaluated at curing periods of 1- and 7-days based on the toxicity characteristic leaching procedure (TCLP). As–CKD and As–clay–CKD slurries were also spiked at 10 wt% to evaluate As immobilization mechanism using X-ray powder diffraction (XRPD) analyses. Overall, the TCLP results showed that only the As5+ concentrations in kaolinite amended with 25 wt% CKD after 1 day of curing were less than the TCLP regulatory limit of 5 mg/L. Moreover, at 7 days of curing, all As3+ and As5+ concentrations obtained from kaolinite soils were less than the TCLP criteria. However, none of the CKD-amended montmorillonite samples satisfied the TCLP–As criteria at 7 days. Only field soil samples amended with 20 wt% CKD complied with the TCLP criteria within 1 day of curing, where the source contamination was As5+. XRPD and scanning electron microscopy (SEM)–energy dispersive X-ray spectroscopy (EDX) results showed that Ca–As–O and NaCaAsO4·7.5H2O were the primary phases responsible for As3+ and As5+ immobilization in the soils, respectively. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | LAURepo_e0c292d7b79330d2bb16f287cedd70d9 |
| identifier_str_mv | 0304-3894 Moon, D. H., Wazne, M., Yoon, I. H., & Grubb, D. G. (2008). Assessment of cement kiln dust (CKD) for stabilization/solidification (S/S) of arsenic contaminated soils. Journal of hazardous materials, 159(2), 512-518. |
| language_invalid_str_mv | en |
| network_acronym_str | LAURepo |
| network_name_str | Lebanese American University repository |
| oai_identifier_str | oai:laur.lau.edu.lb:10725/3224 |
| publishDate | 2008 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Assessment of cement kiln dust (CKD) for stabilization/solidification (S/S) of arsenic contaminated soilsMoon, Deok HyunWazne, MahmoudYoon, In-HoGrubb, Dennis G.A stabilization/solidification (S/S) process for arsenic (As) contaminated soils was evaluated using cement kiln dust (CKD). Laboratory-prepared slurries, made of either kaolinite or montmorillonite, and field soils spiked with either As3+ or As5+ were prepared and treated with CKD ranging from 10 to 25 wt%. Sodium arsenite and sodium arsenate at 0.1 wt% were used to simulate arsenite (As3+) and arsenate (As5+) source contamination in soils, respectively. The effectiveness of treatment was evaluated at curing periods of 1- and 7-days based on the toxicity characteristic leaching procedure (TCLP). As–CKD and As–clay–CKD slurries were also spiked at 10 wt% to evaluate As immobilization mechanism using X-ray powder diffraction (XRPD) analyses. Overall, the TCLP results showed that only the As5+ concentrations in kaolinite amended with 25 wt% CKD after 1 day of curing were less than the TCLP regulatory limit of 5 mg/L. Moreover, at 7 days of curing, all As3+ and As5+ concentrations obtained from kaolinite soils were less than the TCLP criteria. However, none of the CKD-amended montmorillonite samples satisfied the TCLP–As criteria at 7 days. Only field soil samples amended with 20 wt% CKD complied with the TCLP criteria within 1 day of curing, where the source contamination was As5+. XRPD and scanning electron microscopy (SEM)–energy dispersive X-ray spectroscopy (EDX) results showed that Ca–As–O and NaCaAsO4·7.5H2O were the primary phases responsible for As3+ and As5+ immobilization in the soils, respectively.PublishedN/A2016-03-01T08:27:13Z2016-03-01T08:27:13Z20082016-03-01Articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article0304-3894http://hdl.handle.net/10725/3224http://dx.doi.org/10.1016/j.jhazmat.2008.02.069Moon, D. H., Wazne, M., Yoon, I. H., & Grubb, D. G. (2008). Assessment of cement kiln dust (CKD) for stabilization/solidification (S/S) of arsenic contaminated soils. Journal of hazardous materials, 159(2), 512-518.http://www.sciencedirect.com/science/article/pii/S0304389408002811enJournal of Hazardous Materialsinfo:eu-repo/semantics/openAccessoai:laur.lau.edu.lb:10725/32242019-02-01T14:11:24Z |
| spellingShingle | Assessment of cement kiln dust (CKD) for stabilization/solidification (S/S) of arsenic contaminated soils Moon, Deok Hyun |
| status_str | publishedVersion |
| title | Assessment of cement kiln dust (CKD) for stabilization/solidification (S/S) of arsenic contaminated soils |
| title_full | Assessment of cement kiln dust (CKD) for stabilization/solidification (S/S) of arsenic contaminated soils |
| title_fullStr | Assessment of cement kiln dust (CKD) for stabilization/solidification (S/S) of arsenic contaminated soils |
| title_full_unstemmed | Assessment of cement kiln dust (CKD) for stabilization/solidification (S/S) of arsenic contaminated soils |
| title_short | Assessment of cement kiln dust (CKD) for stabilization/solidification (S/S) of arsenic contaminated soils |
| title_sort | Assessment of cement kiln dust (CKD) for stabilization/solidification (S/S) of arsenic contaminated soils |
| url | http://hdl.handle.net/10725/3224 http://dx.doi.org/10.1016/j.jhazmat.2008.02.069 http://www.sciencedirect.com/science/article/pii/S0304389408002811 |