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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Raskin, Lutgarde Hayes, Kim F. Reddy, Raghav Lanzirotti, Antonio Amrose, Susan E. Clancy, Tara M. Snyder, Kathryn V. |
| Description | Country affiliation: United States Author Affiliation: Clancy TM ( Department of Civil & Environmental Engineering, University of Michigan, Ann Arbor, MI 48109, United States.); Snyder KV ( Department of Civil & Environmental Engineering, University of Michigan, Ann Arbor, MI 48109, United States.); Reddy R ( Department of Civil & Environmental Engineering, University of Michigan, Ann Arbor, MI 48109, United States.); Lanzirotti A ( Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 60637, United States.); Amrose SE ( Department of Civil & Environmental Engineering, University of California at Berkeley, Berkeley, CA 94720, United States.); Raskin L ( Department of Civil & Environmental Engineering, University of Michigan, Ann Arbor, MI 48109, United States.); Hayes KF ( Department of Civil & Environmental Engineering, University of Michigan, Ann Arbor, MI 48109, United States. Electronic address: ford@umich.edu.) |
| Abstract | Cement stabilization of arsenic-bearing wastes is recommended to limit arsenic release from wastes following disposal. Such stabilization has been demonstrated to reduce the arsenic concentration in the Toxicity Characteristic Leaching Procedure (TCLP), which regulates landfill disposal of arsenic waste. However, few studies have evaluated leaching from actual wastes under conditions similar to ultimate disposal environments. In this study, land disposal in areas where flooding is likely was simulated to test arsenic release from cement stabilized arsenic-bearing iron oxide wastes. After 406 days submersed in chemically simulated rainwater, <0.4% of total arsenic was leached, which was comparable to the amount leached during the TCLP (<0.3%). Short-term (18 h) modified TCLP tests (pH 3-12) found that cement stabilization lowered arsenic leaching at high pH, but increased leaching at pH<4.2 compared to non-stabilized wastes. Presenting the first characterization of cement stabilized waste using µXRF, these results revealed the majority of arsenic in cement stabilized waste remained associated with iron. This distribution of arsenic differed from previous observations of calcium-arsenic solid phases when arsenic salts were stabilized with cement, illustrating that the initial waste form influences the stabilized form. Overall, cement stabilization is effective for arsenic-bearing wastes when acidic conditions can be avoided. |
| ISSN | 03043894 |
| Volume Number | 300 |
| e-ISSN | 18733336 |
| Journal | Journal of Hazardous Materials |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2015-12-30 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Arsenic Analysis Construction Materials Drinking Water Industrial Waste Iron Water Pollutants, Chemical Water Purification Methods Hydrogen-ion Concentration Sodium Hydroxide Chemistry Solubility Waste Disposal Facilities Journal Article Research Support, Non-u.s. Gov't Research Support, U.s. Gov't, Non-p.h.s. Discipline Environmental Science Discipline Environmental Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Pollution Waste Management and Disposal Health, Toxicology and Mutagenesis Environmental Engineering |
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