Analysis of the breakthrough phenomena during heavy metal elution from a column packed with municipal waste incineration ash

• Autorzy: Zhang W. , Yang Y. , Suganuma H. , Kato S. , Suzuki S. , Kojima T.

Identyfikatory

DOI

10.5277/epe180305

• Języki publikacji: EN

Abstrakty

EN

At some point during acid leaching column tests of heavy metals from municipal waste incineration ash, sudden and rapid elution of harmful elements was observed which was called the breakthrough (BT) phenomena. The mechanism was elucidated from the results of measurement of elemental and particle size distribution in the column and batch leaching tests as follows. At the first stage of experimental runs, CaCO₃ was dissolved in acidic solution and pH profile along the bed is formed. Some of the minor elements of Zn and Al dissolved by acid at the upper part of the column are precipitated at bottom of the column, leading to the reduction of flow rate of the leachate solution. After leachate pH becomes low by the termination of dissolution of Ca, these deposits are dissolved and thus, the flow rate increases. Most of the trace elements behave as such, which causes the increase of harmful element concentrations in the eluate. Some drastic concentration increase of harmful elements in leachate may occur even after the long period of pseudo stable dissolution behavior in the land-fill site.

Słowa kluczowe

EN

calcium compounds; dissolution; heavy metals; leaching; particle size

PL

związki wapnia; rozpuszczanie; metale ciężkie; ługowanie; wielkość cząstek

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2018
• Tom: Vol. 44, nr 3
• Strony: 63--78
• Opis fizyczny: Bibliogr. 9 poz., tab., rys.

Twórcy

autor

Zhang W.

• Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University of China, 2519 Jiefang Street, Changchun, Jilin, China

autor

Yang Y.

• Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University of China, 2519 Jiefang Street, Changchun, Jilin, China

autor

Suganuma H.

• Department of Materials and Life Sciences, Seikei University, 3-3-1 Kichijoji Kitamachi Musashino-shi, Tokyo 180-8633, Japan

autor

Kato S.

• Department of Materials and Life Sciences, Seikei University, 3-3-1 Kichijoji Kitamachi Musashino-shi, Tokyo 180-8633, Japan

autor

Suzuki S.

• Department of Materials and Life Sciences, Seikei University, 3-3-1 Kichijoji Kitamachi Musashino-shi, Tokyo 180-8633, Japan

autor

Kojima T.

• Department of Materials and Life Sciences, Seikei University, 3-3-1 Kichijoji Kitamachi Musashino-shi, Tokyo 180-8633, Japan

Bibliografia

• [1] ISHIKAWA S., Recent Plant Technology of Waste Treatment and Ash Melting, Nippou, Tokyo 1997, 181 (in Japanese).
• [2] TRAVARA I., LIDELÖWA S., ANDREASA L., THAMB G., LAGERKVISTA A., Assessing the environmental impact of ashes used in a landfill cover construction, Waste Manage., 2009, 29, 1336.
• [3] WEHRER M., TOTSCHEA K.U., Effective rates of heavy metal release from alkaline wastes quantified by column outflow experiments and inverse simulations, J. Contam. Hydrol., 2008,101, 53.
• [4] HUANGA S.J., CHANGA C.Y., MUIA D.T., CHANGB F.C., LEE M.Y., WANG C.F., Sequential extraction for evaluating the leaching behavior of selected elements in municipal solid waste incineration fly ash, J. Hazard. Mater., 2007, 149, 180.
• [5] ZHANG W.Q., KATO S., KOJIMA T., Influence of dissolution and deposition of main and minor elements on elution behavior from municipal waste incineration fly ash, Kagakukogaku Ronbunshu, 2011, 37, 64 (in Japanese).
• [6] ZHANG W.Q., ISHIHARA M., KOJIMA T., Emission of dioxins and other harmful gases at mixing incineration test with plastic refuse using existing facilities. Case study of Musashino City, Kagaku Kogaku Ronbunshu, 2010, 36, 336 (in Japanese).
• [7] ZHANG W.Q., ZHANG F., SUGANUMA H., KATO S., KOJIMA T., Comparative study on leaching property of harmful trace heavy metal elements from Japanese and Chinese municipal waste incineration fly ashes, Kagakukogaku Ronbunshu, 2013, 39, 391 (in Japanese).
• [8] Chemistry Handbook, Vol. II, 5th Ed., Maruzen, Tokyo 2004, 149 (in Japanese).
• [9] MCCABE W.L., SMITH J.C., HARRIOT P., Unit Operations of Chemical Engineering, 7th, McGraw-Hill, New York 2005.