Title:

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

Group publication title:

Environment Protection Engineering

Creator:

Zhang, Wenqing ; Yang, Yuesuo ; Suganuma, Hideki ; Kato, Shigeru ; Suzuki, Seiichi ; Kojima, Toshinori

Contributor:

Majewska-Nowak, Katarzyna Maria. Redakcja

Subject and Keywords:

ochrona środowiska ; inżynieria środowiska ; czasopisma

Description:

Environment Protection Engineering. Vol. 44, 2018, nr 3, s. 63-78

Abstrakt:

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.

Publisher:

Oficyna Wydawnicza Politechniki Wrocławskiej

Place of publication:

Wrocław

Date:

2018

Resource Type:

artykuł

Resource Identifier:

doi:10.5277/epe180305

Source:

<sygn. PWr A4232I> ; click here to follow the link ; click here to follow the link

Language:

eng

Relation:

Environment Protection Engineering ; Environment Protection Engineering. Vol. 44, 2018 ; Environment Protection Engineering. Vol. 44, 2018, nr 3

Rights:

Wszystkie prawa zastrzeżone (Copyright)

Access Rights:

Dla wszystkich w zakresie dozwolonego użytku

Location:

Politechnika Wrocławska