Preliminary Study on Additives for Controlling As, Se, B, and F Leaching from Coal Fly Ash

Hanum, Farrah Fadhillah and Desfitri, Erda Rahmilaila and Hayakawa, Yukio and Kambara, Shinji Preliminary Study on Additives for Controlling As, Se, B, and F Leaching from Coal Fly Ash. MDPI Publishing.

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The application of paper sludge ash as an additive in controlling the leaching of trace
elements has been satisfactorily effective to date. Previous studies have found that paper sludge ash
has a promising effect in controlling the leaching of arsenic, selenium and boron. The content of
calcium oxide in paper sludge ash is believed to be one of the important factors in decreasing the
concentration of trace elements in leachate. Therefore, this study aimed to verify the effect of paper
sludge ash in the leaching process and to propose an effective and applicable suppressing material
that can control the leaching of As, Se, B and F simultaneously. In light of this aim, Ca(OH)2, PS ash
8 and blast furnace cement (BF cement) were tested as single and mixed additives in two different
coal fly ashes (FA C and FA H). The results indicate that the application of a mixture of additives is
necessary to control the leaching of trace elements. A mixture of PS ash 8, Ca(OH)2 and blast furnace
cement (BF cement) was proposed to be an applicable and suitable additive that could suppress
arsenic, selenium, boron, and fluorine leaching simultaneously.
Keywords: additives; calcium; paper sludge ash; coal fly ash

Item Type: Other
Subjects: Q Science > Q Science (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TD Environmental technology. Sanitary engineering
Divisi / Prodi: Faculty of Industrial Technology (Fakultas Teknologi Industri) > S1-Chemical Engineering (S1-Teknik Kimia)
Depositing User: Dr. Eng. Farrah Fadhillah Hanum
Date Deposited: 30 Jul 2020 08:16
Last Modified: 30 Jul 2020 08:16

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