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All Journal Indonesian Journal of Chemistry and Environment AKTSAR: Jurnal Akuntansi Syariah
S. Sunarto
PT. BASF Chemical Company
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Environmental Science

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SYNTHESIS OF SILICA GEL FROM GLASS WASTE AND ITS APPLICATION ON SOLID PHASE EXTRACTION OF Pb(II) CATIONS Novisatri, M.B.; Priyambodo, E.; Sunarto, S.
Indonesian Journal of Chemistry and Environment Vol 2, No 1 (2018): June 2018
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijce.v2i1.19576

Abstract

Waste glass is one of inorganic wastes which are significant in Indonesia and has not been handled properly. The high content of SiO2 in the glass waste allowed to be processed into silica gel through sol-gel methods. In this research, waste glass was destructed into micro size particles. After that, it was reacted with a sodium hydroxide solution, thus forming a solution of sodium silicate. Silica gel was obtained by reacting sodium silicate with hydrochloric acid. After a silica gel obtained, silica gel is dried and then characterized using infrared spectrophotometry. Using a glass column, silica gel is used as solid phase on solid phase extraction in terms of preconcentration of Pb(II) cations. Based on this research, preconcentration of Pb(II) cations by solid phase extraction using silica gel from glass waste is an effective method.
Pengaruh Kebijakan Dividen, Kebijakan Hutang dan Good Corporate Governance terhadap Nilai Perusahaan yang Terdaftar di Jakarta Islamic Index Periode 2014-2016 Martini, Tina; Sunarto, S.
AKTSAR: Jurnal Akuntansi Syariah Vol 1, No 2 (2018): December 2018
Publisher : IAIN Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21043/aktsar.v1i2.5529

Abstract

This study aims to empirically examine the effect of dividend policy, debt policy, and good corporate governance on the value of companies listed in the Jakarta Islamic Index for the 2014-2016 period. This type of research is field research, which is conducting research in the field to obtain data or information directly. Data collection techniques using the documentation method. The data analysis technique used is descriptive analysis, multiple regression analysis, partial t test and coefficient of determination. The results showed that the dividend policy variable had a significant positive effect on firm value, the debt policy variable has a significant positive effect on firm value, the variables of good corporate governance do not affect the value of the company.
Co-Authors Novisatri, M.B. Priyambodo, E. Tina Martini, Tina