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All Journal Jurnal Penelitian Geosains Jurnal Ilmu Alam dan Lingkungan
Adi Tonggiroh
Departemen Teknik Geologi, Fakultas Teknik Universitas Hasanuddin
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Environmental Science Immunology & microbiology Veterinary

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PENGARUH KOMPOSISI ASH BATUBARA TERHADAP KUALITAS KLINKER PORTLAND CEMENT PADA PT. SEMEN TONASA UNIT III Dahliar, Nurlianti; Widodo, Sri; Tonggiroh, Adi
Jurnal Penelitian Geosains Vol 10, No 2 (2014)
Publisher : Jurnal Penelitian Geosains

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Abstract

Portland cement clinker is a hydraulic material consists of C3S, C2S, C3A and C4AF. For producing clinker, raw meal have been burn in kiln at temperature 1450oC by using the heat combustion from coal. Clinker burning process is the most important process for the cement industry. In the portland cement industry, coal was not only used as a fuel, but it can also affected the composition of clinker. The coal ash will be mixed with raw meal during clinkerization process. Therefore, when the quality of the coal is not in accordance with the raw meal, it will cause crude clinker. The main purpose of study is to determine the influence of coal ash toward clinker quality. It should be known because portland cement clinker quality of PT. Semen Tonasa have to be on standard according to ASTM C-150-1999 and SNI No. 15-6514-2001. The results of paired T-test analysis showed that the composition of the coal ash which affected the quality of clinker after clinkerization process were LSF, SM, C3S, C2S, and C4AF. Based on the result of simple regression analysis, the amount of coal ash composition toward clinker portland cement quality was minor. LSF had the highest influence up to 0.885%, AM range between 0.1-0.3%, C2S range between 0.01-0.07%, C3S range between 0.01-0.02%, and C4AF was 0.019%.Keywords: clinker, coal ash, quality, C3S, C4AF, portland cement
Hubungan Vegetasi Mangrove Terhadap Kelimpahan Makrozoobenthos di Pantai Pangkajene Ambeng Ambeng; Hazairin Zubair; Putu Oka Ngakan; Adi Tonggiroh
Jurnal Ilmu Alam dan Lingkungan Vol. 11 No. 1 (2020): Jurnal Ilmu Alam dan Lingkungan
Publisher : Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (985.29 KB) | DOI: 10.20956/jal.v11i1.9566

Abstract

Mangrove ecosystem is a habitat of various fauna, especially macrozoobenthos. The changing vegetation of the mangrove ecosystem will influence the abundance of macrozoobenthos. This study was conducted in April-August 2019 and aims to analyze the dominance and density relations of mangrove vegetation against the abundance of Macrozoobenthos on the Pagkajene coast. The research location is conducted on three stations, each station is divided into two sampling areas, and on each sampling area is placed six sampling points. Data collection of mangrove vegetation is used with a multilevel plot method and Macrozoobenthos using a plot 50x50 cm. correlation the dominance and density of mangrove vegetation towards the abundance of macrozoobenthos used linear regression analysis. The results of the study gained that the mangrove vegetation dominancy positively affects to the abundance of macrozoobenthos but insignificant. Meanwhile, the density of mangrove vegetation significantly negatively affects to the abundance of macrozoobenthos.
Evaluasi Kesuburan Tanah Pada Lahan Pasca Tambang Nikel Laterit Sulawesi Tenggara Muhardi Mustafa; Adi Maulana; Ulva Ria Irfan; Adi Tonggiroh
Jurnal Ilmu Alam dan Lingkungan Vol. 13 No. 1 (2022): Jurnal Ilmu Alam dan Lingkungan
Publisher : Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/jal.v13i1.20457

Abstract

Pasca penambangan terbuka nikel laterit menyisakan lahan topografi rendah yang kemudian direklamasi dengan cara mengembalikan tanah bagian atas (top soil) sebagai timbunan. Penimbunan ini tidak selamanya berjalan dengan baik bahkan menghasilkan lahan tidak produktif. Dikarenakan pada lahan pasca tambang peran tanah timbunan memerlukan adaptasi fisika kimia terhadap tanah sisa penambangan. Pada lokasi penelitian terdapat sebagian lahan bertekstur lempung berdebu dan vegetasi tak dapat tumbuh dengan baik. Penelitian ini membahas salah satu lahan reklamasi yang masuk sebagai lahan tidak produktif yang bertujuan memberikan informasi karakteristik tanahnya. Hasil penelitian menunjukkan tanah lahan pasca tambang minim akan unsur hara dengan status nilai pH rendah, C-Organik rendah, Nitrogen total rendah, fosfor tersedia rendah, kapasitas tukar ion serta kejenuhan basa mengindikasikan status kesuburan tanah sangat rendah. Hal ini didukung oleh analisis tekstur tanah lempung berdebu lebih dominan daripada fraksi tanah lempung berliat yang berkorelasi dengan porositas dan permiabilitas jelek.
Co-Authors Adi Maulana Ambeng Ambeng Hazairin Zubair Muhardi Mustafa Nurlianti Dahliar, Nurlianti Putu Oka Ngakan Sri Widodo Ulva Ria Irvan