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EKSTRAKSI LOGAM EMAS/PERAK DARI LARUTAN BIJIH EMAS/PERAK DENGAN SISTEM PENYERAPAN MENGGUNAKAN KARBON AKTIF BATUBARA SUB-BITUMINUS (COALITE) Solihin, Solihin; Guntoro, Dono
ETHOS (Jurnal Penelitian dan Pengabdian) Vol 4 No.1 (Januari 2016) Ethos: Jurnal Penelitian dan Pengabdian (Sains & Teknologi)
Publisher : Universitas Islam Bandung

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Abstract

Salah satu metoda dalam rangka penganekaragaman (diversifikasi) pemanfaatan batubara adalah dijadikan karbon aktif. Hal ini dapat dilakukan karena batubara merupakan suatu material yang unsur utamanya adalah karbon (C) yang sangat diperlukan sebagai bahan baku pembuatan karbon aktif, sebagaimana bahan baku lainnya seperti tulang, biji kopi, tempurung kelapa, serbuk gergaji, kulit kacang dan lain-lain.Penelitian ini, mencoba membuat karbon aktif dengan bahan baku berasal dari batubara sub-bituminus yang telah dikarbonisasi (coalite). Coalite tersebut kemudian diaktifasi pada temperatur 9000C (secara bertahap) pada kondisi tanpa oksigen yang kemudian dialirkan uap air. Batubara hasil aktifasi tersebut kemudian dicoba digunakan sebagai media penyerap logam emas/perak dalam larutan bijih emas sianida (AuCN), yang pada industri pertambangan proses ini sering disebut carbon in leah (CIL). Mengingat pemakaian karbon aktif dalam industri yang sangat beragam dan telah diakui keandalannya, penelitian ini diharapkan memberikan hasil, antara lain sebagai berikut:1. Coalite yang telah dikarbonisasi, diharapkan dapat dijadikan bahan baku pembuatan karbon aktif. 2. Coalite setelah diaktifasi menjadi karbon aktif, diharapkan dapat digunakan sebagai media penyerap logam emas/perak, yang saat ini masih diimport. Dari penelitian ini, diharapkan dapat diketahui besaran optimum karbon aktif (gram), waktu penyerapan (jam) dan ukuran butir karbon aktif batubara (mesh). Untuk mengetahui kandungan emasnya, larutan kaya hasil pelindian dianalisis dengan spektrofotometri serapan atom (SSA). Setelah diketahui adanya penyerapan logam emas/perak terhadap butiran karbon aktif batubara baik sebelum ataupun setelah penyerapan, dilihat dengan scanning electron microscop (SEM).
Kajian Pengaruh Distribusi Ukuran Butir terhadap Kualitas Daya Serap Karbon Aktif yang Dibuat dari Batubara Terkarbonisasi (Coalite) PT. Bukit Asam Tanjung Enim Sumatera Selatan Solihin, Solihin
ETHOS (Jurnal Penelitian dan Pengabdian) Vol 2 No.2 (2004) Ethos: Jurnal Penelitian dan Pengabdian (Sains & Teknologi)
Publisher : Universitas Islam Bandung

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Abstract

an other coal usage diversification that can be considered
PERSENTASE BAGIAN-BAGIAN KARKAS ITIK LOKAL JANTAN YANG RANSUMNYA DITAMBAH LARUTAN DAUN SIRIH (PIPER BETLE LINN) DAN BUNGA KECOMBRANG (ETLINGERA ELATIOR) PERCENTAGES OF CARCASS AND ITS PARTS OF MALE LOCAL DUCKS FED PIPER BETLE LEAF AND TORCH GINGER FLOWER SOLUTION INCLUDED IN COMMERCIAL RATION solihin, solihin; Handarini, Ristika; Dihansih, Elis
Jurnal Peternakan Nusantara Vol 4, No 1 (2018): Jurnal Peternakan Nusantara
Publisher : Universitas Djuanda Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.63 KB) | DOI: 10.30997/jpnu.v4i1.1533

Abstract

This study was aimed at assessing the effects of the inclusion of piper betle leaf and torch ginger flower solution in commercial ration on the percentages of carcass and its parts of male local ducks. The study was conducted from June to August 2016 at Poultry Laboratory of Animal Science Study Program, Faculty of Agriculture, Djuanda University, Bogor. Twenty-four male local ducks aged 2 weeks with average initial body weight of 450 ± 53.04 g were used. A completely randomized design with 4 treatments and 3 replicates was used. Treatments consisted of 100% commercial ration (R0), commercial ration +2.5% piper betle leaf solution + 2.5% torch ginger flower solution (R1), commercial ration+ 5.0% piper betle leaf solution+ 2.5% torch ginger flower solution (R2), and commercial ration + 7.5% piper betle leaf solution + 2.5% torch ginger flower solution (R3). Measurements were taken onlive weight, the percentages of carcass, breast, wings, thigh, and back. Data were subjected to an analysis of variance and a Duncan test. Results showed that the inclusion of piper betle leaf and torch ginger flower solution in the rations of male local ducks gave significant effects (P<0.05) on the percentages of wings and thigh. Treatments were also found to maintain the percentages of breast and back. The inclusion of 2,5% piper betle leaf solution and 2,5% torch ginger flower solution in ration was also found to increase the percentage of thigh of male local ducks. It was recommended that 2,5% piper betle leaf and torch ginger flower solution be included in ration to result in higher percentages of and more economical wings and thigh.
PERSENTASE BAGIAN-BAGIAN KARKAS ITIK LOKAL JANTAN YANG RANSUMNYA DITAMBAH LARUTAN DAUN SIRIH (PIPER BETLE LINN) DAN BUNGA KECOMBRANG (ETLINGERA ELATIOR) Solihin, Solihin; Handarini, Ristika; Dihansih, elis
Jurnal Peternakan Nusantara Vol. 4 No. 1 (2018)
Publisher : Universitas Djuanda Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (757.639 KB) | DOI: 10.30997/jpnu.v4i1.1510

Abstract

This study was aimed at assessing the effects of the inclusion of piper betle leaf and torch ginger flower solution in commercial ration on the percentages of carcass and its parts of male local ducks. The study was conducted from June to August 2016 at Poultry Laboratory of Animal Science Study Program, Faculty of Agriculture, Djuanda University, Bogor. Twenty-four male local ducks aged 2 weeks with average initial body weight of 450 ± 53.04 g were used. A completely randomized design with 4 treatments and 3 replicates was used. Treatments consisted of 100% commercial ration (R0), commercial ration +2.5% piper betle leaf solution + 2.5% torch ginger flower solution (R1), commercial ration+ 5.0% piper betle leaf solution+ 2.5% torch ginger flower solution (R2), and commercial ration + 7.5% piper betle leaf solution + 2.5% torch ginger flower solution (R3). Measurements were taken onlive weight, the percentages of carcass, breast, wings, thigh, and back. Data were subjected to an analysis of variance and a Duncan test. Results showed that the inclusion of piper betle leaf and torch ginger flower solution in the rations of male local ducks gave significant effects (P<0.05) on the percentages of wings and thigh. Treatments were also found to maintain the percentages of breast and back. The inclusion of 2,5% piper betle leaf solution and 2,5% torch ginger flower solution in ration was also found to increase the percentage of thigh of male local ducks. It was recommended that 2,5% piper betle leaf and torch ginger flower solution be included in ration to result in higher percentages of and more economical wings and thigh.Key words: Betle leaf, ginger flower , male local duck, percentage of thigh.
UPAYA STAKEHOLDERS DALAM PEMULIHAN PARIWISATA BALI AKIBAT ERUPSI GUNUNG AGUNG (Sebuah Model Mitigasi Bencana Untuk Pariwisata Berkelanjutan) Solihin, Solihin; Budiarta, I Putu
MEDIA BINA ILMIAH Vol 13, No 4: Nopember 2018
Publisher : BINA PATRIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (387.113 KB) | DOI: 10.33758/mbi.v13i4.182

Abstract

The Government and the people of Bali was constantly working to maintain the sustainability of tourism development sector.However, natural disasters in the form of the eruption of Mount Agung in the year 2017 has been disrupting the flight. As a result the number of visits wisatan who came to Bali to decrease.This paper discusses the efforts of stakeholders in Bali's tourism recovery due to the eruption of Mount Agung in 2017. This scientific papers was a  result of the kualitaif study. Data was obtained through the techniques of observation, study of documents, and in-depth interviews with nine informants, namely tourism officials, observers and the perpetrators of the Bali tours.Data analysis was conducted by applying the theory of stakeholders, the theory of crisis management.Results of the study indicate that Bali's tourism crisis due to the eruption of Mount Agung 2017 has respond by all parties under  Tourism Office of Provincial of Bali. In the face of Bali's tourism crisis year 2017 has done four steps, namely: tactical revocation of travel warning, promotion of tourism, the movement come to Bali, and disaster mitigation strategy.All parties (stakeholders) who are members of a team of disaster mitigation, including tourist services provide the necessary services for tourists, including providing related information of the eruption of Mount Agung in 2017.They also do a quick evacuation against tourists around Mount Agung to a secure area, community and offender tour strives to create a tourist area of Bali as safe and comfortable so that sustainability pariwidata Bali could be maintained
PENGUATAN TEMBAGA MURNI DENGAN TEKNIK EQUAL CHANNEL ANGULAR PRESSING Solihin, Solihin; Mabruri, Efendi; Putrayasa, I Nyoman Gede
Metalurgi Vol 26, No 3 (2011): Metalurgi Vol. 26 No. 3 Desember 2011
Publisher : Pusat Penelitian Metalurgi dan Material - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (411.908 KB) | DOI: 10.14203/metalurgi.v26i3.20

Abstract

Penguatan tembaga murni dengan metode Equal Angular Channel Pressing telah dilakukan terhadap tembaga murni. Hasil pengerjaan ECAP dengan jalur ekstrusi ECAP rute Bc, dimana benda kerja diputar 90 ° setiap pass, menghasilkan pembelahan grain menjadi sub-grain yang memiliki ukuran yang menurun drastis dengan sudut butir yang lebih kecil.  Seiring dengan penurunan besar butir, kekerasan tembaga tersebut meningkat drastis. AbstractThe hardness of high purity copper has been increased through Equal Angular Channel Pressing method. The application of ECAP method with extrution rute Bc , in which the sample was rotated 90° for each pass, result in the generation of sub-grain within the grain. The size of new grain (sub –grain) is drastically smaller than initial grain and also has low angle. With the decreasing of grain size, the hardness drastically increases.
MEKANISME PEMBENTUKAN TITANIUM SILIKON KARBIDA DARI SISTEM Ti-SiC-C[The Mechanisme of Titanium Silicon Carbide in Ti-SiC-C System] Solihin, Solihin
Metalurgi Vol 28, No 3 (2013): Metalurgi Vol.28 No.3 Desember 2013
Publisher : Pusat Penelitian Metalurgi dan Material - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (520.834 KB) | DOI: 10.14203/metalurgi.v28i3.259

Abstract

MEKANISME PEMBENTUKAN TITANIUM SILIKON KARBIDA DARI SISTEM Ti-SiC-C. Titaniumsilikon karbida telah dapat dihasilkan dari sistem Ti-SiC-C melalui teknik plasma discharge sintering (PDS)pada temperatur 1300 °C. Mekanisme pembentukan Ti3SiC2 pada temperatur ini didahului oleh pembentukanfasa intermediate, TiC and Ti5Si3 pada temperatur 700-900 °C. Ti3SiC2 baru terbentuk pada 1300 °C melaluireaksi antar padatan antara fasa intermediate TiC and Ti5Si3. Hasil akhir yang didapat adalah komposit denganTi3SiC2 sebagai matriks dan TiC sebagai fasa terdistribusi. AbstractTitanium silicon carbide can be synthesized from raw material of Ti-SiC-C system through plasma dischargesintering technique (PDS) at 1300 °C. The mechanism of Ti3SiC2 formation is started with the formation ofintermediate phases, TiC and Ti5Si3 at 700-900 °C. Ti3SiC2 can only spontaneously be formed at 1300 °Cthrough solid-state reaction between TiC and Ti5Si as intermediate phases. The final result is a compositeconsisting of matrix phase Ti3SiC2 and distributed phase TiC.
PEMBUATAN PIGMEN TITANIUM DIOKSIDA DENGAN MEDIUM KLORIDA[Making Titanium Dioxide through Chloric Acid Leaching] Solihin, Solihin; Ciptasari, Nurhayati Indah; Arini, Tri
Metalurgi Vol 27, No 2 (2012): Metalurgi Vol. 27 No. 2 Agustus 2012
Publisher : Pusat Penelitian Metalurgi dan Material - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (526.96 KB) | DOI: 10.14203/metalurgi.v27i2.147

Abstract

 PEMBUATAN PIGMEN TITANIUM DIOKSIDA DENGAN MEDIUM KLORIDA. Indonesia memilikicadangan bijih ilmenit yang melimpah. Pengolahan bijih ilmenit melalui jalur hidrometalurgi telah dapatmenghasilkan pigmen titanium dioksida. Hasil penelitian menunjukkan bahwa unsur besi dalam ilmenit dapatdihilangkan menggunakan media klorida sehingga didapat titanium dioksida dengan konsentrasi yang cukuptinggi. Ukuran butiran dan konsentrasi asam mempengaruhi penghilangan unsur besi. Semakin halus butiran dansemakin tinggi konsentrasi asam, semakin banyak unsur besi yang bisa dihilangkan. Pada konsentrasi asamklorida 37 % ukuran butiran -200 mesh dan temperatur 100 °C kadar TiO2 dapat ditingkatkan menjadi 88 %. AbstractTHE MAKING OF TITANIUM DIOXIDE PIGMENT WITH CHLORIDE MEDIUM. Indonesia posses hugeamount of ilmenit deposits. The ilmenite can be processed to produce titanium dioxide throughhydrometallurgical method . The experimental results shows that the iron content in ilmenite can be eliminitedthrough chloric acid leaching, leaving high concentration titanium dioxide as the product. The particle size ofilmenite and chloric acid concentrations affects the elimination rate of iron. The smaller the particle size and thehigher the acid concentrations, the higher amount of iron can be eliminated. At 37 % Chloric acid, -200 meshparticle size and 100 °C, the concentrations of TiO2 can be increased up to 88 %.
PERILAKU PELARUTAN LOGAM NIKEL DAN BESI DARI BIJIH NIKEL KADAR RENDAH SULAWESI TENGGARA Solihin, Solihin; firdiyono, F
Metalurgi Vol 29, No 2 (2014): Metalurgi Vol.29 No.2 Agustus 2014
Publisher : Pusat Penelitian Metalurgi dan Material - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (321.418 KB) | DOI: 10.14203/metalurgi.v29i2.285

Abstract

PERILAKU PELARUTAN LOGAM NIKEL DAN BESI DARI BIJIH NIKEL KADAR RENDAHSULAWESI TENGGARA. Indonesia memiliki cadangan bijih nikel laterit kadar rendah yang besar tetapibelum ada proses pengolahan yang khusus hanya menggunakan bahan baku bijih nikel kadar ini. Kebutuhanlogam nikel yang diperkirakan akan meningkat di masa depan mendorong dilakukannya usaha penelitianpengolahan bijih nikel kadar rendah ini. Salah satu cara pengolahan yang dapat dilakukan adalah pengolahanpada jalur proses hidrometalurgi. Tahap yang penting pada jalur proses ini adalah pelarutan bijih. Dalam tahapanleaching, besi dan nikel diekstrak dari bijihnya melalui pelarutan di dalam media asam. Variabel yang dikajidalam penelitian ini adalah karakteristik bijih, konsentrasi asam dan temperatur proses. Umpan bijih yang lebihkompleks akan menurunkan persen ekstraksi karena memerlukan konsumsi asam yang lebih tinggi. Kenaikankonsentrasi asam meningkatkan persen ekstraksi melalui peningkatan arah reaksi menuju reaksi pelarutan,sementara kenaikan temperatur meningkatkan persen ekstraksi melalui peningkatan koefisien reaksi kimia dandifusi. Pada konsentrasi asam sulfat 30 % dan temperatur proses 90 oC persen ekstraksi besi dan nikel masingmasingadalah sekitar 100 dan 82 %.
Sintesis Kalium Magnesium Posfat Melalui Metoda Mekanokimia untuk Aplikasi sebagai Pupuk Slow Release[MECHANOCHEMICAL SYNTHESIS OF POTASSIUM MAGNESIUM PHOSPHATE FOR APPLICATION AS SLOW RELEASE FERTILIZER MATERIAL[Mechanochemical Synthesis of Potassium Magnesium Phosphate for Application as Slow Release Fertilizer Material] Solihin, Solihin
Metalurgi Vol 28, No 1 (2013): Metalurgi Vol.28 No.1 April 2013
Publisher : Pusat Penelitian Metalurgi dan Material - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (636.529 KB) | DOI: 10.14203/metalurgi.v28i1.242

Abstract

SINTESIS KALIUM MAGNESIUM POSFAT MELALUI METODA MEKANOKIMIA UNTUKAPLIKASI SEBAGAI PUPUK SLOW RELEASE.. Material yang bersifat slow release dapat digunakansebagai pupuk slow release, yakni jenis baru dimana pelepasan elemennya dapat diturunkan. Salah satu pupukslow release adalah potassium magnesium phosphate (KMgPO4). Analisa XRD terhadap material inimenunjukan bahwa kemurnian material ini cukup tinggi, hanya fasa KMgPO4 yang dapat dideteksi dalamsampel material ini. Analysis FTIR menunjukan bahwa teknik mekanokimia cukup berhasil untuk mensintesamaterial in. Analisa DTA menunjukan bahwa material ini stabil dari perubahan temperatur. Analisa morfologimenunjukan bahwa partikel yang tergranulasi memiliki ukuran sekitar 100 mikron. Dibanding dengan pupukbiasa yang nutriennya cepat larut, nutrien yang terlarut dari pupuk jenis slow release dapat diturunkan menjadisekitar 32-33, 22-24, and 0,1-0,7 %, untuk masing-masing potassium, phosphate and magnesium. Hasil ujileaching menunjukan bahwa material ini dapat digolongkan sebagai material yang bersifat slow release. AbstractThe slow release material can be applied as slow release fertilizer, a newly type of fertilizer in which itselemental release can be slowed down. One of slow release fertilizer materials is potassium magnesiumphosphate (KMgPO4). The XRD analysis of this materials shows that the phase purity is high; KMgPO4 isthe only phase can be found in the sample. The FTIR analysis shows that the mechanochemical synthesis cansuccessfully be used to produce KMgPO4. The DTA analysis shows that this material is quite stable totemperature change. The morphology analysis shows that granulated particle size material is around 100microns. Compared to the conventional fertilizer, the element released from this material can be decreaseddown to about 32-33, 22-24, and 0,1-0,7 %, for potassium, phosphate and magnesium, respectively. Theresult of leaching experiments has proven that this material can be classified as slow release materials.