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Rofienda Rofienda
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Penelitian Pembuatan Formulasi Insektisida Dari Tanaman Nimba Sri Pudji Rahayu; Rofienda Rofienda; Emmy Ratnawati
Jurnal Kimia dan Kemasan BULLETIN PENELITIAN VOL. XVIII NO. 2 AGUSTUS 1996
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v0i0.5071

Abstract

Neem tree (Azadirachta indica) was found contain azadirachtion that can be used as an insecticide. Extraction of azadirachtin has been conducted in BEIK laboratory with neem seed collected from Madura and Ngawi, by using n-hexane, methanol petroleum ether and ethyl acetate as solvents. The experiment showed that n-hexane gave the best result in the extraction of neem seed from Madura, that was 20,36 °10. The neem extract then used to made Emulsifiable Concentrate (EC) formulation of insecticide. As a control, it was used neem oil from India.From the physico - chemical testing of formulation, is found that EC formulation of neem extract arc not give good result yet, compared then EC formulation that made from Indian neem oil.
Energi Bersih Bensin Tanpa Timbal (Pb) Sumingkrat Sumingkrat; Rofienda Rofienda
Jurnal Kimia dan Kemasan BULLETIN PENELITIAN VOL. 24 NO. 1 JUNI 2002
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v0i0.4748

Abstract

Sep[erti telah diketahui bensin bertimbal merupakan penghasil bahan berbahaya SPM dilingkungan pada sektor transportasi, dimana dilain pihak dapat menimbulkan banyak problem kesehatan seperti menurunnya IQ, kanker, cognitive effect dan sebagainya. Ternyata bensin tanpa timbal lebih efisien dalam penggunaan dan memelihara kualitas lingkungan.
Penyerapan Polutan Gas Co Dari Emisi Gas Cerobong Dengan Penyerap NaOH Rofienda Rofienda; Siti Noer Tri H
Jurnal Kimia dan Kemasan BULLETIN PENELITIAN VOL. 23 NO. 2 DESEMBER 2001
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v0i0.4787

Abstract

CO gas from exhaust gas emzsszon industry in large quantities about I 000 ppm is dangerous for human health, if it inhaled through respiratory organ, nerve system and blood. Research has been done for catch the emission gas from exhaust gas use sodium hidroxyde solution as absorber and is sprayed by designed equipment. The result shown that percentage of CO gas absorbed by NaOH solution is direct indicate to concentration of absorber solution. NaOH solution I 000 mg/I can absorb CO gas up to 85,7%.
Penanganan Limbah Padat Polimer Dengan Cara Pembakaran Pada Combustion System Di BBIK Rofienda Rofienda; Siti Noer Tri Hidayati
Jurnal Kimia dan Kemasan BULLETIN PENELITIAN VOL. XXI NO. 2 AGUSTUS 1999
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v0i0.5166

Abstract

The combustion of wastes as a by product of polymer industry has been conducted in various ways such as natural combustion, stiring combustion, combustion with air injection or the combination of (he aboves. It was found that the process of combustion with air injection at furnace temperature > 260 °C gives the best result, i.e. it consumes less fuel and the smallest amount of remaining solids.
Prototip Incinerator Untuk Pembakaran Limbah Padat Industri Rofienda Rofienda; Siti Noertri Hidayati; Wuryanto Wuryanto; Toton M. Supraptono
Jurnal Kimia dan Kemasan Bulletin Penelitian Vol. 25 No. 3 Desember 2003
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v0i0.3275

Abstract

Prototip Incinerator Untuk Pembakaran Limbah Padat Industri
Proses Aktivasi Ulang Bentonit Bekas Proses Pemucatan Minyak Kelapa Sawit Siti Agustina; Emmy Ratnawati; siti Nurtri H; Rofienda Rofienda; Tri Widianto
Jurnal Kimia dan Kemasan BULLETIN PENELITIAN VOL. 26 NO. 2 DESEMBER 2004
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v0i0.4711

Abstract

Pada saat ini limbah adsorben bekas pada proses pemucatan minyak kelapa sawit yang berupa bentonit bekas belum dimanfaatkan secara optimal oleh industri. Penelitian ini bertujuan untuk meminimisasi limbah tersebut dengan cara mengaktivasi ulang, sehingga dapat digunakan kembali untuk proses pemucatan minyak kelapa sawit. Proses aktivasi bentonit bekas dilakukan dengan 2 cara, yaitu pertama aktivasi secara pemanasan dan kedua aktivasi secara pengasaman lalu pemanasan. Variabel penelitian adalah suhu pemanasan, jenis asam dan konsentrasi asam. Berdasarkan data hasil penelitian menunjukkan bahwa proses aktivasi adsorben bekas yangterbaik adalah proses aktivasi dengan cara pengasaman lalu pemanasan dengan menggunakan asam sulfat 4 % serta suhu pemanasan 400° C selama 1 jam. Efektifitas penurunan warna pada proses pemucatan minyak kelapa sawit dengan menggunakan bentonit bekas hasil aktivasi ulang adalah 90 %.
Hidrocarbon Yang Mudah Menguap, Manfaat dan Bahayanya Rofienda Rofienda
Jurnal Kimia dan Kemasan BULLETIN PENELITIAN VOL. 25 NO. 2 AGUSTUS 2003
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v0i0.4695

Abstract

Senyawa-senyawa hidrokarbon yang mudah menguap (VOC) banyak digunakan sebagai bahan bakar cair, pelarut, dapat juga sebagai pencuci di bengkel ataupun pabrik, karena sifatnya yang mudah menguap keudara. Namun emisi yang ditimbulkannya dapat menyebabkan smog fotokimia,yang dapat menyebabkan pencemaran udara dan gangguan kesehatan manusia. Pengontrolan emisi dapat dilakukan dengan tehnologi penanggulangan polutan gas-gas, seperti absorpsi, adsorpsi kondensasi dan insinerasi, mengganti dengan bahan non voe atau dengan mencegah kebocoran dari konteiner
Alkil Benzen Sulfonat (ABS) Untuk Formulasi Pestisida Bentuk Pekatan Teremulsi (EC) Hendartini Hendartini; Rofienda Rofienda
Jurnal Kimia dan Kemasan BULLETIN PENELITIAN VOL. XV NO. 46 Maret 1991
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v0i0.5042

Abstract

Mutu formulasi pekatan teremulsi (Emulsifiable Concentrate, EC) ditentukan oleh sifat-sifat fisika-kimianya, antara lain kadar bahan aktif, kestabilan emul-si, pH dan busa stabil. Dari sifat-sifat fisika tersebut yang terpenting adalah kestabilan emulsi. Emulsi yang stabil dapat dicapai dengan pemakaian bahan pengemulsi yang tepat.
Penentuan HLB Butuh Suatu Bahan Dengan Sistem HLB Rofienda Rofienda
Jurnal Kimia dan Kemasan BULLETIN PENELITIAN NO.43 TRIWULAN I 1989/1990
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v0i0.4979

Abstract

HLB-system is a method to determine the required HLB of a substance by using aset of standard emulsifiers with certain HLB values as and aid.Experiment has been carried out to determine the required HLB in emulsion making of BPMC in Xylol.The result indicates that the stabiiity of this emulsion has been achieved in sixty minutes at the HLB value of 12.
Pengurangan Kadar Racun Pada Pembuangan Pestisida Rusak Rofienda Rofienda; sri pudji Rahayu
Jurnal Kimia dan Kemasan BULLETIN PENELITIAN VOL. XVIII NO. 3 DESEMBER 1996
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24817/jkk.v0i0.5076

Abstract

Unused pesticide either damage pesticide from long term storage or unppropiate storage, it will be a big problem especially when it be disposed, because it will destroy the environment. For that reason, research on detoxification of damage pesticides with active ingredient monocrotophos, chlorpyriphos and profenophos using 10 % and 25 % concentration of sodium hidroxide (NaOH) and 10, 20 and 30 % concentration of lime were conducted.The result of the experiment showed that NaOH with 25 % concentration can decrease the concentration of monocrotophos, chlorpyripos and proferophos 77,5 %, 53,3 % and 91,8 % respectively. While 30 % concentration of lime decreased the concentration of monocrotophos, chlorpyripos and profenopos as 84,2 %; 46 % and 80,8 % respectively. Using of 25 % NaOH gave a better result compared then using 30 % of lime. However, from the economical point of view, lime was better.
Co-Authors Emmy Ratnawati Hendartini Hendartini Moh T S Robiatun Robiatun Siti Agustina Siti Noer Tri H Siti Noer Tri Hidayati Siti Noertri Hidayati siti Nurtri H Sri Pudji Rahayu Sumingkrat Sumingkrat Toton M. Supraptono Wuryanto Wuryanto