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All Journal Reaktor International Journal of Renewable Energy Development TEKNIK Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan DIPOIPTEKS: Jurnal Ilmiah Mahasiswa Undip Bulletin of Chemical Reaction Engineering & Catalysis Seminar Nasional Teknik Kimia Kejuangan Prosiding Semnastek Jurnal Penelitian Pertanian Terapan Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Jurnal Civil Engineering Study International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis
Titik Istirokhatun
Department Of Environmental Engineering, Faculty Of Engineering, Diponegoro University, Jl. Prof. Soedarto, Kampus UNDIP Tembalang, Semarang 50275
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Pengaruh Jumlah Kendaraan dan Faktor Meteorologis (Suhu, Kecepatan Angin) Terhadap Peningkatan Konsentrasi Gas Pencemar CO, NO2, dan SO2 Pada Persimpangan Jalan Kota Semarang (Studi Kasus Jalan Karangrejo Raya, Sukun Raya, dan Ngesrep Timur V) Noviani R., Elaeis; Ramayana L. Tobing, Kiki; Tetriana A., Ita; Istirokhatun, Titik
DIPOIPTEKS: Jurnal Ilmiah Mahasiswa Undip DIPOIPTEKS Vol. 1, No. 1 (2013)
Publisher : DIPOIPTEKS: Jurnal Ilmiah Mahasiswa Undip

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (528.202 KB)

Abstract

Jalan Ngesrep Timur V, Jalan Sukun Raya dan Jalan Karangrejo Raya Kota Semarang adalah jalan yang terletak di persimpangan yang terdapat di kecamatan Banyumanik yang merupakan jalan kolektor yaitu jalan yang melayani angkutan pengumpulan atau pembagian dengan ciri-ciri perjalanan sedang, kecepatan rata-rata yang sedang dan jumlah jalan masuk yang dibatasi. Jalan Karangrejo Raya dan jalan Sukun Raya dialokasikan sebagai pusat aktivitas dan aglomerasi penduduk seiring dengan bermunculnya fasilitas perdagangan dan perumahan baru, sedangkan jalan Ngesrep Timur V dialokasikan sebagai fasilitas pendidikan karena adanya 3 perguruan tinggi yang cukup ternama di kawasan ini yaitu Universitas Diponegoro, Politeknik Negeri Semarang dan Politeknik Kesehatan Semarang. Semakin hari jumlah kendaraan yang melintasi Jalan Ngesrep Timur V, Jalan Sukun Raya dan Jalan Karangrejo Raya semakin meningkat, yang dapat mengakibatkan terjadinya pencemaran udara akibat kendaraan bermotor yang lalu lalang di jalan tersebut terutama gas pencemar CO, SO2, dan NO2 yang berasal dari aktivitas kendaraan bermotor. Hal ini menjadi latar belakang untuk diadakannya penelitian guna mengetahui besar konsentrasi gas pencemar di ketiga jalan tersebut.Metode penelitian yang digunakan adalah pengambilan sampel secara langsung di lokasi pada saat jam padat kendaraan yaitu pada pagi hari (07.00-08.00), siang hari (13.00-14.00), dan sore hari (16.00-17.00) selama 12 hari masing-masing 3 hari berturut-turut di Jalan Karangrejo Raya, Jalan Sukun Raya, dan Jalan Ngesrep Timur V dan 3 hari sisanya membandingkan kedua jalan, dimulai dari Jalan Karangrejo Raya dan Sukun Raya, Jalan Karangrejo Raya dan Ngesrep Timur V, dan Jalan Sukun Raya dan Ngesrep Timur V. Berdasarkan hasil penelitian yang telah dianalisa, konsentrasi CO di jalan Karangrejo Raya berkisar antara 8-14ppm, konsentrasi CO di jalan Sukun Raya berkisar 8-17ppm, dan konsentrasi CO di jalan Ngesrep Timur V 8-19ppm. Hal ini menunjukkan konsentrasi CO di ketiga jalan berada di atas baku mutu. Sedangkan konsentrasi NO2 di Jalan Karangrejo Raya berkisar antara 0,7-4,2μg/Nm3, konsentrasi NO2 di Jalan Sukun Raya berkisar antara 1,0-4,1μg/Nm3, dan konsentrasi NO2 di Jalan Ngesrep Timur V berkisar antara 0,2-1,7μg/Nm3. Hal ini menunjukkan bahwa konsentrasi NO2 di ketiga jalan berada jauh dibawah baku mutu. Hasil statistik menunjukkan bahwa jumlah kendaraan dan faktor meteorologis seperti, suhu, kecepatan angin mempengaruhi konsentrasi CO, NO2. Selanjutnya untuk konsentrasi SO2 yang berada di Jalan Karangrejo Raya berkisar 14-21,1 μg/Nm3, untuk Jalan Sukun Raya sebesar 14-18,8 μg/Nm3 dan konsentrasi SO 2 yang terukur di Jalan Ngesrep Timur V yaitu 0,4-6,1 μg/Nm3.
OPTIMALISASI SISTEM PENGELOLAAN SAMPAH DI LINGKUNGAN KAMPUS UNIVERSITAS DIPONEGORO: UPAYA MENUJU UNDIP ECO-CAMPUS Wiharyanto, Oktiawan; Titik, Istirokhatun; Nur, Fajar S. S
TEKNIK Volume 33, Nomor 2, Tahun 2012
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (68.75 KB) | DOI: 10.14710/teknik.v33i2.4389

Abstract

Diponegoro University as a leading institution of higher education in Central Java is expected to be a pioneerand an example in terms of waste management. But in fact now has Undip not have an adequate system of wastemanagement. Current conditions almost all existing studies program has been concentrated in the campus areaTembalang still treats conventional waste by dumping it in the trash is mixed with and without prior sortingwhich will eventually increase the weight of the existing TPS and TPA. This makes the system of wastemanagement in the UNDIP really need to be evaluated and reviewed. This study dimaksudakan to optimizewaste management system with the principles of the 3R (reuse, reduce, recycle) in order to minimize the wasteproblem. Besides this optimization also as an effort to realize the vision of the university Undip asenvironmentally friendly (eco-campus) and a role model for waste management agencies and other institutions
INVESTIGASI PENGARUH KONDISI LALU LINTAS DAN ASPEK METEOROLOGI TERHADAP KONSENTRASI PENCEMAR SO2 DI KOTA SEMARANG Istirokhatun, Titik; Agustini, Ita Tetriana; Sudarno, Sudarno
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 13, No 1 (2016): Maret 2016
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (893.083 KB) | DOI: 10.14710/presipitasi.v13i1.21-27

Abstract

The  presence  of  air  pollution  in  ambient  air  is  closely  related  to  the incidence  of  adverse reactions affecting human health. One of harmful pollutants and potentially major cause health problems is sulfur dioxide (SO 2 ). The number of vehicles that are passing and queuing on the crossroads  because  of  traffic light can  affect  the  concentration  of  SO 2 .  Besides,  in  these locations  there  are a lot of road users  which  are  potentially  exposed  by  contaminants, so information about the concentration of SO 2  is important to know. This study aimed to investigate the  impact  of  meteorological  factors  and  the  number  of vehicles  on  SO 2   concentrations. Impinger was used for air sampling, and pararosaniline method was used for determining SO 2  concentration. Sampling and calculation  of the number of passing vehicles were performed 3 times ie in the morning, afternoon and evening. Based on the results of the study, the highest concentrations of SO 2  were on the range of 15-21 mg/Nm3.
KONTRIBUSI PARAMETER METEOROLOGI DAN KONDISI LALU LINTAS TERHADAP KONSENTRASI PENCEMAR NO2 DI KOTA SEMARANG Istirokhatun, Titik; Ratnasari, Elaeis Noviani; Utomo, Sudarno
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 13, No 2 (2016): September 2016
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (650.752 KB) | DOI: 10.14710/presipitasi.v13i2.48-56

Abstract

Air pollution and its public health effects are drawing increasing concern from the environmental health research community, environmental regulatory agencies, industries as well as public. Nitrogen dioxide (NO2) is one of those common air pollutants that potentially major cause health problems. Transportation contributed most of the air pollution. In addition, the number of vehicles that are passing and queuing on the crossroads because of traffic light can affect the concentration of NO 2. Besides, in these places there are a lot of road users which are potentially exposed by contaminants, so information about the concentration of NO2 on road side is important to know. This study aimed to investigate the impact of meteorological factors and the number of vehicles on NO2 concentrations. Impinger fritted bubler was used for air sampling, and Griess Saltzman method was used for determining NO2 concentration. Sampling and calculation of the number of passing vehicles were performed 3 times ie in the morning, afternoon and evening. Based on the results of the study, the highest concentrations of NO2 were on the range of 0.7-4.2 mg/Nm3.
ANALISA PENGARUH KELEMBABAN KAYU TERHADAP KONSENTRASI PM 2,5 DALAM DAPUR BERBAHAN BAKAR KAYU SKALA REPLIKASI DAN RUMAH TANGGA Istirokhatun, Titik; Wardhan, Irawan Wisnu; Primelya, Azaria
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 8, No 1 (2011): Vol 8, No 1 (2011)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (282.994 KB) | DOI: 10.14710/presipitasi.v8i1.8-13

Abstract

PM2,5  adalah salah satu polutan dari aktivitas memasak rumah tangga berbahan bakar kayu yang berpotensi besar menjadi penyebab masalah kesehatan di sejumlah negara berkembang di dunia (Huboyo, dkk, 2009). Tujuan penelitian ini adalah untuk mengetahui pengaruh kelembaban kayu terhadap konsentrasi PM2,5 pada proses pembakaran. Penelitian dilakukan pada  skala laboratorium dengan menggunakan reaktor sederhana sebagai dapur  replikasi, dan skala lapangan di 10 rumah yang menggunakan bahan bakar kayu dalam aktivitas memasak. Dari hasil penelitian skala replikasi dihasilkan bahwa kelembaban kayu terhadap distribusi massa PM2,5 memiliki hubungan yang cukup, karena adanya kontrol udara sehingga partikel yang  dihasilkan dapat tertampung dengan baik. Sedangkan pada penelitian pada dapur rumah tangga menunjukkan tidak ada satu pun hubungan antara distribusi massa PM2,5 dengan 4 faktor yaitu lama memasak, penggunaan kayu, laju pembakaran dan kelembaban kayu, karena proses memasak setiap sampel berbeda. Dari hasil penelitian skala replikasi semakin tinggi kelembaban maka semakin tinggi konsentrasi PM2,5  yang dihasilkan, hal ini erat kaitannya dengan dilakukannya kontrol udara serta waktu pembakaran. Hasill penelitian pada dapur rumah tangga mengindikasikan  kelembaban kayu tidak mempengaruhi konsentrasi PM2,5 karena adanya pengaruh angin, tambahan bahan bakar yang digunakan serta faktor lainnya.
Potensi Chlorella Sp. untuk Menyisihkan COD dan Nitrat dalam Limbah Cair Tahu Istirokhatun, Titik; Aulia, Mustika; Utomo, Sudarno
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 14, No 2 (2017): September 2017
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (188.145 KB) | DOI: 10.14710/presipitasi.v14i2.88-96

Abstract

In order to examine the potential use of tofu-processing wastewater as growth media for microalgae, this research was conducted by cultivating microalgae in varying concentrations. The type of microalga selected in the experiment was Chlorella sp. due to its high reproductive rate. The ability of Chlorella sp. in removing the levels of COD and nitrate contained in the tofu liquid waste were also investigated. This study examined the microalgae growth rate, microalgae cell abundance values, reduced organic levels of COD and nitrate of Chlorella sp which cultivated in tofu wastewater medium. The optimum growth of Chlorella sp was found at 30% v/v of tofu wastewater which reduce COD and nitrate up to 77.40% and 30.03% respectively. From this study, we concluded that tofu-processing wastewater is effective to use as microalgae growth media and at the same time, effective to eliminate COD and nitrate.
KUALITAS UDARA DALAM RUANG DI DAERAH PARKIR BASEMENT DAN PARKIR UPPERGROUND (STUDI KASUS DI SUPERMARKET SEMARANG) Huboyo, Haryono Setiyo; Istirokhatun, Titik; Sutrisno, Endro
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 13, No 1 (2016): Maret 2016
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (326.726 KB) | DOI: 10.14710/presipitasi.v13i1.8-12

Abstract

Ever increasing building growth in urban areas is limited by land availability. Lack of space in this area lead to build high rise building rather landed building. In this type of building, parking area  is  built  in  the  basement  and  or upperground  inside  the  building.  Within  this  enclosed space,  indoor  air quality  might  a  problem.  This  study  focus  to  compare  emerged pollutants between  basement  parking  area  and  upperground  parking  area in  supermarket  building.  The dust  sampler,  the  impinger  and  the  CO monitor  were  used  to  measure  TSP,  NO 2   and  CO concentrations respectively  in  these  areas  during  supermarket  operations.  In  the basement area,  in  particular,  the  TSP  concentrations  tend  to  exceeds  300 µg/m 3   mainly  at  weekend period. While for NO 2  and CO concentrations still meet the air quality standard. Based on these findings it seems the main source of pollutants was derived from dust resuspension. Thus, the mitigation measures to reduce this dust resuspension should be emphasized in order to prevent air quality deterioration in the basement parking area.
Membrane Technology Application for Fractionation Process to Obtain High Quality Glucosamine Rokhati, Nur; Istirokhatun, Titik; Hamada, Nur ?Aini; Apriyanti, Dwi Titik
Reaktor Volume 20 No.2 June 2020
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (356.95 KB) | DOI: 10.14710/reaktor.20.2.103-108

Abstract

Glucosamine, monosaccharide from chitosan obtained from the chitin deacetylation process, has been used widely in various fields such as nutrition, pharmacy, and cosmetics. Glucosamine can be obtained from the hydrolysis of chitosan. Enzymatic hydrolysis provides the advantage of mild reaction conditions, environmentally friendly, and high yield. But until now, the separation of glucosamine from the chitosan hydrolysis fraction has been an obstacle. Ultrafiltration membranes offer an efficient filtration process because they do not require additional chemicals. The performance of ultrafiltration membranes was analyzed from the fractionation process of chitosan hydrolysis. The PES membranes in 10, 25, and 50 kDa were used to filter hydrolyzed Low Molecular Weight Chitosan (LMWC) in varied concentrations. The experiment was carried out in crossflow membrane module for flat sheet at room temperature in 1 bar. The permeate flux during filtration decreased rapidly at the initial and gradually over time because of fouling and concentration polarization. The more concentrated hydrolyzed LMWC solution resulted higher percentage of rejection up to almost 20% at the same membrane MWCO while higher MWCO resulted lower rejection percentage for the same hydrolyzed LMWC concentration. The FTIR spectrum of the used membranes of all types had absorption bands of glucosamine which proved that the fractionation process occurred. The time retention in HPLC chromatograms of glucosamine produced were similar with standard glucosamine. Thus, ultrafiltration could be applied for hydrolyzed LMWC fractionation process.Keywords: fractionation; glucosamine; LMWC; MWCO; ultrafiltration
Layer by Layer Composite Membranes of Alginate-Chitosan Crosslinked by Glutaraldehyde in Pervaporation Dehydration of Ethanol Rokhati, Nur; Istirokhatun, Titik; Samsudin, Asep Muhamad
International Journal of Renewable Energy Development Vol 5, No 2 (2016): July 2016
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.5.2.101-106

Abstract

Hydrophilicity of membrane causing only water can pass through membrane. Pervaporation process using organophilic membrane has been offered as alternative for ethanol dehydration. This paper investigate pervaporation based biopolymer composite membrane from alginate-chitosan using layer by layer method prepared by glutaraldehyde as crosslinking agent and polyethersulfone (PES) as supported membrane. Characterization of crosslinked of composite membrane by FTIR helped in identification of sites for interaction between layers of membrane and support layer (PES). The SEM showed a multilayer structure and a distinct interface between the chitosan layer, the sodium alginate layer and the support layer. The coating sequence of membranes had an obvious influence on the pervaporation dehydration performance of membranes. For the dehydration of 95 wt% ethanol-water mixtures, a good performance of PES-chitosan-alginate-chitosan (PES/Chi/Alg/Chi) composite membrane was found in the pervaporation dehydration of ethanol. Article History: Received April 12nd , 2016; Received in revised form June 25th , 2016; Accepted July 1st , 2016; Available onlineHow to Cite This Article: Rokhati, N., Istirokhatun, T. and Samsudin, A.M. (2016) Layer by Layer Composite Membranes of Alginate-Chitosan Crosslinked by Glutaraldehyde in Pervaporation Dehydration of Ethanol. Int. Journal of Renewable Energy Development, 5(2), 101-106.http://dx.doi.org/10.14710/ijred.5.2.101-106 
Tingkat Korosifitas Air Permukaan Hilir Rawa Pening pada Musim Kemarau dan Penghujan Purwono, Purwono; Oktiawan, Wiharyanto; Istirokhatun, Titik; Nurfaiz, Agus
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 17, No 3 (2020): November 2020
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (764.763 KB) | DOI: 10.14710/presipitasi.v17i3.215-222

Abstract

Corrosion is an important factor that can affect the quality of air used by humans. This has an impact on health and economic factors, damage to air distribution equipment. The level of corrosivity of surface water as raw water for drinking water is important to be examined before the water enters the processing process or other uses such as hydroelectric power (PLTA). This study aims to measure the level of water corrosivity on the surface of the Pening swamp during the dry and rainy seasons in 2018. Taking air samples on the surface of the Pening swamp, then carrying out laboratory tests on the parameters of air corrosivity. The results showed that the downstream surface of the Pening swamp was not corrosive in terms of pH, temperature, TDS, and chloride parameters. The pH value in the dry season (J1) is 7.00, while in the rainy (J2) it is 7.77 and is non-corrosive. The temperature values are 28.6oC and 29.3oC in the rainy and dry seasons, respectively. The TDS measurement results in the dry season are lower than the rainy season by a difference of 12 mg / l. In the dry season it is 141 mg / l and the rainy season is 153 mg / l. This increase probably came from geological material (geological material) such as rocks and soil around the Pening Swamp Lake. Other sources of TDS include urban land, road workers, agricultural land and pasture. Human activities also increase in the increase of TDS in water including domestic activities (bathing and washing), trade, and industry. Chloride levels were 2.19 mg / l and 3.19 mg / l. This research has implications for the users of Sungai Pening Swamp. The corrosivity of air measurement is also by microbiological parameters which need to be investigated further.
Co-Authors Akhmad Masykur Hadi Musthofa Ananda Dwi Utomo Apriliana, Pamella Aprilina Purbasari Apriyanti, Dwi Titik Ariestya Meta Devi Asep Muhamad Samsudin Asep Muhamad Samsudin, Asep Muhamad Aulia, Mustika Azaria Primelya Bambang Pramudono Berkah Fajar Budiono Joko Nugroho Desiriani, Ria Destiasari, Ajeng Dwi Titik Apriyanti Dyah Ayu Kresnianingrum Elaeis Noviani R. Elaeis Noviani R. Elaeis Noviani Ratnasari, Elaeis Noviani Endro Sutrisno Fajar S. S Nur Filardli, Abdullah Malik Islam Fiorentina Sinurat Gonzales, Ralph Rolly Hamada, Nur ?Aini Haryono Setiyo Huboyo Heny Kusumayanti Heru Susanto I Nyoman Widiasa Irawan Wisnu Wardhan Ita Tetriana A. Ita Tetriana A. Ita Tetriana Agustini Kiki Ramayana L. Tobing Kiki Ramayana L. Tobing Lidiya Novelendah Lulluil Mahsunnah Luqman Buchori Luthfi Kurnia Dewi M Husen Senoaji Mohammad Sulchan Nur Rokhati Nur Rokhati Nur ‘Aini Hamada Nurandani Hardyanti Nurfaiz, Agus Oktiawan Wiharyanto Pertiwi Andarani Purwono Purwono, Purwono Ramadan, Bimastyaji Surya Reisa Novita Marpaung Siahaan, Samuel Ezra Siswo Sumardiono Sri Sumiyati Sudarno Sudarno Sudarno utomo Sumardi Widiyanto, Edhi Wiharyanto Oktiawan Winardi Dwi Nugraha