Garuda - Garba Rujukan Digital

p-Index From 2021 - 2026

2.33

P-Index

This Author published in this journals

All Journal Jurnal Ilmu Lingkungan Jurnal Teknik Kimia Jurnal Dampak SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Media Ilmiah Teknik Lingkungan Jurnal EnviScience (Environment Science) Nusantara Science and Technology Proceedings International Journal of Eco-Innovation in Science and Engineering (IJEISE) Envirous AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Jurnal Sains dan Teknologi Environmental Engineering Journal ITATS Journal Serambi Engineering (JSE) (Journal of Environmental Sustainability Management)

Okik Hendriyanto Cahyonugroho

Program Studi Teknik Lingkungan, UPN “Veteran” Jawa Timur

Author-ID : 245620

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 Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Veterinary Other

Published : 21 Documents Claim Missing Document

Claim Missing Document

Articles

1 2 3

KINETIKA ADSORPSI WARNA LIMBAH TEKSTIL DENGAN ABU SEKAM PADI MENGGUNAKAN REAGEN TAWAS Cahyonugroho, Okik Hendriyanto
Jurnal Teknik Kimia Vol 1, No 2 (2007): JURNAL TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v1i2.70

Abu sekam padi (ASP) mengandung lebih dari 90 % silika (SiO2). Silika merupakan suatusenyawa yang dapat dipakai sebagai adsorben. Al2(SO4)3 merupakan senyawa yang menyebabkandestabilisasi didalam air sehingga dapat berfungsi sebagai zat yang menyebabkan terjadinyaikatan hidrogen. Pada limbah cair tekstil, zat warna yang terlarut didalam air dapat diserap olehASP. Agar proses adsorpsi berlangsung cepat maka perlu ditambahkan reagen.Penelitian ini bertujuan untuk mengetahui efektivitas ASP dalam menyerap warna dalamlimbah tekstil. Hal ini dapat ditunjukkan oleh kinetika adsorpsi dari ASP tersebut. Metodepenelitian mengunakan regresi linier untuk menentukan konstanta adsorpsinya. Variabel yangdiperiksa adalah volume reagen, berat ASP dan waktu pengadukan yang digunakan untukmenghitung konstanta laju adsorpsi.Hasil penelitian menunjukkan bahwa semakin besar berat ASP, semakin besar konstantaadsorpsi dan semakin besar volume reagen semakin besar konstanta adsorpsi. Efektifitas adsorpsiditunjukkan oleh konstanta adsorpsi yang paling tinggi yaitu pada volume reagen yang terbanyak(7,5ml ) dan penambahan ASP paling banyak (20 gr )Kata kunci : abu sekam padi, adsorpsi, tawas, warna

Solid Waste Management Practices at The Academic Institution: Current Situation and Strategic Plan Euis Nurul Hidayah; Imroatul Mufidah; Indah Fitriana Solichah; Okik Hendriyanto Cahyonugroho; Kindriari Nurma Wahyusi
International Journal of Eco-Innovation in Science and Engineering Vol. 1 No. 01 (2020): IJEISE
Publisher : Engineering Faculty, University of Pembangunan Nasional Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/ijeise.v1i01.11

Waste management is one of the actionsof environmental management for improving environmental quality. This study describes the waste management in the campus through improvement of operational techniques, starting from container, collection, and transportation. Case study was taken in the university, which the amount of waste generation is about 166.559 kg/day or 0.013 L/person/day. The waste collection system is designed to use individual disaggregated sorting patterns that are adjusted to the composition of the waste, colour differentiation, and label of the container. Amount of sorted containers are 478 pieces. The waste collection system is planned by an indirect individual collection pattern and a temporary shelter plan in the form of a partition wall is adjusted to the composition of the waste. Planning for waste transportation system is using a fixed container system with motor cart under capacity of 2.3 m3 with 1 fleet. Transportation is carried out on a scheduled basis. Transportation management is arranged twice per-day for organic waste, once per-day for valuable waste, once per-week for hazardous waste, once every 2 days for other water. Transportation schedule is carried out twice per-day, in the morning and evening.

Characterization and Removal of Dissolved Organic Matter in River Water Through Preoxidation-Coagulation Process Euis Nurul Hidayah; Grace Claudia Anastasia; Okik Hendriyanto Cahyonugroho
Dampak Vol 16, No 1 (2019)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.16.1.20-25.2019

Dissolved organic matter (DOM), which is part of of natural organic matter or NOM, contained of carbon compound and can cause problems related to taste, odor, and disinfection by-products (DBPs) in water and treated water. Permanganate is strong oxidant and have been know its efficiency in oxidazing organic compound. Coagulation is most widely used in all water treatment plant due to its efficiency in removing suspended solid. The objectives of this study is to characterize and to remove natural organic matter in term of Â DOMÂ in water through KMnO4 preoxidation, Al2(SO4)3 or FeCl3 coagulation, KMnO4 preoxidation followed by Al2(SO4)3 or FeCl3 coagulation. Raw water, which was taken from Jagir River in Surabaya, and treated water were measured quantitatively by using total organic carbon (TOC), ultraviolet at wavelength 254 nm (UV254) in order to know its aromatic properties. In addition, fourier transfor m infrared spectroscopy (FTIR) was used to identify the functional group of DOM in water and treated water. The results showed that raw water has high TOC concentration (6,9 mg/L) and mainly composed of aromatic (UV254 0.075 cm-1). The optimum result showed that TOC concentration and UV254 removed significantly into 4,2 mg/L and 0,0020 cm-1, respectively after preoxidation followed by FeCl3 coagulation. According to FTIR analysis, mostly single bond carbon such as C-O and C-H still exist in treated water. This results indicated that preoxidation-coagulation has a better performance than preoxidation only and coagulation only.

Pengaruh Aerasi Dalam Constructed Wetland Pada Pengolahan Air Limbah Domestik Euis Nurul Hidayah; Andrysah Djalalembah; Gina Aprilliana Asmar; Okik Hendriyanto Cahyonugroho
Jurnal Ilmu Lingkungan Vol 16, No 2 (2018): Oktober 2018
Publisher : School of Postgraduate Studies, Diponegoro Univer

ABSTRAKPenanganan air limbah domestik Kota Surabaya selama ini dilakukan dengan 2 cara, yakni untuk blackwater dialirkan ke tangki septik dan greywater dialirkan ke drainase tanpa pengolahan. Hal ini menyebabkan peningkatan pencemar pada sungai sebagai air baku. Salah satu teknologi alternatif yang dapat diaplikasikan dengan mudah dan rendah biaya operasional dibanding pengolahan air limbah lainnya adalah constructed wetland dengan menggunakan tanaman Iris pseudoacorus sebagai kombinasi pengolahan biofilter dan proses fitoteknologi. Penelitian ini dilakukan untuk mengetahui efisiensi dari constructed wetland dengan tanaman Iris pseudoacorus untuk mengolah limbah domestik, serta menentukan bagaimana pengaruh dari adanya aerasi dan pengaruh waktu tinggal pada sistem constructed wetland dalam menurunkan bahan organik dan nitrogen pada air limbah. Penelitian ini dilakukan dalam skala uji laboratorium menggunakan reaktor berkapasitas 30 liter. Air limbah dialirkan pada reaktor dengan waktu tinggal 2 hari dan 3 hari, dengan variasi aerasi dan efisiensi pencemar diukur dengan parameter BOD, dan ammonia. Hasil penelitian ini menunjukan bahwa kemampuan penyisihan BOD, dan ammonia dari limbah air domestik oleh reaktor constructed wetland dengan tambahan aerasi dan waktu tinggal selama 4 hari sangat efektif. Reaktor ini mampu menurunkan nilai BOD hingga 96% dan nilai ammonia sebesar 97%.ABSTRACTWastewater domestic in Surabaya City has been treated in two methods, including septic tank for blackwater and directly discharged into drainage system for greywater. This caused an increasing pollutant loading in source water. Constructed wetland with Iris pseudoacorus, one of the alternative natural treatment technology through biofilter and phytotechnology process, could be applied easily and less costly to other treatment. This research was conducted to know the efficiency of constructed wetland with Iris pseudoacorus in domestic wastewater treatment, and to reveal the effect of aeration and detention time in reducing organic and nitrogen content in domestic wastewater. Experiment has been conducted on a laboratory scale of continue aerated reactor and without aeration as control reactor. Detention time (days) 2 and 3 was setup, then sample was taken for BOD and ammonia measurement. The results indicated that constructed wetland with aeration and detention time 4 days had a higher performance to remove BOD up to 96% and ammonia up to 97% than without aeration and less than 4 days process.Keywords: Domestic Wastewater, Constructed Wetland, Phytotechnology, Iris pseudoacorus, Aeration.Sitasi: Hidayah, E. N., Djalalembah, A., Asmar, G.A. dan Cahyonugroho, G.A. (2018). Pengaruh aerasi dalam constructed wetland pada pengolahan air limbah domestik. Jurnal Ilmu Lingkungan, 16(2),155-161, doi:10.14710/jil.16.2.155-161

SOSIALISASI PENANGANAN KEGAGALAN RESIKO PENGOLAHAN AIR MINUM ISI ULANG DI KECAMATAN GUNUNG ANYAR SURABAYA Euis Nurul Hidayah; Okik Hendriyanto Cahyonugroho; Gabriela Veronica
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 3, No 2 (2020): Mei
Publisher : Universitas Muhammadiyah Mataram

ABSTRAKAdanya peluang bagi banyak industri untuk membuka depot air minum isi ulang (DAMIU), khususnya di Kecamatan Gunung Anyar, Surabaya. Isu yang muncul saat ini adalah rendahnya jaminan kualitas terhadap air minum isi ulang (AMIU) yang dihasilkan DAMIU. Jumlah koliform yang semakin besar menunjukkan kemungkinan bakteri patogen yang hidup di air yang terkontaminasi pencemaran. Meninjau permasalahan tersebut, maka kegiatan pengabdian masyarakat dilakukan dengan tujuan untuk menginformasikan kepada pengusaha DAMIU di Kecamatan Gunung Anyar tentang hasil pendataan teknologi pengolahan AMIU yang digunakan, menginformasikan hasil kualitas AMIU dari masing-masing DAMIU, menginformasikan risiko penyebab yang mempengaruhi kualitas AMIU dan memberikan rekomendasi upaya mengurangi risiko kegagalan produksi AMIU kepada pengusaha DAMIU. Sejumlah DAMIU menggunakan teknologi sinar UV sebesar 16 depot, teknologi sinar UV-Ozone sebesar 5 depot, teknologi RO sebesar 1 depot, sedangkan terdapat 1 depot tidak menggunakan teknologi desinfeksi. Analisa dari kegagalan kualitas air minum isi ulang pada parameter mikrobiologis (total koliform dan Eschericia coli). Risiko penyebabnya adalah karena sumber daya manusia, sumber air baku, metode, sarana dan prasaran, pengawasan dan evaluasi. Oleh karena itu perlu diberikan rekomendasi untuk mengurangi risiko kegagalan parameter mikrobiologis melalui waktu kontak UV atau Ozon minimal 4 menit, monitoring rutin perawatan unit pengolahan, menyusun standar operasional prosedur. Kata kunci: air minum isi ulang; risiko; eschericia coli; total koliform; desinfeksi ABSTRACTThere are opportunities for many industries to open refill drinking water stores (RDWS), especially in Gunung Anyar District, Surabaya. Some issues have been arised recently, such as issue of low quality assurance of drinking water produced by RDWS. The greater number of coliforms indicates the possibility of pathogenic bacteria that live in contaminated water. Reviewing these problems, community service activities were carried out with the aim of informing to RDWS owner in Gunung Anyar District about the results of data collection on RDW processing technology used, informing the results of RDW quality from each RDWS, informing the risk of causes affecting RDW quality and providing recommendations to reduce the failurd risk of RDW production to RDWS owner. Regarding disinfection technology, about 16 stores applied ultraviolet technology, UV-Ozone was used by stores, and the remain used RO technolog. Analysis of the failure of refill drinking water quality on microbiology parameters (total coliform and Eschericia coli). Those risk were arised due to human resources, raw water sources, methods, facilities and infrastructure, monitoring and evaluation. Therefore it is necessary to provide recommendations to reduce the risk of failure of microbiologyl parameters through UV or Ozone contact time of at least 4 minutes, routine monitoring of treatment units, preparing procedure operational standard. Keywords: refill drinking water; risk; eschericia coli; total coliform; disinfection

SOSIALISASI PENGELOLAAN SAMPAH KERTAS, PLASTIK DAN LOGAM MELALUI BANK SAMPAH DI KAWASAN PERUMAHAN Euis Nurul Hidayah; Ariq Akbar Maulana; Okik Hendriyanto Cahyonugroho
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 4, No 2 (2021): April
Publisher : Universitas Muhammadiyah Mataram

ABSTRAKSehubungan dengan masalah persampahan, umumnya disebabkan oleh tingginya kuantitas timbulan sampah yang tidak dikelola. Salah satu upaya untuk menanggulangi permasalahan sampah kota, khususnya di tingkat wilayah terendah atau level Rukun Tetangga/Rukun Warga (RT/RW) dengan membentuk bank sampah menjadi penting. Kegiatan pengabdian masyarakat yang dilakukan bertujuan untuk melakukan sosialisai kepada warga di Perumahan SK RT 13/RW 5 Sidoarjo tentang pengelolaan sampah plastik, kertas dan logam melalui bank sampah. Pengabdian masyarakat dilaksanakan dengan tahapan menyajikan hasil penerapan pengelolaan sampah melalui bank sampah yang telah dilaksanakan di perumahan lain, dan menyampaikan rencana teknis pengelolaan sampah melalui bank sampah yang akan dilaksanakan di Perumahan SK RT 13/RW 5 Sidoarjo. Pengembangan bank sampah di perumahan akan membantu warga dan pemerintah lokal untuk mengelola sampah berbasis komunitas secara bijak dan dapat mengurangi sampah yang diangkut ke Tempat Pembuangan Akhir (TPA). Sampah tercecer, kegiatan pemulung dan kebutuhan kas merupakan dasar pemikiran terhadap perlunya implementasi bank sampah. Rencana teknis pelaksanaan dimulai dari pendidikan sampah, sosialisasi, pembentukan koordinator, pemberian kantong, pemilahan, pengumpulan sampai dengan penjualan sampah plastik, kertas, dan logam. Koordinator dan pengurusnya menjadi pelaku langsung yang memberikan dorongan terhadap kelancaran program di masyarakat. Hasil dari pengelolaan sampah akan berdampak kepada masyarakat, dari segi lingkungan,kesehatan, sosial budaya dan ekonomi. Kata kunci: sampah; sosialisasi; bank sampah. ABSTRACTDomestic trash issues has been developing into one of the main environmental issues, due to increasing domestic trashh inline with increasing population. A trash bank is one of the trash management for solving trash issues, which is implemented in home and its surrounding or known as Rukun Tetangga/Rukun Warga (RT/RW). RT/RW is lowest level of community. The aim of this study is to encourage community at RT 13/RW 5 SK Residence of Sidoarjo in handling plastic, papers, metals trash through a trash bank. The basic idea of implementation a trash bank was unmanaged trash, scavenger activities. The technical plan for trash bank implementation was strated from educational, encouragement, coordination, sharing a trash bag, separation, collection until selling plastics, used papers, metals trash. Coordinator and the representatives persons will be the leader and motivator to encourage the community for implementing trash bank in order to manage trash. The trash management will give benefit for society, environmental, health, social culture and economic. Keywords: trash; encourage; trash bank.

Adsorption Capacity of Activated Carbon of Peanut Shells on Fe Removal Agil Harnowo Putra; Miftahul Jannah; Euis Nurul Hidayah; Okik Hendriyanto Cahyonugroho
Nusantara Science and Technology Proceedings 4th International Seminar of Research Month
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2019.0450

Cellulose contained in peanut shells which are agricultural waste is considered to be potential as an adsorbent for removing heavy metals. Therefore, it is necessary to analyze the capacity of absorbance or the ability of meshes in the continuous adsorption process in removing heavy metal Fe in well water. The feasibility of an agricultural waste related to its use as an adsorbent has also been studied in this study through characterization by FTIR test which aims to determine the presence of cellulose organic compounds that play a role in the process of heavy metal adsorption. While the study of adsorption capacity in this study uses a continuous process that is generally carried out by Thomas modeling. Where in this study a continuous adsorption process was carried out to obtain saturation time from the adsorption of peanut shells in absorbing Fe metal. So that the absorbance capacity obtained from the once used activated carbon peanut shell has been made. In this study, a continuous adsorption process was carried out with a mass variation of 250 gr and 500 gr. This continuous adsorption process is obtained. The highest price of Constant Thomas (Kth) and the price of absorbance capacity (qo) is using activated carbon peanut shells with the use of 500 grams following the Thomas equation model y = -0.1701x + 3.3142 with a correlation coefficient (R²) = 0.4767 while the breakthrough point was reached in the 60th minute after well water through the bed

Phycoremediation Using Microalgae Chlorella vulgaris and Nannochloropsis oculata to Remove Lead Heavy Metals Nafi'ah, Chia Fifin; Cahyonugroho, Okik Hendriyanto
INSOLOGI: Jurnal Sains dan Teknologi Vol. 2 No. 4 (2023): Agustus 2023
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v2i4.2278

Heavy metals are pollutant parameters that contain high toxicity and are dangerous which can accumulate in the tissues of living things. One of the heavy metals contained in wastewater is lead (Pb). This metal is included in the extremely toxic category which can cause health problems. One way to treat waste containing the heavy metal Pb is by bioremediation using microalgae (phycoremediation). In this study, phycoremediation used the microalgae Chlorella vulgaris and Nannochloropsis oculata, as well as a consortium of both. This study aims to determine the ability of each microalga and the consortium of the two microalgae in removing lead heavy metals. The phycoremediation potential was measured based on the ratio of microalgae varied (100:0, 50:50, and 0:100) and the concentration of Pb waste (1, 5, and 10 mg/L) within 14 days on a batch scale. The results showed that the microalgae Chlorella vulgaris in reactor 10B (100% Chlorella vulgaris, 0% Nannochloropsis oculata) was able to remove 85.0% from a concentration of 10 mg/L to 1,5 mg/L.

Perancangan Tudung Isap Debu untuk Sistem Dust Collector pada Suction Point Area Press di PT XYZ Stalis, Ahmad Nazil; Cahyonugroho, Okik Hendriyanto
Environmental Engineering Journal ITATS Vol 3, No 2 (2023): Environmental Engineering Journal ITATS
Publisher : Teknik Lingkungan, Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.envitats.2023.v3i2.4550

Pengendalian debu dalam sektor industri melibatkan proses penghapusan partikel padat dari aliran udara untuk mengatasi masalah debu yang dapat berdampak pada keamanan dan kesehatan. Studi ini bertujuan untuk meningkatkan kinerja sistem dust collector yang diterapkan di area Press PT XYZ, di mana sistem tersebut belum optimal dalam mengendalikan debu yang bertebaran di lingkungan kerja. Penelitian ini melibatkan studi literatur, pengamatan lapangan, pengumpulan dan analisis data, serta perancangan desain untuk merancang solusi yang tepat. Perancangan fokus pada desain tudung isap dengan memodifikasi bentuk, lokasi, kecepatan tangkap dan laju aliran yang melaluinya. Hasil perhitungan menunjukkan bahwa untuk laju aliran udara 703,925 cfm, kecepatan tangkap yang dibutuhkan adalah 726,631 fpm. Sedangkan untuk bentuk tudung berdiri bebas dengan flensa, kecepatan tangkap yang dibutuhkan adalah 167,864 fpm. Berdasarkan perbandingan dengan kondisi eksisting, bentuk tudung booth dengan luas bukaan 0,969 ft2 terhubung ke saluran dengan luas bukaan 0,313 ft2 merupakan pilihan yang sesuai. Lokasi tudung isap ditempatkan di bagian atas bukaan bin dengan jarak 0,656 ft dari bukaan tudung. Implementasi desain tudung ini diharapkan dapat meningkatkan kinerja sistem dust collector dalam mengendalikan emisi debu di PT XYZ.

Comparison of DAF Pretreatment between Static Mixer and Impeller Mixer for Oil and Grease Reduction Novembrianto , Rizka; Rosariawari, Firra; Cahyonugroho, Okik Hendriyanto; Nisa', Syadzadhiya Qothrunada Zakiyayasin; Sitogasa, Praditya Sigit Ardisty; Murti, Restu Hikmah Ayu
Nusantara Science and Technology Proceedings 8th International Seminar of Research Month 2023
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2024.4107

The problem of domestic wastewater originating from restaurants is the largest contributor to organic wastewater in urban waters. Among them are waste water parameters, namely oil, and grease. Oils and grease are compounds that do not dissolve easily in water. However, it can be dissolved with non-polar organic solvents. The carbon chains of oils and grease are also long. So, it is difficult to decompose and takes a long time if processing uses the help of microorganisms. So, the alternative is to use physical-chemical processing. In this research, we tried using a static mixer and an impeller mixer. We conducted a systematic review of DAF techniques in wastewater treatment. We reviewed six indexed databases namely dissolved air flotation, microbubbles, wastewater treatment, and key operational and design parameters involved in the effectiveness of the flotation process. In this pre-treatment, the focus is on the withdrawal/discharge speed in collecting wastewater as a test and the effectiveness of mixing wastewater with coagulants and air pressure. These three aspects are used in equilibrium to achieve the optimum dose for the static mixer use scheme. Meanwhile, the impeller mixer scheme uses rotational speed in mixing with the coagulant, contact time, and Reynolds number to achieve the required turbulence. Apart from that, the use of electrical energy in the pump is also calculated in these two schemes. The results obtained were the amount of weight of oil and grease collected in the static mixer pretreatment of 9.12% w/v and the impeller mixer of 7.63% w/v and the results of the organic content of the Chemical Oxygen Demand (COD) parameter for the static mixer were 86.92 % and mixer impeller 78.86 %. From these results, static mixers have advantages over using impeller mixers in terms of the effectiveness of the oil and grease reduction process.

Co-Authors Agil Harnowo Putra Amini, Novira Putri Andrysah Djalalembah Ariq Akbar Maulana Astika, Maeza Nurrisma Bota, Gaudentius Indra Ardhanu Clever, Mahendra Euis Nurul Hidayah Gabriela Veronica Gina Aprilliana Asmar Grace Claudia Anastasia Hardiyanto, Rachmat Yuda Imroatul Mufidah Indah Fitriana Solichah Kindriari Nurma Wahyusi Miftahul Jannah Nafi'ah, Chia Fifin Nisa', Syadzadhiya Qothrunada Zakiyayasin Novembrianto, Rizka Nurjanah, Fadhilah Labibah Pandriratri, Purnasari Praditya Sigit Ardisty Sitogasa Purnomo, Yayok Suryo Rachmanto, Tuhu Agung Redatu Putri, Yolanda Aprian Restu Hikmah Ayu Murti Rosariawari, Firra Rosyadi, Muhammad Rizal Salamah, Shalzafatihah Stalis, Ahmad Nazil

Title

Found 21 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 21 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 21 Documents
Search