Browsing by Author "Hanifah, Abu"

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    ANALISIS KANDUNGAN FORMALDEHID DALAM MINUMAN YOGHURT PADA KEMASAN PLASTIK POLYETHYLEN TEREFTALATE (PET) DAN HIGH DENSITY POLYETHYLEN (HDPE)
    (2013-07-01) Bali, Subardi; Hilda Sari, Amelia; Hanifah, Abu
    Polyethylene tereftalate (PET) dan high density polyethylene (HDPE) merupakan bahan kemasan yang biasa digunakan untuk minuman yoghurt. Kemasan ini memiliki kelemahan, karena terjadinya migrasi zat monomer pada plastik ke dalam minuman selama penyimpanan. Salah satu kemungkinan monomer yang dapat terbentuk adalah formaldehid akibat aktivitas mikroorganisme dan asam yang tinggi selama waktu penyimpanan. Konsumsi makanan yang terkontaminasi formaldehid secara terus menerus dapat mengakibatkan kerusakan hati, ginjal, jantung dan berpeluang terkena penyakit kanker. Penelitian bertujuan untuk menentukan kandungan formaldehid dalam minuman yoghurt yang dikemas dengan plastik PET dan HDPE berdasarkan variasi waktu penyimpanan. Analisis kandungan formaldehid dilakukan berdasarkan variasi waktu penyimpanan (dalam kulkas bersuhu 40C) mulai awal waktu pemasaran 0 hari sampai 70 hari. Penentuan kandungan formaldehid dilakukan dengan spektrofotometer UV-Vis (570 nm) dengan menggunakan Reagen Schiff’s. Hasil penelitian menunjukkan bahwa lama penyimpanan berpengaruh terhadap kandungan formaldehid dalam minuman yoghurt. Kandungan formaldehid dalam minuman yoghurt yang disimpan selama 70 hari menunjukkan hasil yang tertinggi kemasan plastik PET (1,488 mg/L) dan HDPE (3,250 mg/L). Nilai ambang batas (NAB) kandungan formaldehid dalam bahan makanan dan minuman yang diperbolehkan berdasarkan IPCS (International Programme on Chemical Safety) dan tiga lembaga organisasi di PBB (ILO, UNEP dan WHO) adalah 1 mg/L. Dengan demikian, kadungan formaldehid yoghurt pada kemasan PET telah melebihi NAB setelah penyimpanan lebih dari 60 hari. Kandungan formaldehid dalam minuman yoghurt pada kemasan HDPE telah melebihi NAB setelah penyimpanan lebih dari 30 hari.
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    Nilai Ekonomi Mangroves: Sebuah Meta-Analisis
    (wahyu sari yeni, 2019-01-03) Hanifah, Abu; Eddiwan, Eddiwan
    This article presents a synthesis of literature that evaluates mangrove ecosystems through metaregression analysis. The main contribution of this study is the first meta-analysis that only focuses on mangrove forests, as one type of wetland in Riau province, Indonesia. The number of studies included in the regression analysis was 44 for a total of 145 observations. We include several regressions with the aim of overcoming outliers in the data as well as possible correlations between observations from the same study. We also investigate possible interaction effects between service types and GDP per capita. Our findings show that mangroves show a decrease in scale results, that GDP per capita has a positive effect on mangrove values, using replacement costs and contingency valuation methods produce higher estimates than using other methods. We also found that there were statistically significant interaction effects that affected the data. Finally, the results of this study indicate that using a weighted regression can provide better compatibility than the others. However, in terms of forecast performance, we found that all the models that were estimated to be carried out, in the same way, were unable to conclusively conclude whether one of the performances could exceed the others
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    POTENSI ARANG AKTIF BAMBU BETUNG (Dendrocalamus asper) SEBAGAI ADSORBEN KATION BESI (III) DAN ANION NITRAT DALAM AIR SUMUR BOR DESA BURUK BAKUL, KAB. BENGKALIS
    (2016-10-19) Filus, Muhammad; Anita, Sofia; Hanifah, Abu
    Tujuan penelitian ini adalah untuk mengetahui potensi arang aktif bambu betung (Dendrocalamus asper) sebagai adsorben kation besi (III) dan dan anion nitrat dalam air sumur bor. Arang aktif bambu betung dibuat dengan cara dikarbonisasi pada suhu 500°C selama 1 jam dan diaktivasi secara kimia yaitu dengan pemanasan pada suhu 500°C selama 30 menit dan 60 menit menggunakan furnace. Hasil karakterisasi menunjukkan bahwa arang aktif dengan waktu aktivasi 60 menit memberikan kualitas karakterisasi yang terbaik dengan nilai kandungan air 0,70%, kandungan abu 5,69% dan daya jerap terhadap metilen biru 21,60 mg/g. Potensi arang aktif diuji dengan menjadikannya adsorben kation besi (III) dan anion nitrat, dalam sampel air sumur bor. Konsentrasi kation besi (III) dianalisis menggunakan Spektrofotometer Serapan Atom (SSA) dan konsentrasi anion nitrat dengan Spektrofotometer UV-Vis. Dari hasil penelitian, dapat diketahui bahwa arang aktif bambu betung berpotensi untuk menjerap kation besi (III) sebesar 97,61% dengan konsentrasi sebelum adsorpsi 1,26 mg/L dan setelah adsorpsi 0.03 mg/L. Sedangkan terhadap anion nitrat, arang aktif bambu betung kurang potensial untuk menjerap anion tersebut dan nilai persentase penjerapannya hanya sebesar 52,30% dengan konsentrasi sebelum adsorpsi 1,95 mg/L dan setelah adsorpsi 0,93 mg/L.
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    POTENSI ARANG BAMBU BETUNG (Dendrocalamus asper) SEBAGAI ADSORBEN TERHADAP KATION TEMBAGA (II) DAN ANION SULFAT
    (2016-10-12) Amelia, Imelda; Anita, Sofia; Hanifah, Abu
    Bamboo betung (Dendrocalamus asper) is one of the plant types found in Buruk Bakul village where located in Bukit Batu Bengkalis. The aim of this study was to analyze of the potential of charcoal from bamboo betung as adsorben. Charcoal was made by doing carbonization of bamboo betung at 500oC for an hour and then re-carbonized for 60 and 30 minutes. The results indicated that charcoal from 60 minutes re-carbonization of bamboo betung contained 0.70% water, 5.69% ash and 80.18 m2/g surface area. The charcoal from 60 minutes re-carbonization proses was used for further adsorption analysis of borehole water in batch system. The results indicated that all tested parameters (pH, temperature, color, DHL, TSS, TDS, copper and sulphate) were below the minimum threshold required by PERMENKES No.416/MENKES/PER/IX/1990.
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    Sikap Mahasiswa Dalam Mengurangi Kerusakan Lingkungan
    (2018-03-15) Mashuri, Mashuri; Hanifah, Abu
    This research was conducted on students of Bengkalis Islamic High School of Economics. The purpose of this study to determine the relationship between environmental knowledge and environmental ethics with student attitudes in preventing environmental damage. The number of samples of 70 students taken at random. Methods of data collection by means of surveys in the form of questionnaires. Technique of data analysis using statistical test of correlation and simple and multiple linear regression, hypothesis testing done with significant level 0,05. The results showed: 1) existence of positive and significant relation between environmental knowledge to student attitude in reducing environmental damage equal to 0,337 with significant level 0,004 <0,05. 2) there is a positive and significant relationship between environmental ethics and student attitude in reducing environmental damage by 0.584 with a significant level of 0.000 <0.05. 3) there is a positive and significant relationship between knowledge and environmental ethics with the attitude of students in reducing environmental damage by 0.619 with a significant level of 0.000 <0.05. The conclusion that can be drawn from this research is that if environmental knowledge and environmental ethics are improved in the form of giving additional science about the importance of maintaining the environment then the student's attitude in reducing environmental damage will also increase
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    STUDIES ON ALIPHATIC AND AROMATIC HYDROCARBONSOF MINAS AND DURI CRUDE OILS USING GC-MS
    (2014-01-23) Anita, Sofia; Tamboesai, Emrizal Mahidin; Hanifah, Abu
    Studies on the crude oils from Minas and Duri located in Riau Province, Indonesia are reported in this paper. Minas and Duri are well-known as oil producing area in Indonesia. The oil fields are located in central eastern part of Sumatra Island. Physical characteristics of those crude oil are available but the chemical characteristic of the petroleum hydrocarbons are not well documented. Characterization of crude oils were identified by GC-MS to get specific fingerprint is very important. Extensive spillage of crude oil and refined oil is a possible source of hydrocarbon pollution in marine environment. GC-MS are very powerful instrument to analyse crude oil (Wang, 2004). Using molecular markers as a tool to see the relationship of the crude oils. It would affect their fate in the environment (Blumer et al., 1973). This study focuses on the characterization of alkanes and polycyclic aromatic hydrocarbons (PAHs) for the crude oils using 1st step (5% H2O deactivated silica gel column) and 2 ad step (fully activated silica gel column) and then GC-MS analysis. The PAHs signature are useful as source material for future 'fingerprinting' studies in monitoring oil contamination especially in Riau Province, Indonesia.