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Yayah Rodiana
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Environmental Science

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COMPARISON BETWEEN ACUTE TOXICITY AND CHEMICAL ANALYSIS OF NATURAL GAS DRILLING EFFLUENT SAMPLES USING PENAEUS MONODON Yayah Rodiana; Daam Settachan; Thundorn Saneanukul; Jerry Diamond
Jurnal Ecolab Vol 5, No 2 (2011): Jurnal Ecolab
Publisher : Pusat Standardisasi Instrumen Kualitas Lingkungan Hidup Laboratorium Lingkungan (P3KLL)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jklh.2011.5.2.45-54

Abstract

The regulation of point source discharges usually based on specific chemicals which describe thresholds below which no adverse impact on the receiving water. The limitation of this technique includes the fact that it does not take into account interactions among toxicants (e.g. additivity, synergism, antagonism). Therefore, toxicity testing is recommended as integrated approach for identifying toxic pollutants to complement chemical-specific analysis by assessing the sum toxicity of all components in the mixture. The objective of this research was the assessment of Penaeus monodon (PM) as an indicator species for toxicity testing through comparisons between results from 48-h LC50 and chemical analysis of the natural gas drilling effluent. Chemical analysis of effluent samples was performed in order to determine concentrations of BTEX (benzene, toluene, ethyl benzene, xylene) and heavy metals (Cr, Ni, Cu, As, Pb, Cd). Average 48-h LC50’s for PM was 2,94 % for effluent and 0.68 g/l for KCl. Comparison between acute toxicity and chemical analysis showed a significant correlation between toluene concentrations and 48-h LC50 in PM (p<0.05). No significant correlation was found between the detectable heavy metal concentrations and acute toxicity data in PM. Results suggest that the lack of correlation between toxicity and almost all chemical parameters indicates that toxicity testing is much more useful for monitoring toxicity of effluents than chemical analysis. Additional studies are needed to identify alternative toxicity endpoints as sensitive indicators of impacts on the environments
PENGKAJIAN METODE UNTUK ANALISIS TOTAL LOGAM BERAT DALAM SEDIMEN MENGGUNAKAN MICROWAVE DIGESTION Yayah Rodiana; Siti Masitoh; Hafiz Maulana; Nurhasni Nurhasni
Jurnal Ecolab Vol 7, No 2 (2013): Jurnal Ecolab
Publisher : Pusat Standardisasi Instrumen Kualitas Lingkungan Hidup Laboratorium Lingkungan (P3KLL)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jklh.2013.7.2.71-80

Abstract

Destruksi asam tertutup atau disebut juga microwave digestion merupakan metode destruksi basah yang paling direkomendasikan untuk analisis logam berat. Kelebihan dari metode ini diantaranya adalah tidak ada unsur-unsur volatile yang hilang dan waktu pengerjaannya cukup singkat (20-40 menit) dibandingkan dengan destruksi asam terbuka yang membutuhkan waktu lebih lama (lebih dari 24 jam). Contoh uji yang digunakan dalam penelitian ini adalah sedimen dari Certified Reference Material (CRM). Sebanyak 0,5 gram contoh uji ditimbang kemudian ditambahkan dengan asam HNO3 dan selanjutnya didestruksi menggunakan microwave digestion. Larutan hasil destruksi kemudian diukur konsentrasi logamnya dengan menggunakan Spektrofotometer Serapan Atom (SSA). Validasi metode dilakukan terhdap hasil pengukuran total logam kadmium (Cd) , tembaga (Cu) , mangan (Mn) dan seng (Zn) meliputi linearitas, limit deteksi , akurasi dan presisi . Hasil penelitian menunjukkan penggunaan metode microwave digestion dengan penambahan HN03 untuk analisis logam berat telah memenuhi semua persyaratan keberterimaan suatu metode untuk digunakan dalam analisis di laboratorium
Co-Authors Daam Settachan Hafiz Maulana Jerry Diamond Nurhasni Nurhasni Siti Masitoh Thundorn Saneanukul