Penggunaan Kitosan Sebagai Koagulan Alami Dalam Perbaikan Kualitas Air Danau

Treatment of groundwater and surface water is still dirty often done using synthetic coagulant poly aluminum Cloride (PAC). In fact, its use may pose a risk to health and more expensive. This study was conducted to see the effect of chitosan from shrimp shell waste as a natural coagulant coagulant synthetic substitute. Chitosan at a concentration of 20 ppm lower the lake water turbidity of 94.43%, lowering the pH, decreases the amount of bacteria ± 99.18%. Lower levels of dissolved metals in the water of the lake, such as manganese, magnesium and iron. Chitosan does not change tempeatur lake water and water treatment results. Chitosan not lower BOD value and not lower levels of calcium. DOI :http://dx.doi.org/10.15408/jkv.v0i0.314

Penggunaan Biji Asam Jawa (Tamarindus Indica L.) Dan Biji Kecipir (Psophocarpus Tetragonolobus L.) Sebagai Koagulan Alami Dalam Perbaikan Kualitas Air Tanah

Penggunaan Biji Asam Jawa (Tamarindus indica L.) dan Biji Kecipir (Psophocarpus tetragonolobus L.) Sebagai Koagulan Alami dalam Perbaikan Kualitas Air Tanah telah dilakukan. Penelitian bertujuan untuk mengetahui kemampuan serbuk biji asam jawa dan biji kecipir sebagai biokoagulan untuk memperbaiki kualitas air dan pengaruhnya terhadap parameter kualitas air, yang meliputi: temperatur, pH, konduktivitas, kekeruhan, oksigen terlarut, kandungan logam berat, dan total koliform. Hasil jar test diperoleh dosis optimum 0,009% (penurunan turbiditas 99,72%) untuk biji asam jawa dan 0,03% (penurunan turbiditas 92,03%) untuk ekstrak biji kecipir. Nilai pH optimum diperoleh pada pH 3 untuk kedua jenis biokoagulan. Penggunaan ekstrak biji asam jawa dan biji kecipir dan tidak memberikan pengaruh yang berarti terhadap parameter temperatur, pH, konduktivitas,dan logam berat. Penggunaan ekstrak biji kecipir dan biji asam jawa tidak menurunkan angka BOD. Ekstrak biji asam jawa mampu menurunkan angka total koliform sedangkan ekstrak biji kecipir tidak efektif dalam menurunkan angka total koliform. Kata Kunci: Koagulasi, Asam jawa (Tamarindus indica L.), Kecipir (Psophocarpus tetragonolobus L.), Jar test, Air tanah, MPN.Abstrack The Use of Tamarind Seeds (Tamarindus indica L.) and Winged Bean Seeds (Psophocarpus tetragonolobus L.) As Natural Coagulant in Groundwater Quality Improvementhas been done. The aims of this study is to determine the ability of tamarind seeds and winged bean seeds as biocoagulant to improve water quality and its effect on water quality parameters, which include: temperature, pH, conductivity, turbidity, dissolved oxygen, heavy metal content, and total coliform. Jar test results obtained optimum dose of 0.009% (99.72% reduction in turbidity) to tamarind seeds and 0.03% (92.03% reduction in turbidity) to winged bean seeds. The optimum pH obtained at pH 3 for both types of biocoagulant. The use of tamarind seeds and winged bean seeds does not have much influence on the parameters of temperature, pH, conductivity, and heavy metals. They also did not reduce the number of BOD. Tamarind seeds reduce the number of total coliform while winged bean seeds are not effective in reducing the number of total coliform

Sekam Padi Untuk Menyerap Ion Logam Tembaga Dan Timbal Dalam Air Limbah

This research aims to rice huskas absorbent of copper and lead metalions in the waste water. The method used is a static method (batch). Determination of optimum conditions includes adsorbent mass, pH, absorbate concentration and duration of heating. The analysis using Atomic Absorption Spectrophotometer (AAS) showed the highest absorption efficiency of Pb metal ion in multicomponent wastewater reached 99,38%. The analysis of wastewater from chemistry laboratorium UIN Syarif Hidayatullah Jakarta showed, the highest absorption of Cu metal ion was 78,57%

Pengkajian Metode Untuk Analisis Total Logam Berat Dalam Sedimen Menggunakan Microwave Digestion

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 laboratoriu

Nitric oxide-releasing poly(lactic-co-glycolic acid)-polyethylenimine nanoparticles for prolonged nitric oxide release, antibacterial efficacy, and in vivo wound healing activity

Hasan Nurhasni,1 Jiafu Cao,1 Moonjeong Choi,1 Il Kim,2 Bok Luel Lee,1 Yunjin Jung,1 Jin-Wook Yoo11College of Pharmacy, Pusan National University, Busan, South Korea; 2Department of Polymer Science and Engineering, Pusan National University, Busan, South KoreaAbstract: Nitric oxide (NO)-releasing nanoparticles (NPs) have emerged as a wound healing enhancer and a novel antibacterial agent that can circumvent antibiotic resistance. However, the NO release from NPs over extended periods of time is still inadequate for clinical application. In this study, we developed NO-releasing poly(lactic-co-glycolic acid)-polyethylenimine (PEI) NPs (NO/PPNPs) composed of poly(lactic-co-glycolic acid) and PEI/diazeniumdiolate (PEI/NONOate) for prolonged NO release, antibacterial efficacy, and wound healing activity. Successful preparation of PEI/NONOate was confirmed by proton nuclear magnetic resonance, Fourier transform infrared spectroscopy, and ultraviolet/visible spectrophotometry. NO/PPNPs were characterized by particle size, surface charge, and NO loading. The NO/PPNPs showed a prolonged NO release profile over 6 days without any burst release. The NO/PPNPs exhibited potent bactericidal efficacy against methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa concentration-dependently and showed the ability to bind on the surface of the bacteria. We also found that the NO released from the NO/PPNPs mediates bactericidal efficacy and is not toxic to healthy fibroblast cells. Furthermore, NO/PPNPs accelerated wound healing and epithelialization in a mouse model of a MRSA-infected wound. Therefore, our results suggest that the NO/PPNPs presented in this study could be a suitable approach for treating wounds and various skin infections.Keywords: nitric oxide-releasing nanoparticles, PLGA, PEI, antimicrobial, wound healin