7 research outputs found
Fitoremediasi Zn Dari Limbah Cair Pabrik Pengolahan Karet Dengan Pemanfaatan Pistia Stratiotes L.
No full textRubber processing factory is one of big industries in Riau and potentially produce heavy metal such as Zn. The continuous factory activity will produce high level of Zn in liquid waste and cause the contamination of aquatic environment. One of the alternative efforts to overcome this effect is using phytoremediation. P. stratiotes that is known as a plant that may accumulate metals (Pb, Cd, Cr and Zn) at high concentration. This research aimed to test the ability of the growth of P. stratiotes and the ability of P. stratiotes in reducing the content of Zn in liquid waste of rubber processing factory. The research used Complete Random Design. P. stratiotes was grown for 20 days in liquid waste of rubber processing factory with the concentrations were 5, 10, 15, 20, 25% and without the liquid waste as a control (0%). Each concentration had 3 replications. Parameters observed were fresh weight gain and relative growth rate of P. stratiotes. Data was analyzed using ANOVA and LSD at the level of 5%. The results showed that the fresh weight P. stratiotes increased up to 33.65 g in the concentration of 25%. The highest relative growth was found in 5thday for all concentrations and control
Facile synthesis of hydroxyapatite particles from cockle shells (Anadaragranosa) by hydrothermal method
No full textHydroxyapatite particles, Ca10(PO4)6(OH)2, (HAp), have been successfully synthesized by hydrothermal method using cockle shells (Anadaragranosa) waste as the starting material. The cockle shells were calcined, hydrated (slaking) and undergone carbonation to form precipitated calcium carbonate (PCC). The PCC was added with (NH4)2HPO4 to form HAp by varying the temperatures and reaction times under basic condition (pH 10-11). The X-ray Diffraction (XRD) patterns revealed that the excellent product of HAp with hexagonal crystal structure can obtained via facile hydrothermal procedure (140 ° C for 16 h). Fourier transform infrared spectroscopy (FTIR) spectra analyses showed the presence of OH, HPO4 2-, and PO4 3- absorption bands, indicating the formation of HAp. The dried HAp particles powder was extremely pure with a specific surface area of 17.8 m2/g
Sintesis Natrium Silikat Menggunakan Silika dari Pasir Pantai Bengkalis
No full textSodium silicate (Na2SiO3) is a chemical industrial material that is widely used as a metal cleaner, adhesive, and as a filler in the detergent, soap and toothpaste industries. Sodium silicate can be synthesized from silica dioxide (SiO2), which can be obtained through an extraction process from materials containing silica such as sand, glass bottle waste or rice husks. In this research, the synthesis of Na2SiO3 was carried out using silica extracted from Bengkalis beach sand using the acid leaching method, with a 3M HCl solution. The results of X-ray fluorescence (XRF) analysis of Bengkalis Beach sand showed that the silica content reached 89.1%. This research aims to determine the effect of the molar ratio of the NaOH reactant to the extracted SiO2 (2:1, 3:1 and 4:1) on the Na2SiO3 produced. The synthesis of Na2SiO3 was carried out using the hydrothermal method at atmospheric pressure, by reacting a 4M NaOH solution with 10 g of silica from Bengkalis sand, by heating at 110oC for an hour and stirring at 600 rpm. A molar ratio of 2:1 is the best ratio which produces 9.427g of Na2SiO3. From analysis using Fourier Transform Infrared (FTIR) spectroscopy, the spectrum patterns obtained are suitable for compounds containing silanol (≡Si-OH) and siloxane (≡Si-O-Si≡) groups. The X-ray diffraction (XRD) pattern of the synthesized compound is in accordance with standard sodium silicate. The Na2SiO3 obtained has a crystal diameter of 44.8 nm with an agglomerate-shaped morpology
Sintesis Hidroksiapatit dari Precipitated Calcium Carbonate (PCC) Kulit Telur Ayam melalui Proses Hidrotermal
No full textHydroxyapatite Ca10(PO4)6(OH)2 is a calcium phosphate compound which is bioactive ceramic material with high bioafinitas and the principal inorganic constituent of bones and teeth. Hydroxyapatite (HAp) materials used as bone implants, adsorbents and catalysts. In this research synthesis of hydroxyapatite can be made by using material which is rich of CaCO3 like PCC chicken's egg shell with a composition of 99,45% CaCO3. PCC chicken's egg shell which has calcium source was synthesized to HAp by hydrothermal process with varied of ratio Ca/P (1,57;1,67;1,77) and reaction temperature (140oC, 160oC, 180oC). HAp synthesized result has been analyzed using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The results of FTIR analysis, synthesis of HAp with hydrothermal method through precipitated calcium carbonat (PCC) showed the formation of hydroxyapatite in the presence of peaks PO43- dan OH-. The highest peak is obtained at reaction temperature 140oC with ratio Ca/P 1,57 and reaction temperature 160oC with ratio Ca/P 1,67. XRD diffraction results in hydroxyapatite get the highest purity obtained at temperature of 160oC at ratio 1,67 with a hexagonal crystal structures. The results of SEM-EDX analysis, show that the morphological form of agglomerates or clumping . The molar ratio of Ca/ P of hydroxyapatite which is made from chicken's egg shell through the PCC is 1,69
Exploring the potential of fermented papaya as a functional ingredient for sourdough bread: a study on fermentation time and quality of sourdough donuts
No full textSourdough bread is known to have health benefits due to its fermentation process using lactic acid and wild yeast. It can improve the taste, texture, shelf life, and nutritional content of bread as a functional food. In this study, sourdough was made from fermented papaya with varying fermentation times of 4, 5, and 6 days. The substrate was fed five times to strengthen the sourdough, resulting in a robust enough mixture to develop the dough. The resulting sourdough was used to create sourdough bread with a 30% sourdough concentration. The fermentation time impacted the quality of the sourdough, with results showing that sourdough became increasingly active as fermentation time progressed. The best sourdough was obtained from a six-day fermentation period, with a pH of 3.60 and a total plate count of 1.70 × 104 CFU/ml. The best donuts were produced using the sourdough that had been fermented for six days, with an almost perfect score of 3.9 out of 4 for all aspects, including color, aroma, taste, and texture. Using this sourdough resulted in a significantly longer shelf life; no mold appeared until the eighth day of storage at room temperature. The moisture content of the donuts was measured at 4.57%. This study demonstrates the potential benefits of using sourdough made from fermented papaya to improve the quality and shelf life of sourdough bread while also providing potential health benefits
PENINGKATAN PENGETAHUAN MANAJEMEN KEUANGAN DAN MOTIVASI BISNIS UNTUK IBU RUMAH TANGGA DI DESA KUALU KECAMATAN TAMBANG KABUPATEN KAMPAR
No full textPandemi COVID-19 menyisakan ketidakstabilan ekonomi pada masyarakat. Harga bahan kebutuhan pokok yang masih tinggi, membuat para ibu rumah tangga harus berpikir keras untuk mengelola keuangan keluarga. Hal ini dialami oleh beberapa ibu rumah tangga di lingkungan Perumahan Mutiara Ayu 8 Desa Kualu Kecamatan Tambang Kabupaten Kampar. Kegiatan ini dilakukan untuk meningkatkan pengetahuan para ibu rumah tangga dalam manajemen keuangan keluarga dan memberikan motivasi bisnis untuk menambah pendapatan keluarga. Metode yang dilakukan adalah observasi lapangan, melaksanakan penyuluhan tentang manajemen keuangan dan motivasi bisnis, dan evaluasi hasil kegiatan terhadap 20 orang ibu rumah tangga. Manajemen keuangan keluarga yang efektif dapat dilakukan dengan cara membedakan kebutuhan dengan keinginan, menyusun daftar pengeluaran prioritas per bulan, alokasikan dana untuk tabungan dan dana darurat, dan minimalisir hutang. Untuk menambah pendapatan keluarga, ibu rumah tangga dapat melakukan bisnis sendiri. Hal-hal yang perlu dipersiapkan untuk memulai bisnis adalah adanya dukungan keluarga, sesuaikan dengan kemampuan, dapat memisahkan antara keluarga dan bisnis, menyusun target, dan perluas jaringan. Hasil kegiatan ini menunjukkan adanya peningkatan pengetahuan tentang manajemen keuangan dan bisnis pada para peserta
Synthesis and Characterization of Hydroxyapatite from Duck Eggshell by Wet Precipitation Process
No full textHydroxyapatite (HAp, Ca10(PO4)6(OH)2) is the most stable form of calcium phosphate and widely used in various medical applications, mainly in orthopedics and dentistry due to its close similarities with the inorganic mineral component of bone and teeth. This study aims to synthesize hydroxyapatite from duck eggshell using the precipitation method. The duck eggshell was calcined, hydrated (slaking) and underwent carbonation to form Precipitated Calcium Carbonate (PCC). Afterwards, (NH4)2HPO4 was added to produce HAp by varying the molar ratio of Ca/P by 1.67, 1.77 and 1.87 and stirring speed by 200, 250, 300rpm under basic condition (pH 10 – 11). The best results were obtained at a molar ratio of 1.77 with 200rpm stirring speed. Furthermore, the X-ray Diffraction (XRD) analysis showed that its crystals were hexagonal with sizes of 23.062nm, in the absence of other crystalline phases. Therefore, the hydroxyapatite was obtained in the agglomerates form with a specific surface area of ??55.929m2/g
