Rhodamine B is one of the dyes that is widely used in the textile industry. However, the rhodamine B waste produced is dangerous for the environment. So, it must be treated propely. Adsorption is a simple method that can be used in waste water treatmen. In the present study, the adsorbent used is 4-hydroxy-3-methoxyphenylcalix[4]resorcinarene (CHMFKR) which is synthesis from vanillin and resorcinol. The yield of product was synthesis is 85.707%. The removal of rhodamine B by calix[4]resorcinarene was investigated in the present study. Adsorption studies were performed by batch experiments. The effect of contact time, pH, initial dye concentration was explored. The optimum conditions at contac time 75 minutes and pH 7. The adsorption kinetics of rhodamine B using calix[4]resorcinarene followed second pseudo order. The isotherm study showed that adsorption rhodamine B using 4-hydroxy-3-methoxycalix[4]resorcinarene followed Freundlich isotherm with adsorption energy of -33598.02 J/mol, kf value 1.29 x 10−6 L/mol and qmaks 6.157 mg/g.
The pristine cryptomelane (OMS-2) and Fe-OMS-2 (1%, 5%, and 10%) have been successfully synthesized by a one-step sol-gel method and characterized by XRD, SEM, BET surface area and AAS. The incorporation of Fe (III) within the structure of OMS-2 leads to an increase in surface area, pore-volume, and catalytic activity for the degradation of methylene blue (MB) and a decrease in the content of K+ and average of pore diameter. The catalytic test indicated that the catalytic activity of Fe-OMS-2 1% is considerably higher that of pure OMS-2. The highest degradation of MB is 93.5% achieved using Fe-OMS-2 1% after 120 minutes of degradation time, the initial concentration of MB of 20 ppm, the catalyst concentration of 0.125 mg and the H2O2 volume of 15 mL. The enhanced catalytic activities of Fe-OMS-2 compared to pristine OMS-2 for catalytic degradation of MB are associated with an increase in surface area, pore-volume, and smaller particle size. The results from catalytic studies imply that the metal doping is an effective strategy to enhance the catalytic activities of OMS-2 for degradation of MB.
The conversion of palm oil into biofuel is continuing interest in a green alternative fuel. Catalytic hydrocracking palm oil into biofuels was carried out by NiMoO4/activated carbon catalyst. The catalyst was first designed from nanoparticle NiO–MoO3 supported by activated carbon from palm kernel shell and characterized using X-ray crystallography, Fourier transform infrared, and scanning electron microscope with energy dispersive X-ray. The efficiency of the catalyst was evaluated for the conversion of palm oil into biogasoline and kerosene using the hydrocracking process at different temperatures (150, 250, and 350°C). The resulting catalytic hydrocracking is liquid biofuels, which is analyzed using GC–MC to determine its fractions: biogasoline (C5–C10) and kerosine (C11–C16). The optimum condition of catalytic hydrocracking was obtained at a temperature of 150°C resulting in two primary fractions classified into biogasoline (37.83%) consisting of n-nonane (C9) and 1-heptene (C7) and kerosine (61.34%) consisting of three primary fractions, n-pentadecane (C15), hexadecene (C16), and 1-undecene (C11). The result of this study proved that the NiMoO4/activated carbon catalyst plays an important role in catalytic hydrocracking and becomes a promising alternative catalyst for the preparation of biofuels.
Virus covid 19 telah menyebabkan tingkat pertumbuhan perekonomian Indonesia turun drastis atau berjalan sangat lambat. Hal ini di sebabkan oleh banyaknya tenaga kerja yang di rumahkan dan bahkan berhentikan sehingga minat jual dan beli kurang, tingkat pengangguran naik dan bahkan dapat menimbulkan peningkatan kriminalitas. Permasalahan ini harus segera di carikan solusi supaya tingkat kemiskinan tidak bertambah. Salah satu metoda yang di lakukan adalah pemberdayaan masyarakat untuk meningkatkan perekonomia yaitu dengan beternak bebek pedaging (mentok) dan bebek petelur dihalaman rumah. Mentok dan bebek petelur merupakan makanan yang banyak di gemari oleh masyarakat Yogyakarta karena banyak mengandung protein dan vitamin. Hal ini merupakan suatu peluang besar untuk pemberdayaan masyarakat dalam meningkatkan tingkat perekonomian. Program pemberdayaan ini dilakukan dengan kerjasama antara Direktorat Penelitian dan Pengabdian kepada Masyarakat Universitas Islam Indonesia (DPPM UII) dan Masyarakat mitra sebagai target program Pengabdian Kepada Masyarakat (PkM). Pemilihan mitra berdasarkan hasil survei yaitu Dusun Pandanpuro, Sleman, Yogyakarta. Program ini telah memberikan hasil yang sangat baik dimana Dusun Pandanpuro telah memiliki 2 (dua) mesin penetas telur dengan kapasitas masing masing 40 butir, peralatan pencacah sayuran dan buku panduan beternak serta menajemen kewirausahaan Tingkat keberhasilan mesin penetas telur mencapai 80 persen sehingga selama pengabdian masyarakat target telah memiliki rata-rata 32 ekor mentok atau bebek petelur. Untuk keberlanjutan program ini maka mesin penetas telur di gilir kemasyarakat lain yang dikendalikan oleh ketua kelompok tani
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.