Layanan Penerapan Karbon Aktif Sebagai Media Penyaring Air di Lingkungan SMA Negeri 4 Jayapura

Activated charcoal can be used as filter for water contaminant and also heavy metals absorbance. The aims of this action were to provide information and introduce the application of activated charcoal as a filter media for contaminated water. This activity was conducted at SMA Negeri 4 Jayapura by using seminar method for sharing the information. The output of this activity can be seen from the understanding of participants regarding the basic knowledge and also the use of activated charcoal for several functions.Keyword: fresh water; activated charcoal; water filter.

Profil dan Karakteristik Mineral Nikel Laterit di Daerah Angkasapura, Kota Jayapura, Papua, Indonesia

Bijih Nikel merupakan bahan alam yang banyak digunakan dalam bidang perindustrian yang mempunyai sifat tahan karat. Daerah Angkasapura Jayapura termasuk dalam wilayah pengunungan Cycloop dengan berbagai jenis batuan. Tujuan dari penelitian ini adalah untuk menentukan profil nikel laterit, komposisi mineral nikel laterit, struktur senyawa mineral nikel laterit dan morfologi permukaan nikel laterit di daerah Angkasapura. Penelitian dilakukan dengan menggunakan metode geolistrik resistivitas konfigurasi Schlumberger. Hasil penelitian menunjukkan bahwa profil nikel laterit yang tersebar pada 3 titik pengukuran yang diidentifikasi dengan metode geolistrik terdiri dari 4 jenis lapisan dengan nilai resistivitas 1,96–362,0  untuk lapisan limonit, 404,0–417,0  untuk lapisan saprolit, 661,0–929,0  untuk lapisan saprock dan 1977,0–3822,0   untuk lapisan bedrock. Persentase unsur Nikel pada sampel nikel laterit pada 4 jenis lapisan yaitu 0,51% pada lapisan top soil, 1,32% pada lapisan red limonit, 1,40% pada lapisan yellow limonit dan 15,3% pada lapisan saprock. Hasil penelitian menunjukkan bahwa nikel laterit yang tersebar di daerah Angkasapura Jayapura, Papua berpotensi sebagai sumber tambang Nikel

Identification of surface functional group on activated carbon from waste sago

Activated carbon is a powerful adsorption material which mainly used as pollutants adsorption. The adsorption properties own derived from the main functional groups or chemical atoms derived from the activation processes. In this study, the activated carbon was prepared from waste sago and activated using two different chemicals activation agents called phosphoric acid and potassium hydroxide. The aim of this study was to identify the surface functional group on waste sago activated carbon produced. The results showed that activated carbon with phosphoric acid activator contained OH, C=C, CO and CH functional groups, while activated carbon with potassium hydroxide activator contained O-H, C≡C, C=C, C-O and C-H functional groups. These results lead to support the recommendations for the development of the application of waste sago activated carbon made as adsorbents in the purification of lead (II) and cadmium (II) wastewater

The Effect of Chemical Activating Agent on the Properties of Activated Carbon from Sago Waste

The effect of chemical activators on the properties of activated carbon from sago waste was conducted in this study by using ZnCl2, H3PO4, KOH, and KMnO4 chemical solutions. The carbonized sago waste was added to each chemical solution, boiled at 85 °C for 4 h, and heated at 600 °C for 3 h. The porosity, microstructural, proximate, and surface chemistry analyses were carried out using nitrogen adsorption with employing the Brunauer Emmett Teller (BET) method and the Barret-Joyner-Halenda (BJH) calculation, scanning electron microscopy by using energy dispersive spectroscopy, X-ray diffractometer, simultaneous thermogravimetric analysis system, and the Fourier-transform infrared spectroscopy. The results showed that the activated carbon prepared using ZnCl2 acid had the highest specific surface area of 546.61 m2/g, while the KOH activating agent surpassed other chemicals in terms of a refined structure and morphology, with the lowest ash content of 10.90%. The surface chemistry study revealed that ZnCl2 and KOH activated carbon showed phenol and carboxylate groups. Hence, ZnCl2 acid was suggested as activating agents for micropore carbon, while KOH was favorable to producing a mesopore-activated carbon from sago waste

The Effect of Chemical Activating Agent on the Properties of Activated Carbon from Sago Waste

The effect of chemical activators on the properties of activated carbon from sago waste was conducted in this study by using ZnCl2, H3PO4, KOH, and KMnO4 chemical solutions. The carbonized sago waste was added to each chemical solution, boiled at 85 °C for 4 h, and heated at 600 °C for 3 h. The porosity, microstructural, proximate, and surface chemistry analyses were carried out using nitrogen adsorption with employing the Brunauer Emmett Teller (BET) method and the Barret-Joyner-Halenda (BJH) calculation, scanning electron microscopy by using energy dispersive spectroscopy, X-ray diffractometer, simultaneous thermogravimetric analysis system, and the Fourier-transform infrared spectroscopy. The results showed that the activated carbon prepared using ZnCl2 acid had the highest specific surface area of 546.61 m2/g, while the KOH activating agent surpassed other chemicals in terms of a refined structure and morphology, with the lowest ash content of 10.90%. The surface chemistry study revealed that ZnCl2 and KOH activated carbon showed phenol and carboxylate groups. Hence, ZnCl2 acid was suggested as activating agents for micropore carbon, while KOH was favorable to producing a mesopore-activated carbon from sago waste