wilayah pesisir yang banyak ditumbuhi tanaman nipah, sehingga menjadikannya sebagai salah satu kekayaan alam lokal yang potensial untuk dimanfaatkan. Pemanfaatan tanaman ini telah dilakukan untuk bidang pangan, energi, sandang, farmasi, dan perabotan akan tetapi sebagai bahan pembuat anoda baterai lithium-ion masih baru diteliti. Studi mengenai baterai lithium-ion di Indonesia khususnya belum lama dimulai sehingga penelitian di bidang ini masih terbatas dan sedikit jumlahnya, namun pengembangan baterai lithium-ion telah menjadi salah satu prioritas riset bidang sumber energi baru terbarukan sebagaimana tertuang dalam masterplan riset nasional Indonesia (RIRN) periode tahun 2017 -2045. Penelitian ini dilakukan untuk meneliti potensi kelayakan tempurung nipah sebagai bahan anoda baterai lithium-ion. Parameter uji kelayakan yang dikaji dalam penelitian ini meliputi kadar air, kadar abu serta kemampuan adsorpsi yang dinyatakan dalam bilangan iodin dan methylene blue yang merupakan karakterisasi dasar untuk arang aktif yang mengacu pada SNI 06-3730-1995. Proses karbonisasi tempurung nipah dijalankan dengan adanya oksigen pada suhu hasil optimasi yakni sebesar 210 o C dengan variasi interval waktu 1 jam mulai dari 3 sampai 8 jam kemudian diikuti proses aktivasi menggunakan asam kuat yakni HCl dengan konsentrasi 2 M. Hasil eksperimen menunjukkan nilai rata-rata dari kadar air, kadar abu, bilangan iodin, dan methylene blue secara berturut-turut adalah 12,5%; 1,75%; 2515,9161 mg/g; dan 97% yang seluruhnya di atas nilai standar baku mutu sehingga kesimpulan dari penelitian ini adalah arang aktif dari tempurung nipah memiliki karakteristik dasar yang potensial untuk dikembangkan lebih lanjut termasuk sebagai bahan baku anoda baterai lithium-ion.
Buildings to achieve sustainable development must meet environmental criteria. This environmentally friendly building design is often referred to as a green building. The Green Building concept aims to reduce the negative impact on the environment from the construction and utilization of buildings. This study will discuss the criteria and requirements that must be met by company buildings to be categorized as Green Buildings according to the Green Building Council Indonesia (GBCI) and obtain a Greenship certificate, as well as any components at the construction and maintenance stage that affect the fulfillment of these requirements. This study uses a quantitative method by the green ship standard version 1.1. The greens criteria assessment in Building A resulted in 51 points. The results of this assessment explain that Building A is included in the silver category. This result explains that 44% of Building A's facilities have met the green building criteria. Upgrading from silver to gold category needs to increase 7 points by adding facilities, standard operating procedures, and policies.
Wastewater resulted from the batik dying process is known for its environmentally hazardous substances including hazardous natural and synthetic organic matter, suspended particles, and hazardous metal. But in the micro and medium scale batik textile business, wastewater treatment is mostly not carried because it does not give benefit for the owner. Economical wastewater treatment constructions can be an alternative for the business owner for their free operational cost. Batik wastewater treatment ought to be carried out to meet government standards but most importantly to decrease hazardous pollutant’s concentrations so it does not harm the environment. This society service project aims to provide alternatively economical wastewater treatment for batik business owners by applying simples and cheapest yet effective treatment methods to reduce pollutant concentrations in wastewater. Methods applied in this project including sedimentation, filtration, and landfill-bioremediation. The laboratorium analysis result shows that sedimentation and filtration are significantly reduced total suspended solid particles in wastewater from 2450 to 100 mg/L in line with wastewater decoloring from dark blue to clear yellow.
ABSTRAK Industri pengolahan ikan memegang peranan penting dalam perekonomian Cilacap namun disisi lain industri ini juga menyumbangkan dampak negatif terhadap kualitas udara lingkungan karena menghasilkan bau yang mengganggu. Bau tersebut berasal dari limbah atau sisa pengolahan ikan yang tidak dikelola dengan baik. Salah satu gas penyebab bau tersebut adalah gas hidrogen sulfida (H2S) yang dihasilkan dari proses penguraian protein didalam limbah ikan. Limbah ikan yang dibuang begitu saja dapat menjadikan bibit penyakit bagi masyarakat yang disebabkan dari gas H2S karena terjadi proses penguraian protein didalam limbah ikan. Penelitian ini bertujuan untuk menguji kemampuan karbon aktif dari tempurung nipah dalam menjerap gas H2S yang terkandung dalam limbah ikan dalam besaran penurunan konsentrasi H2S Δ𝐶 dan dengan variabel berupa jumlah adsorben 20, 30, dan 40 gram. Gas H2S dari limbah ikan diadsorpsi menggunakan karbon aktif dari tempurung buah nipah teraktivasi NaOH dalam suatu rangkaian alat adsorpsi dengan kolom berisi karbon aktif dan dilengkapi dengan kolom larutan penjerap gas limbah ikan yakni larutan kadmium asetat di bagian sebelum dam setelah kolom adsorpsi. Penentuan konsentrasi gas H2S yang terjerap dalam karbon aktif dilakukan dengan metode titrimetri yakni titrasi iodometri pada larutan kadmium asetat. Hasil penelitian menunjukkan penurunan kadar H2S pada limbah ikan dengan jumlah adsorben 20, 30, dan 40 gram masing-masing adalah 33,497 ppm (71,15%), 33,452 ppm (71,05%), dan 34,381 ppm (73,03%). ABSTRACTThe fish processing industry plays an important role in the Cilacap economy, but on the other hand this also contributes negatively to environmental air quality because it produces a disturbing odor. The smell comes from waste or fish processing residue that is not managed properly. One of the gases that causes the odor is hydrogen sulfide (H2S) gas which is produced from protein decomposition process in fish waste. Fish waste that is thrown away can cause disease for the community caused by H2S gas because there is a process of protein decomposition in fish waste. This study aims to test the ability of activated carbon from nipah shells to absorb H2S gas contained in fish waste in the parameter amount of decreasing H2S concentration (ΔC) and with variables amount of adsorbent which are 20, 30, and 40 grams. H2S gas from fish waste is adsorbed using activated carbon from NaOH activated nipah shell in a series of adsorption devices with a column containing activated carbon and equipped with a column of fish waste gas absorbing solution, namely cadmium acetate solution in the section before and after the adsorption column. Determination of the concentration of H2S gas adsorbed in activated carbon was by the titrimetric method, namely iodometric titration in cadmium acetate solution. The results showed a decrease in H2S levels in fish waste with adsorbents of 20, 30, and 40 grams respectively 33,497 ppm (71.15%), 33,452 ppm (71.05%), and 34.381 ppm (73.03%) .
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