Pemecahan (Splitting) Molekul Air Menjadi Gas H2dan O2 Melalui Proses Fotovoltaik

Abstract

One method to overcome the scarcity of alternative sources of energy on earth is through the development of photovoltaic cells. This method used a solar energy to electrical energy transformation. In this research, breaking (splitting) of water molecules into H 2 and O 2 gas by the photovoltaic process uses electrodes CuO/C with Na 2 SO 4 electrolyte. In this process used 2 photovoltaic cells as electricity producing and U-shaped electrolysis cell for solver (splitting) of water molecule produce H 2 and O 2 gas. CuO electrode (anode) is made through the burning of copper rod in a furnace at temperature 400 o C with a variety of combustion 1, 3, 4 times each lasting for 1 hs, while the cathode in the form of carbon rods obtained from 2B pencil. The optimum conditions for Na 2 SO 4 electrolyte concentration is 0.8 N and for CuO electrodes with 3x burning. Optimum efficiency photovoltaic process was 2.66%. H 2 and O 2 gas volume obtained near stoichiometric ratio is 2 : 1.

Groundwater quality analysis using water quality index in Wonosari basin, Gunungkidul regency-Indonesia

“…Human activities that generate industrial, domestic, and agricultural wastes substantially affect the presence of iron in water[17]. Large amounts of heavy metals leached out of landfills into the environment contaminate underground or downstream water systems[18].Per Regulation No. 32 of 2017, the water quality standard for iron concentration is set at 1 mg/l.…”