KAJIAN METODE KOAGULASI PADA PENGOLAHAN AIR SUMUR MENGANDUNG TIMBAL BERVALENSI II DI KOTA PASURUAN

Abstract

One of the major needs in human life is water. Some communities in the town of Pasuruan still use well water for cooking and drinking. Based on previous studies it is known that five samples of well water in the town of Pasuruan containing Pb above the maximum limit water requirements based on Regulation of the Minister of Health Nomor 416/MENKES/PER/IX/1990. One of simple method that can reduce the content of Pb metal in water is coagulation. The purposes of this research are: 1) to get some kinds of coagulants which could reduce Pb metal; 2) to obtain a coagulant efficiency; 3) to recommend coagulant which can be used to process well water containing Pb. This research was using quantitative descriptive technique by collecting data from the study of literature. The research is done in four stages: 1) looked for the laboraturium analysis result of well water samples; 2) comparing the results of the analysis to the requirements of clean water; 3) looking coagulant that can be used to reduce the content of Pb in water; 4) assessed the efficiency of coagulants. The results showed that: 1) the coagulants that can be used to reduce the content of Pb are: a) sea water; b) Moringa seed powder; c) powdered activated hyacinth 2%; d) alum 20 mg / L and 1250 mg / L; e) FeCl3; 2) the efficiency of coagulant sea water reached 95.5%, Moringa seed powder reaches 95.6%, powder activated hyacinth reached 96%; alum 20 mg / L reached 36%, alum 1250 mg / L at 67%; FeCl3 reached 84%; 3) The coagulants that can be used to process five sample wells are seawater, Moringa seed powder, powdered activated hyacinth 2% NaOH, dan FeCl3 1000 mg/L.