Measurement of water polluted quality based on turbidity, pH, magnetic property, and dissolved solid

Abstract

A device of polluted water measurement based on turbidity, pH, dissolved Solids, and magnetic field parameters, has been developed. The device consists of three light dependent resistor (LDR) sensors as turbidity detector, conductivity sensor as total dissolved solids (TDS) detector, SKUSEN0161 pH sensor as pH detector, Hall Effect magnetic sensor as a magnetic field detector and Arduino as a control system. Each sensor has been characterized using a standard measuring instrument to determine sensor sensitivity. Sensitivity of the LDR sensor are 102.64 NTU/V, 117.53 NTU/V, and 126.394 NTU/V. Meanwhile, sensitivity of conductivity sensor is 102.5 ppm/V, pH sensor is 3.5069 pH/V, and Hall Effect sensor is 303.21 Gauss/V. The samples used in prototype trials are polluted water samples, magnetized water sample, and artificial waste sample. The magnetized solution sample used in pH observation are acidic water, turbid river water, and alkaline water. Meanwhile, the magnetized solution sample used in TDS & turbidity observation is river water contaminated by household wastes. The results show there is a correlation between the four parameters. By applying the magnetic field in a certain time interval, the turbidity and TDS of the sample decrease, in the contrary the pH value of the sample increases.