Application of electrical resistivity method to analyze liquid waste pollution in Linggar Village, Rancaekek, West Java, Indonesia

摘要

One area that has developed into a textile industry region is Linggar Village, Rancaekek, West Java. The development of this industry has advantages and disadvantages. On the one hand, industrial development can reduce unemployment and improve the welfare of the community around the industry area. On the other hand, this industrial development can also reduce the quality of the environment, especially if the Wastewater Treatment Plant (WWTP) does not work optimally. If the WWTP does not work, there will be liquid waste wasted into rivers and infiltrate into the ground, so we need the information about the distribution of liquid waste in the soil. The purpose of this study is to determine the condition of the soil and the presence of groundwater contaminated by the liquid waste in Linggar Village using the 2D electrical resistivity method by using Wenner configuration. It also determines the distribution of surface water contaminated by liquid waste using in situ sample measurement method. The acquisition of electrical resistivity data has been carried out around the Cikijing and Cimande Rivers in 4 lines. The length of the first, second, third, and fourth lines respectively are 532.5 m, 232.5 m, 155 m, and 155 m; also, electrode spacing is 7.5 m, 7.5 m, 5.0 m, and 5.0 m. The resistivity values based on measurement results vary from 1.76 to 133 Οm. This value is associated with clay which consists of soft and medium to rigid clay layers. In these four lines, there is an anomaly that has a low resistivity value (<6 Οm). This anomaly is predicted to be part of the soil that polluted by liquid waste pollutants. Based on the results of the mapping of conductivity, TDS, and pH, it is found that the highest pollution in the surface water is in the north and lower in the south.