Polusi Air Tanah Akibat Limbah Industri Dan Limbah Rumah Tangga

Sumber air tanah yang banyak dimanfaatkan warga adalah air sumur gali. Air sumur gali bila kondisinya tercemar baik oleh limbah domestik maupun limbah industri menyebabkan dampak terhadap kesehatan manusia. Penelitian ini bertujuan untuk mengetahui tingkat polusi dan faktor-faktor yang menyebabkan polusi air tanah akibat limbah domestik dan limbah industri di Kelurahan Kalikabong Kabupaten Purbalingga. Penelitian kuantitatif ini dilakukan pada tahun 2012. Keseluruhan data di uji statistik deng an Fisher's Exact Test. Hasil analisis bivariat menunjukkan tidak ada hubungan antara kekeruhan (p value 1,000), bau (nilai p value 0,183), warna (p value 1,000), dan rasa (p value 0,346) dengan polusi air tanah.Hasil analisis univariat menunjukkan terdapat 100% air sumur warga tidak memenuhi syarat secara mikrobiologi. Air sumur warga yang bau 47,63%, berasa 38,09%, berwarna 33,33%, keruh 28,57%. Faktor-faktor yang menyebabkan timbulnya polusi air sebesar 33,33% berasal dari limbah industri, 47,62% limbah rumah tangga, dan 19,04% berasal dari limbah perkotaan. Untuk mengurangi pencemaran air sumur gali disarankan bagi penduduk setempat untuk pembuatan tangki septik secara komunal.Many people use ground water from their wells. However, it will cause health problems if the water is contaminated by either domestic or industrial waste. This research is aimed at finding the level of pollution and the factors causing the ground water pollution by industrial and domestic waste in Kalikabong, Purbalingga District. This research was quantitative approach that has been done on 2012. Overall the data in a statistical testwith Fisher's Exact Test. The results of the bivariate analysis no correlation between turbidity (p value 1.000), aroma (p value 0.183), colour (p value 1.000), and istasty (p value 0.346) with ground water pollution The result shows that 100% water is in low quality and does not meet the microbiological requirements as tested by coliform bacteria. Moreover, 47.63%water gives unpleasant smell, 38.09% water istasty, 33.33% water becomes a colour, and 28.57% water is turbid. The factors causing the water pollution is the industrial waste (33.33%), domestic waste (47.62%), and urban waste (19.04%). It is suggested that the local people should make communal septic tank facilities

The influence of human head model wearing metalframe spectacles to the changes of SAR and antenna gain: simulation of frontal face exposure

The relationship between specific absorption rate (SAR) and antenna gain inside the head due to the metal-frame spectacles was investigated. The radio frequency (RF) energy source considered is the smartphone used in the frontal face. A computer simulation using CST Microwave Studio 2012 was used for the investigation. Two sets of dipole antennas, operated at 900 MHz and 1800 MHz for GSM applications, were used as representative radiation sources from a mobile phone. Parametric studies were conducted to determine the optimum length of the metal rod, and the length was used to study the possibility of RF irradiation of the metal spectacles model. Then, the spectacles model was used as an analysis tool to study the interaction between gain and SAR in the head. The radiation pattern was plotted to identify the causes of the interactions. The gain decreased when the energy source was very close to the spectacles, and SAR increased enormously