Latar Belakang: Limbah industri tekstil menghasilkan limbah logam berat kromium (VI)) untuk digunakan dalam proses produksi. Kromium (VI) yang masuk ke dalam air bisa menjadi masalah kesehatan baik jangka pendek maupun panjang. Salah satu wilayah industri yang banyak berkembang terdapat di sektor hulu Sungai Citarum terdapat di Kecamatan Majalaya, Kabupaten Bandung sebagai kawasan zona industri.Terdapat sekitar 1500 industri dengan potensi jumlah limbah yang dibuang mencapai 2.800 ton per hari yang sekaligus sebagai sumber pencemaran paling dominan.Metode: Instrumen penelitian ini adalah observasi dan pengujian sampel di laboratorium.Sampel diambil selama 3 hari berturut-turut di 7 stasiun di setiap lokasi. Variabel yang diuji yaitu, kromium (VI), COD, DO, dan pH. Metode pengambilan yang digunakan adalah grab sampel dengan teknik purposive sampling. Waktu untuk mengambil sampel air dilakukan pada malam hari. Sampel air diawetkan dengan cara pengasaman dan pendinginan sesuai dengan SNI 6989.57: 2008. Hasil penelitian ini dianalisis dengan membandingkan dengan Peraturan Pemerintah No.82 Tahun 2001.Hasil: Hasil penelitian menunjukan konsentrasi kromium (VI)di stasiun A1 adalah 0,042 mg/l, stasiun A2 0,44 mg/l, di stasiun A3 adalah 0,075 mg/l dan stasiun A4 adalah 0,093 mg/l. Selain itu, di stasiun B1, B2, dan B3 konsentrasi di bawah 0,04 mg/l (batas alat minimum). Kadar kromium (VI) A3 dan A4 tidak memenuhi persyaratan menurut PP No.82 tahun 2001 standar kualitas kromium (VI)di badan air kelas II adalah 0,05 mg/l.Simpulan: Air Sungai Citarum di Kabupaten Majalaya telah tercemar oleh kromium (VI). Dari hasil, kromium (VI)telah melebihi perairan sungai dari stasiun A3 dan A4 dengan kadar 0,075 mg/l dan 0,093 mg/l. ABSTRACTTitle: Analysis of Chromium IV pollution based on Chemical Oxygen Demand at Citarum River, Majalaya District, Bandung Regency, West JavaBackground: Textile industrial waste produces heavy metal waste chromium (VI) for use in the production process. Chromium (VI) that gets into water can be a health problem both in the short and long term. One of the most developed industrial areas is in the upstream sector of the Citarum River in Majalaya District, Bandung Regency as an industrial zone. There are around 1500 industries with the potential for the amount of waste disposed of up to 2,800 tons per day which is also the most dominant source of pollution.Methods: The research instrument was observation and sample testing in the laboratory. Samples were taken for 3 consecutive days at 7 stations in each location. The variables tested were chromium (VI), COD, DO, and pH. The method used is grab sampling with purposive sampling technique. Time to take water samples is done at night. The water samples were preserved by means of acidification (HNO3 and H2SO4) and cooling according to SNI 6989.57: 2008. The results of this study were analyzed by comparing with PP No.82 of 2001.Results: The results showed that the chromium (VI) concentration at station A1 was 0.042 mg / l, station A2 was 0.44 mg / l, at station A3 was 0.075 mg / l and station A4 was 0.093 mg / l. In addition, at stations B1, B2, and B3 the concentration was below 0.04 mg / l (minimum equipment limit). Chromium (VI) A3 and A4 levels do not meet the requirements according to PP No. 82 of 2001 the quality standard for chromium (VI) in class II water bodies is 0.05 mg / l.Conclusion: Citarum River water in Majalaya Regency has been polluted by chromium (VI). From the results, chromium (VI) has exceeded the river waters of stations A3 and A4 with levels of 0.075 mg / l and 0.093 mg / l.
Value Of The Index Of Chemical Oxygen Demand As Measure Of The Methanol Content In Return Underground Local-Water Of Oil And Gas Condensate Fields