ABSTRAK Sumur gali merupakan salah satu sarana penyedian air bersih yang berasal dari lapisan tanah yang relatif dekat dari permukaan tanah, sehingga perlu mendapatkan perhatian karena mudah sekali tercemar dan terkontaminasi melalui rembesan. Terutama jika konstruksi sumur gali tersebut tidak memenuhi syarat. Penggunaan sarana air bersih dengan sumur gali juga dilakukan oleh masyarakat di sekitar TPA II di Kelurahan Karya Jaya Musi 2 Palembang. Penelitian ini bertujuan untuk mengetahui apakah pada variabel bau, warna, TDS, pH dan salinitas air sumur gali di sekitar TPA II di kelurahan Karya Jaya Musi 2 Palembang memenuhi standar baku mutu yang sesuai dengan Permenkes Nomor 32 Tahun 2017. Beberapa prosedur pada penelitian ini meliputi dua parameter uji yaitu parameter fisika yang meliputi bau, warna dan total padatan terlarut (TDS) dan parameter kimia yaitu salinitas dan derajat keasaman (pH). Hasil analisis parameter fisika menunjukkan bahwa air sumur gali berbau, berwarna serta memiliki total padatan terlarut sebesar 3,182 mg/l, sedangkan hasil uji parameter kimia yaitu pH 5 dan salinitas 22 ppt. Hasil uji menunjukkan bahwa kualitas air sumur gali pada variabel bau, warna, TDS, pH dan salinitas di sekitar TPA tidak memenuhi standar baku mutu sesuai dengan Permenkes RI No 32 tahun 2017. Kata Kunci : Air Bersih; Sumur Gali; Tempat Pembuangan Akhir (TPA) II
One of the heavy metals contained in the textile industry wastewater is chromium (Cr). Chromium hexavalent ions (Cr6+) are highly toxic and its accumulation in the human body will cause various negative impacts. This study aimed to determine the characteristics of silica synthesized by the sol-gel method to gain homogeneity and high purity. Synthesized silica was calcined at 700°C for 4 hours and its performance to adsorb Cr(VI) ions in textile wastewater was investigated. The presence of -OH group from silanol (–Si-OH) was appeared at wavenumber 3367.70 cm-1, meanwhile siloxane functional groups were recorded at 1056.99 cm-1 and 784.38 cm-1 due to the O-Si-O asymmetric stretching and Si-O bending vibration. Optimum conditions of silica to adsorb Cr(VI) ions took place at pH 2 and contact time of 90 minutes by adsorption efficiency of 75,65% and followed the Freundlich isotherm.
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