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Tempat pembuangan akhir (TPA) sampah domestik dengan sistempenampungan terbuka sangat berisiko mencemari air tanah milik wargayang bermukim di sekitarnya melalui proses perlindian. Untuk mengetahuikandungan logam berat dalam air tanah di sekitar TPA, sebanyak 68sampel air sumur gali (45 sumur Dusun I dan 23 sumur Dusun IV) dari DesaNamobintang Kecamatan Pancurbatu Kabupaten Deli Serdang, SumateraUtara, telah dianalisis dengan inductively couple plasma atomic emissionspectroscopy. Hubungan jarak sumur dengan konsentrasi kromium,merkuri, dan timbal diuji dengan Mann-Whitney, Spearman?s Correlationdan analisis regresi linier sederhana. Hasil penelitian menunjukkankonsentrasi kromium, timbal, dan merkuri (rerata ± deviasi standar, mg/L)masing-masing 0,036 ± 0,0096; 0,0003 ± 0,00018; dan 0,005 ± 0,0041(Dusun I); 0,0370 ± 0,0115; 0,00026 ± 0,00013; dan 0,0070 ± 0,0069(Dusun IV). Dari 68 sumur yang dianalisis, hanya ada 8 sumur yangkonsentrasi timbalnya melebihi batas menurut Peraturan KementerianKesehatan Republik Indonesia Nomor 492/Per/IV/2010. Sementara itu,tidak ada korelasi jarak sumur gali ke TPA dengan konsentrasi kromium,merkuri, dan timbal dalam air sumur gali tersebut. Disimpulkan bahwaperlindian sampah di Namobintang tidak mencemari air sumur-sumur galiyang berjarak 84 meter atau lebih dari TPA.Dumping site of domestic wastes has potential risk to contaminate ground-water of the surrounding population through leaching process. To determineheavy metals (chromium, lead, and mercury) in groundwater at surround-ing dumping site, a total of 68 dig well water samples (45 from Hamlet I and23 from Hamlet IV) of Namobintang Village, Pancurbatu Sub-District of DeliSerdang Regency, North Sumatra, were analyzed using Inductively CouplePlasma Atomic Emission Spectroscopy. The relationship between the digwell distance and chromium, mercury, and lead content was tested byMann-Whitney, Spearman?s Correlation and Simple Linier Regression. Theresult of this study showed that chromium, lead, and mercury concentra-tions (mean ± SD, mg/L) were 0.036 ± 0.0096; 0.0003 ± 0.00018; and0.005 ± 0.0041 (Hamlet I); 0.0370 ± 0.0115; 0.00026 ± 0.00013; and0.0070 ± 0.0069 (Hamlet IV). Of 68 dig well water samples analyzed, therewere only 8 water samples that had lead concentrations exceeding thedrinking water limit of Peraturan Kementerian Kesehatan RepublikIndonesia Nomor 492/Per/IV/2010. Meanwhile, there was no correlation ofdig well distance to dumping site and heavy metal concentrations in dig wellwater. The study concluded that solid waste leachate in Namobintang didnot contaminate the dig wells water located at 84 meters or more from thedumping site. |
