This study was conducted to examine the impact of dumpsites on the quality of groundwater and surface water. The water samples and leachates were collected from dumpsites in respective zones. The physicochemical properties of the samples were examined and determined in accordance with the standards of the American Public Health Association. Results indicated that the groundwater and surface water that are close to the dumpsites have an electrical conductivity of 385 and 245 Sd/cm, total dissolved solids of 168 and 128 mg/L, a turbidity of 4.6 and 22 NTU, a total alkalinity of 103 and 50 mg/L, a total hardness of 120 and 80 mg/L, Ca concentration of 44 and 14 mg/L, Mg concentration of 0.2 and 15 mg/L, SO4 concentration of 4 and 42 mg/L, Cl concentration of 38 and 16 mg/L, and NO3 concentration of 6 and 8 mg/L, respectively. Moreover, the water near the dumpsites had higher elevated physicochemical properties compared with those far from the dumpsites; in addition, they were significantly different (p ≥ 0.05). Hence, the closer the groundwater and surface water to the dumpsite, the greater the negative impact on the physicochemical properties of water. The pH concentration in leachate serves as an indicator for the age and mineralization status of dumpsites, and it influences the other chemical properties of the leachate. Furthermore, the pH concentration in leachate is inversely proportional to the concentration of Ca, Mg, and SO4 in the study area.

Bahasa Abstract

Efek dari Lindi Tumpukan Sampah terhadap sebagian Indikator Kualitas Air dari Air Tanah dan Air Permukaan yang dipilih di Ilokun, Ado-Ekiti, Nigeria. Kajian ini dilaksanakan untuk menguji dampak dari tempat pembuangan sampah terhadap kualitas air tanah dan air permukaan. Sampel-sampel air dan lindi dikumpulkan dari tempat pembuangan sampah di dalam masing-masing zona. Sifat-sifat kimiafisik sampel diuji dan ditentukan sesuai dengan standar Asosiasi Kesehatan Publik Amerika. Hasil-hasilnya menunjukkan bahwa air tanah dan air permukaan yang dekat dengan tempat pembuangan sampah masing-masing memiliki suatu konduktivitas listrik sebesar 385 dan 245 Sd/cm, keseluruhan padatan terlarut sebesar 168 dan 128 mg/L, kekeruhan sebesar 4,6 dan 22 NTU, alkalinitas total sebesar 103 dan 50 mg/L, kesadahan total sebesar 120 dan 80 mg/L, konsentrasi Ca sebesar 44 dan 14 mg/L, konsentrasi Mg sebesar 0,2 dan 15 mg/L, konsentrasi SO4 sebesar 4 dan 42 mg/L, konsentrasi Cl sebesar 38 dan 16 mg/L, dan konsentrasi NO3 sebesar 6 dan 8 mg/L. Lebih jauh lagi, air di dekat tempat pembuangan sampah memiliki kenaikan sifat-sifat kimiafisik yang lebih tinggi dibandingkan dengan air yang jauh dari tempat pembuangan sampah; selain itu, air-air tersebut jauh berbeda (p ≥ 0,05). Oleh karenanya, semakin dekat air tanah dan air permukaan ke tempat pembuangan sampah, semakin besar dampak negatifnya terhadap sifat-sifat kimiafisik air. Konsentrasi pH di dalam lindi berfungsi sebagai suatu indikator untuk status usia dan mineralisasi tempat pembuangan sampah, dan hal ini mempengaruhi sifat-sifat kimia lindi lainnya. Selanjutnya lagi, konsentrasi pH di dalam lindi berbanding terbalik dengan konsentrasi Ca, Mg, dan SO4 di dalam wilayah kajian.


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