Analisis Kualitas Udara Parameter Deposisi Basah dan Deposisi Kering di Sorong Tahun 2022
Kata Kunci:
Curah Hujan, Kimia Air Hujan, Kualitas Udara, Passive Gas, Suspended Particulate MatterAbstrak
Deposisi asam merupakan fenomena pencemaran udara yang banyak dikaitkan dengan aktivitas energi yang mengemisikan senyawa polutan bersifat asam ke atmosfer. Deposisi asam adalah salah satu dampak dari pencemaran udara. Pengamatan kualitas udara di Kota Sorong diperlukan untuk mengetahui tingkat pencemaran udara yang terjadi akibat faktor alam dan aktivitas antropogenik. Pengamatan deposisi asam di Kota Sorong dilakukan dengan dua parameter yaitu deposisi basah dan deposisi kering. Pengamatan deposisi basah menggunakan pengukuran kimia air hujan berupa pH, Konduktivitas, dan Konsentrasi Ion Mineral. Pengamatan deposisi kering menggunakan parameter Partikulat SPM dan Passive Gas (SO2 dan NO2). Hasilnya diperoleh bahwa tingkat keasaman (pH) air hujan di Kota Sorong selama tahun 2022 masuk dalam kategori pH air hujan asam hingga cenderung netral. Sementara nilai konduktivitas terukur sebesar 2,2 – 50,9 µS/cm. Kandungan kimia yang ada pada air hujan di Kota Sorong didominasi oleh Ion Klorida, Ion Sulfat, Ion Kalium dan Ion Natrium, dimana jumlah anion menyumbang 59% dari total ion yang ada dalam air hujan, dan kation menyumbang sebesar 41%. Selama Januari hingga Desember 2022, konsentrasi SPM harian berada pada rentang 8,63 - 96,24 µg/m3. Berdasarkan nilai baku mutunya, baik harian maupun tahunan, nilai SPM masih jauh di bawah nilai ambang batas yang berlaku. Hasil pengukuran SO2 dan NO2 di Kota Sorong juga menunjukkan bahwa nilai konsentrasi yang dihasilkan masih berada di bawah nilai baku mutu udaranya.
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