Susanti, Ria (2020) Penurunan Kadar Amonia Pada Air Baku PDAM Surya Sembada Kota Surabaya Menggunakan Bio-Adsorben Dari Daun Bidara (Ziziphus mauritiana). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Amonia sangat beracun jika keberadaannya melebihi ambang batas baku mutu sehingga air sungai harus diolah sebelum digunakan sebagai air baku. Penelitian ini berhasil menurunkan konsentrasi amonia dalam air baku PDAM Surya Sembada Kota Surabaya dengan metode adsorpsi menggunakan bio-adsorben daun bidara (Ziziphus mauritiana). Metode adsorpsi adalah batch dengan parameter adsorpsi meliputi variasi waktu kontak, massa adsorben, serta konsentrasi awal dan pH Adsorbat. Absorbansi amonia sebelum dan setelah adsorpsi diukur menggunakan spektrofotometer UV-Vis pada panjang gelombang maksimum 382 nm. Hasil penelitian menunjukkan bahwa %Removal dan kapasitas adsorpsi amonia tertinggi pada larutan NH4Cl sebesar 94,92% dan 0,60 mg/g pada kondisi optimum waktu kontak 80 menit, massa adsorben 0,20 g, konsentrasi awal NH4Cl 10 mg/L (NH3 3,18 mg/L), dan pH NH4Cl 8. %Removal dan kapasitas adsorpsi amonia dalam air baku pada kondisi optimum sebesar 98,60% dan 0,30 mg/g. Konsentrasi amonia dalam air baku setelah adsorpsi mencapai 0,02 mg/L sehingga sesuai baku mutu Peraturan Pemerintah No. 82 tahun 2001 dan Keputusan Menteri Kesehatan RI No. 907/Menkes/SK/VII/2002.
Kata Kunci: Adsorpsi, Adsorben Ziziphus mauritiana, Amonia, Air Baku.
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Ammonia is very poisonous if its presence exceeds the quality standard threshold so that river water must be treated before it is used as raw water. This research succeeded in reducing the concentration of ammonia in the raw water of the PDAM Surya Sembada Surabaya by the adsorption method using Bidara leaves Bio-Adsorbent (Ziziphus mauritiana). The adsorption method used is a batch with adsorption parameters were variations contact time, the mass of adsorbent, initial concentration of NH4Cl and pH. Ammonia absorbance in raw water before and after adsorption was measured using a UV-Vis spectrophotometer at a maximum wavelength of 382 nm. The results showed that the highest value of %removal and adsorption capacities were obtained 94,92% and 0,60 mg/g, at optimum conditions for contact time 80 minutes, mass adsorbent 0,20 g, initial concentration of NH4Cl 10 mg/L (NH3 3,18 mg/L), and pH 8. %Removal and adsorption capacity of ammonia in raw water at optimal conditions were obtained 98,60% and 0,30 mg/g. After adsorption, the concentration of ammonia in raw water reaches 0,02 mg/L so that it conforms to the quality standards threshold in Peraturan Pemerintah No. 82 Tahun 2001 and Keputusan Menteri Kesehatan RI No. 907/Menkes/SK/VII/2002.
Keywords: Adsorption, Ziziphus mauritiana Adsorbent, Ammonia, Raw Water.
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