PENGARUH PENAMBAHAN KITOSAN TERHADAP EFEKTIVITAS PROSES KOAGULASI MENGGUNAKAN BESI (III) KLORIDA HEKSAHIDRAT
DOI:
https://doi.org/10.21776/ub.rbaet.2017.001.02.04Keywords:
asam humat, besi (III), klorida (FeCl3.6H2O), kitosan, koagulasiAbstract
Air gambut merupakan sumber air potensial yang dapat digunakan sebagai air bersih jika diolah terlebih dahulu, dimana penyisihan asam humat menjadi perhatian utama karena kandungannya yang tinggi menyebabkan kekeruhan, intensitas warna yang tinggi, dan sifat asam pada air gambut. Salah satu metode yang dapat digunakan untuk penyisihan asam humat dalam air gambut adalah koagulasi dengan menggunakansenyawa kimia berupa garam logam hidrolisis sebagai koagulan. Pada penelitian ini, Besi (III) Klorida (FeCl3.6H2O) digunakan sebagai koagulan untuk penyisihan asam humat.Penentuan kondisi optimum koagulasi dilakukan dengan variasi pH (6–9) dan dosis koagulan FeCl3.6H2O (20–100 ppm). Koagulasi kemudian dilakukan dengan penambahan kitosan sebagai koagulan pendukung untuk meningkatkan efektivitas proses koagulasi, dimana dosis kitosan divariasikan pada rentang 10–50 ppm.Diperoleh nilai pH optimum adalah pH 7 dan dosis FeCl3.6H2O sebesar 80 ppm dengan penurunan warna sebesar 88,08% dan kekeruhan sebesar 97,08%. Sedangkan dengan adanya penambahan kitosan hingga 50 ppm, penurunan warna dan kekeruhansemakin meningkat hingga  94,75% dan 99,07%.References
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