Penurunan Kadar Logam Cr(VI) Dan Zat Warna Dari Limbah Batik Menggunakan Adsorben Zeolit Terimpregnasi Fe2(SO4)3 Dengan Metode Adsorpsi
Keywords:
Limbah Batik, Adsorpsi, Impregnasi, Zeolit, Fe2(SO4)3Abstract
Industri batik menghasilkan limbah cair yang mengandung logam berat Cr(VI) dan zat warna sintetis yang berpotensi mencemari lingkungan. Penelitian ini bertujuan mengevaluasi kemampuan zeolit alam yang diaktivasi menggunakan HCl 2 M dan diimpregnasi Fe₂(SO₄)₃ sebagai adsorben dalam menurunkan kadar Cr(VI) dan zat warna limbah batik menggunakan sistem adsorpsi kolom tetap (fixed-bed column). Variasi yang dikaji meliputi laju alir 400–1400 mL/menit dan massa adsorben 350–550 g. Karakterisasi adsorben dilakukan menggunakan BET dan SEM-EDS. Hasil BET menunjukkan bahwa aktivasi meningkatkan luas permukaan zeolit sebesar 29,28%, volume pori sebesar 14,28%, sedangkan diameter pori relatif tetap pada kisaran mesopori. Analisis SEM-EDS menunjukkan keberhasilan impregnasi Fe₂(SO₄)₃ dengan peningkatan kandungan Fe dari 3,73 menjadi 9,12 wt%. Hasil adsorpsi menunjukkan bahwa peningkatan massa adsorben meningkatkan efisiensi penyisihan Cr(VI) dan zat warna, sedangkan peningkatan laju alir menurunkan efisiensi adsorpsi akibat berkurangnya waktu kontak. Kondisi operasi terbaik diperoleh pada massa adsorben 550 g dan laju alir 400 mL/menit dengan konsentrasi akhir Cr(VI) sebesar 0,75 mg/L dan zat warna sebesar 198,8 Pt-Co yang telah memenuhi baku mutu limbah tekstil berdasarkan Peraturan Menteri Lingkungan Hidup dan Kehutanan Republik Indonesia Nomor P.16/MENLHK/SETJEN/KUM.1/4/2019.
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