Sintesis Komposit Granul Geopolimer-Zeolit dari Bahan Baku Lokal Menggunakan Metode Hidrotermal sebagai Adsorben Metilen Biru

  • Rosida Departemen Kimia, Fakultas Matematika dan Ilmu Pengetahuan IPB, Jl. Tanjung Kampus IPB Dramaga Bogor 16680
  • Zaenal Abidin Departemen Kimia, Fakultas Matematika dan Ilmu Pengetahuan IPB, Jl. Tanjung Kampus IPB Dramaga Bogor 16680
  • Sri Sugiarti Departemen Kimia, Fakultas Matematika dan Ilmu Pengetahuan IPB, Jl. Tanjung Kampus IPB Dramaga Bogor 16680
Kata Kunci: adsorpsi, geopolimer, granul, hidrotermal, metilen biru, zeolit

Abstrak

Zeolit dikenal sebagai salah satu adsorben penukar kation dan memiliki kemampuan adsorpsi  yang tinggi. Kedua fungsi zeolit tersebut berpeluang menjadi solusi dalam mengatasi limbah pewarna kationik. Tujuan dari penelitian ini untuk mengetahui nilai KTK dan kapasitas adsorpsi  zeolit dalam menjerap metilen biru. Zeolit serbuk dibuat menggunakan metakaolin lokal dan ditambahkan NaOH maupun water glass dengan metode hidrotermal. Produk zeolit serbuk yang diperoleh dicampurkan dengan geopolimer membentuk komposit granul kecil dan granul besar. Hasil pencirian XRD dari produk sintetik yang diperoleh pada campuran metakaolin dan NaOH ialah zeolit NaA, sedangkan pada penambahan water glass dihasilkan zeolit NaX. Zeolit dalam bentuk serbuk maupun komposit granul geopolimer-zeolit menunjukkan kapasitas tukar kation (KTK) yang tinggi diatas 200 cmol/kg. Uji adsorpsi metilen biru pada masing-masing adsorben menunjukkan kapasitas adsorpsi zeolit NaA, zeolit NaX, komposit granul kecil dan granul besar geopolimer-zeolit NaA, serta komposit granul kecil dan granul besar geopolimer-zeolit NaX secara berurutan sebesar 30.81 mg g-1, 32.84 mg g-1, 53.29 mg g-1, 51.64 mg g-1, 38.32 mg g-1, 54.22 mg g-1dan 48.81 mg g-1.

Unduh

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Diterbitkan
2024-04-01