Sintesis garam hidroksida nikel terlapis (Ni-LHS) dan aplikasinya sebagai adsorben zat warna remazol yellow FG telah dilakukan. Tujuan utama dari penelitian ini adalah untuk mengembangkan adsorben yang ramah lingkungan dan efektif sebagai adsorben zat warna. Penelitian diawali dengan mensintesis Ni-LHS dengan metode kopresipitasi dan grinding menggunakan Ni(NO3)2.6H2O and NaOH. Rasio mol OH/Ni yang digunakan yaitu 0,3; 0,6 dan 0,9. Material Ni-LHS yang dihasilkan dikarakterisasi menggunakan spektrofotometer fourier transform infra red (FTIR), x-ray powder diffraction (XRD), dan scanning electron microscopy(SEM). Kestabilan Ni-LHS ditentukan oleh pengaruh pH larutandan selanjutnya Ni-LHS diaplikasikan sebagai adsorben zat warna remazol yellow FG. Karakterisasi menggunakan XRD menunjukkan bahwa Ni-LHS memiliki puncak difraksi pada 2tetha¸ sekitar 12, 25, 33, 60 derajat. Sintesis Ni-LHS optimum pada rasio mol OH/Ni 0,6. Hasil penelitian menunjukkan bahwa Ni-LHS stabil pada pH > 3. Kondisi optimum untuk mengadsorpsi zat warna remazol yellow FG diperoleh pada pH 3 dengan waktu kontak 60 menit. Konstanta laju reaksi (k) berdasarkan model kinetika Ho untuk Ni-LHS metode kopresipitasi dan grinding masing-masing sebesar 20554 dan 19670 g mol-1 menit-1. Kapasitas adsorpsi (qmax) berdasarkan model isoterm Langmuir sebesar 0,0001786 mol g-1 untuk kedua metode.

Synthesis of Nickel Layered Hydroxide Salts (Ni-LHS) and its application as remazol yellow FG dye adsorbent had been conducted. The main goal of this research is to develop environmentally friendly and effective material as a dye adsorbent. This research was initiated by synthesis of Ni-LHS through coprecipitation and grinding method using Ni(NO3)2.6H2O and NaOH. The mole ratios of OH/Ni that is used were 0.3, 0.6 and 0.9. Ni-LHS were characterized by spectrophotometer fourier transform infra red (FTIR), x-ray powder diffraction (XRD), and scanning electron microscopy (SEM). The stability of Ni-LHS was determined by the effect of pH solution and then Ni-LHS was applied as remazol yellow FG dye adsorbent. Characterization of XRD showed that Ni-LHS had diffraction peaks at 2tetha around 12, 25, 33, and 60 degrees. Synthesis of Ni-LHS was optimum at the mole ratio of OH/Ni 0.6. The result showed that Ni-LHS were stable at pH > 3. The optimum condition to adsorp remazol yellow FG dye obtained at pH 3 with contact time of 60 min. The adsorption rate constant (k) based on the Ho kinetic model for Ni-LHS coprecipitation and grinding methods were 20554 and 19670 g mol-1 min-1. The adsorption capacity (qmax) based on the Langmuir isotherm model were 0,0001786 mol g-1 for both methods.

Kata Kunci : adsorption, coprecipitation, grinding, remazol yellow FG dye