Studi termodinamika dan kinetika adsorpsi Rhodamin B oleh ampas teh hijau

Ayuningtyas, Putri (2015) Studi termodinamika dan kinetika adsorpsi Rhodamin B oleh ampas teh hijau. Diploma thesis, UIN Sunan Gunung Djati Bandung.

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Abstract

INDONESIA Rhodamin B adalah zat warna yang banyak dipakai sekaligus sebagai limbah terbanyak pada industri tekstil. Penelitian ini dilakukan untuk mengetahui kemampuan adsorpsi ampas teh hijau untuk mengurangi zat warna rhodamin B dengan melakukan studi termodinamika dan kinetikanya. Kondisi optimum penyerapan terjadi pada waktu kontak 10 menit, pH 4 dan pada suhu 70 °C. Ditentukan pula orde pseudo 2, orde 1 dan 2 untuk mengetahui mekanisme adsorpsi. Adsorpsi ini mengikuti kinetika orde pseudo 2 dan, mengikuti orde 2. Proses adsorpsi ini berlangsung mengikuti Isoterm Freundlich, dengan kapatitas adsorpsi sebesar 0,05 mg g-1. Nilai entalpi adsorpsi negatif, Hads= -9556 kJ mol-1 menunjukan bahwa proses adsorpsi berlangsung secara eksoterm, nilai energi bebas gibbs positif, G = 8542,94 J mol-1 menerangkan bahwa proses adsorpsi berlangsung baik pada temperatur tinggi. ENGLISH Rhodamin B is the most common dye and the most common pollutant in effluents of textile industries. This study was carried out to evaluate applicability of used green tea for the adsorptive removal of Rhodamin B by investigating the adsorption thermodinamic and kinetic process. The optimum condition were obtained for adsorbent in contact time of 10 minutes, at pH 2 and at a temperature of 70 °C. First-, second-, and pseudo-second order kinetic equation were used to investigate the adsorption mechanism. The adsorption followed second order and pseudo second order kinetic. The isoterm that was appropriate for this adsorbent was Freundlich Isoterm with linear (R2=1), and the maximum adsorpstion capacity was found to me 0,05 mg g-1. The negative value of enthalpy of adsorption, Hads= -9556 kJ mol-1, suggested that the adsorption is an exotermic process. The positive value of G of adsorption (8542,94 J mol-1) suggested that the adsorption is spontaneous in high temperature.

Item Type: Thesis (Diploma)
Uncontrolled Keywords: adsorpsi; kinetika adsorpsi; termodinamika; rhodamin B; ampas teh hijau;
Subjects: Chemistry and Allied Science > Data Processing and Analysis of Chemistry
Divisions: Fakultas Sains dan Teknologi > Program Studi Kimia
Depositing User: rofita fita robi'in
Date Deposited: 25 Jan 2019 07:29
Last Modified: 25 Jan 2019 07:29
URI: http://digilib.uinsgd.ac.id/id/eprint/18283

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