Kinetika Adsorpsi Cangkang Telur pada Zat Warna Metilen Blue

Abstract

Methylene blue was one of the dyes which used in industry. It is an organic compound that dangerous and could disturb biota aquatic if it throws away in the river without preparation. Hence, it needs a treatment in liquid dye waste that could reduce degree of dye. The aim was to analyse reaction kinetic of methylene blue adsorption by egg shell. One of the treatments was adsorption. Synthesized egg shell were analysed by using FTIR to know some function groups. The reaction kinetic experiment was done to count in adsorption dye process, especially in the wastewater from textile industry. Dyes adsorption by using egg shell has equilibrium time at the 70 minutes after adsorption process. Then, the process has not a different significantly. The experiment data were fitted into the Langmuir and Freundlich isotherm. Based on adsorption data, the R 2 value of Langmuir isotherm model was the highest, 0.9986 with adsorption capacity (As) 0.3589 and adsorption coefficient (Kb) 0.7962. The adsorption kinetics of methylene blue on egg shell could be described by a pseudo second order model, with the regresion, R 2 0.9979. Keywords: kinetics, adsorption. egg shell, methylene blueMetilen biru merupakan salah satu zat warna yang digunakan dalam industri. Senyawa ini merupakan senyawa organik yang berbahaya dan mengganggu ekosistem akuatik jika dibuang ke perairan. Oleh karena itu, perlu perlakuan khusus untuk mengurangi kepekatan warnanya, diantaranya melalui proses adsorpsi. Tujuan penelitian ini adalah untuk menganalisis kinetika reaksi adsorpsi metilen biru pada cangkang telur. Sintesis cangkang telur dianalisis menggunakan FTIR untuk mengetahui gugus fungsi di dalamnya. Uji kinetika reaksi dilakukan untuk dijadikan sebagai tolok ukur dalam penyerapan zat warna. Adsorben zat warna oleh cangkang telur memiliki waktu kesetimbangan pada menit >70. Evaluasi data eksperimen adsorpsi dilakukan pada model isoterm Langmuir dan Freundlich. Data adsorpsi yang sesuai adalah model isoterm Langmuir dengan nilai regresi tertinggi sebesar 0,9986; kapasitas adsorpsi (As) sebesar 0,3589 dan koefisien adsorpsi (Kb) sebesar 0,7962. Model kinetika reaksi adsorpsi metilen biru menggunakan cangkang telur cenderung pada pseudo orde 2, dengan nilai R 2 0,9979.

Adsorption of Methylene Blue and Methyl Orange from Aqueous Solution using Orange Peel and CTAB-Modified Orange Peel

“…The adsorption isotherm expresses the relationship between the adsorbate concentration and adsorption capacity at equilibrium and a fixed temperature (15). Adsorption isotherms are often used to characterize heavy metal adsorption, dyes, volatile organic compounds, and gases (28). Adsorption isotherm models can also provide information on the maximum adsorption capacity, which is significant in the evaluation of adsorbent performance (29).…”

Langmuir and Freundlich Equation Test on Methylene Blue Adsorption by Using Coconut Fiber Biosorbent

“…Methylene blue is one of the organic compounds that is used as a synthetic dye. If it is disposed of, it can turn into colored liquid waste (Badriyah and Putri, 2018).…”

Kinetic Study of Blue Methylene Adsorption Using Coconut Husk Base Activated

“…Previous studies that used coconut fiber for methylene blue adsorption without acid or baseactivated adsorbent had the largest adsorption capacity at 75 minutes of adsorption with a qt of 1.91 mg g -1 (Baunsele & Missa, 2021), but in this study the largest adsorption capacity was 1.41 mg g -1 with a maximum adsorption time of 75 minutes. Similar to the research to adsorb methylene blue by egg shells adsorbent, the maximum adsorption equilibrium time occurred at intervals of 70-80 minutes (Badriyah & Putri, 2018),while the adsorption of methylene blue using rice husk reached the adsorption equilibrium at 80 minutes (Lestari, Budiawan, & Fuadi, 2021).…”

“…The teak sawdust was used as copper and chrome adsorbent (Irdhawati, Triyunita Sinthadevi, & Sahara, 2020). Breadfruit rind (Artocarpuscamansi) (Lim et al, 2017), Peach shell (PrunusPersica) (Markovi et al, 2015),banana peel (Fitriani, Oktiarni, & Lusiana, 2015), eggshell (Badriyah & Putri, 2018) and green clam (Silva et al, 2017) which is disposed of as natural waste can be used as methylene blue adsorbent.…”