Electronic Theses and Dissertation

Limbah merupakan masalah utama dalam pengendalian dampak lingkungan. limbah zat warna yang dihasilkan dari industri umumnya merupakan senyawa organik non-biodegradable yang menyebabkan pencemaran lingkungan terutama lingkungan perairan. penelitian adsorpsi methylene blue menggunakan cangkang biji buah malaka telah dilakukan. penelitian ini merupakan studi awal untuk memperoleh informasi tentang penelitian yang akan dilakukan. adsorpsi methylene blue menggunakan cangkang biji buah malaka bertujuan untuk mengetahui karakteristik adsorben cangkang biji buah malaka, kapasitas adsorpsi optimum serta isoterm adsorpsi yang sesuai untuk menggambarkan proses adsorpsi yang terjadi. penentuan kondisi optimum adsorpsi methylene blue meliputi variasi ukuran partikel, massa adsorben, waktu kontak, ph larutan dan konsentrasi. cangkang biji buah malaka dikarakterisasi menggunakan ftir untuk menentukan gugus fungsi adsorben dan sem untuk mengetahui morfologi permukaan adsorben. hasil karakterisasi ftir pada adsorben cangkang biji buah malaka terdapat gugus –oh, c–h, c=c dan c–o. hasil karakterisasi sem cangkang biji buah malaka sebelum adsorpsi memiliki permukaan yang lebih kasar dan berpoiri dibandingkan dengan setelah adsorpsi permukaan memadat, pori-pori menjadi tertutup dan permukaannya lebih rata. hasil penelitian menunjukkan bahwa kondisi adsorpsi optimum methylene blue menggunakan cangkang biji buah malaka terjadi pada ukuran partikel 120 mesh, massa adsorben 0,05 gram, waktu kontak 30 menit, ph 4 dan konsentrasi 5 ppm. kapasitas adsorpsi methylene blue menggunakan cangkang biji buah malaka maksimum yang diperoleh pada penelitian ini sebesar 2,2771 mg/g. persen penyerapan adsorben cangkang biji buah malaka ini diperoleh hingga 96,98%. persamaan isoterm adsorpsi yang sesuai untuk menggambarkan proses adsorpsi methylene blue mengikuti persamaan isoterm adsorpsi freundlich dengan nilai r2 sebesar 0,9522.

Waste is a major problem in controlling environmental impacts. The dye waste produced from industry is generally a non-biodegradable organic compound that causes environmental pollution, especially the aquatic environment. Research on the adsorption of methylene blue using the seed shell of the malacca fruit has been carried out. This research is an initial study to obtain information about the research to be conducted. Methylene blue adsorption using malacca seed shells aims to determine the characteristics of the malacca seed shell adsorbent, optimum adsorption capacity and the appropriate adsorption isotherm to describe the adsorption process that occurs. Determination of the optimum conditions for methylene blue adsorption includes variations in particle size, adsorbent mass, contact time, solution pH and concentration. Malacca seed shells were characterized using FTIR to determine the functional group of the adsorbent and SEM to determine the surface morphology of the adsorbent. The results of the FTIR characterization were obtained on the malacca seed shell adsorbents which contained –OH, C–H, C=C and C–O groups. The results of SEM characterization of malacca seed shells before adsorption have a rougher and more hollow surface than after adsorption, the surface is solidified, the pores are closed and the surface is flatter. The results showed that the optimum adsorption conditions for methylene blue by malacca seed shells occurred at a particle size of 120 mesh, adsorbent mass of 0.05 grams, contact time of 30 minutes and pH 4. The maximum adsorption capacity of methylene blue using malacca seed shells was obtained in the study this is 2.2771 mg/g. percent absorption of the malacca seed shell adsorbent was obtained up to 96,98%. The appropriate adsorption isotherm equation to describe the methylene blue adsorption process follows the Freundlich adsorption isotherm equation with an R2 value of 0.9522.