Electronic Theses and Dissertation

Telah dilakukan modifikasi bentonit alam dengan asam amino triptofan (Trp-Na- bentonit) yang digunakan sebagai adsorben untuk meningkatkan kapasitas adsorpsi terhadap zat warna naphthol blue black (NBB). Bentonit alam yang berasal dari Teupin Resep Aceh Utara dilarutkan dengan NaCl sehingga membentuk Na-bentonit. Karakterisasi sampel dilakukan dengan menggunakan instrumen Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) dan X-Ray Diffraction (XRD). Hasil penelitian menunjukkan bahwa persen penyerapan adsorpsi zat warna naphthol blue black (NBB) dengan menggunakan bentonit termodifikasi asam amino triptofan mencapai 100% dengan konsentrasi optimum 2,5 ppm. Model isoterm adsorpsi mengikuti isoterm adsorpsi Freunlich dengan nilai R2 = 0,9842. Penambahan asam amino triptofan terbukti meningkatkan sisi aktif dari adsorben Na-bentonit melalui peningkatan adsorpsi zat warna naphthol blue black (NBB) pada permukaan adsorben.

Natural bentonite has been modified with the amino acid tryptophan (Trp-Na-bentonite) which is used as an adsorbent to increase the adsorption capacity of naphthol blue black (NBB) dye. Natural bentonite from Teupin Resep Aceh Utara was dissolved with NaCl to form Na-bentonite. Characterization of the resulting material was carried out using Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) instruments. The results showed that the percent adsorption of naphthol blue black (NBB) dye adsorption using tryptophan amino acid modified bentonite reached 100% with an optimum concentration of 2.5 ppm. The isotherm adsorption model follows the Freunlich isotherm adsorption with a value of R2 = 0.9842. The addition of the amino acid tryptophan has been shown to increase the active site of the Na-bentonite adsorbent by increasing the adsorption of naphthol blue black (NBB) dye on the surface of the adsorbent.