%0 Generic
%A Ana Devita Mutiara, 1417011005
%C UNIVERSITAS LAMPUNG
%D 2018
%F eprints:37186
%I FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM
%T SINTESIS HIBRIDA ALGA Porphyridium sp. DENGAN TEKNIK PELAPISAN SILIKA MAGNETIT (Fe3O4) SEBAGAI ADSORBEN   ZAT WARNA KRISTAL VIOLET  
%U http://digilib.unila.ac.id/37186/
%X Pada penelitian ini telah dilakukan sintesis adsorben hibrida alga Porphyridium sp. menggunakan teknik pelapisan silika (HAS) dan hibrida alga Porphyridium sp. dengan teknik pelapisan silika magnetit, Fe3O4 (HASM).  Adsorben hasil sintesis dikarakterisasi menggunakan spektrofotometer inframerah (IR) untuk mengidentifikasi gugus fungsi yang terdapat pada adsorben, X-Ray Diffraction (XRD) untuk menentukan tingkat kekristalan terutama dari hasil modifikasi HAS dan magnetit serta Scanning Electron Microscopy with Energi Dispersive X-Ray (SEM-EDX) untuk menganalisis morfologi permukaan dan komposisi unsur dalam adsorben.  Hasil adsorpsi kristal violet terhadap HAS dan HASM dianalisis dengan menggunakan spektrofotometer UV-Vis. Tingkat optimum adsorpsi kristal violet terhadap adsorben HAS dan HASM terjadi pada pH 8 dengan waktu kontak 120 menit. Laju adsorpsi kristal violet terhadap HAS dan HASM cenderung mengikuti model kinetika pseudo orde dua dengan nilai k2 masing – masing sebesar 0,477 x 10-5 dan 0,046 x 10-5 g mmol-1 menit-1 serta nilai koefisien korelasi (R2) mendekati 1.  Isoterm adsorpsi kristal violet terhadap HAS dan HASM cenderung mengikuti model isoterm Freundlich.    Kata Kunci : Alga Porphyridium sp., Silika, Hibrida Alga Silika, Magnetit,    Kristal Violet.        This study has been carried out the synthesis of the hybrid adsorbent algae Porphyridium sp. using silica coating (HAS) and Porphyridium sp. algae hybrid with magnetite silica coating technique, Fe3O4 (HASM).  The synthesized adsorbent was characterized using an infrared spectrophotometer (IR) to identify the functional groups contained in the adsorbent, X-Ray Diffraction (XRD) to determine the crystallinity is mainly modify by HAS and magnetite and then Scanning Electron Microscopy with Energy Dispersive X-Ray (SEM-EDX) to analyze surface morphology and element composition in the adsorbent.  The results of crystal violet adsorption on HAS and HASM were analyzed using a UV-Vis spectrophotometer.  The optimum level of crystal violet adsorption for HAS and HASM adsorbents occurred at pH 8 with a contact time of 120 minutes. The rate of crystal violet adsorption on HAS and HASM tends to follow the second order pseudo kinetics model with the values of k2 is 0,477 x 10-5 and 0,046 x 10-5 g mmol-1 minute-1 and then the correlation coefficient (R2) is close to 1. Crystal violet adsorption isotherms for HAS and HASM tend to follow the Freundlich isotherm model.    Keyword: 	Porphyridium sp. Algae, Silica, Silica Algae Hybrids, Magnetite, Crystals Violet.