%0 Generic
%A TRI AGUS WIJAYANTI, 1517011100
%C UNIVERSITAS LAMPUNG
%D 2019
%F eprints:57163
%I Fakultas Matematika dan Ilmu Pengetahuan Alam
%T ADSORPSI MULTIKOMPONEN (ION Cu(II), METILEN BIRU, DAN   KRISTAL VIOLET) PADA ADSORBEN HIBRIDA ALGA  Nannochloropsis sp. SILIKA-MAGNETIT (Fe3O4)
%U http://digilib.unila.ac.id/57163/
%X Pada penelitian ini telah dilakukan sintesis adsorben hibrida alga Nannochloropsis   sp. dengan menggunakan silika sebagai matriks (HAS) dan pelapisan magnetit   (HASM) sebagai adsorben campuran pasangan larutan metilen biru (MB) dan   kristal violet (KV), serta larutan multikomponen. Karakterisasi material   menggunakan Spektrofotometer Inframerah (IR) untuk mengidentifikasi gugus   fungsi, X-Ray Difraction (XRD) untuk mengetahui tingkat kekristalan, Scanning   Eectron Microscopy with Energy Dispersive X-ray (SEM-EDX) untuk   mengetahui morfologi permukaan. Kadar MB dan KV dianalisis dengan   Spektrofometer UV-Vis pada panjang gelombang masing-masing 664 dan 591 nm   sedangkan kadar ion Cu(II) ditentukan dengan menggunakan Spektrofotometer   Serapan Atom (SSA). Adsorpsi MB dan KV pada HAS dan HASM dipelajari   meliputi variasi waktu, variasi konsentrasi, penggunaan ulang, dan mekanisme   adsorpsi. Kinetika adsorpsi pada adsorben HAS dan HASM dalam campuran   pasangan larutan MB dan KV, serta larutan multikomponen cenderung mendekati   model kinetika pseudo orde dua dengan nilai koefisien korelasi (R  2  ) mendekati 1.   Isoterm adsorpsi larutan MB dan KV dalam campuran pasangan larutan MB dan   KV, serta larutan multikomponen pada adsorben HAS dan HASM cenderung   mengikuti model isoterm Freundlich dengan nilai koefisien korelasi (R  2  )   mendekati 1. Penggunaan ulang adsorben HASM dilakukan sebanyak 5 kali   dengan persen adsorpsi > 99%. Mekanisme adsorpsi MB pada HAS dan HASM   didominasi oleh interaksi pertukaran ion.  Kata Kunci : Nannochloropsis sp., hibrida alga-silika, magnetit, adsorpsi�desorpsi, Metilen biru, Kristal violet, ion Cu(II)    It has been conducted synthesis of hybrid Nannochloropsis sp. algae adsorbent by   using silica as a matrix (HAS) and magnetite coating (HASM) as an adsorbent of   methylene blue (MB) and crystal violet (CV) mixture, as well as multicomponent   solutions. Material characterization used Infrared Spectrophotometer (IR) to   identify functional groups, X-Ray Difraction (XRD) to determine the level of   crystallinity and Scanning Electron Microscopy with Energy Dispersive X-ray   (SEM-EDX) to determine surface morphology. The MB and CV concentration   were analyzed by UV-Vis Spectrophotometer at 664 and 591 nm wavelengths   while Cu (II) ion concentration was determined using Atomic Absorption   Spectrophotometer (AAS). The MB and CV adsorption on HAS and HASM were   studied including time variation, concentration variation, reusability, and   adsorption mechanism. The kinetics of adsorption on HAS and HASM adsorbents   in a mixture of MB and CV solution pair as well as multicomponent solutions   tend to approach the pseudo-second order kinetics model with a correlation   coefficient (R2  ) close to 1. The isotherm adsorption of MB and CV solutions in a   pair of mixtures, and multicomponent solutions on HAS and HASM adsorbent   tend to follow the Freundlich isotherm model with a correlation coefficient (R2  )   close to 1. Reuse of HASM adsorbent is done 5 times with percent of adsorption>   99%. The MB adsorption mechanism on HAS and HASM is dominated by ion   exchange interactions.  Keywords: Nannochloropsis sp., Hybrid algae-silica, magnetite, adsorption�desorption, Methylene blue, Crystal violet, Cu (II) ion.