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"Penelitian mengenai kemampuan Eichhornia crassipes (Mart.) Solms menyerap logam Fe dalam 3 variasi ukuran telah dilakukan. Penelitian bertujuan untuk mengetahui kemampuan eceng gondok dalam penyerapan logam Fe, mengetahui nilai faktor biokonsentrasi, dan tranlokasi serta efektivitas eceng gondok dalam mengurangi kadar logam Fe pada perairan berdasarkan variasi ukuran kecil, sedang, dan besar. Penelitian dilakukan agar dapat diimplementasikan pada perairan Situ Agathis Universitas Indonesia yang sudah tercemar oleh logam berat Fe. Penelitian dilakukan selama 14 hari dengan menggunakan 5 individu eceng gondok pada setiap perlakuan. Perlakuan penelitian dibagi menjadi tiga kelompok perlakuan, yaitu kelompok kontrol, kelompok yang diberikan logam FeCl3 5 ppm dan kelompok yang diberikan logam FeCl3 10 ppm. Hasil penelitian menunjukkan bahwa eceng gondok dapat menyerap logam Fe dan dapat mentranslokasikannya dari bagian akar, ke bagian tangkai, dan daun. Eceng gondok berukuran kecil dan sedang paling efektif dalam menyerap logam Fe dengan efektivitas penurunan sebesar 99,98 %. Penyerapan logam Fe tertinggi terjadi pada eceng gondok ukuran kecil dengan perlakuan logam FeCl3 5 ppm yakni berjumlah 20.206,3 ppm

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Research on the ability of Eichhornia crassipes (Mart.) Solms to absorb Fe metal in 3 size variations has been carried out. The aim of this study was to determine the ability of water hyacinth to absorb Fe, determine the value of bioconcentration and translocation factors as well as the effectiveness of water hyacinth in reducing Fe metal content in waters based on small, medium and large size variations. The research was conducted so that it could be implemented in the waters of Situ Agathis University of Indonesia which had been contaminated by heavy metal Fe. The study was conducted for 14 days using 5 individual water hyacinths in each treatment. The research treatments were divided into three treatment groups, namely the control group, the group given 5 ppm FeCl3 metal and the group given 10 ppm FeCl3 metal. The results showed that water hyacinth can absorb Fe metal and can translocate it from the roots, to the stalks and leaves. Small and medium water hyacinths were the most effective in absorbing Fe metal with a reduction effectiveness of 99.98%. The highest absorption of Fe metal occurred in small water hyacinths treated with 5 ppm FeCl3 metal, amounting to 20,206.3 ppm"

"Pencemaran limbah cair industri zat warna di Indonesia telah menjadi permasalahan lingkungan yang serius. Beberapa metode yang digunakan untuk mengatasi limbah zat warna diantaranya filtrasi membran, ozonisasi, klorinasi, proses elektrokimia, fotodegradasi, koagulasi flokulasi, oksidasi kimia, oksidasi biologi, dan adsorpsi. Adsorpsi memilki kelebihan yaitu berbagai macam bahan adsorben, preparasi dan operasi mudah, nilai ekonomis tinggi, efisiensi tinggi, reusabilitas baik, cocok untuk beragam zat warna ramah lingkungan dan dapat digunakan untuk menghilangkan pewarna organik dalam perairan dengan skala besar. Beragam adsorben dengan struktur pori dan luas permukaan spesifik telah dipelajari, salah satunya MOFs. MOFs memiliki keunggulan seperti luas permukaan spesifik yang tinggi, porositas yang baik, dan ukuran pori terkontrol. Dalam penelitian ini MOFs jenis MIL-101 (Fe) disintesis menggunakan logam Fe yang ramah lingkungan dan ligan BDC dengan metode solvothermal. Variasi suhu 100oC dan 120oC, jumlah prekursor FeCl3.6H2O 2,45 mmol, 4,9 mmol, dan 9,81 mmol dan jenis pelarut yaitu DMF dan campuran pelarut DMF : Aquades dengan perbandingan 2 : 3 dipelajari pengaruhnya terhadap sintesis MOF, MOF hasil sintesis kemudian diaplikasikan sebagai adsorben zat warna Methylene Blue dan Rhodamine B dalam air. Hasil sintesis dikarakterisasi menggunakan FTIR, XRD, TGA, BET, dan SEM untuk mengetahui ikatan kimia, topologi kerangka, kristanilitas, luas permukaan, dan stabilitas termal. Hasil karakterisasi menunjukan variasi suhu dan prekusor dihasilkan MOF dengan struktur polimorfik MIL-88B. Aplikasi adsorpsi zat warna Methylene Blue dan Rhodamine mencapai kapasitas absorpsi optimum pada pH 9 dan waktu kontak 180 menit adsorpsi Fe-BDC MOF pada Methylene Blue dan Rhodamine B mengikuti pemodelam isoterm adsorpsi Langmuir dengan kapasitas adsorpsi maksimum berturut-turut sebesar 162,82 mg/g dan144,65 mg/g.Kata Kunci: Fe-Metal Organic Frameworks, Methylene Blue, Rhodamine B, Adsorpsi, Ligan BDC (Asam 1,4-benzena dikarboksilat), metode solvothermal.

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The industrial dye-wastewater has been a tremendous environmental problem in Indonesia. Several techniques have been used to eliminate dye-waste water, such as membrane filtration, chlorinaton, ozonation, coagulation-floculation, chemical oxidation, biology oxidation, and adsorption. Adsorption technique is extensively used for removal of the dye-wastewater due the excellent properties of its method, having various of adsorbent material, simple preparation and operation, low cost, high efficiency, good reusability and capable of reducing the organic dyes widely. In this case, many adsorbents, having tunable pore and specific surface area, have been studied. MOFs have some advantages as adsorbents in that their large surface area, tunable pore size, and adjustable porosity. In this work, MOFs type MIL-101 (Fe) was synthesized assisted solvothermal reactions at 100 oC and 120 oC, and various amount of FeCl3.6H2O precursor of 2.45 mmol, 4.9 mmol, and 9.81 mmol. The effect of solvents in the synthesis was studied by using DMF and mixture of DMF: distilled water 3 : 2. Briefly, MIL-101 was synthesized with environmental friendly metal precursor, FeCl3.6H2O, and 1,4 benzenedicarboxylate (BDC) ligands. The material characteristics of the as-synthesized Fe-BDC MOF such as structure and topology of MOFs, surface area, and thermal stability were studied using XRD, FTIR, BET, TGA, and SEM. The XRD patterns show that the crystals of MIL101 was successfully formed with some impurities of MIL-88B. The application of Fe-BDC MOF as adsorbent for Methylene Blue (MB) and Rhodamine B (RhB) in aqueous solution is learned. The optimum adsorption condition showed when 5 mg Fe-BDC MOF is applied to the dyes after 180 minutes at pH 9. It was found that the isotherm data for Methylene Blue and Rhodamine B had a good correlation with the Langmuir isotherm. The maximum adsorption capacity of MOF was able to reach 162,82 mg/g for Methylene Blue and 144,65 mg/g for Rhodamine B.Keyword(s): Fe-Metal Organic Frameworks, Methylene Blue, Rhodamine B, adsorption, 1,4 benzenedicarboxylate (BDC), and solvothermal method."