Pengaruh Konsentrasi dan Waktu Adsorpsi Timbal(II) Menggunakan Ion Imprinted Polymer (IIP) Termodifikasi Ligan Etilendiamintetraasetat (EDTA)

Effect of Concentration and Adsorption Time of Lead(II) Using Ion Imprinted Polymer (IIP) Modified by Ethylenediaminetetraacetic Acid (EDTA) Ligand

Timbal merupakan salah satu logam yang dapat menggangu kesehatan manusia karena sifat toksiksitasnya. Untuk mengatasi timbal tersebut, maka dibutuhkan solusi dengan menggunakan Ion Imprinted Polymer (IIP). IIP disintesis menggunakan metode presipitasi dengan menggunakan material seperti etilendiamintetraasetat (EDTA) (ligan), asam metakrilat (MAA) (monomer), etilen glikol dimetakrilat (EGDMA) (crosslinker), etanol-asetonitril (2:1) (porogen) yang telah berhasil disintesis. Keberhasilan sintesis dibuktikan dengan FTIR dan TGA. Hasil TGA menunjukkan IIP termodifikasi ligan EDTA mempunyai ketahanan termal hingga suhu 385℃. Analisis konsentrasi dan waktu kesetimbangan adsorpsi diamati pada pH 7. Kapasitas adsorpsi maksimum IIP termodifikasi ligan EDTA sebesar 18,55 mg/g dengan waktu kesetimbangan 5 menit. Model isoterm menunjukkan mengikuti model Langmuir, sedangkan model kinetika mengikuti pseudo second order.

Lead is one of the metals that can harm human health due to its toxicity. To overcome this lead, a solution is needed using Ion Imprinted Polymer (IIP). IIP was synthesized using the precipitation method using materials such as ethylenediaminetetraacetic acid (EDTA) (ligand), methacrylic acid (MAA) (monomer), ethylene glycol dimethacrylate (EGDMA) (crosslinker), ethanol-acetonitrile (2:1) (porogen) which have been successfully synthesized. The success of the synthesis was proven by FTIR and TGA. The TGA results showed that the IIP modified with EDTA ligand had thermal resistance up to a temperature of 385℃. Analysis of adsorption equilibrium concentration and time was observed at pH 7. The maximum adsorption capacity of IIP modified with EDTA ligand was 18.55 mg/g with an equilibrium time of 5 minutes. The isotherm model showed that followed the Langmuir model, while the kinetic model followed the pseudo second order.