Recovery Logam Cu (II) dan Cr(VI) dari Limbah Cair Elektroplating Menggunakan Polymer Inclusion Membrane (PIM)

Abstract

Telah dilakukan penelitian tentang recovery logam Cu(II) dan Cr(VI) dari limbah cair elektroplating menggunakan Polymer Inclusion Membrane (PIM). [NA1] PIM memiliki kestabilan yang tinggi untuk mengatasi kelemahan ketidakstabilan membran cair. Membran PIM diletakkan diantara dua fasa yaitu fasa umpan sebagai sumber logam Cu (II) dari limbah elektroplating dengan pH 3 dan fasa penerima adalah larutan HNO3 denganpH 1 dan pH 4,4 di fasa umpan serta pH 6,3 di fasa penerima dengan NaCl 2 N untuk logam  Cr(VI). Efisiensi recovery diketahui dengan menentukan kadar Cu (II) dan Cr(VI) dalam fasa umpan dan penerima menggunakan AAS, sedangkan karakterisasi membran menggunakan FTIR, SEM dan spektroskopi UV. Membran PIM yang dihasilkan memiliki sifat: tipis, bening, jernih dan lentur. Dari hasil AAS diperoleh persentase transpor PIM yang dilakukan dengan pengadukan selama 24 jam menunjukkan bahwa persentase transpor logam Cu (II) yang paling tinggi dari fasa umpan sebesar 83,41% dan transpor pada fasa penerima sebesar 72,56%. Sementara prsentase transpor Cr(VI) optimal yaitu 97,8% dari fasa umpan serta 76,5 % di fasa penerima. Hasil karakterisasi membran menggunakan spektroskopi FTIR dan UV menunjukkan bahwa membran PIM cukup stabil. Sedangkan hasil SEM menunjukkan tidak terdapat pori dalam membran sehingga transpor yang terjadi secara difusi melalui perantara senyawa pembawa  Research on Cu (II) and Cr(VI) metal recovery from electroplating wastewater using a Polymer Membrane Inclusion (PIM was conduct. PIM has a high stability to overcome the distability of liquid membrane. PIM membrane was placed between two phases, namely phase feed as a source of Cu(II) from electroplating wastewater with pH 3 and receiver phase was HNO3 solution with a pH of 1 while a system with pH 4,4 in feed phase and 6.3 in receiver phase (2N NaCl) was used for recoveried Cr(VI) from electroplating. The efficiency of recovery was known by determine the concentration  of Cu (II) and Cr(VI) in feed phase and receiver using AAS, whereas the membrane was characterized using FTIR, SEM and UV spectroscopy. The resulting PIM membrane had properties: a thin, transparent, clear and supple. From the results was obtained that the percentage of transport of Cu (II) at the highest performance from the feed phase was 83.41% and transport at the receiving phase was 72.56%. While the highest transport of Cr(VI) from feed phase by 97,8 %  and in receiving phase was 76,5 %. Results membrane characterization using FTIR and UV spectroscopy showed that the PIM membrane was quite stable. While the results of SEM showed that no pores in the membrane so that the diffusion transport occurs through intermediary carrier compound.