Synthesis and application of cocamidopropyl betaine (CAPB) modified zeolite to reduce COD level in household wastewater

BUSTANUL RIZKY, Dr. Sutarno, M.Si.;Prof. Dr. Bambang Rusdiarso, DEA

2023 | Skripsi | S1 KIMIA

Sintesis dan aplikasi zeolite termodifikasi cocamidopropyl betaine (CAPB) sebagi adsorben COD pada air limbah rumah tangga telah dilakukan. Penelitian ini bertujuan untuk menganalisis pengaruh zeolit termodifikasi surfaktan pada penurunan konsentrasi COD pada air limbah rumah tangga baik secara kualitatif maupun kuantitatif. Zeolit alam diaktivasi menggunakan asam klorida (HCl), hasil aktivasi direaksikan dengan surfaktan CAPB. Sampel kering dianalisis dengan metode Kapasitas Tukar Kation (KTK), Fourier-Transform Infrared (FT-IR), XRay Diffraction (XRD), dan Scanning Electron Microscope-Energy Dispersive XRay (SEM-EDX). Zeolit termodifikasi surfaktan CAPB telah berhasil disintesis. Hasil karakterisasi menggunakan nilai KTK SMZ-CAPB (66.80 meq (100 g)-1) menurun dari nilai KTK AZ (76.00 meq (100 g)-1) dan nilai NZ (78.00 meq (100 g)-1). Kondisi optimum penurunan nilai COD pada air limbah rumah tangga pada adsorben SMZ-CAPB berat 6 g, dan waktu kontak 90 menit. Kapasitas zat organik pada kesetimbangan adalah 0,3917 mmol g-1 untuk IPAL Guras dan 0,4175 mmol g-1 IPAL Prambanan, berdasarkan kinetika orde satu semu Lagergren diperoleh laju adsorpsi zat organik sebesar 2,02 x 10-2 menit-1 untuk IPAL Guras dan laju adsorpsi IPAL Prambanan sebesar 1,83 x 10-2 menit-1, penurunan nilai COD pada SMZCAPB mengikuti mekanisme adsorpsi kinetika orde satu semu Lagergren. Penurunan nilai COD air limbah rumah tangga menggunakan zeolit alam (NZ), zeolit teraktivasi (AZ) dan zeolit termodifikasi surfaktan-CAPB (SMZ-CAPB) menunjukkan efisiensi reduksi > 38,78%.

Synthesis and application of Cocamidopropyl betaine (CAPB) modified zeolite to reduce COD levels in household wastewater has been carried out. These research purposes are qualitative and quantitative analysis of the interaction of zeolite modified by a surfactant to reduce COD content. This research starts with preparing natural zeolite and activated by a chemical agent. After that, activated zeolite was reacted with CAPB surfactant. The dry samples were analyzed using the Cation Exchangeable Capacity method, Fourier-Transform Infrared (FT-IR), XRay Diffraction (XRD), and Scanning Electron Microscope-Energy Dispersive XRay (SEM-EDX). Zeolite modified by using CAPB surfactant has been successfully prepared. This is based on the characterization results using the CEC value of SMZ-CAPB (66.80 meq (100 g) -1) decreased from the CEC value of AZ (76.00 meq (100 g) -1) and NZ value (78.00 meq (100 g) -1). The optimum conditions for reduction of COD value in wastewater on SMZ-CAPB adsorbent weight are 6 g and contact time 90 minutes. Based on pseudo-first-order kinetics, Lagergren obtained the adsorption rate of organic substances is 2.02 x 10-2 min-1 for Guras WWTP, and the rate of adsorption of Prambanan WWTP is 1.83 x 10-2 min-1, and The adsorption capacity of organic substances at equilibrium is 0.391 mmol g-1 for Guras WWTP and 0.4175 mmol g-1 for Prambanan WWTP. The reduction of COD value in wastewater on SMZ-CAPB follows Pseudo-first order Lagergren Kinetics mechanism adsorption. The application of COD reduction value from artificial wastewater containing using natural zeolite (NZ), Activated Zeolite(AZ) and surfactant-modified zeolite-CAPB (SMZ-CAPB) showed that the reduction efficiency was > 38.78%.

Kata Kunci : Zeolite,CAPB,Adsorption,COD