Karbon teraktif disediakan daripada kayu bakau telah digunakan sebagai penjerap ion-ion plumbum daripada larutan akueus. 9 sampel dengan nisbah impregnasi dan suhu pengaktifan berbeza telah diuji terlebih dahulu dan karbon terktif terbaik dari segi peratusan pembuangan ion-ion plumbum tertinggi telah dipilih untuk digunakan bagi mengenalpasti kesan-kesan pH, kepekatan awal larutan plumbum, masa penjerapann dan dos awal penjerap terhadap penjerapan ion-ion plumbum keatas karbon teraktif kayu bakau. Eksperimen kelompok telah dijalankan untuk mengkaji kesemua parameter yang dinyatakan. Didapati pH optimum berada di pH 6, dos optimum pula didapati sebanyak 0.5g bagi 100 mL 100 ppm larutan ion-ion plumbum. Data keseimbangan dianalisa mengunakan model isoterma Langmuir dan Freundlich. Karbon teraktif kayu bakau terbaik dipadankan dengan isoterma Langmuir dengan kapasiti penjerapan maksimum 9.5969 mg/g. Struktur mikro karbon terkatif telah diperhatikan dibawah Mikroskop Imbasan Electron (SEM). Analisis tektur dijalankan untuk mengetahui luas permukaan spesifik dan taburan saiz liang. Didapati luas permukaan karbon teraktif AC900-2.0 ialah 418.55 m2/g dengan isipadu liang terkumpul 0.2041 m3/g. Kumpulan berfungsi di permukaan karbon teraktif tersedia telah dicirikan mengunakan Spektroskopi Inframerah Fourier (FTIR). Kumpulan hidroksil O-H, kumpulan P-H dan kumpulan berfungsi C-H terpesong dari paksi didapati di permukaan AC900-2.0.
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Activated carbon derived from mangrove wood was used as adsorbent for the removal of lead (II) ions from aqueous solution. 9 samples with different impregnation ratio and activation temperature was first tested and the best activated carbon by means the highest percentage of lead (II) ions removal was chosen to be used to study the effect of pH, initial concentration of lead (II) ions, contact time and initial adsorbent dosage on the adsorption of lead (II) ions onto mangrove wood activated carbon. Batch experiment was conducted to study these affecting parameters. It is found that the optimum pH for this experiment is pH 6 and optimum dosage is 0.5 g for 100 mL 100ppm lead (II) ions solution. Equilibrium data were analysed by Langmuir and Freundlich isotherms model. Mangrove wood activated carbon was best fitted with Langmuir isotherm with maximum adsorption capacity of 9.5969 mg/g. The microstructure of the activated carbon was observed under scanning electron microscope. The textural analysis was done to study the specific surface area and pore size distribution. The surface area for AC900-2.0 is 418.55 m2/g with total pore volume of 0.2041 m3/g. Surface functional group was characterized by using Fourier transform infrared spectroscopy, O-H stretching of hydroxy group, P-H group and some out of plane C-H group were found of the surface of AC900-2.0.
Adsorption of lead (ii) ions from aqueous solution onto activated carbon prepared from mangrove wood / Muhamad Syazwan Md Aris