Besi adalahsalah satu logam berat yang banyak dipersekitaran ini.Besi berbeza dari logam lain melalui tindak balas kimia,kewujudan secara biologi, dan kadar ketoksidan. Besi boleh menyebabkan kesan sampingan terhadap persekitaran serta tubuh manusia dan ekosistem alam. Dengan demikian, rawatan terhadap besi dalam air sisa perlu dilakukan dengan sebaik mungkin sebelum dibuang ke sistem saliran air. Umumnya, teknologi yang digunakan untuk rawatanadalah berkesan tetapi melibatkan kos yang tinggi. Oleh kerana itu, kajian ini dilakukan menggunakan serapan sebagai kaedah rawatan. Kombinasi abu sekam padi, abu kelapa sawitdan abu arang batu digunakan sebagai agen penyerap dalam kajian ini. Pengaruh kepekatan besi, pH, masa tindakbalas, kadar tindakbalas, kuantiti bahan penyerap pada keberkesanan penyingkiran besi diselidiki. pH2 merupakan pH optimum untuk menyingkirkan Fe daripada larutan. Masa tindak balas dikenalpasti pada masa 40minit. Pada 60mg/l, kecekapan penyingkiran adalah yang tertinggi sementara 0.9g agen penyerap mempengaruhi kecekapan penyingkiran tertinggi. Selain itu, analisis kimia dan fizik dilakukan untuk kenalpasti sifat masing-masing. X-ray difraksi untuk menetukan struktur kristal penyerap sementara SEM berfungsi kenalpasti morfologi permukaan penyerap. Dengan demikian, kaedah rawatan ini berjaya menyingkirkan besi daripada larutan berakua menggunakan sisa bahan buangan.
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Iron is one of the heavy metals that abundance in present environment. It differs from other metals through its chemical behavior, bioavailability and toxicity. It can be toxic pollutant which causing adverse affects severe environmental problem as well as to human body and natural ecosystem. Thus, the treatment on Iron in waste water must be properly conducted before discharge into water bodies. Commonly the technologies used for the treatment are effective but high cost. Therefore, this study was carrying out using sorption as a treatment method. The combination of rice husk ash (RHA), Palm fuel ash (PFA) and coal fly ash (CFA) are used as sorbent in this study. The effect of initial Iron concentration, pH, agitation time, agitation rate, sorbent dosage on removal efficiency of Iron was investigated. pH 2 was found to be optimum conditions to remove Fe2+ from solutions. The agitation time was found to be 40 minutes. At 60 mg/l, the removal efficiency was the highest while 0.9 g of sorbent affected the highest removal efficiency. Besides that, physical and chemical analyses have been done to study the physical and chemical characteristic respectively. X-ray diffraction (XRD) was used to determine the crystal structure that present in the selective sorbent while Scanning electron microscope was done to identify sorbent surface morphologies. Thus, from the study, this treatment method is able to remove Iron from aqueous solutions using waste-derived materials.
Removal of iron (ii) from aqueous solutions using prepared from waste-derived siliceous materials_Mohd Luqman Hakim Mohd Zain_A9_2011_NI