Kajian ini memberi tumpuan kepada penggunaan karbon aktif (AC), batu kapur (LS) dan alginat dalam merawat air sungai Kerian. Nisbah campuran terbaik (AC: LS) 3:7 telah diadaptasi berdasarkan kajian terdahulu untuk menghasilkan penjerap komposit untuk menghilangkan warna dan kekeruhan dan diikuti dengan regenerasi penjerap komposit yang telah digunakan. Faktor dos penjerap, masa sentuhan dan kelajuan agitasi diambil kira dalam proses pengoptimuman demi mendapatkan nilai maksimum untuk menghilangkan warna dan kekeruhan air sungai. Oleh itu, penjerap komposit berjaya menyingkirkan warna sebanyak 94.15% dan 90.92% kekeruhan dengan menggunakan tetapan dos penjerap optimum 23.14 g, kelajuan kilat 114rpm dan masa sentuhan 71 minit. Model penjerapan kinetik dan isoterma untuk penjerap komposit juga telah ditentukan. Hasilnya menunjukkan bahawa kapasiti penjerapan maksimum satu penyerap komposit lapisan untuk warna dan kekeruhan adalah 17.857 PtCo/g dan 8.078 NTU/g, masing-masing. Sementara itu, model penjerapan kinetik menggambarkan kesesuaian penggunaan pseudo tertib kedua. Isoterm Freundlich sesuai untuk data penjerapan keseimbangan. Penjanaan semula penjerap dilakukan oleh kaedah pencuci pelarut menggunakan metanol tetapi malangnya penyingkiran warna dan kekeruhan air sungai tidak berjaya kerana ia membawa kepada nilai negatif.
_______________________________________________________________________________________________________
This study focused on the usage of activated carbon (AC), limestone (LS) and alginates in treating the Kerian river water. Therefore, the best mix ratio (AC: LS) 3:7 has been adapted based on the previous study to produced composite adsorbent for removal of colour and turbidity and followed by regeneration of the used composite adsorbent. Factor of adsorbent dosage, contact time and shaking speed were considered for optimization processes to get maximum value for the removal of colour and turbidity of the river water. As a result, the composite adsorbent manages to remove 94.15% colour and 90.92% turbidity by using optimum adsorbent dosage settings of 23.14 g, shaking speed of 114rpm and contact time of 71min. Kinetic and isotherm adsorption model for composite adsorbent were also determined. The result shows that the maximum adsorption capacity of one layer composite adsorbent for colour and turbidity are 17.857 PtCo/g and 8.078 NTU/g, respectively. Meanwhile, the kinetic adsorption model describes the suitability of the use of pseudo-second order. Freundlich isotherm is suitable for equilibrium adsorption data. Regeneration of adsorbent is done by solvent wash method by using methanol but unfortunately the removal of colour and turbidity of river water was not successful which it brings negative value.
Activated carbon-limestone-alginate (ala) beads for the removal of colour and turbidity from kerian river water / Nur Athirah Rosli