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Removal of textile dye by electrochemical treatment

Removal of textile dye by electrochemical treatment / Gun Yin Farn
Salah satu masalah utama yang berhubungkait dengan air sisa daripada industri tekstil adalah warna. Scara amnya, pewarna reaktif yang dibebaskan daripada industri adalah susah diuruskan disebabkan oleh ketidakserasian serta ketidakpatuhan dengan rawatan biologi. Kajian ini dijalankan ke atas air sisa yang mengandungi “reactive Red dye” (Cibacron Red CR) dengan menggunakan kaedah elektrokimia yang terdiri daripada cast iron sebagai elektrod dan sodium chloride (NaCl) sebagai elektrolit bagi tujuan menyahwarnakan bahan pewarna tersebut. Objektif utama kajian ini dijalankan adalah untuk menentukan optimum bagi kombinasi faktor tahap pengaruh bagi penyahwarnaan pewarna. Suatu eksperimen telah dijalankan bagi menentukan kesan beberapa parameter yakni kepekatan eletrolit, kepekatan pewarna, ketumpatan serta masa reaksi bagi penyahwarnaan dengan menggunakan elektrod besi beracuan. Spektrometer turut digunakan dengan penetapan pada 525mm bagi mengukur tahap penyerapan sebelum and selepas sampel dinyahwarnakan. Kepekatan NaCl tidak mempengaruhi kesan penyahwarnaan disebabkan kepekatan yang digunakan dalam kajian ini adalah jauh lebih tinggi daripada keperluan optimum. Tahap penyahwarnaan didapati bergantung kepada ketumpatan semasa, kepekatan pewarna dan juga masa reaksi. Penambahan ketumpatan semasa dan masa reaksi serta pengurangan kepekatan pewarna akan meningkatkan keberkesanan proses penyahwarnaan. Eksperimen ini dijalankan dengan merujuk kepada faktor rekabentuk iaitu 4 faktor pada 3 tahap masing-masing. Keputusan menunjukkan bahawa lebih 99% penyahwarnaan tercapai dibawah keadaan operasi yang optima. _______________________________________________________________________________________________________ One of the main problems associated with wastewater from textile industries is colour. Reactive dyes in industrial discharge, in particular, are difficult to manage as they are not readily amenable to biological treatment. The present study employs an electrochemical method using cast iron electrodes and sodium chloride (NaCl) as electrolyte to decolourise synthetic wastewater containing reactive Red dye (Cibacron Red CR). The main objective of this study was to determine the optimum combination of influencing factor levels for dye removal. A laboratory-scale batch experiment was used to investigate the effect of operating parameters, electrolyte (NaCl) concentration (0.6-1.0 g/l), initial dye concentration (20-100 mg/l), current density (1-3 mA/cm2) and reaction time (20-60 min), on colour removal using cast iron electrodes. A scanning UV-visible spectrophotometer set at 525 nm was used to measure the absorbance before and after the dye solution was treated. NaCl concentration did not effect dye removal because its concentration used in this study was found to be greater than the optimum required. Removal was found to be highly dependent on, current density, initial dye concentration and reaction time. Increasing the current density and reaction time and lowering the initial dye concentration showed an increase in the colour removal. The experiment was conducted following a factorial design with 4 factors at 3 levels each. The results show that over 99% dye removal may be achieved under optimum operating conditions. The multiple correlation coefficient of determination, R-Squared was 0.8148. This shows that the actual data give a quite good fit to the predicted data.
Contributor(s):
Gun Yin Farn - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875002412
Language:
English
Subject Keywords:
wastewater; textile; colour
First presented to the public:
3/1/2006
Original Publication Date:
9/9/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Civil Engineering
Citation:
Extents:
Number of Pages - 81
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-09-09 15:14:36.196
Submitter:
Mohd Jasnizam Mohd Salleh

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