Browsing by Author "Rashid, Muhammad Abdur"

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    Adsorptive Removal of Methylene Blue Dye Coloration from Aqueous Solution by Adsorption Using Jute Wastages
    (Daffodil International University, 2020-01) Hoque, Md. Saiful; Rashid, Muhammad Abdur; Jahan, Nusrat
    In this research, treated and untreated waste jute fabric has been used to remove basic dye from aqueous solution by using the dye bath method. Wastage jute fabric was treated by scouring and bleaching. The effect of adsorbent mass on dye removal %, reflectance, and whiteness index has been examined. Furthermore, the effect of pH on dye removal % has been investigated. Maximum dye removal % achieved within 30-45 minutes while 14g treated waste jute fabric used as adsorbent. The adsorption capacity increased from 59.5 to 96 %, with increasing the pH of the aqueous solution from 3 to 10.5 while using treated adsorbents. Whiteness index and reflectance was increased with increasing the adsorbent mass.
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    Scopes of Acid Washing With Varying Concentrations of Phosphoric Acid Vis-À-Vis Bleach Wash
    (Scopus, 2020) Hossain, Md. Jakir; Hoque, Md. Saiful; Rashid, Muhammad Abdur
    To acquire different fading effect and aesthetic outlook several techniques are applied in order that bleach wash is mostly used. As we know many limitations of bleach wash so our main motive is to find out an alternative method which can deliver same or better positive result than bleach wash. For this instance, we intend different concentrated acid wash and draw a comparison between acid and bleach wash on 100% cotton indigo dyed denim fabric. During our research, denim garments were developed using three parameters; bleach concentration 10 gm/L, temperature 40°C, time 20 minutes where acid concentration 0.5 to 2.5 ml/L, temperature 50°C, time 15 minutes. Due to change in acid concentration, the variation of its physical and mechanical properties like strength, weight loss, GSM, EPI & PPI and absorbency are observed. Furthermore, we focus on the color change properties such as wash, rubbing and perspiration fastness, CMC, K/S value and whiteness index. At the end of our study, we noticed that acid washed garments exhibit a promising disparity in almost all properties than bleach washed garments including same fading effects of bleach wash is accomplished by using 2% phosphoric acid in case of acid washing on denim fabric.