Removal of Dark Blue-GL from Wastewater using Water Hyacinth: A Study of Equilibrium Adsorption Isotherm

The present investigation demonstrates that water hyacinth root is a potential adsorbent for the removal of dark blue-GL dye from wastewater by batch process. Various operating parameters such as the adsorption capacity, initial dye concentration, contact time, effect of pH, and adsorbent dosage were examined at different experimental conditions. The effect of pH and dye concentration found to be crucial, have been optimized, and the maximum recovery (~90%) was detected at pH 3 and concentration 150 ppm. The separation of dark blue-GL is proportionally related to the adsorbent dosage, and up to 77% dye was recovered for the dose 1.5 g/L. Langmuir adsorption isotherm model of the adsorption process was carried out at the equilibrium concentration of dark blue-GL uptake, and the corresponding data were analyzed by the least square methods. Kinetic parameters calculated from the tentative data could be fitted well to a pseudo-second-order kinetic model. These results point out aptness of the adsorbent in the niche area due to high adsorption capacity (~24 g/kg) and can be applied in the execution of dark blue-GL-enriche

Effects of Feeding Anti-Stressor and Immunizer to Broiler Chickens on Growth Performance, Meat Yield and Immunity

To examine the influence of anti-stressor and immunizer on the growth of broiler chickens, their meat yield features, and immune response, a total of 360 Cobb-500 day-old commercial broiler chicks were used in a 35-day feeding trial. Experimental birds were randomly assigned to three dietary treatments having six replications each of 20 birds. During the starter and grower periods, corn-soya-based plant protein mash diets were provided. Starter and grower diets were provided in two phases: day-old to 21 days and 22-35 days, respectively. The first group of chicks was treated as control (diet 1), the second group was offered a control diet supplemented with an anti-stressor (diet 2) and the third group received a control diet to which an immunizer was incorporated (diet 3). Growth performance data were recorded weekly. Meat yield traits were determined and blood samples were collected on termination of the experiment. Data were subjected to analysis of variance (ANOVA) in a completely randomized design (CRD). Results showed that significantly higher body weight and lowest FCR values were found in the anti-stressor incorporated group (P [J Bangladesh Agril Univ 2022; 20(2.000): 167-174