Fig xA and xA Fig

As indicated by batch experiments, the pH of feed solution is an important controlling factor in the heavy metal adsorption process, hence solutions at different pH, namely 2.6 and 4.5 were used to monitor the behaviour of the column. The breakthrough curves of the continuous flow experiments on both pH, follow the characteristic sigmoidal curve and can be seen in Fig. 3. For 'CGP41251' Cu2+ adsorption on the algal CGP41251 under study, the highest maximum bed capacity and the longest breakthrough time is obtained at higher pH, in agreement with batch adsorption experiments as well as other studies [20].