The free energy change (Î´G 0) for the adsorption process was found to be â12.60 kJ/mol. The results indicated that the biomass of Ulothrix zonata is a suitable biosorbent for both the removal and recovery of heavy metals from wastewater.hen, a given amount of inactivated dried U. zonata was suspended in double distilled water by homogenizing for 45 min in a Waring blender. An algal suspension was prepared in solidâliquid ratio of 10 g alg/l solution and used by diluting. The surface area of the biosorbent was determined to be 1.1 m 2 /g (BET-N 2).
A glass electrode is a type of ion-selective electrode made of a doped glass membrane that is sensitive to a specific ion. The most common application of ion-selective glass electrodes is for the measurement of pH. The pH electrode is an example of a glass electrode that is sensitive to hydrogen ions. Glass electrodes play an important part in the instrumentation for chemical analysis and physico-chemical studies.
There are large and small models of pH meters. Portable models are available to take out in the field and larger models, such as this one, are used in the lab. To use this pH meter, the water sample is placed in the cup and the glass probe at the end of the retractable arm is placed in the water. Inside the thin glass bulb at the end of the probe there are two electrodes that measure voltage. One electrode is contained in a liquid that has a fixed acidity, or pH.