Proteins from Moringa trees have attracted considerable interest as flocculents for water purification and possibly as materials for remediation of contaminated soil. Understanding the behaviour of the materials at a molecular level is an important step in the process of translating a traditional village activity to optimised exploitation in large-scale water treatment plants. We propose to investigate the extent of adsorption and structure of adsorbed layers at the solution/air interface. The effect of heavy ions, typical of pollutants, will also be investigated. The results will be related both to other fundamental studies of protein adsorption and to practical applications. The seeds from these trees are widely and abundantly available and provide attractive possible alternatives to chemical flocculents in water purification as they are biocompatible and edible.