Abstract
Boron presence in groundwater and surface water is caused by both natural and anthropogenic factors. Owing to their molecular nature, the removal of excessive boron concentrations from water is a serious problem. Among the water treatment systems used on an industrial scale, the most important ones are membrane systems, and among these a special role is played by reverse osmosis (RO). The study assessed the potential of RO with low-pressure spiral wound DOW FILMTEC BW30HR-440i polyamide thin-film composite membranes to enhance removal of boron. The tests carried out by the authors for the selected membrane have demonstrated that the retention level is dependent on the concentration of boron in the feed water and on the forms in which it is present. At an operating pressure of 11 bar and a feed pH of 8, the retention ranged from ca. 50–87%, with better results being obtained for lower boron concentrations in the feed water.
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