The removal of acid sulphate pollution by nanofiltration

Performance of commercial nanofiltration membranes in the removal of nitrate ions

“…Pontie et al [13] and Visser et al [14] have also reported this good performance of this membrane. A significant influence of pH and sulphate concentration on nitrate rejection was observed when working with model solutions (Fig.…”

Salt rejection in nanofiltration for single and binary salt mixtures in view of sulphate removal

“…It has been shown previously that the rejection of uncharged solutes (for example, sugar and alcohol) is usually based on their molecular size [ 17]. According to Table 2, the uncharged solutes used in this study have a decreasing diffusion Fig.…”

Sulfur in the South Florida Ecosystem: Distribution, Sources, Biogeochemistry, Impacts, and Management for Restoration

“…The process was shown to reduce sulfate in treatment water to about 5 mg l −1 . Nanofiltration and reverse osmosis are effective approaches for sulfate removal from water, and can reduce sulfate levels in drainage water by 95-99% (Bakke et al, 1992;Visser et al, 2001). However, nanofiltration suffers from a number of problems for cleaning natural waters, including expensive operating costs and membranes; clogging of the membrane pores by particulate, colloidal, and dissolved organic substances; and biofouling (Nyström et al, 1995).…”