This study investigates the fouling mechanisms and cleaning strategies for MOCs membranes during the direct filtration of coal mine water. The primary fouling components were identified as rock dust and coal fines, with a cake layer forming on the membrane surface and fine coal particles adhering to the inner membrane pores. Membrane intrinsic resistance accounted for 66.9% of the total resistance, while physically irreversible and reversible resistances contributed 60.21% and 39.79%, respectively. Standard pore blockage was the dominant fouling mechanism, and hydraulic backwashing alone was insufficient to restore flux. Chemical cleaning with 0.2% (w/w) HCl achieved a flux recovery rate of 94%. Optimal operating parameters for MOCs membranes were determined to be a transmembrane pressure (TMP) of 0.15 MPa, a backwash cycle of 30 minutes, and a backwash duration of 120 seconds. Under these conditions, MOCs membranes demonstrated high performance in maintaining flux during the direct filtration of mine water.
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Qinbin et al. (2026) studied this question.