Treatment of an acidic leachate containing metal ions by nanofiltration membranes

Treatment of leather industry wastewater by aerobic biological and Fenton oxidation process

“…At the pH below 2.0, the waste degradation has been reduced, probably due to the formation of [Fe(H 2 O) 6 [52]. On the other hand at pH above 4.0, the insignificant waste degradation observed could be due to the formation of Fe (OH) 4 which is known to reduce the production of hydroxyl radical.…”

“…In Kolkata (India), municipalities dump site (Dhapa) receives the wastewater from nearby tanneries, which affects the human beings through food chain [2]. Conventionally the effluent of tannery industry is treated by coagulation/flocculation [3], adsorption [4,5], nanofiltration [6,7] oxidation by Fenton's reagent [8]. But no treatment process has been identified to remove all sorts of waste present in the leather industrial wastewater.…”

Treatment of landfill leachates by nanofiltration

“…As shown in Table 1, leachate-B is more concentrated than the leachate-A. In general, higher the concentration, the higher osmotic pressure and lower the permeate flux (Murthy and Chaudhari, 2008;Boricha and Murthy, 2008;Ortega et al, 2007). This behavior is shown by NF-300 membrane in Fig.…”

“…4 and 5 that the rejection efficiency of components of leachate-B is lower than that of leachate-A. The solute rejection decreases with increase in feed concentration, which is expected, in general, with RO/NF membranes (Murthy and Gupta, 1997;Peeters et al, 1998;Ortega et al, 2007Ortega et al, , 2008. It is a characteristic nature of the NF membrane and interpreted by screen phenomenon.…”

Bibliometric analysis of research progress in membrane water treatment technology from 1985 to 2013

“…The main reason is that application requirements of membrane technologies increased as the market continues to expand, promoting an increase in the number of patents. It is probable that the rapid growth of patents on membrane water treatment technology was accorded with the prediction that membrane technology would become the most widely used water treatment technology (Ortega et al 2007;Renou et al 2008).…”