Removal of Heavy Metals from Electroplating Wastewater by Thin-Film Composite Nanofiltration Hollow-Fiber Membranes

Abstract

In this study, thin-film composite nanofiltration (NF) hollow-fiber membranes were used to remove heavy metals from actual electroplating wastewater. The effects of the operating pressure, feed temperature, and feed pH on the membrane performance for the treatment of electroplating wastewater were investigated. The rejection rates for chromium, copper, and nickel ions reached 95.76%, 95.33%, and 94.99%, respectively, at 0.4 MPa. With a rise in the feed temperature, the permeate flux increased while the rejection rates of heavy metals did not significantly change. It was evident that the feed pH greatly affected the permeate flux and heavy-metal rejection as well. In addition, all of the rejection rates of heavy metals by the membrane were over 94.8% throughout the electroplating wastewater concentration process. Also, the NF hollow-fiber membrane showed good stability in electroplating wastewater with a pH value of 2.31.

Hexavalent chromium ion and methyl orange dye uptake via a silk protein sericin–chitosan conjugate

“…[1][2][3] Remediation of these hazardous pollutants can be done by using a variety of techniques, such as adsorption, precipitation, membrane processes, occulation, ion-exchange, chemical coagulation and photo degradation. [4][5][6][7][8][9][10][11][12][13] Among them, adsorption-based technologies are widely recognized as constituting an effective and inexpensive treatment strategy for water tainted with hazardous pollutants. 1,14,15 In recent years, biocomposite materials [16][17][18] have been used for adsorption because of their non-toxic and biodegradable nature.…”

Thin Film Composite and/or Thin Film Nanocomposite Hollow Fiber Membrane for Water Treatment, Pervaporation and Gas/Vapor Separation

“…Wei et al [23] removed heavy metals from actual electroplating wastewater by using thin-film composite nanofiltration (NF) hollow-fiber membranes. Thin-film composite NF hollow-fiber membranes were prepared by an interfacial polymerization technique.…”

“…Plisko et al [25] incorporated fullerenol C 60 (OH) [22][23][24] into the polyamide (PA) selective layer and developed thin film nanocomposite (TFN) hollow fiber membranes for low molecular weight cut-off ultrafiltration. The membranes were fabricated via interfacial polymerization technique by alternately pumping fullerenol dispersion in triethylenetetramine (TETA) aqueous solution and isophthaloyl chloride solution in hexane through polysulfone hollow fiber membranes.…”

Preparation and Pb (II) adsorption in aqueous of 2D/2D g‐C3N4/MnO2 composite

“…The harmful impacts of heavy metals in the environment are mainly attributed to the fact that they cannot be degraded biologically towards animals, plants and human beings . Many technologies, such as membrane filtration, electrolysis, ion‐exchange, adsorption and precipitation, have been studied for the treatment of heavy metals in effluents. Specially, adsorption is considered to be one of the most effective methods for removal of contaminants .…”