… the toxic pollutants of PRW before and after the secondary treatment process performed at
the petroleum refinery … In this paper, physico-chemical parameters and heavy metals were …

… completed with modern technology to store and treat wastewater. More details can be found
… and artificial wetlands and lagoons to reduce pollution risk by absorbing of heavy metals …

… oil droplets and heavy metal ions, reducing the effluent … and future implementation trends
in wastewater treatment. … water is a particular flow of petroleum refineries that contains …

… radioactive substances, and heavy metals which can generate … , PN Vertical subsurface
flow constructed wetlands for the … at the Kaduna refining plant (Kaduna, Nigeria). Environ. Sci. …

… grow horizontally and vertically to … treatment wetlands in assistance with bacterial consortium
can be a promising alternative and green technology for remediation of oil refinery effluent. …

… Future studies should focus the effects of influent water … of pollution sources and treatment
of wastewater are significant … remove various heavy metals from mining wastewater by …

… of the heavy metals in constructed wetlands CWs planted … systems: free water surface (FWS)
and subsurface flow (SSF)… Both vertical flow (VF) and free-water surface (FWS) systems, …

… abilities, leading to a source of secondary pollution [82]. The … the fate of Salvinia in the
hyperaccumulation of heavy metals [… crassipes in the constructed wetland to remove heavy metals …

… Constructed wetlands (CW) are wastewater treatment systems … in the horizontal subsurface
flow CW (Layout Fig. 1) before … Heavy metal toxicity is also increased at certain pH levels. …

… constructed wetlands have become increasingly popular as more sustainable and
environmentally friendly techniques of removing heavy metals from the wastewater… sub-surface …