Effect of Mass Ratio on Phytoremediation of Nickel Contaminated Water

Abstract

Water pollution is one of the global challenges that the society must address in the 21st century aiming to improve the water quality, reduce human pollutants and ecosystem health impacts. In phytotoxicity test, the plant of Iresine herbstii was exposed to remove nickel from simulated wastewater using two different ratios (mass of plant to the mass of nickel) (,Rp/Ni) for 21 days with sub-surface batch system. During the exposure period, the removal of Ni concentrations (2, 5 and 10 mg/L) for two mass ratio (2,800 and 34,000) were (83.6%, 77.2%, 78.0%) and (86.8%, 97% and 95.6%), respectively. final result of the rate was found that the highest removal occurred, 97%, at a mass ratio of 34,000 and a nickel concentration of 5 mg/L. Metal accumulation mechanism of plants were examined using bioconcentration factor (BCF) and translocation factor (TF) of metals which indicated that I. herbstii is suitable for phytostabilization of Ni (BCF>1 and TF<1). Therefore, the ability of I. herbstii to treat wastewater contaminated with nickel that I. herbstii is considered a potential plant to remove Ni from contaminated water.

Assessment of Ornamental Plants Tolerance for Acute Exposure of Acetaminophen and Methylparaben in Constructed Wetlands- a Preliminary Study

“…This technology has attracted great attention due to its numerous advantages, including sustainability, low costs, ease of operation, and application in large areas [7]. Constructed wetlands (CWs) are engineered systems that mimic the physical, chemical, and microbiological processes prevailing in natural wetlands to eliminate various contaminants [8]. CWs are employed to reduce pollutants (nutrients, organic and inorganic waste) in wastewater before discharge into water bodies; further, it represents an alternative to costly conventional sewage treatment techniques [9].…”