Phytoremediation: Potential flora for synthetic dyestuff metabolism

Abstract

Dumping of dye-laden effluents into different environmental compartments adversely affects equilibrium and integrity of ecological systems. Being genotoxic, mutagenic and carcinogenic these dyes are quite damaging to health of biota (either aquatic or terrestrial). Many of these dyes are resistant to degradation and remediation under natural conditions and through conventional treatment methods. This situation has necessitated the development of effective and efficient wastewater treatment strategies without further stressing the environment and endangering other life forms. To date many biological systems including microorganisms and plants have been assessed for metabolism of dyestuffs. Phytoremediation catalyzed by natural solar driven pumps (green plants) and their associated metabolic processes has emerged as a comparatively new approach and has proven to be one of the most effective environmental friendly strategies for removal, detoxification and decolorization of dyes. Hence, this review quotes the literature of applied aspects of various plant species and their inherent metabolic as well as extractive potentials which enable them to effectively deal with various coloring agents. ª 2015 Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Impact of pH on the Treatment of Artificial Textile Wastewater Containing Azo Dyes Using Pond Systems

“…However, the outflow samples of unplanted ponds showed that the inflow peak at 1.693 min shifted to 1.736, 1.732 and 1.768 min for normal, high and low pH values, respectively. The presence of new peaks in the outflow samples as a result of new products indicates that the dye removal was due to phyto-transformation by plants (Khandare et al 2011) and bio-transformation by microbes (Tahir et al 2016).…”

Decolorization of Mono Azo Dye and Textile Wastewater using Nano Iron Particles

“…where C o and C t are dye concentration initially and after reaction time t (min), respectively.The reaction between dye molecules and nano iron particles was studied by varying nano iron dose (0.2, 0.4, 0.6, 0.8, 1.0, 1.2, and 1.5 g L −1 ), dye initial concentration (20,40,60,80, and 100 mg L −1 ), and dye initial pH (2,4,6,8,10). The pH of dye was adjusted using hydrochloric acid (1.0 mol L −1 ) or sodium hydroxide solution (1.0 mol L −1 ) and monitored using a digital pH meter.…”

Phytoremediation Potential of Palm Oil Mill Effluent by Constructed Wetland Treatment

“…The systems are combining the physical, chemical and biological process to remove pollutant in wastewater. The main mechanisms involves in the treatment includes phytoaccumulation, phytodegradation, phytovolatilization, phytofiltration, rhizodegradation and phytodesalination [30].…”

“…Suitable plant species used should have high uptake of both organic and inorganic pollutants, fast grow rate, tolerance in polluted water, adaptable to the climate and easily controlled in dispersion [31], [32]. In addition, the efficiency of phytoremediation treatment also depends on the plant species and their characteristics, interaction of their root zone, medium and wastewater properties and the environmental condition [30]. The key roles during implementation of phytoremediation are the rate of photosynthetic activity and the plant growth during the pollutant removal process [6].…”