Increase in biodegradation of dimethyl phthalate by Closterium lunula using inorganic carbon

Abstract

The effect and mechanism of inorganic carbon (IC) on the biodegradation of dimethyl phthalate (DMP) by a green microalga Closterium lunula was investigated. The growth of this microalga and the biodegradation of DMP were significantly enhanced when the initial IC was increased. An intermediate product of DMP biodegradation was identified as phthalic acid (PA) that was accumulated and caused a sharp decrease in pH of microalgal culture medium, which inhibited both the growth of microalga and the biodegradation of DMP. A suggested second-order kinetic equation of organic pollutant biodegradation by microalgae ðÀdC=dt ¼ kNrÞ fitted well with the experimental data. The increase of IC caused a decline in biodegradation rate constant for organic carbon ðkÞ and an increase in growth ðN Þ by supplying a favorite carbon source and mitigating the decrease of pH. As the net effect, the overall biodegradation rate of DMP was promoted as IC increased, which was dominated by the increase of microalgal growth.

Removal of p-chlorophenol by the marine microalga Tetraselmis marina

“…p-CP removal was also enhanced by the increase of NaHCO 3 concentration. The beneficial effect of NaHCO 3 on p-CP removal by the microalga is also reported by Yan and Pan (2004), who observed significant increase in the growth of Closterium lunula and the biodegradation of dimethyl phthalate with increase of NaHCO 3 concentration from 3.5 to 100 mg L −1 .…”

Peroxidase mediated decolorization and remediation of wastewater containing industrial dyes: a review

“…It was observed that more than 30 azo compounds were decolorized and biodegraded into simpler aromatic amines by Chlorella pyrenoidosa, Chlorella vulgaris and Oscillateria tenuis (Yan and Pan 2004). The potential of Cosmarium species, belonging to green algae, was investigated as a viable biomaterial for biological treatment of triphenylmethane dye; Malachite Green (Daneshvar et al 2007).…”

Microbial degradation of Textile Dye (Remazol Black B) by Bacillus spp. ETL-2012

“…In recent years a number of studies have focused on some microorganisms capable of degrading and absorbing dyes from wastewater. A wide variety of microorganisms are reported to be capable of decolonization of dyes [11][12][13][14][15][16][17][18][19][20][21][22][23][24]. The current study has evaluated the potential of isolated bacterial strain from textile effluent for their decolorization efficiency of the textile dye, Remazol Black B under in vitro conditions and optimization of the factors influencing the process.…”