Benchmarking recent advances and innovative technology approaches of Fenton, photo-Fenton, electro-Fenton, and related processes: A review on the relevance of phenol as model molecule

Ecotoxicity of phenol and cresols to aquatic organisms: A review.

Ecotoxicity of chlorpyrifos to aquatic organisms: A review

Biodegradation of phenol in saline or hypersaline environments by bacteria: A review.

Adsorption of phenol on porous carbon from Toona sinensis leaves and its mechanism

Toxicological effects of phenol on four marine microalgae.

Isochrysis galbana MACC/H59 was screened from eight strains of marine microalgae to investigate its capability for phenol biodegradation. Batch incubation experiments were performed for 25 to 200 mg L−1 initial phenol concentrations. Five growth inhibitory kinetic models were used to fit the experimental data. The specific activities of phenol hydroxylase and catechol dioxygenase in I. galbana are measured. The results showed that phenol, at concentrations of less than 100 mg L−1, could be completely degraded in 4 days. The growth kinetics of I. galbana under different phenol concentrations were best fitted with a Yano model among five kinetics models tested. The values of substrate inhibition constant (117.59 mg L−1), limiting substrate concentration (183.90 mg L−1) and optimal substrate concentration (81.46 mg L−1) for phenol biodegradation of I. galbana were also obtained with the Yano model. The phenol biodegradation in I. galbana was mainly catalysed by intracellular enzymes. The ortho-pathway is significantly predominant over the meta-pathway in phenol metabolism in I. galbana. High concentrations of phenol significantly inhibited the activity of phenol hydroxylase, but had no obvious effect on catechol dioxygenase. Isochrysis galbana may be a suitable marine microalgal species for use in environmental restoration operations after accidental spills of phenol at sea.

Biodegradation of phenol by Isochrysis galbana screened from eight species of marine microalgae: growth kinetic models, enzyme analysis and biodegradation pathway

As a hazardous chemical, p-chloroaniline (PCA) shows intensive adsorption and accumulation after entering the aquatic ecosystem, which can be enriched in organisms and cause damage. With the objective of achieving an integrated and mechanistic view of the toxic effects of PCA in the marine sentinel organism Ruditapes philippinarum, Manila clams were exposed to different concentration of PCA (0.5, 2 and 5 mg/L) for 15 days. Focusing on the gills, first targeting the toxic and digestive gland, the metabolic detoxification organ, we detected dose- and time-related changes inantioxidase activities and biomacromolecular damages in treated clams. Glutathione S-transferase (GST) activity and glutathione (GSH) contents were significantly induced, and superoxide dismutase (SOD) activity increased at the beginning of exposure and then decreased. The malondialdehyde (MDA) and protein methylation (PC) contents which represent lipid peroxidation and carbonylation of proteins, increased first with exposure time and then decreased in the digestive gland. DNA strand break levels were consistently higher than those in the control group. The digestive gland showed more sensitivity to the stress of PCA than the gills. GST and MDA in the gill and GST, GSH, SOD, DNA strand break level in the digestive gland showed significant correlation with PCA exposure, which indicated that these parameters can be used as sensitive biomarkers to indicate toxic effects from chloraniline leakage.

/pdf/impact-of-p-chloroaniline-on-oxidative-stress-and-19tzhbhr.pdf

Impact of P-Chloroaniline on Oxidative Stress and Biomacromolecules Damage in the Clam Ruditapes philippinarums: A Simulate Toxicity Test of Spill Incident

Guoshan Wang

Papers

Ecotoxicity of phenol and cresols to aquatic organisms: A review.

Toxicological effects of phenol on four marine microalgae.

Biodegradation of phenol by Isochrysis galbana screened from eight species of marine microalgae: growth kinetic models, enzyme analysis and biodegradation pathway

Impact of P-Chloroaniline on Oxidative Stress and Biomacromolecules Damage in the Clam Ruditapes philippinarums: A Simulate Toxicity Test of Spill Incident