Green Approach for Wastewater Treatment—Degradation and Mineralization of Aqueous Organic Pollutants by Discharge Plasma

Reddy, P. Manoj Kumar; Subrahmanyam, Ch.

doi:10.1021/ie301122p

Cited by 131 publications

(69 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As complete oxidation is required for the treatment of waste water and transfer of contaminants is not complete in methods like photocatalysis, ultrasonication , UV/ozone [101]. Phsicochemical effects of plasma gernerates the formation of oxidizing species: radicals (H − , O − , OH − ) may diffuse into the liquids and molecules (H 2 O 2 , O 3 , etc.…”

Section: Waste Water Treatmentmentioning

confidence: 99%

Cold Plasma: A novel Non-Thermal Technology for Food Processing

2014

View full text Add to dashboard Cite

In the past cold plasma is used for sterilization of sensitive materials and now it is extended to food industries as a novel technology. For years cold plasma processing has been viewed as useful for microbial inactivation while maintaining quality of fresh produce. However, this process is not effective for in vitro model food systems for inactivation of microbes or enzymes which are present in intact tissues, as it is a surface phenomenon. Cold plasma technology is also used to inactivate endogenous enzymes which are responsible for browning reactions particularly polyphenoloxidase and peroxidases. Several research investigations showed a reduced growth of microorganism via different mode of actions by etching phenomenon, cell disruption by electrophoration etc. Plasma technology is considered as modern non conventional technique which is used for the preparation of modified starches, altering its physical and chemical properties. Overall application of cold plasma for microbial destruction on different food substrates like fruits, meat products, cheese etc. was discussed. Besides this, it is also used to alter the germination rate of seeds. It is an eco-friendly process which is used in the preservation of food and other potential applications as an alternative to common techniques.

show abstract

Section: Waste Water Treatmentmentioning

confidence: 99%

Cold Plasma: A novel Non-Thermal Technology for Food Processing

2014

View full text Add to dashboard Cite

show abstract

“…The degradation efficiency could be improved via increase in pulsed voltage and frequency. Hydroxyl radical dominated and reacted with 2,4-dichlorophenol forming series of intermediate by-products such as 3,5-dichloro-1, 2-benzenediol, 2-chlorohydroquinone, and 1,2,4-trihydyoxybenzene including 2,4-hexadienal, maleic acid, and formic acid as detected by GC-MS. Reddy et al (2012) applied corona discharge system to remove and degrade crystal violet. Hydroxyl radical was responsible for the degradation of crystal violet.…”

Section: Electrohydraulic Discharge Treatment In Watermentioning

confidence: 99%

“…The removal efficiency was enhanced in the presence of TiO 2 . In a related study, Manoj Kumar Reddy and Subrahmanya (2012) established that the degradation and mineralization of crystal violet by arc discharge plasma was due to the presence of the generated active species such as hydroxyl radicals, hydrogen peroxide, and UV. The addition of Fe 2+ enhanced the decomposition rate of crystal violet.…”

Section: Electrohydraulic Discharge Treatment In Watermentioning

confidence: 99%

A Review of Combined Advanced Oxidation Technologies for the Removal of Organic Pollutants from Water

Tijani

Fatoba

Madzivire

et al. 2014

Water Air Soil Pollut

212

View full text Add to dashboard Cite

Water pollution through natural and anthropogenic activities has become a global problem causing short-and long-term impact on human and ecosystems. Substantial quantity of individual or mixtures of organic pollutants enter the surface water via point and nonpoint sources and thus affect the quality of freshwater. These pollutants are known to be toxic and difficult to remove by mere biological treatment. To date, most researches on the removal of organic pollutants from wastewater were based on the exploitation of individual treatment process. This single-treatment technology has inherent challenges and shortcomings with respect to efficiency and economics. Thus, application of two advanced treatment technologies characterized with high efficiency with respect to removal of primary and disinfection byproducts in wastewater is desirable. This review article focuses on the application of integrated technologies such as electrohydraulic discharge with heterogeneous photocatalysts or sonophotocatalysis to remove target pollutants. The information gathered from more than 100 published articles, mostly laboratories studies, shows that process integration effectively remove and degrade recalcitrant toxic contaminants in wastewater better than singletechnology processing. This review recommends an improvement on this technology (integrated electrohydraulic discharge with heterogeneous photocatalysts) viz-a-vis cost reduction in order to make it accessible and available in the rural and semi-urban settlement. Further recommendation includes development of an economic model to establish the cost implications of the combined technology. Proper monitoring, enforcement of the existing environmental regulations, and upgrading of current wastewater treatment plants with additional treatment steps such as photocatalysis and ozonation will greatly assist in the removal of environmental toxicants.

show abstract

“…According to an estimate, about 20% of industrial water pollution is caused due to treatment and dyeing of textiles. The water is found to be rich in color and consists of residues of reactive dyes (intermediates) and a large number of different compounds [1]. Dyes released from various sources, e.g., textile industries, cosmetics, pharmaceuticals, paper and pulp industries are regarded as one of the potent pollutants being added to the natural water resources.…”

Section: Introductionmentioning

confidence: 99%

“…The textile industry is believed to be the major polluter of clean water by the usage of about more than 8000 chemicals in various processes of dyeing and printing. During these processes a major proportion of dye dissipates into the water stream, which makes the discharge distinctly colored which cannot be removed by traditional water treatment methods [1]. Since majority of dyes possess high water solubility, they pass through drains and rivers and hence affect the quality of water, making it unfit for consumption [2,3].…”

Section: Introductionmentioning

confidence: 99%