Synergy between solar photocatalysis and high frequency sonolysis toward the degradation of organic pollutants in aqueous phase - case of phenol

2017 ◽  
Vol 62 ◽  
pp. 457-464 ◽  
Author(s):  
Salim Bekkouche ◽  
Mohamed Bouhelassa, ◽  
Akila Ben Aissa ◽  
Stéphane Baup ◽  
Nicolas Gondrexon ◽  
...  
Keyword(s):  
Aqueous Phase ◽  
Organic Pollutants ◽  
High Frequency ◽  
Solar Photocatalysis

Mesosilica materials and organic pollutant adsorption: part B removal from aqueous solution

2014 ◽  
Vol 43 (15) ◽  
pp. 5173-5182 ◽  
Author(s):  
L. T. Gibson
Keyword(s):  
Aqueous Solution ◽  
Mesoporous Silica ◽  
Aqueous Phase ◽  
Organic Pollutants ◽  
Organic Pollutant

This tutorial review will focus on the removal of organic pollutants from the aqueous phase by mesoporous silica.

scholarly journals Changes in Adsorption Characteristics of Heavy Metals and Organic Pollutants Following Pyrolytic Treatment of Petroleum-Contaminated Dredged Sediment

2021 ◽  
Vol 43 (7) ◽  
pp. 513-523
Author(s):  
Yoonmi Jang ◽  
Yongju Choi ◽  
Kibeum Kim
Keyword(s):  
Heavy Metals ◽  
Organic Compound ◽  
Bisphenol A ◽  
Distribution Coefficient ◽  
Aqueous Phase ◽  
Organic Pollutants ◽  
Water Distribution ◽  
Mitigation Measures ◽  
Dredged Sediment ◽  
Adsorption Characteristics

Objectives : This study investigated the changes in adsorption characteristics of dredged sediment for heavy metals and organic pollutants after petroleum contamination followed by pyrolytic treatment.Methods : Pyrolytic treatment was conducted at two heating temperatures, 300℃ and 500℃, for 30 min using muffle furnace. Sediment spiked with No. 6 Fuel Oil at initial total petroleum hydrocarbon (TPH) concentrations of 5,000-50,000 mg/kg was used. Sorption experiments were conducted for heavy metals (Cd, Cu, Pb, Zn, Ni, Hg, As, Cr), phenanthrene and bisphenol A using clean sediment (sediment before the petroleum spiking) and pyrolyzed sediment.Results and Discussion : Pyrolytic treatment at 500℃ showed excellent TPH removal efficiency, resulting in the residual concentration of less than 50 mg/kg for all initial TPH contamination levels. High efficiencies (> 98%) were observed for the sorptive removal of Cu, Zn and Pb in the aqueous phase for both the two sediments. The removal efficiencies of Ni and Cd from the aqueous phase using pyrolyzed sediment were 31% and 24% lower than those using clean sediment, respectively, due to the reduced oxygen-containing functional group content and specific surface area after the pyrolytic treatment. The sediment-water distribution coefficient (Kd) and sediment organic carbon-water distribution coefficient (Koc) values of bisphenol A and phenanthrene in pyrolyzed sediment were considerably higher than in clean sediment due to the high organic compound sorption affinity exhibited by carbonaceous matter that was generated during the pyrolytic sediment treatment.Conclusions : The capability of pyrolytic treatment of dredged sediment to notably improve its organic compound sorption capacity may be exploited for beneficial use of the treatment product. The product may be applied as fill and backfill, soil amendment, or in-situ sediment capping materials in highly industrialized areas where mitigation measures for organic contaminant migration are necessary.

Synthesis of CoO-ZnO photocatalyst for enhanced visible-light assisted photodegradation of methylene blue

2022 ◽  
Author(s):  
Muhammad Saeed ◽  
Iltaf Khan ◽  
Muhammad Adeel ◽  
Nadia Akram ◽  
Majid Muneer
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Aqueous Phase ◽  
Organic Pollutants ◽  
Precipitation Method ◽  
Doped Zno ◽  
Co Doped

The synthesis of efficient photocatalysts for visible light-assisted photodegradation of aqueous phase organic pollutants has received significant consideration recently. In this research, Co-doped ZnO is synthesized by precipitation method for...

Hybrid organic-inorganic nanotubes effectively adsorb some organic pollutants in aqueous phase

2020 ◽  
Vol 186 ◽  
pp. 105449 ◽  
Author(s):  
Roberto Nasi ◽  
Filomena Sannino ◽  
Pierre Picot ◽  
Antoine Thill ◽  
Olimpia Oliviero ◽  
...  
Keyword(s):  
Aqueous Phase ◽  
Organic Pollutants ◽  
Inorganic Nanotubes

scholarly journals Measurement of Biologically Available Naphthalene in Gas and Aqueous Phases by Use of a Pseudomonas putida Biosensor

2004 ◽  
Vol 70 (1) ◽  
pp. 43-51 ◽  
Author(s):  
Christoph Werlen ◽  
Marco C. M. Jaspers ◽  
Jan Roelof van der Meer
Keyword(s):  
Pseudomonas Putida ◽  
Gas Phase ◽  
Aqueous Phase ◽  
Organic Pollutants ◽  
Water Solubility ◽  
Aqueous Suspension ◽  
Light Output ◽  
Phase Measurements ◽  
Naphthalene Concentration ◽  
Partitioning Coefficients

ABSTRACT Genetically constructed microbial biosensors for measuring organic pollutants are mostly applied in aqueous samples. Unfortunately, the detection limit of most biosensors is insufficient to detect pollutants at low but environmentally relevant concentrations. However, organic pollutants with low levels of water solubility often have significant gas-water partitioning coefficients, which in principle makes it possible to measure such compounds in the gas rather than the aqueous phase. Here we describe the first use of a microbial biosensor for measuring organic pollutants directly in the gas phase. For this purpose, we reconstructed a bioluminescent Pseudomonas putida naphthalene biosensor strain to carry the NAH7 plasmid and a chromosomally inserted gene fusion between the sal promoter and the luxAB genes. Specific calibration studies were performed with suspended and filter-immobilized biosensor cells, in aqueous solution and in the gas phase. Gas phase measurements with filter-immobilized biosensor cells in closed flasks, with a naphthalene-contaminated aqueous phase, showed that the biosensor cells can measure naphthalene effectively. The biosensor cells on the filter responded with increasing light output proportional to the naphthalene concentration added to the water phase, even though only a small proportion of the naphthalene was present in the gas phase. In fact, the biosensor cells could concentrate a larger proportion of naphthalene through the gas phase than in the aqueous suspension, probably due to faster transport of naphthalene to the cells in the gas phase. This led to a 10-fold lower detectable aqueous naphthalene concentration (50 nM instead of 0.5 μM). Thus, the use of bacterial biosensors for measuring organic pollutants in the gas phase is a valid method for increasing the sensitivity of these valuable biological devices.

scholarly journals A review on heterogeneous sonocatalyst for treatment of organic pollutants in aqueous phase based on catalytic mechanism

2018 ◽  
Vol 45 ◽  
pp. 29-49 ◽  
Author(s):  
Pengpeng Qiu ◽  
Beomguk Park ◽  
Jongbok Choi ◽  
Binota Thokchom ◽  
Aniruddha B. Pandit ◽  
...  
Keyword(s):  
Aqueous Phase ◽  
Organic Pollutants ◽  
Catalytic Mechanism
Sign in / Sign up

Export Citation Format

Share Document