Principles and potential of the anaerobic digestion of waste-activated sludge

Hydroxyl radicals based advanced oxidation processes (AOPs) for remediation of soils contaminated with organic compounds: A review

Remediation of soils contaminated with polycyclic aromatic hydrocarbons (PAHs).

Remediation approaches for polycyclic aromatic hydrocarbons (PAHs) contaminated soils: Technological constraints, emerging trends and future directions.

Pressurized hot water extraction (PHWE).

On reduction in the surface tension of water due to magnetic treatment

Hot water extraction with in situ wet oxidation: PAHs removal from soil

During gas production from gas condensate reservoirs, as the bottom hole pressure drops below the dew point pressure, the liquids drop out and form condensate banking resulting in significant loss of gas and condensate productivity. A new method for stimulating gas-condensate wells, is changing the rock wettability in near well-bore regions by chemical treatments. In this study, a new chemical treatment was developed to alter the wettability of carbonate rocks from water-wet to intermediate gas-wet in order to enhance gas relative permeability. The treatment involves the use of an anionic fluoro-surfactant mixture with an optimized concentration and a solvent. Contact angle and spontaneous imbibition experiments were run to measure the wettability alterations. Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDAX) and adsorption isotherms were also performed to monitor the amounts of surfactant solutions which were adsorbed on the rock surface. The increase in gas relative permeability was quantified by comparing the permeability before and after chemical treatments. The contact angles were increased and water and oil imbibitions were reduced significantly after the treatments. Finally, core flood tests revealed that the optimized treatment could enhance the gas relative permeability by a factor of 1.7 which demonstrated the ability in wettability alteration at reservoir conditions.

Wettability alteration in gas-condensate carbonate reservoir using anionic fluorinated treatment

Essential oil was extracted from lavender using supercritical carbon dioxide by means of a newly developed periodic static-dynamic (PSD) procedure and the conventional semicontinuous (SC) technique. Applying GC-FID analysis in conjunction with Box-Behnken design, an optimum overall extraction yield (94.4 %) was obtained via PSD in contrast to 90 % for the SC method. The results indicate that supercritical fluid extraction is a viable technique for separation of constituents such as linalyl acetate, linalool, fenchone, and camphor for pharmaceutical and medicinal applications. Furthermore, a substantial reduction of energy consumption and solvent consumption is achieved with the developed PSD process compared to the conventional SC method.

Optimization of Supercritical Extraction of Linalyl Acetate from Lavender via Box‐Behnken Design

Hot water extraction with in situ wet oxidation: kinetics of PAHs removal from soil.

Ali A. Dadkhah

Papers

On reduction in the surface tension of water due to magnetic treatment

Hot water extraction with in situ wet oxidation: PAHs removal from soil

Wettability alteration in gas-condensate carbonate reservoir using anionic fluorinated treatment

Optimization of Supercritical Extraction of Linalyl Acetate from Lavender via Box‐Behnken Design

Hot water extraction with in situ wet oxidation: kinetics of PAHs removal from soil.