A highly efficient method with low energy and water consumption in biodegradation of total petroleum hydrocarbons of oily sludge.

The hydrocarbons in petroleum sludge are environmental pollutants. It is crucial to eliminate this type of pollution. In this study, a comprehensive and operational study has been conducted on the total petroleum hydrocarbons (TPH) biodegradation in oily sludge.

A simple, fast and low-cost method for the efficient separation of hydrocarbons from oily sludge.

Since a large amount of sediment organic matter and hydrophobic organic compounds presented in oily sludge sediments in petroleum storage tanks, separation or degradation of these compounds are environmentally important. Therefore, the effect of four solvents and their combinations on the extraction of hydrocarbons in oily sludge from the dredging of petroleum storage tanks in Iran was investigated in this study. Besides, the number of extraction steps and the temperature were also investigated, and the mechanical shaking method was introduced and compared with that of mixing and Soxhlet.

Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Drop with Central Composite Design for the Spectrofluorometric Determination of Naproxen.

A quick, simple and efficient method for extraction, preconcentration, and determination of naproxen in water and plasma specimens with acceptable recovery by dispersive liquid-liquid microextraction based on solidified floating organic drop with spectrofluorimetry is presented. Various parameters affecting the extraction efficiency are optimized by the Central Composite Design. Moreover, under optimal conditions (120 μL 1-Undecanol with 1 mL Ethanol, pH = 3.

Carbon Dots Green Synthesis for Ultra-Trace Determination of Ceftriaxone Using Response Surface Methodology.

The present study sought to develop a facile and green synthetic approach for producing fluorescent carbon dots (CDs) from a natural biomass using aqueous extraction of carbonized blue crab shell. Spherical carbon dots (6.00 ± 3.

Immobilization of hexavalent chromium in cement mortar: leaching properties and microstructures.

Stabilization and solidification (s/s) of heavy metals by cementitious materials are one of the effective methods in hazardous waste management. In cement alkaline environment, Cr(VI) compounds appear in the form of chromate anion (CrO), which is highly soluble; it makes the implication of the s/s method challenging. Therefore, it is important to study the amount of chromium leaching from cementitious materials.