Removal of hydrogen sulphide from high salinity wastewater by emulsion liquid membrane

Abstract

This article presents a experimental study on the removal of hydrogen sulphide (H 2 S) from high salinity wastewater by emulsion liquid membrane (ELM). The ELM contains diethanolamine (DEA) as carrier, kerosene as solvent and span 80 as surfactant. The fundamental parameters (viz. surfactant concentration, carrier concentration, strip phase concentration, phase ratio, agitation speed and time) affecting the removal of H 2 S were investigated to select the optimum combination of process parameters. The results showed the optimal governing parameters were: inner phase NaOH aqueous solution 2.0 wt%, Surfactant (span 80) 5.0 vol%, carrier (DEA) 6.0 vol%, treat ratio 1:5, agitation speed 250 rpm, agitation time 15 min, respectively, and removal efficiency of 97.3% was achieved.

Development of Resource Processing Technology for Heavy Oil Sludge

“…The ultrasonic wave propagating in a liquid medium will produce thermal effect, sonoluminescence and cavitation effect Its cavitation plus the scrubbing action of the surfactant can significantly improve the deoiling rate of the oily sludge. Zhigang Yang [17] explored the influence of ultrasound in the degreasing effect of the oily sludge, in surface properties of the sludge particles and in the recovered crude oil properties, and also explored the desorption equilibrium of the oil in the ultrasonic field and studied the oily sludge degreasing mechanism under the ultrasound. In the field of ultrasonic treatment technology, demulsification deoiling efficiency is affected by ultrasonic frequency, sound intensity, the treatment temperature, irradiation time and the sediment grain size and other factors [18].…”

Hydrogen Sulphide Sequestration with Metallic Ions in Acidic Media Based on Chitosan/sEPDM/Polypropylene Composites Hollow Fiber Membranes System

“…Another strategy consists in oxidizing sulfur from hydrogen sulfide to higher oxidation states (4+ or 6+) and recovering it as sulfuric acid or sulfites, but mostly as sulfuric acid and sulfate [ 16 , 17 , 18 , 19 ]. Biological degradation can also be an economical and effective means of hydrogen sulfide removal [ 20 ], while membrane or hybrid processes involving membranes have become more and more popular [ 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ].…”