Modeling of adsorption isotherms of oil content through the electrocoagulation treatment of real oily wastewater

Silver(I) recovery on sulfur-containing polymeric sorbents from chloride solutions

“…The linear form of the Jovanovic isotherm can be shown using the following relationship (eq. 12) (Aljaberi et al, 2020, Ayawei et al, 2017, Bharathi et al 2017:…”

Electrocoagulation treatment of high saline oily wastewater: evaluation and optimization

“…The drilling oil sites contain numerous types of pollutants that may be categorized into organic (petroleum hydrocarbons) and inorganic compounds such as oil content, COD, BOD, TOC, turbidity, TDS, TSS, cyanide, ammonia and heavy metals [2]. They differ in their concentration according to the locations of the crude oil wells and their depth (1-40000 ppm) [3,4]. The percentage of oily wastewater amounts presented in produced crude oil ranging from 0.4 to 0.6 [5].…”

“…In order to overcome this kind of pollution, several techniques had been employed for treating saline oily wastewater [2,8,9,10] such as the conventional technologies like gravity sedimentation and dewatering, but the biological treatment methods are limited in application because the high salinity wastewater (>1% salt) which leads to loss of cell activity [6]. The performance of any treatment method is characterized by the removal efficiency, the time required to accomplish the treatment, secondary contamination produced, and the cost of construction, operating and maintenance [3], but they possess some notable drawbacks that minimize their efficiencies and applications [2,11]. Therefore, an effective treatment method should be employed to overcome the disadvantages of using conventional treatment technologies and recovery of water under contingent limits [11].…”

“…Electrocoagulation is a type of electrochemical processes which considered as an effective method for the treatment of oily wastewater because it possesses many merits such as simple apparatus, less reaction time, no chemicals added and low consumption of energy and electrodes [2,4,14] beside that, its ability to be employed as a pre-treatment method or in hybrid systems with other treatment methods such as adsorption and ionic exchange processes [1,5]. In contrast to other methods of wastewater treatment, the electrocoagulation technique requires only simple equipment and less time of treatment, but the mechanism of oil removal from oily wastewater is complicated owing to their physicochemical parameters [3].…”

“…Metal cations, such as Al 3þ or Fe 2þ are released due to the dissolution of the anode, while the hydrogen gas and hydroxyl ions (OH À ) are generated at the cathode [3,8]. Electro-coagulants, such as Al(OH) 3 , are formed due to the chemical reactions that occur between different ions (Eqs.…”