Mercenaria mercenaria shell: Coagulation-flocculation studies on colour removal by response surface methodology and nephlometric kinetics of an industrial effluent

Modeling and Optimization of Coagulation-Flocculation Process to Remove High Phosphate Concentration in Wastewater from a Metal-Mechanic Industry

“…In this context, the response surface methodology (RSM) is an appropriate strategy to model CF process (Khettaf et al 2021;Nayeri and Mousavi, 2020). RSM is a statistical technique that allows representing the in uence of a set of variables over the response of interest using a minimum number of experiments (Iloamaeke et al 2021;Myers and Montgomery, 1971). RSM has been proven as a reliable strategy to optimize CF process in several studies; such as e uents from the textile industry to reduce color, turbidity and chemical oxygen demand (COD) (Dotto et al 2019;Sakhi et al 2020), a tannery industry e uent to reduce COD (Pinto et al 2019), a municipal wastewater to reduce turbidity, COD and biochemical oxygen demand (BOD) (Joaquin and Nirmala, 2019), an e uent obtained from a biodiesel production plant to reduce COD, turbidity and solids (Daud et al, 2018), and an e uent from the oil industry to reduce COD, turbidity, color and solids (Singh and Kumar, 2020).…”

Enhancement of the Stability of W/O/W Double Emulsion by Chitosan Modified Rice Husk Silica

“…Let alone its role in strengthening the interfacial layer between oil and water, which became the main concern in this article. This principle has been exploited in wastewater treatment using the coagulationflocculation process described in the recent studies (Bahrodin et al, 2021;Fard et al, 2021;Iloamaeke et al, 2021). The pollutant removal efficiency was highly dictated by the wastewater pH depending on the coagulant agent and its mechanism (Bahrodin et al, 2021;Sibiyaet al, 2021).…”

“…Alum as the coagulant became soluble and positively charged in the acidic environment was easily adsorbed onto the negatively charged surface of the colloids leading to charge neutralization and pollutant removal (Bahrodin et al, 2021). Furthermore, the color removal efficiency increased as pH decreased from 10 to 2 when Mercenaria mercenaria shell with a zero-point charge value (pHzpc) of 7.8 used as the coagulant became positively charged thus, enhancing the coagulation of negatively charged colloid particles making them to floc due to the increase in the force of attraction which led to charge neutralization (Iloamaeke et al, 2021). In this research, rice husk silica in combination with chitosan was used to stabilize food-based W/O/W double emulsion.…”