Decolourization of aqueous Methylene Blue solutions by corn stalk: modeling and optimization

Methylene blue removal using prepared activated carbon from grape wood wastes: adsorption process analysis and modeling

“…pH ZPC (pH . 5), the amount of hydroxyl ions (OH À ) in the solution increases, which cause to increase the number of negatively charged sites and increase interaction between positive dye molecules and negative surface of the prepared AC (Table 3) (Hassan et al 2017;Mousavi et al 2020). Zhang et al (2015) reported that the MB adsorption rate over natural palygorskite adsorbent improves with increasing the pH of solution (Zhang et al 2015b).…”

“…Nowadays, activated carbon (AC) due to its well-developed porous structure, massive surface area, fast removal speed and excellent adsorption ability is one of the most well-known and widely used adsorbents in water and wastewater treatment (Kosheleva et al 2019;Li et al 2020). AC has several advantages over other adsorbents, such as high efficiency to remove odor and taste, simple process design, high selectivity at the molecular level, low energy consumption, reusability, high adsorption potential, and resistance in corrosive and toxic environments (Seidmohammadi et al 2015;Ao et al 2018;Nayeri & Mousavi 2020). One of the major disadvantages of AC is its high cost of production, which limits its application extensively (Selvanathan et al 2015).…”

Optimization of Biodiesel Production from Sunflower Oil Transesterification using Ca-K/Al2O3 Nanocatalysts

“…The impact on the response was raised by raising the value of the F parameter and reducing the P parameter. As can be seen, the remarkable parameters of reaction were included (most to least significant) [24]: methanol-to-oil ratio (14.52) > weight fraction of the catalyst (9.12) > second-order effect of methanol-to-oil ratio (− 0.41) > second-order effect of the weight fraction of the catalyst (− 0.38) > interaction between methanol-to-oil ratio and weight fraction of the catalyst (-0.18). The F value and the P value were applied to measure the significance of the coefficients (see Table 4).…”

“…The objective of experimental design is to attain efficiency (to obtain more information from fewer experiments) and focus (to gather only the information you really require) [22,23]. Central composite design is the most common design of response surface methodology (RSM); it is efficient and flexible, providing sufficient data on the effects of variables and overall experimental error with a minimu m number of experiments [24,25].…”

A comprehensive review on the removal of antibiotics from water and wastewater using carbon nanotubes: synthesis, performance, and future challenges

“…Among the aforementioned methods, the adsorption process can be widely applied in the elimination of pollutants because of its merits such as high selectivity, low energy consumption, high reliability, low cost, simple design, design flexibility, non-toxic nature, and simple operation. 20,21 However, it also has some drawbacks such as the adsorption efficiency can be restricted by various factors such as mass transport resistance, it is difficult to separate the adsorbent, the production of adsorbents is expensive and the spent adsorbents need to be disposed. [22][23][24] Hence, researchers have attempted to develop new adsorbents, namely, nano adsorbents, to improve the efficiency of conventional adsorbents and overcome their shortcomings.…”