Correction to "Adsorption of Methyl Orange from an Aqueous Solution onto a BPPO-Based Anion Exchange Membrane".

[This corrects the article DOI: 10.1021/acsomega.2c03148.].

Green economy performance and sustainable development achievement: empirical evidence from Saudi Arabia.

As a pillar of United Nations, the Kingdom of Saudi Arabia pursues to greener its economy and achieve the Sustainable Development Goals of the 2030 Agenda. The green economy represents a catalyzer for sustainable development in its three dimensions -economic, social and environmental- aiming to improve human well-being and social equity and reduce environmental risks. However, the relevant previous studies lacked the role of green economy on sustainable development for the Saudi Arabia. For this purpose, this paper aims to explore how green is the kingdom and analyze its performance toward sustainable development from 2015 to 2020. To do so, we adopt the EEPSE Green Economy Index that combines educational, economic, political, societal and environmental indicators associated with the pillars of the Quintuple Helix Innovation Model. In this study, this index is composed of 42 indicators related to the green economy and the sustainable development. The empirical results suggest that the Saudi Arabia witnessed a significant progress of EEPSE GEI score. In addition, the findings support that the performance of the kingdom regarding the green economy is affected after the COVID-19 crisis. Thus, the paper provides original visions for policy makers to encourage the transition to green economy which constitutes the main locomotive to attain the economic, social and environment sustainability for the kingdom.

Adsorption of Methyl Orange from an Aqueous Solution onto a BPPO-Based Anion Exchange Membrane.

In this research, the development of a novel brominated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO)-based homogeneous anion exchange membrane (AEM) via the solution casting method was reported. Fourier transform infrared spectroscopy was used to confirm the successful development of the BPPO-based AEM. The prepared AEM showed excellent thermal stability. It exhibited an ion exchange capacity of 2.66 mg/g, a water uptake (W R) of 68%, and a linear swelling ratio of 31%. Methyl orange (MO), an anionic dye, was used as a model pollutant to evaluate the ion exchange ability of the membrane. The adsorption capacity of MO increased with the increase in contact time, membrane dosage (adsorbent), temperature, and pH while declined with the increase in initial concentration of MO in an aqueous solution and molarity of NaCl. Adsorption isotherm study showed that adsorption of MO was fitted well to the Freundlich adsorption isotherm because the value of the correlation coefficient (R 2 = 0.974) was close to unity. Adsorption kinetics study showed that adsorption of MO fitted well to the pseudo-second-order kinetic model. Adsorption thermodynamics evaluation represented that adsorption of MO was an endothermic (ΔH° = 18.72 kJ/mol) and spontaneous process. The AEM presented a maximum adsorption capacity of 18 mg/g. Moreover, the regeneration of the prepared membrane confirmed its ability to be utilized for three consecutive cycles. The developed BPPO-based AEM was an outstanding candidate for adsorption of MO from an aqueous solution.