An enormous volume of electronic waste (e-waste) is currently being generated in Vietnam, threatening to render this country as an e-waste dumping region. Although the residents play an indispensable role in the e-waste management system, there is presently no or very limited studies available which involve public perceptions on the e-waste recycling in Vietnam. In this study, based on the theory of planned behavior (TPB), the structural equation modeling (SEM) was employed to examine the key factors influencing e-waste recycling behavioral intention of residents in Danang city, Vietnam. Data analyzed from 520 questionnaires revealed that environmental awareness and attitude toward recycling, social pressure, laws and regulations, cost of recycling, and inconvenience of recycling significantly directly affected residents’ behavioral intention, with laws and regulations being the strongest construct significantly to predict individuals’ intention. Of the five above-listed constructs, only inconvenience of recycling had a negative impact on residents’ recycling behavioral intention. Moreover, past experience showed the statistically significant negative effect on the inconvenience of recycling while it had no significant impact on behavioral intention. The influences of demographic variables on recycling behavioral intention were also discussed in this paper. The findings from this research may help policy-makers have a better understanding of residents’ e-waste recycling intention. That is very useful in paving the way for a successful e-waste recycling and management system not only in Vietnam, but also in other countries which are suffering from the same problems of e-waste.

Plastic pollution is a matter of deep concern that requires an urgent and international response, involving stakeholders at all levels. The rapid increase of single-use plastic and medical waste, especially in the context of COVID-19, has caused a drastic progression in the plastic pollution crisis on a global scale. To identify an efficient plastic waste management (PWM) system to tackle this major environmental problem, this study adopted importance-performance analysis and used logistic regression to identify key factors affecting citizens’ behavior to participate in PWM strategies in Vietnam. The results indicate that while the importance of all PWM solutions was considered to be high, their performance was rated at a low level, implying a sizable gap between perceived importance and performance of eleven solutions for PWM. The findings also show that solutions such as “offering zero-waste lifestyle seminars to citizens”, “having community engagement”, “using eco-friendly products”, and “imposing a ban on single-use plastics” are useful for the development of an effective environmental policy. Furthermore, it was found that the following characteristics have a significant influence on citizens’ participation in PWM solutions: (1) gender, (2) education level, (3) residential area, (4) employment status, and (5) citizens’ awareness and behavior towards plastic reduction. This study is expected to provide theoretical and empirical evidence for policymakers and authorities who are in charge of promulgating the necessary mechanisms and policies to promote the socialization of PWM.

In this study, the ability of a bench-scale simulated constructed wetland (CW) to remove organic matter (OM) and tetracycline (TC) from water was examined. The performance of CW was evaluated by varying the initial concentrations of the target compounds and the hydraulic retention times (HRTs). Findings showed that OM removal efficiencies were 55.2–80.8%, 28.1–71.9% and 72.1–79.7% for ultraviolet absorbance at 254 nm (UV-254), dissolved organic carbon (DOC) and soluble chemical oxygen demand (sCOD) respectively, under 1 day-HRT, whereas higher initial DOC concentration achieved better removal efficiencies. Changing from 1 day-HRT to 2 day-HRT, the removal efficiency of OMs remained practically unchanged, while that of NH₃-N increased considerably, from 61.7% to 73.0%, implying that the removal of ammonia in CW needs a longer time for complete treatment. CW also showed an excellent performance in removing TC, especially in the first two hours of operation through the absorption process. In addition, the findings from this research revealed an improvement in effluent water quality when photocatalysis (TiO₂/α-Al₂O₃, with ultraviolet A (UVA) irradiation) was used as the post-treatment following CW, presented by the increase in removal efficiency of OMs of the combined system compared to that of CW alone. This study points to the possible and promising application of the low-cost water treatment system for dealing with OMs and TC in water.

The transition to distance learning during COVID-19 has completely overturned the teaching-learning way of the world's education system. Based on the technology acceptance model, this study was conducted to explore what factors might affect the teachers' attitudes toward the online teaching regime. Structural equation modeling was employed to analyze data drawn from high school teachers in Vietnam. The findings presented that the perceived usefulness of digital teaching was the most fundamental determinant of teachers' attitudes and played a mediating role in linking the perceived ease of use to attitude. As an external factor, school assistance was significantly associated with both perceived ease of use and perceived usefulness, which provides facilitating conditions to ensure successful adoption of online teaching. Age and teaching experience also had a significant influence on external assistance and teachers' attitudes, respectively. This investigation sheds light on promoting digital transformation in the education sector in Vietnam and other countries.

Purpose: The study aims to seek the factors affecting perceived online learning enjoyment among university students across Viet Nam.Design/methodology/approach: Based on the concept of the technology acceptance model (TAM), this research adopts structural equation modelling (SEM) to analyse data collected from 795 undergraduate students who have gained the experience of online courses in the period of the COVID-19 pandemic.Findings: The results of this study indicate that both perceived ease of use and perceived usefulness are significant predictors of students' perceived enjoyment in online courses while perceived obstacles are not its direct antecedents. The correlation between perceived ease of use and perceived usefulness is also affirmed in this study. Besides, differences are found based on students' characteristics including gender, grade and academic major.Research limitations/implications: As online learning turns education to be learner-centred, it is crucial to have a better understanding of students' perceptions toward this advanced learning method. The insights found in this research may be of interest to educational administrators, aimed at achieving the digital transformation success in education which may adapt to the current trend of Industrial Revolution 4.0.Originality/value: According to the best of the knowledge, this research is the first to explore the effect of the group of three predictors including perceived ease of use, perceived usefulness and perceived obstacles on the students' learning enjoyment toward the online learning method, especially in the context of Viet Nam.