Social factors influencing waste separation behaviour among the multi-class residents in a megacity: A Survey analysis from a community in Bangkok, Thailand

Abstract

Effective waste separation at the source is vital for sustainable waste management globally. However, motivating people to participate in waste separation can be challenging, especially in developing countries' megacities, where rapid urbanization and surging solid waste trends are prevalent. A survey conducted in Bangkok, Thailand, provides valuable insights into the factors that encourage waste separation at the source among individuals from diverse backgrounds. The study involved 456 respondents, an effect size of 0.35, a 95 % confidence level, and a 5 % margin of error. The sample groups were divided into four modules based on their lifestyles and analysed waste separation intention and behaviour using an extended theory of planned behaviour and a structural equation model. The results showed that attitude is a critical and fundamental factor influencing intention, while intention and trust in the recycling system are the most significant factors influencing waste separation behaviour. Furthermore, the significant factors influencing waste separation intention and behaviour for each module differ, highlighting the need for specific strategies to promote waste separation among individuals with diverse lifestyles in megacities. These findings are of immense value and can be confidently used by governors or policymakers worldwide to combat waste management challenges.