Environmental risks of plastic losses from landfills: A comparative study of divisional cities in Bangladesh

IF 5.4 Q2 ENGINEERING, ENVIRONMENTAL Journal of hazardous materials advances Pub Date : 2024-10-28 DOI:10.1016/j.hazadv.2024.100507
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Abstract

In Bangladesh, where nearly 95% of landfills are unsanitary or open dumps, these sites are significant contributors to environmental plastic pollution, making it a critical issue for the country. This study presents a framework to quantify the risk index of plastic losses from landfills across the eight major divisional cities of Bangladesh. The assessment focuses on three key components: hazard, exposure, and vulnerability. The hazard index is derived from local weather and climate data, exposure is evaluated based on the proximity of water bodies and urban areas, and vulnerability is measured using population, landfill, and waste production data. The study employs a Data Envelopment Analysis (DEA) approach to quantify and compare the levels of exposure, vulnerability, and overall risk among the cities. The results reveal that Sylhet is located in a severe hazard zone, Dhaka faces severe exposure and vulnerability, and Chittagong experiences very high levels of exposure and vulnerability. Overall, Dhaka is categorized as severe in risk, while Chittagong and Sylhet are classified as very high risk, with other cities at comparatively safer risk levels. Cities identified with severe to high-risk levels must urgently address plastic losses. This city-wise assessment provides valuable insights for urban planners and policymakers, enabling them to identify and prioritize cities in urgent need of interventions to mitigate environmental plastic losses, and to focus on the reduction, substitution, and management of plastics.

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垃圾填埋场塑料流失的环境风险:孟加拉国分区城市比较研究
在孟加拉国,近 95% 的垃圾填埋场都是不卫生或露天垃圾场,这些填埋场是造成环境塑料污染的重要因素,使其成为该国的一个关键问题。本研究提出了一个框架,用于量化孟加拉国八个主要分区城市垃圾填埋场塑料损失的风险指数。评估重点关注三个关键部分:危害、暴露和脆弱性。危害指数根据当地天气和气候数据得出,暴露指数根据水体和城市地区的邻近程度进行评估,脆弱性则使用人口、垃圾填埋场和废物生产数据进行衡量。研究采用了数据包络分析(DEA)方法来量化和比较各城市的暴露程度、脆弱性和总体风险。结果显示,锡尔赫特位于严重危险区,达卡面临严重的暴露和脆弱性,吉大港的暴露和脆弱性水平非常高。总体而言,达卡被归类为风险严重的城市,吉大港和锡尔赫特被归类为风险极高的城市,其他城市的风险水平相对较安全。被确定为严重至高风险级别的城市必须紧急处理塑料损失问题。这项城市评估为城市规划者和决策者提供了宝贵的见解,使他们能够确定急需采取干预措施以减少环境塑料损失的城市并确定其优先次序,同时重点关注塑料的减少、替代和管理。
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来源期刊
Journal of hazardous materials advances
Journal of hazardous materials advances Environmental Engineering
CiteScore
4.80
自引率
0.00%
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0
审稿时长
50 days
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