Constructed Wetlands (CWs) are examples of nature-based solutions that mimic the biogeochemical processes that occur in natural wetland systems. They are often applied to remove pollutants from different types of wastewater. Besides water treatment, CWs can also provide other ecosystem services like water reuse for irrigation purposes, biomass for energy production and enhance local biodiversity. Based on life cycle assessments data, CWs have shown to be cost-effective and a low environmental impact technology. This study aims to review and evaluate environmental impact of the main materials that make up the components of CWs, as well as combining the concept of water circularity into urban wastewater management. Intensified strategies to tackle rate-limiting factors for improving CW performance have also been explored. A final optimized design with selected sustainable materials was proposed for implementation in Macao SAR, a city in China with the second highest population density in the world. We attempt to calculate the area needed to treat the post-primary treated wastewater from the Macao Peninsula wastewater treatment plant and further locate suitable areas for CW implementation. It would also provide an insight into coupling nature-based solutions with urban wastewater treatment, bioenergy production and at the same time, achieve circular water management. The present study will enable decision-makers to look at wastewater management in a different perspective other than traditional hard-engineering projects. 人工濕地是一種基於自然濕地系統發生的生物化學過程的自然解決方案。它們通常用於去除不同類型污水中的污染物。除水處理外，人工濕地還可提供其他生態系統服務，如灌溉水重用、生物能源生產以及增強當地的生物多樣性。根據生命週期評估數據，人工濕地對環境影響較小且具有成本效益。此研究旨在評估人工濕地的主要材料對環境的影響，將水循環的概念納入城市廢水管理中，並探索提高人工濕地去除污染物效率的策略。我們將設計一種採用可持續性材料及高效除污染物的人工濕地，在世界人口密度第二高的澳門特別行政區實施。我們將根據經澳門半島污水處理廠進行初處理後的污水量，計算所需的人工濕地面積，並在澳門半島選出適合實施本設計方案的人工濕地選址。此研究項目將結合自然解決方案與城市污水處理、生物能源生產及實現城市循環水管理。這項研究擬於提供不同於傳統“硬工程”項目的城市污水管理方案予決策者。