A pragmatic shift is ongoing in waste material management and wastewater treatment technology due to the large amount of waste production worldwide and the necessity for cheap adsorbents to reduce wastewater treatment costs. Improvements in the circular economy and energy recovery from waste materials is another fast-growing concept for promoting sustainability and a greener environment. This review study endeavours to integrate the concept of wastewater treatment by waste materials (agricultural residue, industrial and municipal waste, organic and inorganic sources) and utilization of the used waste adsorbents for value-added products through further treatment. Although very few experimental studies were performed on this concept, this study summarizes the potential valuable products such as regenerated adsorbents, biofuel, soil amendment supplements and cementitious material by utilizing waste adsorbent. Production mechanisms of valuable products is discussed comprehensively. This review also documents the major emerging contaminants, the diverse waste materials as potential adsorbent candidates and conversion processes from waste into adsorbents. The outcome of this review promotes the utilization of waste into multiple useful products generation which may improve waste management and boost the circular economy. The integrated applications of this review describe the commercial window available to accumulate waste materials for large scale applications. Further, sources of energy and nutrients extracted from waste materials after treating polluted water in industries, municipal units and animal husbandries can be a significant contributor to commercial viability in the future.

废物管理和废水处理技术正在发生务实的转变，原因是世界范围内产生了大量的废物，并且有必要使用廉价的吸附剂来降低废水处理成本。循环经济的改善和废料的能量回收是促进可持续性和绿色环境的另一个快速增长的概念。这篇综述性研究致力于将废料（农业残留物，工业和城市废物，有机和无机源）的废水处理概念以及通过进一步处理将废旧吸附剂用于增值产品的方法进行整合。尽管很少有人对此概念进行实验研究，但该研究总结了潜在的有价值的产品，例如再生吸附剂，生物燃料，通过利用废物吸附剂来补充土壤改良剂和胶凝材料。全面讨论了有价值产品的生产机制。该评价还记录了主要的新兴污染物，作为潜在吸附剂候选物的各种废物以及从废物到吸附剂的转化过程。审查的结果促进了废物在多种有用产品中的利用，这可以改善废物管理并促进循环经济。本综述的综合应用描述了可用于积累大规模应用废料的商业窗口。此外，在处理工业废水后，从废料中提取的能量和养分的来源，