This review discusses the development of green adsorbents for environmental remediation, focusing on their synthesis methods, ecotoxicity, and reusability. Green adsorbents are typically made from renewable or recycled resources, have minimal toxic effects, and are synthesized with low chemical and energy footprints. They are designed to be highly reusable and not contribute to additional waste or contamination. The review highlights the use of low-cost or waste materials to produce sorbents for contaminant immobilization in soil and water systems. The regeneration of adsorbents is crucial for evaluating their cost-effectiveness and long-term environmental impact. The review evaluates sustainable sorbent materials, emphasizing their green and eco-friendly qualities for a circular economy and their contribution to the United Nations Sustainable Development Goals (UNSDG). It discusses synthesis techniques, ecotoxicity, and the potential for reusing adsorbents. The review provides insights for researchers and practitioners interested in developing and applying green adsorbents, including bio-based carbon, char, and fibrous materials for soil and water remediation. Green adsorbents are made from naturally occurring, easy-to-process minerals or renewable resources such as bio-based polymers, natural fibers, agricultural waste, and industrial waste. These materials help reduce dependency on non-renewable resources and minimize carbon footprints. Eco-friendly adsorbents are characterized by low toxicity and biodegradability, and are designed to have minimal environmental impact while efficiently remediating pollutants or toxins from air, soil, water, or other media. Green adsorbents aim to reduce their adverse effects on ecosystems and human health, in contrast to traditional adsorbents, which may degrade and release harmful chemicals into the environment. These adsorbents are easily reusable through recyclability with some downgrading of the adsorption properties or after a low-cost regenerative process by which the original properties of the adsorbent can be restored. The review discusses the use of waste materials for the synthesis of low-cost green adsorbents, including clays, zeolites, recycled materials, and agricultural and industrial wastes. This is an increasing trend in this research area. The review also focuses on advancements in synthesizing adsorbent materials, explicitly analyzing the assessment of preparation techniques, consequences for ecotoxicity, and potential for reuse or regeneration. Various preparation techniques, including chemical synthesis, physical modification, and bio-based approaches, have been evaluated for their efficiency in improving surface characteristics and adsorption capacity. The benefits and drawbacks of every technique are discussed to offer insights into the most promising strategies for producing adsorbent materials. Additionally, the review looks at the sustainable attributes of potential sorbent materials for environmental remediation, including the toxicity, reusability, and regeneration of the specific sorbent material(s). This understanding can be extended to developing "green" adsorbents for environmental remediation.This review discusses the development of green adsorbents for environmental remediation, focusing on their synthesis methods, ecotoxicity, and reusability. Green adsorbents are typically made from renewable or recycled resources, have minimal toxic effects, and are synthesized with low chemical and energy footprints. They are designed to be highly reusable and not contribute to additional waste or contamination. The review highlights the use of low-cost or waste materials to produce sorbents for contaminant immobilization in soil and water systems. The regeneration of adsorbents is crucial for evaluating their cost-effectiveness and long-term environmental impact. The review evaluates sustainable sorbent materials, emphasizing their green and eco-friendly qualities for a circular economy and their contribution to the United Nations Sustainable Development Goals (UNSDG). It discusses synthesis techniques, ecotoxicity, and the potential for reusing adsorbents. The review provides insights for researchers and practitioners interested in developing and applying green adsorbents, including bio-based carbon, char, and fibrous materials for soil and water remediation. Green adsorbents are made from naturally occurring, easy-to-process minerals or renewable resources such as bio-based polymers, natural fibers, agricultural waste, and industrial waste. These materials help reduce dependency on non-renewable resources and minimize carbon footprints. Eco-friendly adsorbents are characterized by low toxicity and biodegradability, and are designed to have minimal environmental impact while efficiently remediating pollutants or toxins from air, soil, water, or other media. Green adsorbents aim to reduce their adverse effects on ecosystems and human health, in contrast to traditional adsorbents, which may degrade and release harmful chemicals into the environment. These adsorbents are easily reusable through recyclability with some downgrading of the adsorption properties or after a low-cost regenerative process by which the original properties of the adsorbent can be restored. The review discusses the use of waste materials for the synthesis of low-cost green adsorbents, including clays, zeolites, recycled materials, and agricultural and industrial wastes. This is an increasing trend in this research area. The review also focuses on advancements in synthesizing adsorbent materials, explicitly analyzing the assessment of preparation techniques, consequences for ecotoxicity, and potential for reuse or regeneration. Various preparation techniques, including chemical synthesis, physical modification, and bio-based approaches, have been evaluated for their efficiency in improving surface characteristics and adsorption capacity. The benefits and drawbacks of every technique are discussed to offer insights into the most promising strategies for producing adsorbent materials. Additionally, the review looks at the sustainable attributes of potential sorbent materials for environmental remediation, including the toxicity, reusability, and regeneration of the specific sorbent material(s). This understanding can be extended to developing "green" adsorbents for environmental remediation.