Mining activities are often associated with significant environmental degradation,particularly due to the accumulation of mine tailings(MTs).These waste materials are frequently stored in dams or open ponds without ad...Mining activities are often associated with significant environmental degradation,particularly due to the accumulation of mine tailings(MTs).These waste materials are frequently stored in dams or open ponds without adequate treatment,posing serious risk of heavy metals(HMs)contamination to surrounding ecosystems.Given these challenges,restoration of MTs to mitigate their negative impacts has become highly important.This study attempts to compile different types of MTs,their characteristics,and associated issues such as acid mine drainage(AMD)and HMs contamination,along with other environmental impacts.It also explores the fundamentals of phytoremediation,highlighting key processes,recent advancements,benefits,limitations,and strategies for post-harvest management.The findings indicate that MTs are a major source of HM pollution and contribute significantly to environmental deterioration.Phytoremediation has emerged as a promising,cost-effective,and eco-friendly solution for MT restoration.In addition to mitigating contamination,phytoremediation enhances soil quality,prevents erosion,reduces HM leaching into groundwater,and improves the visual appeal of degraded sites.Research suggests that revegetating MT-contaminated soils with specific plant species can effectively remediate these areas,reducing HM leaching risks while improving soil properties.This review serves as a valuable resource for researchers working on MT restoration,offering insights into the latest advancements in phytoremediation technology and its potential to address the environmental challenges posed by MTs.展开更多
Introduction:Considering the problem of eutrophication of the water bodies,phosphate removal from water has emerged as a research of topical interest.The present study aims to investigate the efficacy of Canna lily-ba...Introduction:Considering the problem of eutrophication of the water bodies,phosphate removal from water has emerged as a research of topical interest.The present study aims to investigate the efficacy of Canna lily-based constructed wetland to remove phosphate from wastewater.The translocation of phosphate in plant tissue and its biochemical transformation in sediments is also studied to understand its accumulation and recirculation within the system.Results:The removal of phosphate stabilized at around 50%in the present study and plant uptake was found to be the major removal mechanism.Average removal was 167 mg/m2 day for total phosphate and 84 mg/m2 day for available phosphate for an initial loading rate of 200 mg/m2 day and 85 mg/m2 day,respectively,at a HRT of 24 h.Most of the phosphate concentrated in above ground tissue of plant and its relative accumulation was maximum in flowers.Fractionation of phosphate in sediments confirmed removal by sediments with an accumulation of apatite phosphate(Ca and Mg bound),but release of non-apatite form(Fe and Al bound).Conclusion:The study concludes that Canna-based constructed wetland can be an effective tool for phosphate removal from wastewater and sediments particularly under tropical conditions.Regular harvesting of above ground tissue of Canna can result in nutrient export from the system,whereas autochthonous addition may result in recirculation.展开更多
文摘Mining activities are often associated with significant environmental degradation,particularly due to the accumulation of mine tailings(MTs).These waste materials are frequently stored in dams or open ponds without adequate treatment,posing serious risk of heavy metals(HMs)contamination to surrounding ecosystems.Given these challenges,restoration of MTs to mitigate their negative impacts has become highly important.This study attempts to compile different types of MTs,their characteristics,and associated issues such as acid mine drainage(AMD)and HMs contamination,along with other environmental impacts.It also explores the fundamentals of phytoremediation,highlighting key processes,recent advancements,benefits,limitations,and strategies for post-harvest management.The findings indicate that MTs are a major source of HM pollution and contribute significantly to environmental deterioration.Phytoremediation has emerged as a promising,cost-effective,and eco-friendly solution for MT restoration.In addition to mitigating contamination,phytoremediation enhances soil quality,prevents erosion,reduces HM leaching into groundwater,and improves the visual appeal of degraded sites.Research suggests that revegetating MT-contaminated soils with specific plant species can effectively remediate these areas,reducing HM leaching risks while improving soil properties.This review serves as a valuable resource for researchers working on MT restoration,offering insights into the latest advancements in phytoremediation technology and its potential to address the environmental challenges posed by MTs.
文摘Introduction:Considering the problem of eutrophication of the water bodies,phosphate removal from water has emerged as a research of topical interest.The present study aims to investigate the efficacy of Canna lily-based constructed wetland to remove phosphate from wastewater.The translocation of phosphate in plant tissue and its biochemical transformation in sediments is also studied to understand its accumulation and recirculation within the system.Results:The removal of phosphate stabilized at around 50%in the present study and plant uptake was found to be the major removal mechanism.Average removal was 167 mg/m2 day for total phosphate and 84 mg/m2 day for available phosphate for an initial loading rate of 200 mg/m2 day and 85 mg/m2 day,respectively,at a HRT of 24 h.Most of the phosphate concentrated in above ground tissue of plant and its relative accumulation was maximum in flowers.Fractionation of phosphate in sediments confirmed removal by sediments with an accumulation of apatite phosphate(Ca and Mg bound),but release of non-apatite form(Fe and Al bound).Conclusion:The study concludes that Canna-based constructed wetland can be an effective tool for phosphate removal from wastewater and sediments particularly under tropical conditions.Regular harvesting of above ground tissue of Canna can result in nutrient export from the system,whereas autochthonous addition may result in recirculation.
