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Topic Review
Prospects of Photovoltaic Materials Recycling and Disposal
The End-of-Life (EoL) management of photovoltaic (PV) modules has always present significant concern to the scientific community, especially when large scale emergence of PV waste is expected in the near future. As PV waste contains rare and hazardous materials as its composition, its unregulated disposal poses the problem of polluting the environment and wastage of potentially usable resources. Hence, researchers have delved into the recycling and recovery of materials from PV waste to improve the sustainability of the EoL management of PV modules.
  • 544
  • 21 Jul 2022
Topic Review
Quantifying the UDS Hydraulic and Social Resilience
Various approaches to quantifying resilience have sparked debate in past years. Researcher measures the social and hydraulic resilience of an Urban Drainage System (UDS) using two methodologies, i.e., a proposed index-based framework and a parametric-based Multi-Criteria Decision Making (MCDM) method. The former positions flexibility as a key property of the resilience concept, and after quantifying four characteristics of a flexible system, measures the flood resilience based on quantifying the two resilience components, i.e., flexibility and resistance; while. The latter calculates the resilience through a linear combination of the actual values and relative weights for different UDS sub-characteristics which best describe the resiliency of the system. 
  • 405
  • 12 Jul 2022
Topic Review
Underground Plastic Recharge Chambers in Stormwater Management
Land development typically requires stormwater control measures (SCMs) to limit runoff volume, reduce peak flow, delay discharge to streams, and reduce pollutant loads to receiving waters, with the ideal goal of mimicking the natural hydrologic system. Life cycle assessment is used to systematically evaluate the environmental impact of underground plastic recharge chambers (RCs) used for stormwater management.  Using cradle-to-gate life cycle assessment and a functional unit of 1 m3 stormwater capacity, different RC structure types, manufacturing processes and materials are considered. The inventory is based on various commercially available RCs, including injection-molded or extruded polypropylene and polyvinylchloride polymers and typical installation materials and methods. A new dataset is developed to estimate the manufacture and use of recycled polypropylene granulate. TRACI 2.1 is used to investigate the midpoint life cycle impact assessment metrics, acidification, eutrophication, global warming, and fossil fuel resources. 
  • 510
  • 06 Jul 2022
Topic Review
Artificial Intelligence in Water Treatment and Monitoring
Artificial-intelligence methods and machine-learning models have demonstrated their ability to optimize, model, and automate critical water- and wastewater-treatment applications, natural-systems monitoring and management, and water-based agriculture such as hydroponics and aquaponics. In addition to providing computer-assisted aid to complex issues surrounding water chemistry and physical/biological processes, artificial intelligence and machine-learning (AI/ML) applications are anticipated to further optimize water-based applications and decrease capital expenses. Poor data management, low explainability, poor model reproducibility and standardization, as well as a lack of academic transparency are all important hurdles to overcome in order to successfully implement these intelligent applications. Recommendations to aid explainability, data management, reproducibility, and model causality are offered in order to overcome these hurdles and continue the successful implementation of these powerful tools. 
  • 4.2K
  • 01 Jul 2022
Topic Review
Phytoremediation of Domestic Wastewater
A circular economy (CE) based strategy is essential to progress toward Sustainable Development Goals (SDG). CE is centered on the conversion of waste into meaningful products and resource efficiency with the objective of promoting resource reuse. This study presents the potential of CE approaches in the phytoremediation of wastewater and energy recovery using hydroponic tanks. The integration of phytoremediation with bioenergy, construction and lifespan of hydroponic tanks in phytoremediation of wastewater, selection of aquatic plants, and the expected challenges in the implementation of CE in phytoremediation of wastewater were discussed. It further elucidates a comprehensive circularity assessment methodology that would enable and support a strategic CE framework for phytoremediation techniques in wastewater treatment. Additionally, a complete view of the feedstock conversion process into valuable end products was discussed in this CE strategic study. The findings obtained provided insights into the relative growth rate of the plant-based biomass harvested from the phytoremediation of domestic wastewater. It also provided information on the economic and technical feasibility of wastewater phytoremediation using hydroponic tanks for simultaneous recovery of treated water and plants’ biomass to enable large-scale implementation. Furthermore, optimizing resource recovery and bioenergy generation, developing new approaches and solutions, and improving process stability would help encourage and enhance the adoption of the CE framework in the phytoremediation of domestic wastewater.
  • 522
  • 30 Jun 2022
Topic Review
Physical and Mental Health Impacts of Nitrogen Oxide
Nitrogen oxides (NOx) are gaseous pollutants contributing to pollution in their primary form and are also involved in reactions forming ground-level ozone and fine particulate matter. Thus, NOx is of great interest for targeted pollution reduction because of this cascade effect. To achieve a holistic understanding of the correlation between NOx and human health, both the physical and mental health implications must be accounted for. The following content is intended to be illustrative in nature, and not exhaustive of all research conducted in the field. 
  • 721
  • 24 Jun 2022
Topic Review
Port-Related Shipping Gas Emissions
The global increase in shipping activity has contributed to the degradation of air quality, which particularly affects traffic-dense port areas. Due to the environmental and public health impacts of air quality in port cities, a number of inventories using varying methodologies have been conducted over the past two decades to manage gas emissions in specific areas. 
  • 528
  • 23 Jun 2022
Topic Review
Waste Management for Green Concrete Solutions
Reinforced concrete based on ordinary Portland cement (OPC) is one of the most commonly used materials in modern buildings. Due to the global growth of the building industry, concrete components have been partially or completely replaced with waste materials that can be used as binders or aggregates.
  • 1.2K
  • 20 Jun 2022
Topic Review
Removal of Dyestuffs from Effluents onto Biochar
Processing significant amounts of dye effluent discharges into receiving waters can supply major benefits to countries that are affected by the water crisis and anticipated future stress in many areas in the world. When compared to most conventional adsorbents, biochars can provide an economically attractive solution. In comparison to many other textile effluent treatment processes, adsorption technology provides an economical, easily managed, and highly effective treatment option.
  • 642
  • 20 Jun 2022
Topic Review
Hydrogel Adsorbents
The performance of hydrogel adsorbents depends on the constituents of the gels and the functions produced by the polymer networks of the gels. Research on hydrogels utilizing the characteristic functions of polymer networks has increased over the last decade. The functions of polymer networks are key to the development of advanced adsorbents for the removal of various pollutants.
  • 1.0K
  • 15 Jun 2022
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