Kinetics, Isotherms, and Thermodynamic Modeling of the Adsorption of Phosphates from Model Wastewater Using Recycled Brick Waste

Processes, Год журнала: 2020, Номер 8(6), С. 665 - 665

Опубликована: Июнь 3, 2020

Phosphates in wastewater at elevated concentrations cause eutrophication of water bodies and their removal from treated is essential before effluents are discharged to the environment. predominately removed during treatment by chemical precipitation which usually expensive has a significant environmental footprint. The purpose this study was investigate effectiveness waste recycled bricks as adsorbent for phosphate treatment. kinetics, isotherms, thermodynamics adsorption were investigated establish mechanisms adsorption. results showed that capacities increased with an increase contact time, dosage, initial concentration. kinetic indicated governed several various processes dominating different stages process better represented pseudo-second-order kinetics Langmuir isotherm adequately described phosphates onto brick particles maximum capacity 5.35 mg/g. thermodynamic studies exothermic proceeded spontaneously, demonstrating can be used sustainable alternative effective wastewater.

Язык: Английский

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Managing nitrogen legacies to accelerate water quality improvement

Nature Geoscience, Год журнала: 2022, Номер 15(2), С. 97 - 105

Опубликована: Фев. 1, 2022

Язык: Английский

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Modelling eutrophication in lake ecosystems: A review

The Science of The Total Environment, Год журнала: 2018, Номер 651, С. 2985 - 3001

Опубликована: Сен. 26, 2018

Язык: Английский

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Scientists’ Warning to Humanity: Rapid degradation of the world’s large lakes

Journal of Great Lakes Research, Год журнала: 2020, Номер 46(4), С. 686 - 702

Опубликована: Май 25, 2020

Large lakes of the world are habitats for diverse species, including endemic taxa, and valuable resources that provide humanity with many ecosystem services. They also sentinels global local change, recent studies in limnology paleolimnology have demonstrated disturbing evidence their collective degradation terms depletion (water food), rapid warming loss ice, destruction ecosystems, accelerating pollution. particularly exposed to anthropogenic climatic stressors. The Second Warning Humanity provides a framework assess dangers now threatening world's large lake ecosystems evaluate pathways sustainable development more respectful ongoing provision Here we review current emerging threats world, iconic examples management failures successes, from which identify priorities approaches future conservation efforts. underscores extent resource degradation, is result cumulative perturbation through time by long-term human impacts combined other Decades resulted major challenges restoration legacy ecological economic costs generations. will require intense efforts warmer, increasingly populated achieve sustainable, high-quality waters. This an opportunity highlight value observatory network monitor report on environmental changes ecosystems.

Язык: Английский

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Eutrophication: Causes, consequences, physical, chemical and biological techniques for mitigation strategies

Environmental Challenges, Год журнала: 2023, Номер 12, С. 100733 - 100733

Опубликована: Май 17, 2023

Eutrophication is reckoned as an ecological challenge that exhibits adverse effects on the aquatic ecosystem well sustenance of portable water required by humans for their unremitting survival earth. There has been a range techniques prevention eutrophication, consequent need provision and protection bodies ecosystem. The employment chemical coagulants such lime, magnesium sulphate ferric reported to yield more than 95% removal nitrate phosphate. Moreover, adsorption studies revealed at optimum pH contact time 60 min, glutaraldehyde cross-linked chitosan exhibited highest capacity 139.4 mg/g, compared epichlorohydrin unmodified 108.24 44.38 mg/g respectively phosphate removal. use nano-filtration membrane coupled with bioreactor (NF-MBR) 62 days flux rate 16 l/m.h hydraulic retention 2.9 h posited display percentage 95, 90, 89, 87 68% COD, N-NH3, N-NO2, N-NO3- P-PO43− from wastewater. Lastly, biological wetland have be effective in combating eutrophication exhibiting efficiencies 86–98% (N-NH4), 99% (N-NO2), 82–99% (N-NO3−), 95–98% (total inorganic nitrogen), 71.2–31.9% (phosphate), 25–55% (COD) 47–86% (suspended solids). Nevertheless, success treatment slightly impeded loading rate.

Язык: Английский

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The role of freshwater eutrophication in greenhouse gas emissions: A review

The Science of The Total Environment, Год журнала: 2021, Номер 768, С. 144582 - 144582

Опубликована: Янв. 11, 2021

Язык: Английский

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The role of soil in regulation of climate

Philosophical Transactions of the Royal Society B Biological Sciences, Год журнала: 2021, Номер 376(1834), С. 20210084 - 20210084

Опубликована: Авг. 4, 2021

The soil carbon (C) stock, comprising organic C (SOC) and inorganic (SIC) being the largest reservoir of terrestrial biosphere, is a critical part global cycle. Soil has been source greenhouse gases (GHGs) since dawn settled agriculture about 10 millenia ago. Soils agricultural ecosystems are depleted their SOC stocks magnitude depletion greater in those prone to accelerated erosion by water wind other degradation processes. Adoption judicious land use science-based management practices can lead re-carbonization soils make them sink for atmospheric C. humid climates have potential increase storage arid semiarid store both SIC. Payments managers sequestration soil, based on credible measurement changes at farm or landscape levels, also important promoting adoption recommended practices. In conjunction with rapid aggressive reduction GHG emissions across all sectors economy, (and vegetation) be an negative method limiting warming 1.5 2°C This article theme issue 'The role delivering Nature's Contributions People'.

Язык: Английский

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Globally consistent assessment of coastal eutrophication

Nature Communications, Год журнала: 2021, Номер 12(1)

Опубликована: Окт. 22, 2021

Abstract Eutrophication is an emerging global issue associated with increasing anthropogenic nutrient loading. The impacts and extent of eutrophication are often limited to regions dedicated monitoring programmes. Here we introduce the first Google Earth Engine-based interactive assessment tool coastal potential (CEP). evaluates trends in satellite-derived chlorophyll- a (CHL) devise map CEP. Our analyses suggest that, globally, waters (depth ≤200 m) covering ∼1.15 million km 2 eutrophic potential. Also, CHL trends—eutrophication potential—are twofold higher than those showing signs recovery. effectively identified areas known severe symptoms, like dead zones, as well no information eutrophication. introduces prospect for consistent major implications Sustainable Development Goals (SDGs) application Observations support SDGs.

Язык: Английский

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Indices and models of surface water quality assessment: Review and perspectives

Environmental Pollution, Год журнала: 2022, Номер 308, С. 119611 - 119611

Опубликована: Июнь 15, 2022

Язык: Английский

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Persistent eutrophication and hypoxia in the coastal ocean

Cambridge Prisms Coastal Futures, Год журнала: 2023, Номер 1

Опубликована: Янв. 1, 2023

Abstract Coastal eutrophication and hypoxia remain a persistent environmental crisis despite the great efforts to reduce nutrient loading mitigate associated damages. Symptoms of this have appeared spread rapidly, reaching developing countries in Asia with emergences Southern America Africa. The pace changes underlying drivers not so clear. To address gap, we review up-to-date status mechanisms global coastal oceans, upon which examine trajectories over 40 years or longer six model systems varying socio-economic development statuses different levels histories eutrophication. Although these share common features eutrophication, site-specific characteristics are also substantial, depending on regional setting level social-economic along policy implementation management. Nevertheless, ecosystem recovery generally needs greater reduction pressures compared that initiated degradation becomes less feasible achieve past norms time anthropogenic ecosystems. While qualitative causality between consequences is well established, quantitative attribution remains difficult especially when consider social economic because ecosystems subject multiple influences cause–effect relationship often non-linear. Such relationships further complicated by climate been accelerating few decades. knowledge gaps limit our mechanistic understanding human-coastal ocean nexus identified, essential for science-based making. Recognizing lessons from management practices, advocate better, more efficient indexing system an advanced earth modeling framework optimal modules human dimensions facilitate evaluation effective restoration actions.

Язык: Английский

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