Role of phosphogypsum and NPK amendments on the retention or leaching of metals in different soils

Autor: Véronique Kazpard, Nabil Amacha, Zeinab Saad, Lei Chou, Antoine G. El Samrani, Mahmoud Wazne, Hussein Jaafar Kanbar, Rawaa Ammar
Přispěvatelé: Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Terre et Environnement de Lorraine (OTELo), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), EDST-PRASE, Faculty of Sciences, Lebanese University [Beirut] (LU), Lebanese American University (LAU), Litani River Authority, Faculty of Sciences [Lebanese University]
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Environmental Engineering
Industrial Waste
010501 environmental sciences
Management
Monitoring
Policy and Law
01 natural sciences
Calcium Sulfate
12. Responsible consumption
Soil
Waste Management
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry
Metals
Heavy
Cation-exchange capacity
Humans
Soil Pollutants
Leaching (agriculture)
Lebanon
Fertilizers
Waste Management and Disposal
ComputingMilieux_MISCELLANEOUS
0105 earth and related environmental sciences
2. Zero hunger
Soil organic matter
Environmental engineering
Soil chemistry
Phosphorus
04 agricultural and veterinary sciences
General Medicine
15. Life on land
Soil type
6. Clean water
Leaching model
Soil structure
13. Climate action
040103 agronomy & agriculture
0401 agriculture
forestry
and fisheries
Environmental science
Adsorption
Soil fertility
[SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy
Zdroj: Journal of Environmental Management
Journal of Environmental Management, Elsevier, 2016, 178, pp.20-29. ⟨10.1016/j.jenvman.2016.04.042⟩
ISSN: 0301-4797
1095-8630
Popis: Column leaching tests were conducted to investigate the effects of soil physicochemical characteristics on metal mobility in the subsurface. The metals investigated originated from disposed industrial waste byproducts and from agrochemicals spread over the farmlands. Soil column tests can provide insights into leaching of metals to underlying water compartments. The findings of this study can be used for prevention strategies and for setting risk assessment approaches to land-use and management, and soil and water quality and sustainability. Soils collected from an industrial (IS) watershed and an agricultural (AQ) hydrographic basin were used in soil column leaching experiments. The soil samples were characterized for mineralogy, functional groups, grain size, surface charge, soil type, porosity, and cation exchange capacity (CEC) along with elemental composition. Varying concentrations of phosphogypsum industrial waste or agrochemical (NPK fertilizer) was then added to the surface of the packed columns (n = 28). The columns were subjected to artificial rain over a period of 65 days. Leachates were collected and analyzed for dissolved Na(+), K(+), and Cd(2+) throughout the experimental period, whereas residual Cd content in the subsurface soil was measured at the end of the experiment. Physicochemical characterization indicated that the AQ soil has a higher potential for metal retention due to its fine clay texture, calcareous pH, high organic matter content and CEC. Metal release was more prominent in the IS soil indicating potential contamination of the surrounding soil and water compartments. The higher metal release is attributed to soil physicochemical characteristics. High calcium concentrations of phosphogypsum origin is expected to compete for adsorbed bivalent elements, such as Cd, resulting in their release. The physicochemical characteristics of the receiving media should be taken into consideration when planning land-use in order to achieve sustainable development. Soil physiochemical characteristics play a key role in determining the behavior and fate of elements upon application of amendments. Sandy soils should not be assigned to industrial zones or landfills due to their high permeability, unlike fine clay soils. Furthermore, application of fertilizers on sandy soils can threaten groundwater quality, whereas their extensive use on clayey soil can cause soil salinisation.
Databáze: OpenAIRE
Externí odkaz: