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Radhouan El Zrelli

Radhouan El Zrelli
SADEF Agronomy & Environment

PhD, Environmental Eco-Bio-Geosciences, Anthropization and Risk Assessment

About

35
Publications
18,780
Reads
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713
Citations
Citations since 2016
28 Research Items
668 Citations
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150
Education
September 2013 - May 2017
Paul Sabatier University - Toulouse III
Field of study
  • Littoral Environment Pollution
September 2010 - June 2011
Paul Sabatier University - Toulouse III
Field of study
  • Public Health Toxicology
September 2008 - July 2009
Paul Sabatier University - Toulouse III
Field of study
  • The transfer of contaminants in the “soil–plant–atmosphere” system and tracking of isotopic signatures.

Publications

Publications (35)
Article
Mismanaged plastic waste interacts with secondary environmental pollutants, potentially aggravating their impact on ecosystems and human health. Here we characterized the natural and artificial radionuclides in polyethylene terephthalate bottles collected from the industrial littoral discharge of a phosphate fertilizer plant. The activity concentra...
Article
This work is a first contribution to the knowledge of natural radionuclides (226Ra, 238U, 40K, and 232Th) activities in phosphate rock (NORM), phosphogypsum, and phosphogypsum foam (TENORM) from the coastal fertilizer plants of Gabes (Southeastern Tunisia) and the assessment of their radiation hazards on human health and the surrounding environment...
Article
This is the first study on the behavior and industrial fluxes of rare earth elements (REE) in the coastal fertilizer plants of Gabes (south-eastern Tunisia), the economic losses related to their wastes, and their environmental and human health hazards. The concentrations of 16 REE were assessed in phosphate rock (PR), phosphogypsum (PG) and phospho...
Article
In the early XXth century, the Gulf of Gabes in SE Tunisia used to host the most extended Posidonia oceanica seagrass beds in the Mediterranean basin and was a highly productive hotspot of benthic species. Since the 70's, >500 million t of wet toxic phosphogypsum discharges from a fertilizer industrial complex have led to the gradual loss of ∼90 %...
Article
Full-text available
In this paper, we investigated seasonal variations in concentrations of microplastics (MPs) in surface sediments of a lagoon heavily impacted by human activities, located in northern Tunisia (the Bizerte lagoon, southern Mediterranean Sea). Analyses of 112 sediment samples collected from 28 stations between May 2019 and February 2020 revealed signi...
Article
Full-text available
This Collective Article presents new information about the occurrence of 21 taxa that belong to six Phyla: one Cnidaria, one Ctenophora, two Annelida, four Mollusca, two Arthropoda, and eleven Chordata. These records were reported from ten countries from the western to the eastern Mediterranean Sea as follows: Spain: early colonization signs of the...
Article
Although several studies previously assessed the contents of trace metals in the sediments of the heavily humanimpacted lagoon of Bizerte (northern Tunisia), multi-analytical approaches have not been, so far, used to assess the ecological risks in this water body. This study attempts to provide a comprehensive ecological risk assessment related to...
Article
Full-text available
The present paper reports the rapid spread and increased abundance of the northern brown shrimp Penaeus aztecus Ives, 1891, four years after its first record by Ben Jarray et al. (2019), in the offshore waters of the Gulf of Gabes (south-eastern Tunisia). In order to trace the spread of this shrimp and assess the potential effects of its establishm...
Article
Full-text available
The occurrence of three exotic decapods is reported from the Lagoon of Bizerte (northern Tunisia) based on records gathered from local fishermen. These three species are the Atlantic blue crab Callinectes sapidus Rathbun, 1896, the blue swimming crab Portunus segnis (Forskål, 1775), and the Lessepsian shrimp Trachysalambria palaestinensis (Steinitz...
Article
Full-text available
The macroalgae Lophocladia lallemandii (Montagne) F. Schmitz and Sarconema filiforme (Sonder) Kylin and the spaghetti bryozoan Amathia verticillata (delle Chiaje, 1822) are here first reported in native seagrass beds in the Gulf of Gabès (southeastern Tunisia, Mediterranean Sea). Among them, the sighting of S. filiforme constitutes the first record...
Article
Full-text available
This article includes 23 new records of alien and cryptogenic species in the Mediterranean Sea, belonging to 4 Phyla (Chordata, Echinodermata, Arthropoda and Mollusca), distributed from the Alboran to the Levantine Sea. Records are reported from eight countries listed from West to East as follows: Algeria: new records of the Atlantic blue crab Call...
Article
Compared to open sea environments, there is still limited knowledge about microplastic levels in semi-enclosed systems such as coastal lagoons. This work aims to assess the levels of MPs in the waters of an urban lagoon (Bizerte lagoon, northern Tunisia) and to study the effects of environmental factors on their distribution and abundance. Average...
Article
This study assesses the microplastics (MPs) levels in mussels (Mytilus galloprovincialis) and seawater from a southern Mediterranean lagoon (Bizerte lagoon, Northern Tunisia) and discusses the potential effects of its consumption on human health. Polyethylene was the most abundant in mussels and seawater, followed by polypropylene and cellophane. T...
Article
In early XXth cen­tury, the Gulf of Gabes (SE Tunisia) used to host the most ex­tended Posi­do­nia ocean­ica sea­grass beds in the Mediter­ranean Sea, and a highly pro­duc­tive hotspot of ben­thic/ de­m­er­sal bio­di­ver­sity. Sponge har­vest­ing and seabed trawl­ing pro­voked a first step of sea­grass degra­da­tion. Sub­se­quently, phos­ph­o­gyp­s...
Article
Along the past century, the Arabian Gulf has experienced a continuous and fast coastal development leading to increase the human pressures on the marine environment. The present study attempts to describe the historical changes of trace elements in the sediments of vegetated coastal habitats in the western Arabian Gulf. 210Pb–dated sediment cores c...
Article
The present work examines the different types of solid effluents dumped in the coastal environment from Gabes phosphate fertilizer plants, describes their coastal repartition and assesses their long-term environmental impacts. Scanning Electron Microscopy analysis of collected beach sediment samples showed that these wastes consist of phosphogypsum...
Article
The Gabes Gulf had received huge quantities of phosphogypsum discharged from fertilizer plants. Dumping phosphogypsum in coastal waters leads to the formation of foam layers which can float on the surface and be passively transported to distant areas. This is the first attempt at geochemical and mineralogical characterization of these industrial fo...
Article
Full-text available
Since the establishment of the coastal industrial complex in Gabes city (Gulf of Gabes, SE Tunisia), hundred million tons of untreated phosphogypsum have been discharged in the open sea causing serious environmental problems. To better understand the dynamic and behavior of phosphate/phosphogypsum contaminants from raw ores to marine environment, a...
Article
Full-text available
The “New Mediterranean Biodiversity Records” series includes new records of marine species found in the Mediterranean basin and/or information on the spatial distribution of already established species of particular interest. The current article presents information on 21 marine taxa classified per country according to their geographic position in...
Article
Full-text available
Within the framework of a study on the extent and history of marine pollution in the central area of Gabes Gulf, the concentrations of four trace metals (Cd, Cu, Pb, and Zn) were assessed in three different tissues of the seagrass species, Posidonia oceanica (leaves, rhizomes, and roots), in the mat of P. oceanica meadows at different depths from t...
Article
Full-text available
Muscovite/phillipsitic zeolite was introduced as a novel inorganic composite of stunning adsorption properties. The composite was investigated in the uptake reactions of Hg(II), As(V), and U(VI) as highly toxic water contaminants considering different adsorption factors. The adsorption properties of muscovite/phillipsitic zeolite are highly depende...
Article
Full-text available
The present work is a first contribution to the knowledge of the biology of the spider crab Maja crispata along the Tunisian coasts, with particular reference to the sex-ratio and size (carapace width) structure as well as the morphometric characterization of six subpopulations living in both south-eastern (Gulf of Gabes) and northern (Gulf of Tuni...
Conference Paper
La présente étude a permis de déterminer 'l'état de santé' des sédiments littoraux de surface situés à proximité du complexe chimique de Gabès. Les fortes concentrations des différents polluants métalliques étudiés ainsi que les indices environnementaux et écologiques calculés montrent que la zone interportuaire de Chatt Essalam, représente la zone...
Conference Paper
In this study, we collected two cephalopod species, Octopus vulgaris and Sepia officinalis, from different sites in the Gulf of Gabes, south-eastern Tunisia, and analyzed the concentrations of mercury (Hg), zinc (Zn), cadmium (Cd) and copper (Cu) in their edible tissues (mantle and arms). The comparison of the results found showed significant diffe...
Conference Paper
This work is a first contribution to the knowledge of the biology of the spider crab Maja crispata along the Tunisian coasts. The main results of this study showed that the Tunisian population of M. crispata is generally male-biased with some spatial variations of the sex-ratio. The comparative analysis of size structures of 6 studied subpopulation...
Conference Paper
L'évaluation du service écosystémique fourni au secteur de la pêche côtière par les herbiers de Posidonies de la partie centrale du Golfe de Gabès se base sur le fait que leur bon état de santé impacte directement la diversité et le volume des prises de la majorité des espèces benthiques. En tenant compte du prix des produits de ce type de pêche et...
Article
Full-text available
The Collective Article “New Mediterranean Biodiversity Records” of the Mediterranean Marine Science journal offers the means to publish biodiversity records in the Mediterranean Sea. The current article has adopted a country-based classification and the countries are listed according to their geographic position, from west to east. New biodiversity...
Article
In the present study, the concentrations of 6 tracemetals (Hg, Cd, Cu, Pb, Cr and Zn) were assessed in the surface sediments of the central coastal area of Gabes Gulf to determine their contamination status, source, spatial distribution and ecological risks. The ranking of metal contents was found to be Zn N Cd N Cr N Pb N Cu N Hg. Correlation anal...
Article
Full-text available
The variations in the composition and structure of macroinvertebrate benthic communities in relationship with the marine sediment enrichment with heavy metals were investigated in the Gulf of Gabes, Tunisia. Standard community parameters as well as the trophic and ecological structure were analysed in 18 stations sampled in six localities. Highest...
Article
Full-text available
Since the establishment of the ‘Tunisian Chemical Group’ in Gabes, Tunisia, no serious investigations have been carried out about heavy metal pollution in the Gulf of Gabes. In this study, the contents of four heavy metals were assessed in four mollusc species (two gastropods, Gibbula ardens and Patella caerulea, and two bivalves, Pinctada radiata...
Conference Paper
Full-text available
The contents of four heavy metals (Mercury, Lead, Cadmium, Chromium) were assessed in four mollusk species (Gibbula ardens, Patella caerulea, Pinctada radiata and Pinna nobilis), collected from twelve coastal stations in the gulf of Gabes. High concentrations of heavy metals were recorded in the central area of the gulf, nearer to Gabes city; howev...

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Projects

Projects (9)
Project
This project aims to characterize the rare earth elements associated to the phosphate industry , explores the mining potential, and assesses their impacts on natural environments and human health.
Project
Although their socio-economic importance, Mediterranean coastal lagoons are continuously exposed to several human pressures that affect their ecosystem functioning and services. The aim of this project is to conduct comprehensive studies characterizing the ecological and environmental status of these systems and contrinute to their conservation and sustainable management.