Potential implementation of trees to remediate contaminated soil in Egypt

Bedair, Heba; Ghosh, Soumya; Abdelsalam, Ibrahim M.; Keerio, Ayaz Ali; AlKafaas, Samar Sami

doi:10.1007/s11356-022-22984-z

Cited by 16 publications

(7 citation statements)

References 112 publications

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“…Goods and services provided by the recorded species were assessed based on: (i) field observations, (ii) information collected from local people and herbalists and (iii) a review of existing literature on Egyptian flora. Among the literature reviewed were these by the following authors: Boulos (1983), Rizk and Al‐Nowaihy (1989), El‐Hadidi et al (1992), Belal and Springuel (1996), Chevallier (1996), Ayyad (1998), Batanouny (1999, 1999), Shaltout and Al‐Sodany (2002), Seif El‐Nasr and Bidak (2016), EEAA (2006), Ahmed (2009), Shaltout et al (2010, 2016), Hatim (2013), Zahran et al (2015), El‐Khalafy (2018), Mushtaq et al (2020), Bedair, Rady, et al (2022), Bedair, Ghosh, et al (2022) and Ghosh et al (2022). The major threats facing each tree taxon were assessed during field observations and by using mentioned literature in the previous section and http://www.iucnredlist.org/technical-documents/classification-schemes/threats-classification-scheme/.…”

Section: Methodsmentioning

confidence: 99%

Diversity, distribution and regional conservation status of the Egyptian tree flora

Shaltout

Bedair

2022

Afr J Ecol

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The present study aims at determining the phytogeographical distribution and economic potential and documenting the degree of risk to the extinction of tree species, and the changes these species have undergone over the past 20 years. Field surveys were conducted at many locations in Egypt between January 2017 and March 2020. From each location, GPS coordinates were taken and the number of individuals was estimated. Also, specimens and seed samples for each species were collected from different habitats as can as possible. Other data were collected through herbaria visits and existing literature. The recorded taxa were arranged alphabetically according to Angiosperm Phylogeny Group system (APG IV). Evaluation of conservation status was based on IUCN Red List Categories and Criteria. In the present study, we applied Criterion B that concerns the geographical range in the form of both B1 (extent of occurrence: EOO) and B2 (area of occupancy: AOO). Calculations of both AOO and EOO and the assessment process were assisted using the GeoCAT software. Fifty‐seven taxa were recorded, and most of them occur in Elbanian sector. Among them, five alien species were recorded. Many taxa offered economic goods such as medicinal, timber and fuel values; and environmental services as shaders and phytoremediators. Fifty taxa suffered from over‐collecting and over‐cutting. Among the 52 native trees in the present study, 31 taxa are evaluated as threatened with extinction; 10 taxa are Critically Endangered, 16 are Endangered and 5 are Vulnerable. There are two taxa assessed as Near Threatened and 15 as Least Concern. On the contrary, four taxa fall in the category of Data Deficient. There are 28 in situ conserved taxa in the protected areas. Also, 28 taxa are under ex situ conservation. In conclusion, land‐use patterns, climate change and human impact lead to put about 61% of the trees in Egypt under threat of extinction. Consequently, nature conservation organisations should take an action towards the conservation of these valuable taxa.

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Section: Methodsmentioning

confidence: 99%

Diversity, distribution and regional conservation status of the Egyptian tree flora

Shaltout

Bedair

2022

Afr J Ecol

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“…A viable option for the decontamination of areas polluted with petroleum-derived hydrocarbons is offered by phytoremediation, especially as the biomass of plants applicable for in situ remediation can later be used to produce bioenergy [ 90 , 97 ]. Hence, the success of the effective remediation of soils polluted with these compounds depends on the appropriate choice of plants, considering their lasting and stable effects in the natural environment [ 99 , 100 , 101 , 102 ]. The choice of the plants should also be driven by the concentration and type of petroleum-derived hydrocarbons polluting the soil [ 98 , 103 ] and—consequently—by an appropriate phytoremediation strategy [ 99 , 104 ].…”

Section: Discussionmentioning

confidence: 99%

The Usability of Sorbents in Restoring Enzymatic Activity in Soils Polluted with Petroleum-Derived Products

et al. 2023

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Due to their ability to adsorb or absorb chemical pollutants, including organic compounds, sorbents are increasingly used in the reclamation of soils subjected to their pressure, which results from their high potential in eliminating xenobiotics. The precise optimization of the reclamation process is required, focused primarily on restoring the condition of the soil. This research are essential for seeking materials sufficiently potent to accelerate the remediation process and for expanding knowledge related to biochemical transformations that lead to the neutralization of these pollutants. The goal of this study was to determine and compare the sensitivity of soil enzymes to petroleum-derived products in soil sown with Zea mays, remediated using four sorbents. The study was conducted in a pot experiment, with loamy sand (LS) and sandy loam (SL) polluted with VERVA diesel oil (DO) and VERVA 98 petrol (P). Soil samples were collected from arable lands, and the effects of the tested pollutants were compared with those used as control uncontaminated soil samples in terms of Zea mays biomass and the activity of seven enzymes in the soil. The following sorbents were applied to mitigate DO and P effects on the test plants and enzymatic activity: molecular sieve (M), expanded clay (E), sepiolite (S), and Ikasorb (I). Both DO and P exerted a toxic effect on Zea mays, with DO more strongly disturbing its growth and development and the activities of soil enzymes than P. In sandy clay (SL), P was found to be a significant inhibitor of dehydrogenases (Deh), catalase (Cat), urease (Ure), alkaline phosphatase (Pal), and arylsulfatase (Aryl) activities, while DO stimulated the activity of all enzymes in this soil. The study results suggest that the sorbents tested, mainlya molecular sieve, may be useful in remediating DO-polluted soils, especially when alleviating the effects of these pollutants in soils of lower agronomic value.

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“…Phytoextraction’s desired characteristics in plants are high growth rate, high aboveground biomass, a deep and highly branched root system, and efficient uptake and translocation of heavy metals to the shoots [ 22 , 36 , 54 , 55 ]. Based on these indicators, the results obtained in the present study indicate that C. pyriformis possibly does not have the best characteristics to be considered a phytoextraction plant.…”

Section: Discussionmentioning

confidence: 99%

“…and Populus sp. in phytoextraction [ 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 ], showing that these species could be used as an efficient and cost-effective method to remove Cd contamination from agricultural soils [ 22 , 36 ]. On the one hand, the benefits associated with accompanying trees in cacao agroforestry systems have been widely studied in terms of carbon capture, water use efficiency and other nutritional benefits [ 18 , 19 , 38 ].…”

Section: Introductionmentioning

confidence: 99%

Cadmium up Taking and Allocation in Wood Species Associated to Cacao Agroforestry Systems and Its Potential Role for Phytoextraction

Galvis,

Jaimes-Suárez,

Rojas Molina

et al. 2023

Plants

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Trees in cacao Agroforestry systems (AFS) may present a high potential for cadmium (Cd) phytoextraction, helping to reduce Cd in cacao (Theobroma cacao L.) plants grown in contaminated soils. To assess this potential, four forest fine-woody species commonly found in cacao high-productive sites in Colombia (Tabebuia rosea, Terminalia superba, Albizia guachapele, and Cariniana pyriformis) were exposed to contrasting CdCl2 contamination levels (0, 6, and 12 ppm) on a hydroponic medium. Growth dynamics, tolerance index (TI), and Cd concentration and allocation in leaves, stems, and roots were evaluated for up to 90 days after initial exposure. T. superba, A. guachapele, and C. pyriformis were classified as moderately tolerant (TI > 0.6), and T. rosea was considered a sensitive species (TI < 0.35) under 12 ppm Cd contamination. Despite showing a high stem Cd concentration, C. pyriformis also showed the lowest relative growth rate. Among the evaluated forest species, A. guachapele exhibited the highest Cd accumulation capacity per plant (2.02 mg plant−1) but also exhibited a higher Cd allocation to leaves (4%) and a strong decrease in leaf and stem dry mass after 90 days of exposure (~75% and 50% respectively, compared to control treatments). Taking together all the favorable features exhibited by T. superba as compared to other CAFS tree species and recognized phytoextractor tree species in the literature, such as Cd hyperaccumulation, high tolerance index, low Cd concentration in leaves, and high Cd allocation to the stem (harvestable as wood), this species is considered to have a high potential for cadmium phytoextraction in cocoa agroforestry systems.

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Potential implementation of trees to remediate contaminated soil in Egypt

Cited by 16 publications

References 112 publications

Diversity, distribution and regional conservation status of the Egyptian tree flora

Diversity, distribution and regional conservation status of the Egyptian tree flora

The Usability of Sorbents in Restoring Enzymatic Activity in Soils Polluted with Petroleum-Derived Products

Cadmium up Taking and Allocation in Wood Species Associated to Cacao Agroforestry Systems and Its Potential Role for Phytoextraction

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