Browsing by Author "Hamdi, Helmi"
Now showing items 1-20 of 26
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Agricultural applications
( Elsevier , 2023 , Book chapter)The agro-industrial activities related to the three most cultivated palm tree species worldwide namely, oil palm, date palm, and coconut palm generate a large amount of residues during pre- and post-harvest processes. ... -
Application of Cyanobacteria ( sp.) Liquid Extract for the Alleviation of Salt Stress in Bell Pepper ( L.) Plants Grown in a Soilless System.
( MDPI , 2021 , Article)Salinity is one of the abiotic stresses that affect crop growth and productivity in arid and semi-arid regions. Unfortunately, there are few known methods to mitigate the deleterious impacts of salt stress on the development ... -
Biochar production from the pyrolysis of tomato processing residues
( Elsevier , 2022 , Book chapter)The global modern challenges of climate change, natural resources scarcity, waste overproduction, management and processing, etc., need to be examined under the circular economy principles. As such, biochar is considered ... -
Carbon mineralization, biological indicators, and phytotoxicity to assess the impact of urban sewage sludge on two light-textured soils in a microcosm
( Wiley , 2020 , Article)The agricultural reuse of urban sewage sludge (USS) modifies soil properties depending on sludge quality, management, and pedo-environmental conditions. The aim of this microcosm study was to assess C mineralization and ... -
Co-occurrence of antibiotic and metal resistance in long-term sewage sludge-amended soils: influence of application rates and pedo-climatic conditions
( Springer , 2023 , Article)Urban sewage sludge (USS) is increasingly being used as an alternative organic amendment in agriculture. Because USS originates mostly from human excreta, partially metabolized pharmaceuticals have also been considered in ... -
Community-level genetic profiles of actinomycetales in long-term biowaste-amended soils
( Springer , 2020 , Article)Actinomycetales is an order of actinobacteria that have an important role in the decomposition of organic matter. Their abundance and distribution can reflect a good level of soil fertility as well as biological activity. ... -
Degraded Arid Soil Reclamation for Cotton Cultivation Using Organic Waste Amendments
(2024 , Conference Paper)Qatar is one of the most fertilizer-dependent countries due to challenging soil and climatic conditions. The country strives toward self-sufficiency in agricultural production in alignment with the Qatar National Vision ... -
Enhancement in bell pepper (Capsicum annuum l.) plants with application of roholtiella sp. (nostocales) under soilless cultivation
( MDPI , 2021 , Article)Cyanobacteria are found to be renewable and sustainable additives for growth improvement in crops. Extracts and biomass of three nitrogen-fixing cyanobacteria namely, Roholtiella sp. (QUCCCM97), Nostoc ellipsosporum ... -
Environmental applications of tomato processing by-products
( Elsevier , 2022 , Book chapter)Sustainable management of large amounts of tomato wastes generated during industrial processing is nowadays considered as an urgent challenge. In this chapter, recent investigations on the environmental application of ... -
Evaluation of Roholtiella sp. Extract on Bell Pepper (Capsicum annuum L.) Yield and Quality in a Hydroponic Greenhouse System
( Frontiers Media , 2022 , Article)This study was carried out to investigate the impacts of cyanobacteria (Roholtiella sp.) high-value product extract (HVPE) and water resuspended biomass WRB treatments on bell pepper production using the hydroponic system ... -
Harnessing rhizospheric core microbiomes from arid regions for enhancing date palm resilience to climate change effects
( Frontiers Media , 2024 , Article Review)Date palm cultivation has thrived in the Gulf Cooperation Council region since ancient times, where it represents a vital sector in agricultural and socio-economic development. However, climate change conditions prevailing ... -
Heat-stress-induced changes in enzymatic antioxidant activities and biochemical processes in bell pepper (Capsicum annuum L.) seedlings
( Turkiye Klinikleri , 2023 , Article)Heat stress (HS) is expected to become a significant abiotic stressor with the continued rise in global temperatures, severely limiting the development and production of bell pepper (Capsicum annuum L.), especially in arid ... -
Impact of urban sewage sludge on soil physico-chemical properties and phytotoxicity as influenced by soil texture and reuse conditions
( Wiley , 2020 , Report)Urban sewage sludge (USS) is increasingly applied to agricultural soils, but mixed results have been reported because of variations in reuse conditions. Most field trials have been conducted in cropping systems, which ... -
Mitigating soil water deficit using organic waste compost and commercial water retainer: a comparative study under semiarid conditions
( Springer Nature , 2023 , Article)Semiarid regions have particularly been confronted with climate change effects reflected by the consistent decrease of rainfall and increase of evapotranspiration. This drought stress constitutes the main constraint for ... -
Monitoring the variation of soil quality with sewage sludge application rates in absence of rhizosphere effect
( Elsevier , 2020 , Article)Agricultural soils in semi-arid regions have frequently been degraded due to adverse climatic conditions, organic matter depletion, and poor farming practices. To enhance soil quality, this study examines the reuse of ... -
Nutrient retention and release from raw exhausted grape marc biochars and an amended agricultural soil: Static and dynamic investigation
( Elsevier , 2020 , Article)Biochar is the solid by-product of biomass thermochemical conversion via pyrolysis technique. Biochar addition to croplands as an organic amendment can improve soil properties and increase agricultural productivity. However, ... -
Pyrolysis Process as a Sustainable Management Option of Poultry Manure: Characterization of the Derived Biochars and Assessment of their Nutrient Release Capacities
( MDPI , 2019 , Article)Raw poultry manure (RPM) and its derived biochars at temperatures of 400 (B400) and 600 ◦C (B600) were physico-chemically characterized, and their ability to release nutrients was assessed under static conditions. The ... -
Recycling of gas-to-liquid sludge as a potential organic amendment: Effect on soil and cotton properties under hyperarid conditions
( Elsevier , 2023 , Article)Gas-to-liquid (GTL) sludge is a specific wastewater treatment by-product, which is generated during the industrial process of natural gas conversion to transportation fuels. This least studied sludge is pathogen-free and ... -
Seed Biofortification by Engineered Nanomaterials: A Pathway to Alleviate Malnutrition?
( American Chemical Society , 2020 , Article Review)Micronutrient deficiencies in global food chains are a significant cause of ill health around the world, particularly in developing countries. Agriculture is the primary source of nutrients required for sound health, and ... -
Sludge-derived biochars: A review on the influence of synthesis conditions on pollutants removal efficiency from wastewaters
( Elsevier , 2021 , Article)Pyrolysis is a thermochemical process that permits the conversion of biomasses into energy (bio-oil and biogas) and a solid residue called biochar. The generation of biochar from lignocellulosic materials has been, for ...
