A5059099365- Heavy metals in environment
- Clay minerals and soil interactions
- Adsorption and biosorption for pollutant removal
- Environmental remediation with nanomaterials
- Geochemistry and Geologic Mapping
- Coal and Its By-products
- Radioactivity and Radon Measurements
- Arsenic contamination and mitigation
- Soil and Unsaturated Flow
- Heavy Metals in Plants
- Microplastics and Plastic Pollution
- Recycling and Waste Management Techniques
- Municipal Solid Waste Management
- Pharmaceutical and Antibiotic Environmental Impacts
- Polymer-Based Agricultural Enhancements
- Soil and Land Suitability Analysis
- Soil Carbon and Nitrogen Dynamics
- Groundwater flow and contamination studies
- Soil Geostatistics and Mapping
- Groundwater and Isotope Geochemistry
- Iron oxide chemistry and applications
- Water Quality and Pollution Assessment
- Mine drainage and remediation techniques
- Geochemistry and Elemental Analysis
- Phosphorus and nutrient management
King Saud University
2016-2025
University of Khartoum
2023
Abstract Sources and levels of heavy metals (HMs) in soil dust urban suburban areas Riyadh (industrial city) Mahad AD’Dahab (mining area) cities Saudi Arabia were reported this study. Additionally, the concentrations HMs different particle size fractions (> 250, 63–250 < 63 µm) reported. Pollution extent, ecological human health risks associated with collected samples explored. Contamination higher as compared to at all sites. The average integrated potential risk area was 139, thus...
Chemical fertilizers (CFs) are indispensable nutrients source for plants replenishing them with essential nutrients. However, their over-utilization imposed destructive consequences of excessive loss major resulting in low nutrient use efficiency and further environmental concerns. Therefore, to counter application CFs regulate sustainable agriculture, a novel biochar (BC)-based slow-release fertilizer (SRF) was developed by incorporating mica (MI) semi-interpenetrating chitosan polymer...
Surface modification of nanoscale zero-valent iron (nZVI) using polymer stabilizers (e.g., sodium carboxymethyl cellulose, CMC) is usually used to minimize aggregation, increase stability, and enhance transport nZVI. We investigated the stability dynamic aggregation bare CMC–nZVI as affected by variations in pH, ionic strength (IS), nZVI particle concentration. CMC coating resulted smaller hydrodynamic size larger zeta potential. The largest was associated with at high IS (100 mM), pH close...
Abstract Novel carbon nanodots (nCD-DBC) and nano zero-valent iron composites (nZVI-DBC) were synthesized using date palm waste-derived biochar (DBC). The materials analyzed for chemical structural composition by FTIR, SEM, XRD, TGA, evaluated their methylthioninium chloride dye (MB) removal efficiency from contaminated aqueous solutions. pH 7.0 was found optimum the highest MB in sorption batch studies. Kinetics of onto sorbents best described pseudo-second-order ( R 2 = 0.93–0.99) Elovich...
An increasing trend of anthropogenic activities such as urbanization and industrialization has resulted in induction accumulation various kinds heavy metals the environment, which ultimately disturbed biogeochemical balance. Therefore, present study was conducted to probe efficiency conocarpus (Conocarpus erectus L.) waste-derived biochar its modified derivatives for removal lead (Pb), cadmium (Cd), copper (Cu), zinc (Zn) from aqueous solutions. Biochar produced at 600 °C with humic acid...
Abstract In this study, biochar (BC) and hydrochar (HC) composites were synthesized with natural kaolinite clay their properties, stability, carbon (C) sequestration potential, polycyclic aromatic hydrocarbons (PAHs) toxicity, impacts on maize germination growth explored. Conocarpus waste was pretreated 0%, 10%, 20% pyrolyzed to produce BCs (BC, BCK10, BCK20, respectively), while hydrothermalized HCs (HC, HCK10, HCK20, respectively). The materials characterized using X-ray diffraction,...
The liquid and bio-solids (landfill sediments) product from landfills has many toxic substances, which may adversely affect on the environmental health. Thus in order to have a better management of characteristics Riyadh landfill leachates, 80 representative leachate samples were collected analyzed February May 2008. analysis leachates includes pH, ECw, concentrations soluble ions, chemical oxygen demand (COD), total suspended solids (TSS), heavy metals contents. obtained results showed that...
Polymer-clay composites were prepared by natural zeolite (clinoptilolite) or naturally local clay deposits in an N,N-methylene-bis-acrylamide as cross-linked. The resultant used for the removal of Cr(VI) from aqueous solution. Additionally, their effects on soluble ions tannery wastewater investigated. produced characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). results showed that is dependent upon initial...
Batch and transport experiments were used to investigate the remediation of a loamy sand soil contaminated with Cr(VI) using zero valent iron nanoparticles (nZVI) stabilized by carboxy methyl cellulose (CMC-nZVI). The effect pH, ionic strength (IS), flow rate on removal efficiency investigated under equilibrium (uniform transport) non-equilibrium (Two-site sorption) Hydrus-1D model. overall ranged from 70 over 90% based chemical characteristics CMC-nZVI suspension conditions. concentration...
Microplastics (MPs) and heavy metals have recently attracted much attention due to their widespread distribution in the environment. Co-occurrence of MPs dust poses potential health risks for humans. The objectives this study were investigate pollution risk factors associated with co-occurring urban dust. Here, 20 samples (both indoor outdoor environments) collected from different places Riyadh, Saudi Arabia using sweeping method. separated via density separation ZnCl 2 Microscopic...