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Vertical translocation/leaching of sulfamethoxazole (SMZ) through manure-amended sandy loam soil and significance of biochar application on SMZ retention were investigated in this study. Soil was filled in columns and amended with manure spiked with 13.75 mg kg−1 (S1), 27.5 mg kg−1 (S2), and 55 mg kg−1 (S3) of SMZ. Jujube (Ziziphus jujube L.) wood waste was transformed into biochar and mixed with S3 at 0.5% (S3-B1), 1.0% (S3-B2), and 2.0% (S3-B3) ratio. Cumulative SMZ leaching was lowest at pH 3.0, which increased by 16% and 34% at pH 5.0 and 7.0, respectively. A quicker release and translocation of SMZ from manure occurred during the initial 40 h, which gradually reduced over time. Intraparticle diffusion and Elovich kinetic models were the best fitted to leaching data. S3 exhibited the highest release and vertical translocation of SMZ, followed by S2, and S1; however, SMZ leaching was reduced by more than twofold in S3-B3. At pH 3.0, 2.0% biochar resulted in 99% reduction in SMZ leaching within 72 h, while 1.0% and 0.5% biochar applications reduced SMZ leaching to 99% within 120 and 144 h, respectively, in S3. The higher SMZ retention onto biochar could be due to electrostatic interactions, H-bonding, and π-π electron donor acceptor interactions.
Mohammad Al-Wabel; Munir Ahmad; Muhammad Rafique; Mutair Akanji; Adel Usman; Abdullah Al-Farraj. Sulfamethoxazole Leaching from Manure-Amended Sandy Loam Soil as Affected by the Application of Jujube Wood Waste-Derived Biochar. Molecules 2021, 26, 4674 .
AMA StyleMohammad Al-Wabel, Munir Ahmad, Muhammad Rafique, Mutair Akanji, Adel Usman, Abdullah Al-Farraj. Sulfamethoxazole Leaching from Manure-Amended Sandy Loam Soil as Affected by the Application of Jujube Wood Waste-Derived Biochar. Molecules. 2021; 26 (15):4674.
Chicago/Turabian StyleMohammad Al-Wabel; Munir Ahmad; Muhammad Rafique; Mutair Akanji; Adel Usman; Abdullah Al-Farraj. 2021. "Sulfamethoxazole Leaching from Manure-Amended Sandy Loam Soil as Affected by the Application of Jujube Wood Waste-Derived Biochar." Molecules 26, no. 15: 4674.
The present work investigated the potential of using zeolite (clinoptilolite), montmorillonite (Swy2), and Conocarpus biochar as adsorbents to remove 226Ra from aqueous solution. The effect of the initial 226Ra concentrations on sorbents’ equilibrium activity concentrations and sorbents’ radium removal efficiency were investigated. The results showed that zeolite has a higher removal efficiency for 226Ra in comparison with the efficiencies of montmorillonite and biochar. In addition to the linear isotherm model, the Freundlich model, followed by Temkin’s model, provided a better description of the adsorption process than the Langmuir model. Kinetic studies indicated that a pseudo-second-order kinetic model could be the best fit for the adsorption of 226Ra onto the three investigated sorbents, which suggests that the mechanism of adsorption of 226Ra by sorbents was chemisorption. The intraparticle diffusion model indicated that adsorption of 226Ra onto the sorbents involves a multistep process: (i) boundary layer diffusion and (ii) intraparticle diffusion. Moreover, the remediation of groundwater samples polluted with 226Ra was assessed using the investigated sorbents; the results showed that zeolite also has the highest removal efficiency among other sorbents. Thus, the low cost, availability, and the high adsorption efficiency of zeolite can be a promising sorbent on 226Ra removal from aqueous solutions and groundwater remediation.
Fahad I. Almasoud; Abdullah S. Al-Farraj; Mohammad I. Al-Wabel; Adel R.A. Usman; Yousef J. Alanazi; Zaid Q. Ababneh. The Potential Use of Zeolite, Montmorillonite, and Biochar for the Removal of Radium-226 from Aqueous Solutions and Contaminated Groundwater. Processes 2020, 8, 1537 .
AMA StyleFahad I. Almasoud, Abdullah S. Al-Farraj, Mohammad I. Al-Wabel, Adel R.A. Usman, Yousef J. Alanazi, Zaid Q. Ababneh. The Potential Use of Zeolite, Montmorillonite, and Biochar for the Removal of Radium-226 from Aqueous Solutions and Contaminated Groundwater. Processes. 2020; 8 (12):1537.
Chicago/Turabian StyleFahad I. Almasoud; Abdullah S. Al-Farraj; Mohammad I. Al-Wabel; Adel R.A. Usman; Yousef J. Alanazi; Zaid Q. Ababneh. 2020. "The Potential Use of Zeolite, Montmorillonite, and Biochar for the Removal of Radium-226 from Aqueous Solutions and Contaminated Groundwater." Processes 8, no. 12: 1537.
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 of nZVI. We investigated the stability and dynamic aggregation of bare and CMC–nZVI as affected by variations in pH, ionic strength (IS), and nZVI particle concentration. CMC coating of nZVI resulted in smaller hydrodynamic size and larger zeta potential. The largest hydrodynamic size of nZVI was associated with bare nZVI at high IS (100 mM), pH close to the point of zero charge (PZC, 7.3–7.6), and larger particle concentration (1.0 g L−1). The increase in the zeta potential of CMC–nZVI reached one- to four-fold of that for bare nZVI, and was greater at pH values close to PZC, high IS, and larger particle concentration. The stability of CMC–nZVI was increased by 61.8, 93.1, and 57.5% as compared to that of bare nZVI at IS of 1, 50 and 100 mM, respectively. Calculations of Derjaguin, Landau, Verwey and Overbeek (DLVO) interaction energy were in agreement with stability results, and showed the formation of substantial energy barriers at low IS indicating greater nZVI stability. Our results suggest that at IS above 50 mM and nZVI particle concentration larger than 0.1 g L−1, the likelihood of nZVI aggregation is high. Nevertheless, CMC polymer stabilizer would enhance the stability and transport of nZVI even under these unfavorable solution chemistry conditions.
Hesham M. Ibrahim; Mohammed Awad; Abdullah S. Al-Farraj; Ali M. Al-Turki. Stability and Dynamic Aggregation of Bare and Stabilized Zero-Valent Iron Nanoparticles under Variable Solution Chemistry. Nanomaterials 2020, 10, 192 .
AMA StyleHesham M. Ibrahim, Mohammed Awad, Abdullah S. Al-Farraj, Ali M. Al-Turki. Stability and Dynamic Aggregation of Bare and Stabilized Zero-Valent Iron Nanoparticles under Variable Solution Chemistry. Nanomaterials. 2020; 10 (2):192.
Chicago/Turabian StyleHesham M. Ibrahim; Mohammed Awad; Abdullah S. Al-Farraj; Ali M. Al-Turki. 2020. "Stability and Dynamic Aggregation of Bare and Stabilized Zero-Valent Iron Nanoparticles under Variable Solution Chemistry." Nanomaterials 10, no. 2: 192.
The data from twelve representative soil profiles on six harrats (two profiles from each Harrat) within the Arabian Shield are presented, including full morphological descriptions made during the field the soil survey. A number of selected physicochemical and mineralogical analyses were also conducted in the laboratory and the data were interpreted to examine the possibility of the presence of andic/vitric soil properties in the studied soils, and thus the existence of Andisols in the harrats soils. The existence of andic/vitric properties in soils is not typical of regions characterized by aridic and hyperthermic soil moisture and temperature regimes, respectively, and is probably due to the influence of paleoclimatic conditions. The data is available online for further reuse and to provide a better understanding of the findings linked to this research.
Magboul M. Sulieman; Abdelazeem Sh Sallam; Abdullah S. Al-Farraj; Eric C. Brevik. Dataset on the existence of andisols under aridic-hyperthermic environments in the harrats region of the Arabian Shield. Data in Brief 2020, 28, 105072 .
AMA StyleMagboul M. Sulieman, Abdelazeem Sh Sallam, Abdullah S. Al-Farraj, Eric C. Brevik. Dataset on the existence of andisols under aridic-hyperthermic environments in the harrats region of the Arabian Shield. Data in Brief. 2020; 28 ():105072.
Chicago/Turabian StyleMagboul M. Sulieman; Abdelazeem Sh Sallam; Abdullah S. Al-Farraj; Eric C. Brevik. 2020. "Dataset on the existence of andisols under aridic-hyperthermic environments in the harrats region of the Arabian Shield." Data in Brief 28, no. : 105072.
Efficient application of nanoscale zero-valent iron (nZVI) particles in remediation processes relies heavily on the ability to modify the surfaces of nZVI particles to enhance their stability and mobility in subsurface layers. We investigated the effect of sodium carboxy-methyl-cellulose (CMC) polymer stabilizer, pH, particle concentration, and flow rate on the transport of nZVI particles in sand columns. Breakthrough curves (BTCs) of nZVI particles indicated that the transport of nZVI particles was increased by the presence of CMC and by increasing the flow rate. The relative concentration (RC) of the eluted CMC–nZVI nanoparticles was larger at pH 9 as compared to RC at pH 7. This is mainly attributed to the increased nZVI particle stability at higher pH due to the increase in the electrostatic repulsion forces and the formation of larger energy barriers. nZVI particle deposition was larger at 0.1 cm min-1 flow due to the increased residence time, which increases the aggregation and settlement of particles. The amount of CMC–nZVI particles eluted from the sand columns was increased by 52% at the maximum flow rate of 1.0 cm min-1. Bare nZVI were mostly retained in the first millimeters of the soil column, and the amount eluted did not exceed 1.2% of the total amount added. Our results suggest that surface modification of nZVI particles was necessary to increase stability and enhance transport in sandy soil. Nevertheless, a proper flow rate, suitable for the intended remediation efforts, must be considered to minimize nZVI particle deposition and increase remediation efficiency.
Hesham M. Ibrahim; Mohammed Awad; Abdullah S. Al-Farraj; Ali M. Al-Turki. Effect of Flow Rate and Particle Concentration on the Transport and Deposition of Bare and Stabilized Zero-Valent Iron Nanoparticles in Sandy Soil. Sustainability 2019, 11, 6608 .
AMA StyleHesham M. Ibrahim, Mohammed Awad, Abdullah S. Al-Farraj, Ali M. Al-Turki. Effect of Flow Rate and Particle Concentration on the Transport and Deposition of Bare and Stabilized Zero-Valent Iron Nanoparticles in Sandy Soil. Sustainability. 2019; 11 (23):6608.
Chicago/Turabian StyleHesham M. Ibrahim; Mohammed Awad; Abdullah S. Al-Farraj; Ali M. Al-Turki. 2019. "Effect of Flow Rate and Particle Concentration on the Transport and Deposition of Bare and Stabilized Zero-Valent Iron Nanoparticles in Sandy Soil." Sustainability 11, no. 23: 6608.
Anwar A. Aly; Khalid N. S. Alashgar; Abdullah S. Al-Farraj; Hesham Ibrahim. Contaminants and salinity removal of olive mill wastewater using zeolite nanoparticles. Separation Science and Technology 2018, 53, 1638 -1653.
AMA StyleAnwar A. Aly, Khalid N. S. Alashgar, Abdullah S. Al-Farraj, Hesham Ibrahim. Contaminants and salinity removal of olive mill wastewater using zeolite nanoparticles. Separation Science and Technology. 2018; 53 (11):1638-1653.
Chicago/Turabian StyleAnwar A. Aly; Khalid N. S. Alashgar; Abdullah S. Al-Farraj; Hesham Ibrahim. 2018. "Contaminants and salinity removal of olive mill wastewater using zeolite nanoparticles." Separation Science and Technology 53, no. 11: 1638-1653.
A comparison between two digestion methods of hot plate Hossner (total-total) and USEPA method 3051 (total-recoverable) was carried out to suggest a proper method for determining nine heavy metals (Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn) content of three urban soils affected by mining (Mahd AD'Dahab) or industrial activities (Riyadh and Jubail) at Saudi Arabia. The results showed no significant differences between two digestion methods for Cd, Cu, Pb and Zn in soils affected by mining and for Cr, Cu, Pb and Zn in soils affected by industrial activities. Additionally, lower biases were obtained between two methods for metals Cd, Cu, Zn and Pb in the urban soil samples from mining area with the percent biases of -16.5%, +6.24%, -12.4% and +24.1%, respectively. The results also revealed that only Cu and Zn in the soil samples from Riyadh were extracted satisfactorily using USEPA 3051 with low biases of +5.69% and -9.61%, respectively. Meanwhile, only Pb in soil samples from Jubail showed lower baise between two methods with satisfactory biase of -8.07%. The correlation coefficients were significant between total-recoverable and total-total concentrations for Cu (r = 0.66), Pb (r = 0.72) and Cd (r = 0.65) in soil samples from mining area. Overall, concentrations of Co, Cr, Fe, Mn, and Ni that may show soil background concentrations were found higher by Hossner method than by USEPA 3051; thus, this suggests the addition of hydrofluoric acid (HF) is necessary for the determination of lithogenic metal concentrations. It could be concluded that the USEPA 3051 may be recommended and applied for total Cd, Cu, Pb and Zn originated from anthropogenic source in mining and industrial areas.
Khaled A.M. Alsaleh; Helmut Meuser; Adel R.A. Usman; Mohammad I. Al-Wabel; Abdullah S. Al-Farraj. A comparison of two digestion methods for assessing heavy metals level in urban soils influenced by mining and industrial activities. Journal of Environmental Management 2018, 206, 731 -739.
AMA StyleKhaled A.M. Alsaleh, Helmut Meuser, Adel R.A. Usman, Mohammad I. Al-Wabel, Abdullah S. Al-Farraj. A comparison of two digestion methods for assessing heavy metals level in urban soils influenced by mining and industrial activities. Journal of Environmental Management. 2018; 206 ():731-739.
Chicago/Turabian StyleKhaled A.M. Alsaleh; Helmut Meuser; Adel R.A. Usman; Mohammad I. Al-Wabel; Abdullah S. Al-Farraj. 2018. "A comparison of two digestion methods for assessing heavy metals level in urban soils influenced by mining and industrial activities." Journal of Environmental Management 206, no. : 731-739.
Unfortunately, in the original publication of the article, Prof. Yang Sik Ok’s affiliation was incorrectly published. The author’s affiliation is as follows.
Mohammad I. Al-Wabel; Adel Usman; Abdullah S. Al-Farraj; Yong Sik Ok; Adel Abduljabbar; Abdelazeem S. Sallam. Correction to: Date palm waste biochars alter a soil respiration, microbial biomass carbon, and heavy metal mobility in contaminated mined soil. Environmental Geochemistry and Health 2017, 41, 1809 -1809.
AMA StyleMohammad I. Al-Wabel, Adel Usman, Abdullah S. Al-Farraj, Yong Sik Ok, Adel Abduljabbar, Abdelazeem S. Sallam. Correction to: Date palm waste biochars alter a soil respiration, microbial biomass carbon, and heavy metal mobility in contaminated mined soil. Environmental Geochemistry and Health. 2017; 41 (4):1809-1809.
Chicago/Turabian StyleMohammad I. Al-Wabel; Adel Usman; Abdullah S. Al-Farraj; Yong Sik Ok; Adel Abduljabbar; Abdelazeem S. Sallam. 2017. "Correction to: Date palm waste biochars alter a soil respiration, microbial biomass carbon, and heavy metal mobility in contaminated mined soil." Environmental Geochemistry and Health 41, no. 4: 1809-1809.
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 composites were used for the removal of Cr(VI) from an aqueous solution. Additionally, their effects on soluble ions of tannery wastewater were investigated. The produced composites were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). The results showed that Cr(VI) removal is dependent upon initial concentrations and pH. The adsorption quantity of Cr(VI) onto the polymerized clay deposit followed by polymerized zeolite exhibited higher values than their original samples. The polymer-clay composite of clay deposit showed the highest removal of 76.3–100% overall initial concentrations of 10–50 mg L−1 and at initial pH of 2. Kinetics of Cr(VI) removal by various sorbents was predicted using a pseudo–second order model. Our findings showed that the levels of salinity and various soluble ions (Cr2+, Na+, Cl− and SO42−) in tannery wastewater are very high, and their levels were reduced after treatment, especially by polymerized sorbents. It could be concluded that the polymer-clay composites may be employed as a highly efficient sorbent for the removal of Cr(VI) and toxic ions from the wastewater.
Abd El-Azeem Sallam; Mateb S. Al-Zahrani; Mohammad I. Al-Wabel; Abdullah S. Al-Farraj; Adel R. A. Usman. Removal of Cr(VI) and Toxic Ions from Aqueous Solutions and Tannery Wastewater Using Polymer-Clay Composites. Sustainability 2017, 9, 1993 .
AMA StyleAbd El-Azeem Sallam, Mateb S. Al-Zahrani, Mohammad I. Al-Wabel, Abdullah S. Al-Farraj, Adel R. A. Usman. Removal of Cr(VI) and Toxic Ions from Aqueous Solutions and Tannery Wastewater Using Polymer-Clay Composites. Sustainability. 2017; 9 (11):1993.
Chicago/Turabian StyleAbd El-Azeem Sallam; Mateb S. Al-Zahrani; Mohammad I. Al-Wabel; Abdullah S. Al-Farraj; Adel R. A. Usman. 2017. "Removal of Cr(VI) and Toxic Ions from Aqueous Solutions and Tannery Wastewater Using Polymer-Clay Composites." Sustainability 9, no. 11: 1993.
Heavy metals in the site received industrial effluents were investigated to assess the pollution levels, distribution of metal among solid-phase fractions and possible metal sources. The soil samples at different depths of 0–5, 5–25 and 25–50 cm were collected and analyzed for Fe, Mn, Cd, Zn, Cu, Ni and Pb. Among all metals, Cd content was not detected in all soil samples. The average contents of Pb and Zn are higher than the corresponding values of common range in earth crust. Meanwhile, the maximum contents of Cu and Zn are higher than those of Dutch optimum value but lower that the Dutch protection act target value. The maximum contents of Cu, Pb and Zn are higher than the average shale value. The most investigated heavy metals are mostly found in the potentially labile pool (>50.0%) including metal bound to carbonate, Fe/Mn oxides, or organically fractions. Enrichment factor (EF) in combination with multivariate analysis including principal component analysis (PCA) and hierarchical cluster analysis (HCA) suggest that Mn and Ni associated with Fe in the soil samples were primarily originated from lithogenic sources. Pb was largely derived only from anthropogenic source, while Cu and Zn in the soil samples were controlled by the mixed natural and anthropogenic sources. These results suggest that discharging the industrial effluents into dumping site increased pollution level of Pb, Zn and Cu as well as enhanced their potentially labile pool that may be responsible for occurring potential toxic impacts on environmental quality.
Adel Usman; Abdulelah Abdullah Almutairi; Salem Elmaghraby; Abdullah S. Al-Farraj. Levels, solid-phase fractions and sources of heavy metals at site received industrial effluents: a case study. Chemical Speciation & Bioavailability 2017, 29, 78 -88.
AMA StyleAdel Usman, Abdulelah Abdullah Almutairi, Salem Elmaghraby, Abdullah S. Al-Farraj. Levels, solid-phase fractions and sources of heavy metals at site received industrial effluents: a case study. Chemical Speciation & Bioavailability. 2017; 29 (1):78-88.
Chicago/Turabian StyleAdel Usman; Abdulelah Abdullah Almutairi; Salem Elmaghraby; Abdullah S. Al-Farraj. 2017. "Levels, solid-phase fractions and sources of heavy metals at site received industrial effluents: a case study." Chemical Speciation & Bioavailability 29, no. 1: 78-88.
Olive mill wastewater (OMW), a liquid by-product of the olive oil industry, represents a severe environmental problem owing to its high pollution load. In this study, successive columns containing different types of natural materials were investigated for their OMW treatment efficiency. Passing OMW through three columns of gravel, fine sand, and a mixture of acidified cotton and zeolite (weight:weight ratio of cotton:clinoptilolite of 2:1), followed by treatment with activated charcoal (AC) and lime, was the best treatment in terms of the quality of water obtained. This treatment decreased concentrations of NO3−, B, K, P, and total fat in OMW by mean percentages of 78.0, 92.4, 66.6, 48.3, and 93.3%, respectively. Furthermore, it decreased OMW turbidity and electric conductivity (EC) by 96.8 and 48.4%, respectively. Most contaminants were removed from the OMW in the cotton/clinoptilolite column owing to the high sorption affinity of clinoptilolite on its active sites. The AC was efficient for organic particle removal; meanwhile, lime was used to raise the pH of the treated OMW (TOMW) from 2.9 to 5.1. This simple method enables us to obtain environmentally friendly TOMW that can be safely used for irrigation.
Anwar A. Aly; Yousef N.Y. Hasan; Abdullah S. Al-Farraj. Olive mill wastewater treatment using a simple zeolite-based low-cost method. Journal of Environmental Management 2014, 145, 341 -348.
AMA StyleAnwar A. Aly, Yousef N.Y. Hasan, Abdullah S. Al-Farraj. Olive mill wastewater treatment using a simple zeolite-based low-cost method. Journal of Environmental Management. 2014; 145 ():341-348.
Chicago/Turabian StyleAnwar A. Aly; Yousef N.Y. Hasan; Abdullah S. Al-Farraj. 2014. "Olive mill wastewater treatment using a simple zeolite-based low-cost method." Journal of Environmental Management 145, no. : 341-348.
The concentrations of nine heavy metals (Fe, Mn, Zn, Cu, Ni, Cd, Cr, Co, and Pb) in soil samples of Arabian Gulf coast, Saudi Arabia, were investigated. Sediment Quality Guideline (SQGs), SQG-Quotient (SQG-Q), toxicity degree index (TDI), enrichment factor (EF), and multivariate analysis, including principle component analysis (PCA) and hierarchical cluster analysis (HCA), were used to measure heavy metals of concern in the study area and to identify their possible sources. The results showed that the concentrations of different heavy metals were 530–5,700 mg kg? 1 for Fe; 9–150 mg kg−1 for Mn and 8–69 mg kg−1 for Zn; 1–21 mg kg−1 for Cu and not detectable—17 mg kg−1 for Ni; 6.9–130 mg kg−1 for Cr and not detectable—5 mg kg−1 for Co; and not detectable—24 mg kg−1 for Pb. Based on SQGs, only the maximum and mean Cr concentrations of study area were in heavy and moderate rates of pollution, respectively. The values of SQG-Q and TDI revealed that the investigated sampling points showed the lowest potential of adverse biological effects. The considerable number of collected soil samples has relatively higher EF values of 5–20 for Zn, Cu, Cr, and Pb, suggesting that these four metals may be derived from anthropogenic origin. Multivariate analysis also confirmed this finding that the sources of Zn, Cu, and Pb resulted primarily from anthropogenic sources, whereas Co, Ni, Fe, and Mn were mainly attributed to lithogenic sources. It could be generally concluded that it is possible to use multivariate analyses in combination with EF values as useful tools to identify the natural or anthropogenic sources of heavy metals in soils.
Fahad I. Almasoud; Adel R. Usman; Abdullah S. Al-Farraj; Fahad Almasoud. Heavy metals in the soils of the Arabian Gulf coast affected by industrial activities: analysis and assessment using enrichment factor and multivariate analysis. Arabian Journal of Geosciences 2014, 8, 1691 -1703.
AMA StyleFahad I. Almasoud, Adel R. Usman, Abdullah S. Al-Farraj, Fahad Almasoud. Heavy metals in the soils of the Arabian Gulf coast affected by industrial activities: analysis and assessment using enrichment factor and multivariate analysis. Arabian Journal of Geosciences. 2014; 8 (3):1691-1703.
Chicago/Turabian StyleFahad I. Almasoud; Adel R. Usman; Abdullah S. Al-Farraj; Fahad Almasoud. 2014. "Heavy metals in the soils of the Arabian Gulf coast affected by industrial activities: analysis and assessment using enrichment factor and multivariate analysis." Arabian Journal of Geosciences 8, no. 3: 1691-1703.
This study investigated two digestion methods (USEPA 3051: microwave, HNO3 or Hossner: hot plate, HF–H2SO4–HClO4) for heavy metals analysis in contaminated soil surrounding Mahad AD'Dahab mine, Saudi Arabia. Moreover, contamination metal levels were estimated. The Hossner and USEPA 3051 methods showed, respectively, average total contents of 17.2 and 18.1 mg kg−1 for Cd, 11.6 and 10.6 mg kg−1 for Co, 45.7 and 34.7 mg kg−1 for Cr, 1030 and 1100 mg kg−1 for Cu, 33,300 and 27,400 mg kg−1 for Fe, 963 and 872 mg kg−1 for Mn, 33.2 and 22.8 mg kg−1 for Ni, 791 and 782 mg kg−1for Pb, and 6320 and 2870 mg kg−1 for Zn. A lack of significant differences and a high correlation coefficient (>90%) for Cd, Pb and Cu between the two digestion methods suggest that the total-recoverable method (USEPA 3051) may be equivalent to the total-total digestion method (Hossner) for determining these metals in the studied soil. However, significantly higher concentrations of Cr, Fe, Ni and Zn were found by the Hossner method comapred with the USEPA 3051 method. The soil samples have very or extremely high levels of Zn, Cu, Cd and Pb contamination, indicating very high potential ecological risk.
Abdullah Al-Farraj; Adel R. A. Usman; Saad H. M. Al Otaibi. Assessment of heavy metals contamination in soils surrounding a gold mine: comparison of two digestion methods. Chemistry and Ecology 2013, 29, 329 -339.
AMA StyleAbdullah Al-Farraj, Adel R. A. Usman, Saad H. M. Al Otaibi. Assessment of heavy metals contamination in soils surrounding a gold mine: comparison of two digestion methods. Chemistry and Ecology. 2013; 29 (4):329-339.
Chicago/Turabian StyleAbdullah Al-Farraj; Adel R. A. Usman; Saad H. M. Al Otaibi. 2013. "Assessment of heavy metals contamination in soils surrounding a gold mine: comparison of two digestion methods." Chemistry and Ecology 29, no. 4: 329-339.
The aim of this research is to evaluate arsenic distribution and associated hydrogeochemical parameters in 27 randomly selected boreholes representing aquifers in the Al-Kharj geothermal fields of Saudi Arabia. Arsenic was detected at all sites, with 92.5% of boreholes yielding concentrations above the WHO permissible limit of 10 μg/L. The maximum concentration recorded was 122 μg/L (SD = 29 μg/L skewness = 1.87). The groundwater types were mainly Ca+2-Mg+2-SO4-2-Cl−and Na+-Cl−-SO4-2, accounting for 67% of the total composition. Principal component analysis (PCA) showed that the main source of arsenic release was geothermal in nature and was linked to processes similar to those involved in the release of boron. The PCA yielded five components, which accounted for 44.1%, 17.0%, 10.1%, 08.4%, and 06.5% of the total variance. The first component had positive loadings for arsenic and boron along with other hydrogeochemical parameters, indicating the primary sources of As mobilization are derived from regional geothermal systems and weathering of minerals. The remaining principal components indicated reductive dissolution of iron oxyhydroxides as a possible mechanism. Spatial evaluation of the PCA results indicated that this secondary mechanism of arsenic mobilization may be active and correlates positively with total organic carbon. The aquifers were found to be contaminated to a high degree with organic carbon ranging from 0.57 mg/L to 21.42 mg/L and showed high concentrations ofNO3-ranging from 8.05 mg/L to 248.2 mg/L.
Abdullah Al-Farraj; Mohammad I. Al-Wabel; Mohamed Hamza El-Saeid; Ahmed H. El-Naggar; Zaheer Ahmed. Evaluation of Groundwater for Arsenic Contamination Using Hydrogeochemical Properties and Multivariate Statistical Methods in Saudi Arabia. Journal of Chemistry 2012, 2013, 1 -9.
AMA StyleAbdullah Al-Farraj, Mohammad I. Al-Wabel, Mohamed Hamza El-Saeid, Ahmed H. El-Naggar, Zaheer Ahmed. Evaluation of Groundwater for Arsenic Contamination Using Hydrogeochemical Properties and Multivariate Statistical Methods in Saudi Arabia. Journal of Chemistry. 2012; 2013 ():1-9.
Chicago/Turabian StyleAbdullah Al-Farraj; Mohammad I. Al-Wabel; Mohamed Hamza El-Saeid; Ahmed H. El-Naggar; Zaheer Ahmed. 2012. "Evaluation of Groundwater for Arsenic Contamination Using Hydrogeochemical Properties and Multivariate Statistical Methods in Saudi Arabia." Journal of Chemistry 2013, no. : 1-9.
Abdullah Al-Farraj. Mineralogical Composition of Limestone Rock and Soil from Jubaila Formation. Asian Journal of Earth Sciences 2011, 4, 203 -213.
AMA StyleAbdullah Al-Farraj. Mineralogical Composition of Limestone Rock and Soil from Jubaila Formation. Asian Journal of Earth Sciences. 2011; 4 (4):203-213.
Chicago/Turabian StyleAbdullah Al-Farraj. 2011. "Mineralogical Composition of Limestone Rock and Soil from Jubaila Formation." Asian Journal of Earth Sciences 4, no. 4: 203-213.
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 of Riyadh landfill leachates, 80 representative landfill leachate samples were collected and analyzed from February to May 2008. The analysis of landfill leachates includes pH, ECw, concentrations of soluble ions, chemical oxygen demand (COD), total suspended solids (TSS), and heavy metals contents. The obtained results showed that the landfill leachates are characterized by high concentrations of COD (13,900–22,350)mgL−1, TSS of (2280–8912)mgL−1, ECw values of (42.5–58.3)dSm−1 but the pH values ranged 5.49–6.32. Moreover, the leachates had higher concentrations of soluble Na+, K+, Ca2+, Mg2+, Cl−, HCO3- and SO42-. In addition, the leachates contained Fe, Mn, As, Ni, Cr, Zn and Cu in concentrations equivalent to: 104, 11.0, 1.4, 0.6, 0.25, 0.2 and 0.14mgL−1, respectively. While in the bio-solids (landfill sediments) the average content of Cd, Cr, Cu, Fe, Mn, Mo, Ni and V reached to 10, 242, 234, 48,608, 190, 18, 166 and 24mgkg−1. The relatively higher variations between the upper and lower limits (maximum and minimum values) of the studying parameters lead to conclude that it is essential to conduct a long-term monitoring program to obtain representative information and this fluctuation should be considered when operating the leachate treatment plant
M.I. Al-Wabel; W.S. Al Yehya; A.S. Al-Farraj; S.E. El-Maghraby; Abdullah Al-Farraj. Characteristics of landfill leachates and bio-solids of municipal solid waste (MSW) in Riyadh City, Saudi Arabia. Journal of the Saudi Society of Agricultural Sciences 2011, 10, 65 -70.
AMA StyleM.I. Al-Wabel, W.S. Al Yehya, A.S. Al-Farraj, S.E. El-Maghraby, Abdullah Al-Farraj. Characteristics of landfill leachates and bio-solids of municipal solid waste (MSW) in Riyadh City, Saudi Arabia. Journal of the Saudi Society of Agricultural Sciences. 2011; 10 (2):65-70.
Chicago/Turabian StyleM.I. Al-Wabel; W.S. Al Yehya; A.S. Al-Farraj; S.E. El-Maghraby; Abdullah Al-Farraj. 2011. "Characteristics of landfill leachates and bio-solids of municipal solid waste (MSW) in Riyadh City, Saudi Arabia." Journal of the Saudi Society of Agricultural Sciences 10, no. 2: 65-70.
Abdullah Al-Farraj; M. I. Al-Wabel; T. S. Al-Shahrani; S. E. El-Maghraby; M. A. S. Al-Sewailem. Accumulation coefficient and translocation factor of heavy metals throughRhazya strictagrown in the mining area of Mahad AD’Dahab, Saudi Arabia. WASTE MANAGEMENT 2010 2010, 140, 325 -336.
AMA StyleAbdullah Al-Farraj, M. I. Al-Wabel, T. S. Al-Shahrani, S. E. El-Maghraby, M. A. S. Al-Sewailem. Accumulation coefficient and translocation factor of heavy metals throughRhazya strictagrown in the mining area of Mahad AD’Dahab, Saudi Arabia. WASTE MANAGEMENT 2010. 2010; 140 ():325-336.
Chicago/Turabian StyleAbdullah Al-Farraj; M. I. Al-Wabel; T. S. Al-Shahrani; S. E. El-Maghraby; M. A. S. Al-Sewailem. 2010. "Accumulation coefficient and translocation factor of heavy metals throughRhazya strictagrown in the mining area of Mahad AD’Dahab, Saudi Arabia." WASTE MANAGEMENT 2010 140, no. : 325-336.
The plant species Ochradenus baccatus, which naturally grows around the Mahad AD’Dahab Mine, has been selected for study due to its ability...
Abdullah Al-Farraj; T. G. Al-Otabi; M. I. Al-Wabel. Accumulation coefficient and translocation factor of heavy metals throughOchradenus baccatusplant grown on mining area at Mahad AD'Dahab, Saudi Arabia. Ecosytems and Sustainable Development VII 2009, 122, 459 -468.
AMA StyleAbdullah Al-Farraj, T. G. Al-Otabi, M. I. Al-Wabel. Accumulation coefficient and translocation factor of heavy metals throughOchradenus baccatusplant grown on mining area at Mahad AD'Dahab, Saudi Arabia. Ecosytems and Sustainable Development VII. 2009; 122 ():459-468.
Chicago/Turabian StyleAbdullah Al-Farraj; T. G. Al-Otabi; M. I. Al-Wabel. 2009. "Accumulation coefficient and translocation factor of heavy metals throughOchradenus baccatusplant grown on mining area at Mahad AD'Dahab, Saudi Arabia." Ecosytems and Sustainable Development VII 122, no. : 459-468.
Abdullah Al-Farraj. The Mineralogy of Clay Fractions in the Soils of the Southern Region of Jazan, Saudi Arabia. Journal of Agronomy 2008, 7, 115 -126.
AMA StyleAbdullah Al-Farraj. The Mineralogy of Clay Fractions in the Soils of the Southern Region of Jazan, Saudi Arabia. Journal of Agronomy. 2008; 7 (2):115-126.
Chicago/Turabian StyleAbdullah Al-Farraj. 2008. "The Mineralogy of Clay Fractions in the Soils of the Southern Region of Jazan, Saudi Arabia." Journal of Agronomy 7, no. 2: 115-126.
Abdullah Al-Farraj. Heavy Metals Accumulation of Some Plant Species Grown on Mining Area at Mahad AD’Dahab, Saudi Arabia. Journal of Applied Sciences 2007, 7, 1170 -1175.
AMA StyleAbdullah Al-Farraj. Heavy Metals Accumulation of Some Plant Species Grown on Mining Area at Mahad AD’Dahab, Saudi Arabia. Journal of Applied Sciences. 2007; 7 (8):1170-1175.
Chicago/Turabian StyleAbdullah Al-Farraj. 2007. "Heavy Metals Accumulation of Some Plant Species Grown on Mining Area at Mahad AD’Dahab, Saudi Arabia." Journal of Applied Sciences 7, no. 8: 1170-1175.