Sediment Metal Contamination, Bioavailability, and Oxidative Stress Response in Mangrove Avicennia marina in Central Red Sea

Anthropogenic activities have been on the increase in the urban environment and have led to contamination of the environment with toxic metals. However, mangrove plants’ response to heavy metal stress due to anthropogenic activities explains the metal bioavailability and its potential ecotoxicological effect. We carried out a multi-approach study to investigate i) if the concentrations of metals (Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Mo, Cd, Pb, Sr, and V) in mangroves at the central Red Sea are due to the anthropogenic influence and are above the sediment quality guidelines and ii) if an increase in metal concentration influences height and antioxidant enzyme (catalase, CAT; glutathione S-transferase, GST; and superoxide dismutase, SOD) activities in Avicennia marina. There were significant variations (p < 0.05) in metal concentrations and antioxidants across the six mangrove ecosystems with higher concentrations at Al Lith (LT) and south Jeddah (SJ). Even though the concentrations of metals in mangrove leaves are slightly higher in LT than SJ, principal component analysis showed that higher concentrations of Cr, Co, Zn, Cd, and Pb in mangrove leaves from SJ influence higher antioxidant enzyme activities and the lowest average mangrove height (2.01 m). This suggests that higher metal concentrations be factors for the biggest stress in these mangrove ecosystems. However, among the 13 metals, Cr (82.07 mg/kg), Cu (41.29 mg/kg), and As (10.30 mg/kg) in sediments have values within the ERL range of probable effect, while Ni (53.09 mg/kg) was above the ERM threshold. Hence, there is need to focus on monitoring these metals in mangrove sediments and their anthropogenic sources.

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Trace Metal Contamination Characteristics and Health Risks Assessment ofCommelina africanaL. and Psammitic Sandflats in the Niger Delta, Nigeria

Applied and Environmental Soil Science ◽

10.1155/2016/8178901 ◽

2016 ◽

Vol 2016 ◽

pp. 1-14 ◽

Cited By ~ 5

Author(s):

Nsikak U. Benson ◽

Paul A. Enyong ◽

Omowunmi H. Fred-Ahmadu

Keyword(s):

Trace Metal ◽

Niger Delta ◽

Anthropogenic Activities ◽

Hazard Quotient ◽

Risk Index ◽

Sediment Quality ◽

Hazard Index ◽

Adult Males ◽

Metal Concentrations ◽

Metal Levels

The purpose of this study was to investigate and quantify trace metal concentrations inCommelina africanaL. and psammitic sandflats from an intertidal coastal ecosystem in Niger Delta, Nigeria, and to evaluate their spatial distribution, degree of contamination, and source apportionment. The environmental risks associated with soil contamination were elaborately assessed using potential ecological risk index, sediment quality guidelines, and enrichment relative to background levels. The mean concentrations of Cd, Cr, Ni, Pb, and Zn in sandflat soil samples are0.76±9.0×10-2,7.39±8.7×10-1,2.28±0.35,0.024±4.0×10-3, and74.51±2.55 mg/kg, respectively. Metal levels indicate strong variability with sampling sites. The order of trace metal concentrations in theCommelina africanaL. samples isZn>Ni>Cr>Pb>Cd. The concentrations varied with the sample locations; and the levels of Pb (0.05 to 0.08 mg/kg) at all locations are found to be significantly below permissible level of 0.3 mg/kg. Potential sources of metal loadings may be associated with localised or diffused anthropogenic activities. The average carcinogenic risks are below1.0×10-6threshold values, and the sandflat soils are not considered to pose significant health effects to children and adult males and females. However, the carcinogenicity and noncarcinogenicity risks ranking decrease following the orderchildren>adult males>adult females. Comparatively, the hazard quotient and hazard index indicate that the psammitic sandflats might pose a health risk to children in future.

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Metal speciation and pollution assessment across a small-scale mining creek system tributary

10.21203/rs.3.rs-617153/v1 ◽

2021 ◽

Author(s):

Elmer S Austria ◽

Ericho Jeanne M. Fuentes ◽

Rheo Baguio Lamorena-Lim

Keyword(s):

Metal Speciation ◽

Total Concentration ◽

Sediment Quality ◽

Toxic Metal ◽

Colloidal Suspensions ◽

Pollution Assessment ◽

Anthropogenic Sources ◽

Small Scale ◽

Environmental Index ◽

Metal Concentrations

Abstract Sediment and water samples along Acupan creek were examined to assess the degree of toxic metal pollution due to anthropogenic wastes from small-scale gold mining activity in the area. Samples were collected from five different locations representing the upstream, midstream and downstream areas of the creek. The total concentration of As, Cd, Cu and Pb in the sediment and aqueous matrix were determined. Chemical speciation of the target metals in the creek system was performed using geochemical software PHREEQC. The metal concentrations in the sediments of midstream and downstream were higher compared to the average shale value (ASV) and toxicological reference values (TRV). Similarly, the total metal concentrations of As and Cu in creek water exceeded the local guidelines set for effluent waters. Speciation results identified HAsO42−, Cd2+, CuOH+ and PbOH+ as the major species of the target metals. Metal supersaturation in sediment and low solubility in the aqueous matrix point out to re-suspension and transport of metals as colloidal suspensions. The enrichment factor and geo-accumulation index values indicate significant levels of enrichment and pollution in the midstream and downstream area. The pollution load index confirmed the progressive deterioration of the sediment quality along the creek. Speciation and environmental index results confirmed that anthropogenic sources in the midstream were transported to the downstream catchment.

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Physico-chemical trends in the sediments of Agbede Wetlands, Nigeria

Materials and Geoenvironment ◽

10.1515/rmzmag-2017-0009 ◽

2017 ◽

Vol 64 (2) ◽

pp. 111-126

Author(s):

Abdul-Rahman Dirisu ◽

John Ovie Olomukoro ◽

Ifeanyi Maxwell Ezenwa

Keyword(s):

Alkali Metals ◽

Anthropogenic Activities ◽

Sediment Quality ◽

Principal Component ◽

Mean Values ◽

Physico Chemical ◽

Lotic System ◽

The Mean ◽

And Cluster Analysis ◽

Chemical Trends

AbstractThis study assessed the physico-chemical status of sediments in the Agbede Wetlands with the aim to create a reference archive for the Edo North catchment and to further identify the characteristics mostly influenced by the natural and anthropogenic activities going on at the watershed. Nutrients, zinc, nickel and lead were identified to be mostly of anthropogenic origin, while alkali metals and alkaline earth metals were from both anthropogenic and natural sources. The clustering of stations 1 and 4 indicates that the sediment quality in the lentic systems was not completely excluded from the lotic system, suggesting that principal component analysis (PCA) and cluster analysis (CA) techniques are invaluable tools for identifying factors influencing the sediment quality. The mean values of the particle size distribution were in the following order across the ecosystems: sand (61.86–80.53%) > silt (9.75–30.34%) > clay (7.83–13.89%). The contamination of the water bodies was primarily derived from agricultural run-offs and through geochemical weathering of the top soils. Therefore, our analysis indicates that the concentrations of cations, anions and nutrients in the sediments of the lotic and lentic ecosystems in Agbede Wetlands are not at an alarming level.

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Large global variations in measured airborne metal concentrations driven by anthropogenic sources

Scientific Reports ◽

10.1038/s41598-020-78789-y ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Jacob McNeill ◽

Graydon Snider ◽

Crystal L. Weagle ◽

Brenna Walsh ◽

Paul Bissonnette ◽

...

Keyword(s):

Particulate Matter ◽

Transport Model ◽

Anthropogenic Activities ◽

Ambient Air ◽

Mitigation Strategies ◽

Anthropogenic Sources ◽

World Health ◽

Risk Level ◽

Potential Health ◽

Metal Concentrations

AbstractGlobally consistent measurements of airborne metal concentrations in fine particulate matter (PM2.5) are important for understanding potential health impacts, prioritizing air pollution mitigation strategies, and enabling global chemical transport model development. PM2.5 filter samples (N ~ 800 from 19 locations) collected from a globally distributed surface particulate matter sampling network (SPARTAN) between January 2013 and April 2019 were analyzed for particulate mass and trace metals content. Metal concentrations exhibited pronounced spatial variation, primarily driven by anthropogenic activities. PM2.5 levels of lead, arsenic, chromium, and zinc were significantly enriched at some locations by factors of 100–3000 compared to crustal concentrations. Levels of metals in PM2.5 and PM10 exceeded health guidelines at multiple sites. For example, Dhaka and Kanpur sites exceeded the US National Ambient Air 3-month Quality Standard for lead (150 ng m−3). Kanpur, Hanoi, Beijing and Dhaka sites had annual mean arsenic concentrations that approached or exceeded the World Health Organization’s risk level for arsenic (6.6 ng m−3). The high concentrations of several potentially harmful metals in densely populated cites worldwide motivates expanded measurements and analyses.

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Fractionation and Distribution of Rare Earth Elements in Marine Sediment and Bioavailability in Avicennia marina in Central Red Sea Mangrove Ecosystems

Plants ◽

10.3390/plants10061233 ◽

2021 ◽

Vol 10 (6) ◽

pp. 1233

Author(s):

Abdullahi Bala Alhassan ◽

Mohammed Othman Aljahdali

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Red Sea ◽

Rare Earth Element ◽

Earth Element ◽

Avicennia Marina ◽

Sediment Grain Size ◽

Elemental Ratio ◽

Mangrove Ecosystems ◽

Element Fractionation

Rare earth element fractionation and distribution in the coastal ecosystem have been of significant concern and are recognized worldwide as emerging micro-pollutants. However, unlike other metals such as trace elements, little is known about their uptake by aquatic plants such as the mangrove Avicennia marina, especially in the central Red Sea. We investigated the fractionation of rare earth elements in six mangrove ecosystems in the central Red Sea and bioavailability in mangrove A. marina. The concentrations of rare earth elements, sediment grain sizes, multi-elemental ratios, geo-accumulation index (Igeo) and bioconcentration factor (BCF) vary significantly (p < 0.05) across the six mangrove ecosystems. Higher concentrations of rare earth elements were recorded at Al Lith (LT) (101.53 mg/kg) and South Jeddah (SJ) (73.38 mg/kg) mangrove ecosystems. However, multi-elemental ratio R(M/L) reveals positive values. In contrast, multi-elemental ratio R(H/M) reveals negative values corresponding to fractionation patterns enriched with medium rare earth elements and heavy rare earth elements depletion across the six mangrove ecosystems. BCF values for rare earth elements were <1, but Lutetium (0.32) had the highest BCF among the rare earth elements, suggesting an efficient accumulation of Lutetium than any other rare earth elements. The scale of Igeo revealed strong contamination (4 ≤ Igeo ≥ 5) of sediment with Lanthanum, Cerium, Praseodynium, Samarium, Godolinium, Holmium, Erbium, Ytterbium, and moderate contamination with Thulium, Terbium, and Dysprosium (1 ≤ Igeo ≤ 3). Principal component analysis showed that clay silt sediment grain size influences rare earth element concentrations in the central Red Sea. Our results provide new evidence for rare earth element fractionation and accumulation in sediment and the potential use of mangrove A. marina for rare earth element monitoring in mangrove ecosystems in the central Red Sea.

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Physico-Chemical Trends in the Sediments of Agbede Wetlands, Nigeria

Materials and Geoenvironment ◽

10.1515/rmzmag-2017-0003 ◽

2017 ◽

Vol 0 (0) ◽

Author(s):

Abdul-Rahman Dirisu ◽

John Ovie Olomukoro ◽

Ifeanyi Maxwell Ezenwa

Keyword(s):

Alkali Metals ◽

Anthropogenic Activities ◽

Sediment Quality ◽

Principal Component ◽

Mean Values ◽

Physico Chemical ◽

Lotic System ◽

The Mean ◽

And Cluster Analysis ◽

Chemical Trends

Abstract This study assessed the physico-chemical status of sediments in the Agbede Wetlands with the aim to create a reference archive for the Edo North catchment and to further identify the characteristics mostly influenced by the natural and anthropogenic activities going on at the watershed. Nutrients, zinc, nickel and lead were identified to be mostly of anthropogenic origin, while alkali metals and alkaline earth metals were from both anthropogenic and natural sources. The clustering of stations 1 and 4 indicates that the sediment quality in the lentic systems was not completely excluded from the lotic system, suggesting that principal component analysis (PCA) and cluster analysis (CA) techniques are invaluable tools for identifying factors influencing the sediment quality. The mean values of the particle size distribution were in the following order across the ecosystems: sand (61.86-80.53%) > silt (9.75-30.34%) > clay (7.83-13.89%). The contamination of the water bodies was primarily derived from agricultural run-offs and through geochemical weathering of the top soils. Therefore, our analysis indicates that the concentrations of cations, anions and nutrients in the sediments of the lotic and lentic ecosystems in Agbede Wetlands are not at an alarming level.

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Storage Property Is Positively Correlated With Antioxidant Capacity in Different Sweet Potato Cultivars

Frontiers in Plant Science ◽

10.3389/fpls.2021.696142 ◽

2021 ◽

Vol 12 ◽

Author(s):

Hui-Hui Song ◽

Zhi-Lin Zhou ◽

Dong-Lan Zhao ◽

Jun Tang ◽

Yan-Hong Li ◽

...

Keyword(s):

Antioxidant Capacity ◽

Antioxidant Enzyme ◽

Sweet Potato ◽

Amylase Activity ◽

Principal Component ◽

Potato Cultivars ◽

Antioxidant Enzyme Activities ◽

Tuberous Roots ◽

Storage Properties ◽

Storage Property

Sweet potato decays easily due to its high respiration rate and reactive oxygen species (ROS) accumulation during postharvest storage. In this study, we explored the relationship between antioxidant capacity in leaves and storage properties in different sweet potato cultivars, the tuberous roots of 10 sweet potato cultivars were used as the experimental materials to analyze the storage property during storage at 11–15°C. According to the decay percentage after 290 days of storage, Xu 32 was defined as a storage-tolerant cultivar (rot percentage less than 25%); Xu 55-2, Z 15-1, Shangshu 19, Yushu, and Zhezi 3 as above-moderate storage-tolerant cultivars (rot percentage ranging from 25 to 50%); Sushu 16, Yanshu 5, and Hanzi as medium-storable cultivars (rot percentage 50–75%); and Yan 25 as a storage-sensitive cultivar (rot percentage greater than 75%). Meanwhile, analysis of the α-amylase activity in root tubers of the 10 sweet potato cultivars during storage indicated that α-amylase activity was lowest in the storage-tolerant cultivar Xu 32 and highest in the storage-sensitive cultivar Yan 25. Evaluation of antioxidant enzyme activities and ROS content in the leaves of these 10 cultivars demonstrated that cultivar Xu 32, which showed the best storage property, had higher antioxidant enzyme activity [superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and peroxidase (POD)] but lower lipoxygenase (LOX) activity, hydrogen peroxide (H2O2) and malondialdehyde (MDA) contents, and superoxide anion radical (O2⋅–) production rates compared with those of the storage-sensitive cultivar Yan 25 and the medium-storability cultivars Hanzi, Yanshu 5, and Sushu 16. Additionally, principal component analysis (PCA) suggested that sweet potato cultivars with different storage properties were clustered separately. Correlation and heat map analysis further indicated that CAT, APX, POD, and SOD activities were negatively correlated with α-amylase activity, while LOX activity and MDA and H2O2 contents were negatively correlated with the storage property of sweet potato. Combined, our findings revealed that storage property is highly correlated with antioxidant capacity in sweet potato leaves and negatively correlated with α-amylase activity in tuberous roots, which provides a convenient means for the screening of storage-tolerant sweet potato cultivars.

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