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61,005 resultsShowing papers similar to The Pollution Characteristics of Harmful Heavy Metal in Surface Sediment of Sepang River, Malaysia
ClearAssessment of heavy metal distribution, contamination, and ecological risk in mangrove sediments of the Nabq Protectorate, Gulf of Aqaba
This study analyzed the distribution of six heavy metals (Cu, Fe, Cd, Pb, Zn, and Mn) in mangrove sediments at Nabq Protectorate in the Gulf of Aqaba, finding that concentrations were generally below contamination thresholds compared to crustal averages. Iron showed the highest concentrations, while the area was assessed as largely uncontaminated relative to reference standards.
Distribution of Heavy Metals in Sediments and Soft Tissues of the Cerithidea obtusa from Sepang River, Malaysia
Heavy metal concentrations were measured in the tissues, shells, and surface sediments associated with the mangrove snail Cerithidea obtusa from a Malaysian river estuary. Iron was the dominant metal across all compartments, and soft tissues accumulated metals differently from shells. The study contributes to understanding how estuarine organisms accumulate metals from contaminated sediments.
Spatial Distribution and Risk Assessment of Heavy Metals in Sediments of the Mangrove Ecosystem in Ras Mohammed Protectorate, Gulf of Aqaba, Red Sea
Researchers measured heavy metal concentrations (including lead, cadmium, copper, and zinc) in mangrove sediments of Ras Mohammed Protectorate in the Gulf of Aqaba, Red Sea, and assessed ecological risks. The spatial distribution showed variation across sites, with some metals elevated above background levels in areas closer to human activities.
The Ecological-Health Risks of Potentially Toxic Metals in the Surface Sediments and Leaves of Salt-Secreting Avicennia officinalis as Potential Phytoremediators: A Field-Based Biomonitoring Study from Klang Mangrove Area
Surface sediments in the Klang mangrove ecosystem were analyzed for potentially toxic metals, revealing elevated concentrations of lead, cadmium, and zinc that pose ecological and human health risks. Avicennia officinalis was assessed for phytoremediation potential, showing uptake of certain metals from contaminated sediments.
Past Metal(loid) Pollution Records Inferred fromthe Sediments of Bukit Merah Reservoir Perak,Malaysia
This study reconstructed historical metal pollution in Bukit Merah Reservoir in Malaysia by analyzing sediment cores for metal distribution and geochemical indicators, finding evidence of elevated pollution from tin mining and agricultural activities that began in the 1980s and persists in deeper sediment layers.
Assessment of Heavy Metal Contamination in Beach Sediments of Eastern St. Martin’s Island, Bangladesh: Implications for Environmental and Human Health Risks
Researchers measured heavy metal levels in beach sediments on St. Martin's Island, Bangladesh, and assessed the ecological and human health risks. While most metals were within acceptable ranges, some locations showed elevated levels of manganese and iron linked to human activities like tourism and fishing. Though focused on heavy metals, the study's methods for assessing coastal contamination are applicable to microplastic pollution monitoring in similar beach environments.
Characterization and ecological risk assessment of toxic metals in mangrove sediments near Langen Village in Tieshan Bay of Beibu Gulf, China
Researchers assessed toxic metal contamination in mangrove sediments near Langen Village in Tieshan Bay, China, following recent coastal development. The study investigated the distribution patterns, ecological risks, and potential sources of seven toxic metals in the intertidal zone, providing insight into how reclamation activities affect pollution levels in shallow mangrove ecosystems.
Seasonal variation and mobility of trace metals in the beach sediments of NW Borneo
Researchers analyzed trace metal speciation in coastal sediments of NW Borneo using sequential extraction and found that copper and zinc — predominantly in bioavailable exchangeable fractions — pose significant contamination risks to aquatic organisms, coral reefs, and mangroves, driven by river inputs and monsoonal sediment dynamics.
Microplastics and accumulated heavy metals in restored mangrove wetland surface sediments at Jinjiang Estuary (Fujian, China)
Microplastics in restored mangrove wetland sediments in China were found in higher concentrations than in adjacent mudflats, suggesting that mangrove restoration itself may promote plastic accumulation. Surface analysis of microplastics revealed the presence of toxic metals including chromium, zinc, lead, and cadmium, indicating plastics as a carrier for these pollutants.
Study of Heavy Metals and Microbial Communities in Contaminated Sediments Along an Urban Estuary
Researchers studied heavy metal contamination and microbial community composition in estuarine sediments along an urban waterway, finding that urbanization-driven metal accumulation significantly altered microbial diversity and community structure.
Spatial Distributions and Intrinsic Influence Analysis of Cr, Ni, Cu, Zn, As, Cd and Pb in Sediments from the Wuliangsuhai Wetland, China
Researchers mapped heavy metal concentrations in sediments of the Wuliangsuhai wetland in China, finding arsenic and cadmium levels six- and seven-fold above background values respectively, largely from irrigation water inputs. High bioavailable fractions of cadmium, lead, and zinc raised concerns about ecological and human health risks in this agriculturally managed wetland.
[Occurrence Characteristics of Microplastics in Mangrove Sediments in the Jiulong River Estuary and the Association with Heavy Metals].
Researchers measured microplastic abundance and types in mangrove wetland sediments at the Jiulong River estuary in China, also examining associations with heavy metals. The findings show that mangrove sediments accumulate both microplastics and metals, raising concerns for the health of these coastal ecosystems.
Preliminary Determination of Heavy Metals in Sediment, Water, and Some Macroinvertebrates in Tawi-Tawi Bay, Philippines
Researchers conducted a preliminary assessment of heavy metal concentrations in sediment, water, and macroinvertebrates at multiple sites in Tawi-Tawi Bay in the Philippines. The study establishes baseline data on chemical pollution in this understudied coastal area.
Abundance and distribution of microplastics in tropical estuarine mangrove areas around Penang, Malaysia
This study documented microplastic pollution in tropical mangrove estuaries around Penang, Malaysia, finding thousands of plastic particles in both water and sediment samples. Concentrations were particularly high near the more urbanized Seberang Perai area, where sediment contained up to 4,000 particles per kilogram. The research highlights that tropical mangroves, which serve as important nursery habitats for marine life, are accumulating significant amounts of microplastic pollution.
Contamination in mangrove ecosystems: A synthesis of literature reviews across multiple contaminant categories
This review synthesizes research on five classes of contaminants in mangrove ecosystems, including microplastics, heavy metals, and organic pollutants. Microplastic levels in mangroves varied widely and lack established safety thresholds, while other pollutants were sometimes found at levels harmful to wildlife. Since mangrove ecosystems support fisheries and coastal communities, contamination of these environments could affect human food sources and livelihoods.
Assessment of Heavy Metal Contamination and Pollution Indices in Avicennia marina of Nabq Mangrove Forest, the Red Sea, Egypt
Not relevant to microplastics — this study assesses heavy metal concentrations (including copper, zinc, and lead) in the tissues of mangrove trees in an Egyptian Red Sea nature reserve to evaluate contamination from urbanization and industry.
Contamination, Toxicity and Ecological Risk Assessment of Heavy Metals in Surface Sediments of Coastal Areas of Bushehr Province: A Systematic Review Study
This systematic review of studies from 2012-2020 found that coastal surface sediments in Bushehr Province, Iran, contain heavy metals at levels posing moderate to high ecological risk, with nickel, chromium, and cadmium identified as the primary contaminants from petrochemical and industrial sources. The pollution levels exceeded safe thresholds in several coastal areas. Coastal sediment contamination with heavy metals often co-occurs with microplastic pollution, and microplastics can adsorb and concentrate these toxic metals, potentially increasing their bioavailability to marine organisms.
Revealing Microplastic Contamination in Mangrove Sediments from Setiu Wetlands, Malaysia
Researchers found 2,292 microplastic particles per kilogram of sediment in the mangrove wetlands of Setiu, Malaysia, with over 80% being tiny fibers likely from fishing gear and packaging. Areas near aquaculture operations had the highest contamination levels, and the microplastic surfaces showed signs of environmental degradation that could make them more toxic. Mangrove ecosystems act as natural traps for microplastics, concentrating pollution in habitats that are vital for fisheries and coastal protection.
Identification, Abundance, and Chemical Characterization of Macro-, Meso-, and Microplastics in the Intertidal Zone Sediments of Two Selected Beaches in Sabah, Malaysia
Researchers identified and characterized macro-, meso-, and microplastics in intertidal sediments of two beaches in Sabah, Malaysia, finding significant plastic contamination with heavy metal associations that pose potential ecological risks to coastal environments.
Ecological-Health Risk Assessments of Heavy Metals (Cu, Pb, and Zn) in Aquatic Sediments from the ASEAN-5 Emerging Developing Countries: A Review and Synthesis
This review compiled copper, lead, and zinc concentrations in aquatic sediments across five ASEAN countries from 1981 to 2021, finding elevated heavy metal levels at sites with high human activity and assessing ecological and health risks from sediment contamination.
Characteristics and distribution of microplastics in the coastal mangrove sediments of China
A survey of mangrove sediments along China's coast found microplastics were ubiquitous, with concentrations and polymer types varying by proximity to human activity and hydrological conditions. The study shows that mangrove forests, which provide critical coastal ecosystem services, are accumulating significant quantities of plastic pollution.
Heavy Metals and their Effects on Macroinvertebrates Present in the Ojo River, Lagos, Nigeria
Researchers investigated heavy metal concentrations in the tissues of crab, prawn, and crayfish from the Ojo River in Lagos, Nigeria, assessing contamination levels in commercially harvested crustaceans and their implications for human health and aquatic ecosystem integrity.
Assessment of Heavy Metal Contamination in Shrimp and Water from the Great Kwa River: Implications for Human Health and Aquatic Ecosystems
Researchers measured heavy metal concentrations in shrimp and water samples from Nigeria's Great Kwa River. The study found elevated levels of several toxic metals linked to oil exploration and industrial activities, with some metals in shrimp tissue exceeding safe consumption limits, raising concerns about health risks for local communities who rely on river shellfish as a food source.
Contaminant Characteristics and Influencing Factors of Heavy Metals in Seawater and Sediments in a Typical Mariculture Bay in South China
Researchers assessed heavy metal contamination in seawater and sediments of Qinzhou Bay, a major mariculture area in South China, finding seasonal variations in metal concentrations influenced by river input, aquaculture activities, and hydrodynamic conditions.