Spatial variation of trace element concentration and contamination assessment in the coral reef sediments of Lakshadweep Archipelago, Indian Ocean

Joy, Anu; Anoop, P.P.; Rajesh, R.; Mathew, Jose; Mathew, Angel; Gopinath, Anu

doi:10.1016/j.marpolbul.2019.06.003

Cited by 22 publications

(2 citation statements)

References 20 publications

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“…The geo-accumulation index (Igeo), which was first proposed by Muller [ 37 ], is a quantitative index to study PTEs pollution in sediments. It is widely used to study the contamination of PTEs pollution in modern sediments [ 38 , 39 , 40 ]. To characterise the level of contamination within the sediment, Igeo values were measured using the formula given below:

where C x is the measured concentration of metal element x in the samples; B x is the reference or background value of element x ( Table 1 .…”

Section: Methodsmentioning

confidence: 99%

Effects of Human Activities on the Spatial Distribution, Ecological Risk and Sources of PTEs in Coastal Sediments

Wang

Lin

Wang

et al. 2021

IJERPH

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Potentially toxic elements (PTEs) have attracted substantial attention because of their widespread sources, long residue time and easy accumulation. PTEs in the surface sediments of inshore waters are strongly affected by human activities because these waters are a zone of interaction between the ocean and land. In the present study, to explore the environmental geochemical behaviour and source of PTEs in the surface sediments of coastal waters, the contents and spatial distributions of copper (Cu), lead (Pb), zinc (Zn), cadmium (Cd), chromium (Cr), mercury (Hg) and arsenic (As) in different regions of Xiamen Bay were investigated. The data were processed by multivariate statistical methods, and the distribution characteristics of PTEs in the surface sediments of Xiamen Bay were analysed. In addition, the pollution load index (PLI), geo-accumulation index (Igeo) and potential ecological index(RI) were used to evaluate the pollution degree and potential risk in the surface sediments of Xiamen Bay, and the positive matrix factorisation (PMF) model was used to analyse the source. The results show that Zn had the highest mean concentration, followed by Pb, Cr, Cu, As, Cd and Hg, among the seven PTEs. The mean contents of Pb, Zn, Cd, Cu and Hg, and especially Hg and Cd, were higher than the corresponding environmental background values. The average PLI value indicated that the Xiamen Bay sediment was moderately contaminated by PTEs. The Igeo results showed that Xiamen Bay was moderately to strongly polluted by Cd and Hg. The proportions of samples with low, medium and strong risk levels were 11.63%, 74.42%, and 13.95% in surface sediments, respectively. PMF models showed that the input of chemical fertilizer and medication, anthropogenic atmospheric components and terrestrial detritus were the main sources of PTEs in the surface sediment of Xiamen Bay.

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where C x is the measured concentration of metal element x in the samples; B x is the reference or background value of element x ( Table 1 .…”

Section: Methodsmentioning

confidence: 99%

Effects of Human Activities on the Spatial Distribution, Ecological Risk and Sources of PTEs in Coastal Sediments

Wang

Lin

Wang

et al. 2021

IJERPH

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“…To better conserve wetlands, they recommend public fora with representatives from education, research, and NGOs as well as locals [47]. Working in the Lakshadweep Archipelago, Joy et al revealed contamination attributed to "anthropogenic pressure and developmental activities" including "diesel-based power generation, shipping activities, sewage sludge, plastic materials, fertilizers, construction, tourism activities, petroleum products, paints and pigments used in plastics, garbage and phosphate fertilizers" and noticed cadmium seriously threatens this reef ecosystem [48].…”

Section: Literature Reviewmentioning

confidence: 99%

Empowering Local Practitioners to Collect and Report on Anthropogenic Riverine and Marine Debris Using Inexpensive Methods in India

et al. 2022

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This article includes a review of the literature on marine debris in an Indian context and introduces a replicable, scientific, and inexpensive collection method to build capacity and inform policymakers. We share baseline data resulting from ten cleanups using these methods in India. This method was introduced in a 2019 workshop to train Indian researchers, leading to local-led collections in three states and two Union Territories (8 beaches, 2 riversides) yielding 33,474 individual pieces of debris weighing a total of 599.15 kg. Plastic was the most frequently found material at all ten collection sites, comprising from 45% to 89% of all items found. The research establishes a baseline data collection at ten locations, with debris density at sites ranging from 0.38–3.86 items/m2. Application of the Clean Coast Index yields resulting rankings of moderate (1 site), dirty (2 sites), and extremely dirty (7 sites). Researchers also identified 2461 brands in analysis at six sites, 76% of which were Indian in origin. Replication of the methods in other Indian regions among the community of thirty-three practitioners was below target for collection (41%) and brand audit (8.3%) with 25% of teams sharing data with the community of practitioners and 12.5% sharing results with local policymakers. The analysis indicates debris is overwhelmingly composed of plastic from residential activities. The methods empower practitioners to collect and report on debris, ground-truthing global debris estimates, and illuminating the missing plastic problem.

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Spatial Distribution and Radiological Risk Quantification of Natural Radioisotopes in the St. Martin’s Island, Bangladesh

Khan

Haydar

Saha

et al. 2022

Environmental Science and Engineering

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Spatial variation of trace element concentration and contamination assessment in the coral reef sediments of Lakshadweep Archipelago, Indian Ocean

Cited by 22 publications

References 20 publications

Effects of Human Activities on the Spatial Distribution, Ecological Risk and Sources of PTEs in Coastal Sediments

Effects of Human Activities on the Spatial Distribution, Ecological Risk and Sources of PTEs in Coastal Sediments

Empowering Local Practitioners to Collect and Report on Anthropogenic Riverine and Marine Debris Using Inexpensive Methods in India

Spatial Distribution and Radiological Risk Quantification of Natural Radioisotopes in the St. Martin’s Island, Bangladesh

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