Lateral distribution, environmental occurrence, and assessment of organic pollutants in surface sediments of the East Malaysia

Alkhadher, Sadeq Abdullah Abdo; Suratman, Suhaimi; Zakaria, Mohamad Pauzi

doi:10.1007/s10661-023-11310-w

Cited by 7 publications

(4 citation statements)

References 46 publications

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“…This enhances their sorption and partitioning into sediment matrices, making them more likely to be retained in the sediments over time. LC-LABs also might undergo slower degradation or transformation processes due to their larger size and more complex structure [53,54]. The PDC sediments contained the highest concentration of C 13 -LABs homologs while having the lowest levels of C 10 homologs when compared with all other sites in the region.…”

Section: Differences In the Distribution Of Labs Concentrationsmentioning

confidence: 99%

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Assessment of Sewage Molecular Markers: Linear Alkylbenzenes in Sediments of an Industrialized Region in Peninsular Malaysia

Alkhadher,

Al-Hazmi,

Suratman

et al. 2023

Water

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In this study, the use of linear alkylbenzenes (LABs) was employed to pinpoint the sources of human activity that cause detrimental impacts on the coastal environment and river ecosystems. LABs were detected using GC–MS in sediment samples assembled from Kim Kim River (KKR) and the Port Dickson coast (PDC). To assess the significance of variations in the distribution and concentrations of LABs across the sampling sites, this study utilized several statistical techniques such as post hoc tests, LSD techniques, analysis of variance (ANOVA), and the Pearson correlation coefficient using a significance level of p < 0.05. The degradation levels of LABs and wastewater treatment were assessed in the study using internal congeners (I/E), homologs of C13 and C12, and long-to-short-chain (L/S) ratios. The results revealed that the LAB concentrations varied between 88.3 and 112 ng/g dw in KKR and 119 to 256 ng/g dw in the PDC. Most of the surveyed areas exhibited a substantial count of C13–LABs homologs that displayed a significant difference (p < 0.05). The I/E ratios ranged from 1.7 to 2.0 in KKR and from 2.0 to 4.1 in the PDC, suggesting that the effluents originated from sources associated with the physical phase and biological phase in wastewater treatment systems (WWTSs). The results revealed that the degradation of LABs varied between 34% and 38% in KKR and between 40% and 64% in the PDC. This study underscores the importance of ongoing improvements to WWTSs and emphasizes the potential of LABs as indicators for monitoring wastewater contamination.

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Section: Differences In the Distribution Of Labs Concentrationsmentioning

confidence: 99%

Section: Differences In the Distribution Of Labs Concentrationsmentioning

confidence: 99%

Assessment of Sewage Molecular Markers: Linear Alkylbenzenes in Sediments of an Industrialized Region in Peninsular Malaysia

Alkhadher,

Al-Hazmi,

Suratman

et al. 2023

Water

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“…An essential component of these hazards stemming from the widespread use of detergents and surfactants in daily living, agriculture and industries during the past few years is the pollution of coastal and riverine ecosystems. In spite of Malaysia's growing urbanization and industry, the country's sanitary sewer systems, even those in populated and developed areas, are of low quality [19][20][21]. It is crucial to monitor the ecosystems of various rivers and estuaries that receive land-based contaminants, such as industrial and municipal wastewater.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the abundance of urbanized growth and wastewater treatment plants (WWTPs) on Malaysia's western coast, residential waste is increasingly brought from point sources such as factories and non-point sources such as discharge from different sources. Due to less growth on Malaysia's eastern coast, the majority of the country's pollution originates in urban and industrial areas [21,30]. Higher health risks to people and the ecosystem would result from increased inputs of untreated wastewater into river and coastal ecosystems, particularly in slum regions, locations that are overcrowded, constrained, or without wastewater treatment systems.…”

Section: Introductionmentioning

confidence: 99%

Unlocking the Secrets of River Pollution: Analyzing Organic Pollutants in Sediments—Experimental Study

Alkhadher

Suratman

Al‐Hazmi

et al. 2023

Water

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Untreated wastewater released into rivers can result in water pollution, the spread of waterborne diseases, harm to ecosystems, contamination of soil and groundwater, as well as air pollution and respiratory problems for nearby humans and animals due to the release of greenhouse gases. The current study aims to investigate the recent input of anthropogenic loads into the rivers using linear alkylbenzene (LAB), which is one of the molecular chemical markers with application of sophisticated model statistical analyses. In order to determine the compositions of LABs, which act as wastewater pollution molecular indicators, surface sediment samples from the Muar and Kim Kim rivers were collected. Gas chromatography-mass spectrometry (GC-MS) was utilized to identify LABs and investigate their sources and degradation. ANOVA and the Pearson correlation coefficient were employed to determine the significance of differences between sampling locations, with a threshold of p < 0.05. To assess the degradation degree and efficacy of wastewater treatment plants (WWTPs), LABs were identified based on chains ranging from long to short (L/S), C13/C12 homolog, and internal to external (I/E) congeners. The results indicated that LAB concentrations in the studied areas of the Muar River ranged from 87.4 to 188.1 ng g−1dw. There were significant differences in LAB homology at p < 0.05, and a significant percentage of sampling stations contained C13-LAB homology. Based on the LAB ratios (I/E) determined, which ranged from 1.7 to 2.2 in the studied areas, it was concluded that effluents from primary and secondary sources are being discharged into the marine ecosystem in those areas. The degradation of LABs was up to 43% in the interrogated locations. It can be inferred that there is a requirement for enhancing the WWTPs, while also acknowledging the efficacy of LAB molecular markers in identifying anthropogenic wastewater contamination.

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Seasonal variations in the distribution of aliphatic hydrocarbons in surface sediments from the Selangor River, Peninsular Malaysia's West Coast

Magam,

Masood,

Alkhadher

et al. 2024

Environ Geochem Health

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Lateral distribution, environmental occurrence, and assessment of organic pollutants in surface sediments of the East Malaysia

Cited by 7 publications

References 46 publications

Assessment of Sewage Molecular Markers: Linear Alkylbenzenes in Sediments of an Industrialized Region in Peninsular Malaysia

Assessment of Sewage Molecular Markers: Linear Alkylbenzenes in Sediments of an Industrialized Region in Peninsular Malaysia

Unlocking the Secrets of River Pollution: Analyzing Organic Pollutants in Sediments—Experimental Study

Seasonal variations in the distribution of aliphatic hydrocarbons in surface sediments from the Selangor River, Peninsular Malaysia's West Coast

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