Mangrove ecosystems in Pattani Bay, Thailand are considered representatives for monitoring the occurrence of anthropogenic and natural pollution due to metal and radionuclide contamination. Sediments and seawater were collected from five locations to determine metal (Cd, Cr, Cu, Mn, Ni, Zn, and Pb) and radionuclide (Ra, Th, and K) concentrations. Spatial variations in metal and radionuclide concentrations were determined among the sampling sites. A geoaccumulation index (I ) and enrichment factor (EF) were used to classify the impacts of metals from anthropogenic point sources. Significant values for I and EF were measured for Pb in site 4 (I 0.65; EF 28.2) and Cd in site 1 (I 1.48; EF 46.2). EF values in almost all sampling sites were >1 which indicates anthropogenic pollution. To assess the potential public hazard of radioactivity, the average radium equivalent activity (Ra), the external hazard index (H ), the internal hazard index (H ), the absorbed dose rate in air (D), and the annual effective outdoor dose rate (E) were determined. Based on these measurements, it is concluded that the probability of human health risk from radionuclides is low. However, the absorbed dose in air (D) values in sites 4 and 5 were greater than the global average value of 55 nGy h, indicating that sediments in these locations pose a radiological hazard. The data obtained in this study provides useful information on metal and radionuclide background levels in mangrove sediments and seawater, and can be applied toward human health risk assessment and metal and radionuclide mapping.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s11356-016-8266-9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A trial of radiolabeled antibody yttrium-90-FF-21101 for the treatment of advanced ovarian and other cancers.
Cancer
January 2025
Stephenson Cancer Center, University of Oklahoma Health Sciences Center/Sarah Cannon Research Institute, Oklahoma City, Oklahoma, USA.
Background: Yttrium-90 FF-21101 (Y-FF-21101) is a radiopharmaceutical that targets P-cadherin as a therapy against solid tumors. A previously reported, first-in-human study determined that a dose of 25 mCi/m was safe, and a patient with clear cell carcinoma of the ovary achieved a complete response. In this article, the authors report the results of Y-FF-21101 treatment in an ovarian carcinoma expansion cohort and in patients with selected solid tumors who had known high P-cadherin expression.
View Article and Find Full Text PDFImply on diagnosis and early prognosis of preoperative [Ga]Ga-PSMA-11 PET/CT in patients with suspected brain tumours of glial origin.
Sci Rep
January 2025
Nuclear Medicine Department, Medical University of Warsaw, Banacha 1a, 02-097, Warsaw, Poland.
PET/CT targeting prostate-specific membrane antigen (PSMA) is commonly used in patients with prostate cancer. PSMA has been found in other solid tumours, including primary brain tumours. The aim of this study was to evaluate the usefulness of [Ga]Ga-PSMA-11 PET/CT for preoperative diagnosis and 2-year prognosis.
View Article and Find Full Text PDFChemical insight into pros and cons of coffees from different regions.
Sci Rep
January 2025
Faculty of Chemistry, Department of Analytical Chemistry, Gdańsk University of Technology, Gabriela Narutowicza 11/12 Str., 80-233, Gdańsk, Poland.
The main aim of this work was to study the chemical composition of eighteen ground coffees from different countries and continents with regard to the content of hazardous substances as radioactive elements (K, Ra, Ra, U, U and Cs), metals, including heavy metals, aluminum and some microelements (V, Cr, Mn, Fe, Co, Ni, Cu, Zn) as well as substances that have a positive effect on human health and well-being (polyphenols, proteins, fats and caffeine). The tests were carried out before and after the brewing process using the following techniques: gamma and beta spectrometry, a microwave-induced plasma optical emission spectrometer (MIP-OES), gravimetric method, UV-Vis spectrophotometry as well as thin-layer chromatography. The leaching percentage of certain elements/compounds in coffee infusions was also measured.
View Article and Find Full Text PDFLesion Volume Divided by ADC Measures Is an Independent Prognostic Marker in Colorectal Liver Metastasis Treated by Y90-radioembolization.
In Vivo
December 2024
Department of Radiology and Nuclear Medicine, University Hospital Magdeburg, University of Magdeburg, Magdeburg, Germany.
Background/aim: To assess the ability of apparent diffusion coefficient (ADC) at baseline in predicting overall survival in patients who undergo Y90-radioembolization (Y90-RE) for liver-dominant metastatic colorectal cancer (mCRC) in the salvage situation.
Patients And Methods: A retrospective review of 411 lesions in 63 patients with refractory mCRC treated with Y90-RE was conducted. Manual region of interest (ROI) measurements were applied using a whole lesion and volume method.
Preconcentration of bismuth using nickel hydroxide nanoflower from water samples and determination by FAAS.
Environ Monit Assess
December 2024
Chemistry Department, Faculty of Art and Science, Yıldız Technical University, 34220, Istanbul, Türkiye.
In this study, a preconcentration strategy based on Ni(OH) nanoflowers (NFs) was developed for the extraction/separation of bismuth ions from environmental water samples before the determination by flame atomic absorption spectrometry (FAAS). The homogeneous coprecipitation method was employed for the synthesis of the flower-shaped Ni(OH) and used as an adsorbent for the preconcentration of bismuth. The extraction variables were determined by a univariate optimization strategy to obtain maximum extraction performance.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!