Yazar "Islam, Abu Reza Md. Towfiqul" seçeneğine göre listele

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    Assessment of the effects of COVID-19 lockdown period on groundwater quality of a significant rice land in an urban area of Turkiye
    (Springer Heidelberg, 2022) Tokatli, Cem; Titiz, Ahmet Mirac; Ugurluoglu, Alper; Islam, Md. Saiful; Ustaoglu, Fikret; Islam, Abu Reza Md. Towfiqul
    In the current research, the impact of the COVID-19 lockdown period on groundwater quality of Lower Meric Plain (Thrace Region of Turkiye) was evaluated. Some significant nutrient characteristics (NO3-, NO2-, and PO43-), salinity characteristics (EC, TDS, and salinity), and physical characteristics (temperature, DO, pH, and turbidity) were investigated in groundwater samples collected from 45 sampling points in pre-lockdown and lockdown periods. Water quality index (WQI) and nutrient pollution index (NPI), Pearson correlation index (PCI), cluster analysis (CA), one-way ANOVA test (OWAT), and factor analysis (FA) were applied to assess ecological risk. Excluding recorded statistical differences in temperature and DO due to climatic conditions (p < 0.05), levels of all the investigated water quality parameters show no statistically significant differences and no significant reduction in pollutants measured in the lockdown period. On the contrary, the WQI and NPI scores have increased between the rates of 4.76-27.10% during the lockdown period. In the lockdown period, although the reduction of industry or limited production of many industrial facilities reduced the inorganic contaminant releases to the environment, ongoing agricultural activities and domestic wastes caused to prevent the reduction of organic pollutants in groundwater of the region during the lockdown period.
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    EPIPHYTIC DIATOMS IN ENVIRONMENTAL BIOINDICATION: A CASE STUDY OF A SIGNIFICANT NATURAL LAKE IN THE NORTHWEST OF TURKEY
    (Wydawnictwo Uniwersytetu Rolniczego Hugona Kollataja Krakowie, 2023) Tokatli, Cem; Solak, Cuneyd Nadir; Islam, Abu Reza Md. Towfiqul; Titiz, Ahmet Mirac; Yilmaz, Elif; Atici, Tahir
    Aim of the study The Gala Lake, which has a status of National Park and is a protected area, is the one of the most important natural stagnant water bodies in the Marmara Region of Turkiye. However, it is under effect of a significant agricultural stress, mainly resulting from paddy cultivation of rice. In this research, epiphytic diatoms of Gala Lake were investigated, and trophic status of the lake was assessed by applying the Biological Diatom Index (BDI). Material and methods Epiphytic diatom samples were collected from the submerged macrophytes from 5 selected locations on the lake (G1-G5) with varying ecological character, and observed to be exposed to different pollution pressures. Results and conclusions As a result of collecting taxonomic data, 37 diatom species were recorded by identifying a total of 2095 valves, and Cyclotella meneghiniana, Bacillaria paxillifera, and Navicula recens were found as the most dominant species for the Gala Lake. According to the results of bioindication data, Gala Lake was found to be in a eutrophic state-having poor water quality in terms of applied BDI.
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    Potentially toxic elements in vegetable and rice species in Bangladesh and their exposure assessment
    (Academic Press Inc Elsevier Science, 2022) Islam, Md. Saiful; Islam, Abu Reza Md. Towfiqul; Phoungthong, Khamphe; Ustaoglu, Fikret; Tokatli, Cem; Ahmed, Ramal; Ibrahim, Khalid A.
    Five different types of vegetable and six rice cultivars were analyzed by inductively coupled plasma mass spectrometer to evaluate the levels of potentially toxic elements (PTEs) and health risk to the adults and children. The mean ranges of Cr, Ni, Cu, Mn, Zn, As, Cd and Pb in samples were 0.85-1.96, 7.56-21.45, 6.94-23.82, 5.7430.87, 4.70-32.76, 0.14-1.05, 0.03-0.25 and 0.50-1.12 mg/kg dw, respectively. The mean concentrations of PTEs in all fresh vegetables and rice samples were higher than the maximum permissible concentrations (MPCs), indicating these foods are contaminated by PTEs and might pose risk to the consumers. Mean removal of Cr, Ni, Cu, Mn, Zn, As, Cd and Pb from rice grains were 34, 31, 37, 34, 38, 59, 37 and 33%, respectively due to the effect of cooking. The THQ values for Ni, Cu, Mn, As and Pb from individual food item were higher than unity, indicating non-carcinogenic risks.
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    Spatial-temporal distributions, probable health risks, and source identification of organic pollutants in surface waters of an extremely hypoxic river basin in Turkiye
    (Springer, 2023) Tokatli, Cem; Islam, Abu Reza Md. Towfiqul
    This study was carried out to determine the spatiotemporal distributions of organic pollution parameters in the Meric-Ergene River Basin subjected to intensive agricultural and industrial pressure. A total of 5 basin components, including Anadere (A), corlu (c), Tunca (T), Meric (M), and Ergene (E) rivers, and 9 stations (A1, c1, T1, M1-M2, and E1-E4) were identified in the watershed, and surface water samples were collected in the dry (end of summer) and wet (end of winter) seasons of 2021-2022. The Water Quality Index (WQI) and Nutrient Pollution Index (NPI) were applied to the data to evaluate the overall water quality characteristics. The Chronic Daily Index (CDI), Hazard Quotient (HQ), and Hazard Index (HI) were applied to the data to reveal the probable noncarcinogenic health risks of organic contaminants. Cluster Analysis (CA) and Principal Component Analysis (PCA) were applied to the data to classify the sampling sites and identify the source apportionment of organic pollution parameters. The recorded spatiotemporal averages of the investigated parameters in the basin are as follows: 6.26 mg/L for DO, 9 for pH, 1626 mu S/cm for EC, 985 mg/L for TDS, 1 parts per thousand for salinity, 6.88 mg/L for nitrate, 0.1 mg/L for nitrite, 1.8 mg/L for phosphate, 81 mg/L for sulfate, and 473 mg/L for chloride. The results indicate that the most contaminated components of the basin are corlu Stream and Ergene River, and in addition to their quite high salt and nutrient content, they have extreme hypoxic conditions to the extent that it is impossible for many aquatic organisms to live. The contamination degrees of the investigated basin components were determined using the organic pollution risk assessment indices as follows: corlu Stream > Ergene River > Anadere Stream > Tunca River > Meric River.