Abstract:The implementation of natural parks in cities is a current and controversial theme. Therefore, in Lake Buritis, which is a leisure area for the population of the city of Goiatuba, Goiás, Brazil, the quality of the water was analyzed, carrying out quantitative tests of the water samples at six different points between the source and the outlet of the lake that flows into the stream, Chico À Toa. Physical–chemical tests (turbidity, pH, alkalinity, electrical conductivity, color, nitrate and hardness parameters),… Show more
“…Nitrate is among the parameters that contributed to the decrease in the indices (Table 3; Figure 4). A similar finding is also reported by Kikuda et al [41], who studied Buritis Lake (Brazil). Even a slight decrease in nitrogen contents in Lake Union improves lake trophic status, but adding nutrients to the lake promotes eutrophication.…”
Water quality indices (WQIs) are practical and versatile instruments for assessing, organizing, and disseminating information about the overall quality status of surface water bodies. The use of these indices may be beneficial in evaluating aquatic system water quality. The CCME (Canadian Council of Ministers of the Environment) and NSF (National Science Foundation) WQIs were used for the assessment of surface water (depth = 1 m) in Lake Union, Washington State. These WQIs were used in surface water at Lake Union, Seattle. The modified versions of the applied WQIs incorporate a varied number of the investigated parameters. The two WQIs were implemented utilizing specialized, publicly accessible software tools. A comparison of their performance is offered, along with a qualitative assessment of their appropriateness for describing the quality of a surface water body. Practical conclusions were generated and addressed based on the applicability and disadvantages of the evaluated indexes. When compared to the CCME-WQI, it is found that the NSF-WQI is a more robust index that yields a categorization stricter than CCME-WQI.
“…Nitrate is among the parameters that contributed to the decrease in the indices (Table 3; Figure 4). A similar finding is also reported by Kikuda et al [41], who studied Buritis Lake (Brazil). Even a slight decrease in nitrogen contents in Lake Union improves lake trophic status, but adding nutrients to the lake promotes eutrophication.…”
Water quality indices (WQIs) are practical and versatile instruments for assessing, organizing, and disseminating information about the overall quality status of surface water bodies. The use of these indices may be beneficial in evaluating aquatic system water quality. The CCME (Canadian Council of Ministers of the Environment) and NSF (National Science Foundation) WQIs were used for the assessment of surface water (depth = 1 m) in Lake Union, Washington State. These WQIs were used in surface water at Lake Union, Seattle. The modified versions of the applied WQIs incorporate a varied number of the investigated parameters. The two WQIs were implemented utilizing specialized, publicly accessible software tools. A comparison of their performance is offered, along with a qualitative assessment of their appropriateness for describing the quality of a surface water body. Practical conclusions were generated and addressed based on the applicability and disadvantages of the evaluated indexes. When compared to the CCME-WQI, it is found that the NSF-WQI is a more robust index that yields a categorization stricter than CCME-WQI.
“…Likewise, Macar et al 36 determined that Co(NO 3 ) 2 stress reduced MI and showed a cytotoxic effect in A. cepa . Kikuda et al 37 reported significant changes in MI rates of A. cepa germinated with lithium-containing Buritis Lake water. Figure 3 Effects of Li 2 CO 3 application on dividing cell number and MI in meristematic cells.…”
Section: Resultsmentioning
confidence: 99%
“…Liu et al 39 showed that different metal ions can cause varying degrees of nucleus, nucleolus and chromosome irregularities in A. cepa . It has been reported in the literature that DNA integrity changes and chromosomal damage occur in A. cepa germinating with water samples containing lithium 37 .…”
The increasing widespread use of lithium, which is preferred as an energy source in batteries produced for electric vehicles and in many electronic vehicles such as computers and mobile phones, has made it an important environmental pollutant. In this study, the toxicity profile of lithium carbonate (Li2CO3) was investigated with the Allium test, which is a bio-indicator test. Dose-related toxic effects were investigated using Li2CO3 at doses of 25 mg/L, 50 mg/L, and 100 mg/L. The toxicity profile was determined by examining physiological, cytotoxic, genotoxic, biochemical and anatomical effects. Physiological effects of Li2CO3 were determined by root length, injury rate, germination percentage and weight gain while cytotoxic effects were determined by mitotic index (MI) ratio and genotoxic effects were determined by micronucleus (MN) and chromosomal aberrations (CAs). The effect of Li2CO3 on antioxidant and oxidant dynamics was determined by examining glutathione (GSH), malondialdehyde (MDA), catalase (CAT) and superoxide dismutase (SOD) levels, and anatomical changes were investigated in the sections of root meristematic tissues. As a result, Li2CO3 exhibited a dose-dependent regression in germination-related parameters. This regression is directly related to the MI and 100 mg/L Li2CO3 reduced MI by 38% compared to the control group. MN and CAs were observed at high rates in the groups treated with Li2CO3. Fragments were found with the highest rate among CAs. Other damages were bridge, unequal distribution of chromatin, sticky chromosome, vagrant chromosome, irregular mitosis, reverse polarization and multipolar anaphase. The genotoxic effects were associated with Li2CO3-DNA interactions determined by molecular docking. The toxic effects of Li2CO3 are directly related to the deterioration of the antioxidant/oxidant balance in the cells. While MDA, an indicator of lipid peroxidation, increased by 59.1% in the group administered 100 mg/L Li2CO3, GSH, which has an important role in cell defense, decreased by 60.8%. Significant changes were also detected in the activities of SOD and CAT, two important enzymes in antioxidant defense, compared to the control. These toxic effects, which developed in the cells belonging to the lithium-treated groups, were also reflected in the tissue anatomy, and anatomical changes such as epidermis cell damage, cortex cell damage, flattened cell nucleus, thickening of the cortex cell wall and unclear vascular tissue were observed in the anatomical sections. The frequency of these changes also increased depending on the Li2CO3 dose. As a result, Li2CO3, which is one of the lithium compounds, and has become an important contaminant in the environment with increasing technological developments, caused a combined and versatile toxicity in Allium cepa L. meristematic cells, especially by causing deterioration in antioxidant/oxidant dynamics.
“…In recent years, in many areas around the world, the transport of pollutants through the vertical connectivity between surface water and aquifers as a consequence of human activities has become a critical issue. This is due to the increase in population, industry, agriculture, and livestock [1][2][3]. Indeed, some phenomena serve as continuous warnings about the deterioration resulting from the improper use of water and other natural resources, although certain issues may necessitate more in-depth investigation for their detection.…”
In this research, a hydraulic characterization of a 14 km segment of the San Pedro River, flowing through the center of the Aguascalientes Valley, was conducted. More than 50 years of flow measurement records were processed to obtain daily flows during dry and rainy seasons. Through geospatial analysis, areas with hydraulic retention, influenced by the region’s topography and sediment accumulation during the flood season, were identified. Similarly, the digital map of geological surface features revealed that some of these structures spatially coincide with these retention areas. Later, potential hydraulic connectivity between the surface and the aquifer were evaluated in the identified hydraulic stagnation areas (HSAs) using vertical electrical soundings (VESs). Finally, through an experimental process in which water collected from the San Pedro River flowed through a device filled with surface soil taken from the retention areas, the potential retention of pollutants by the local soil was evaluated based on toxicity tests using the monogonont rotifer Lecane papuana. The findings suggest the presence of three hydraulic stagnation areas (HSAs) in the examined section of the river, with one of them intersected by a surface discontinuity. According to the results of the VES, the water table beneath the HSA varies between 70 and 90 m in depth. Further analysis of the vertical electrical sounding (VES) results suggests the presence of vertical hydraulic connectivity between the San Pedro River and the local aquifer in the hydraulic stagnation areas (HSA). This is indicated by the identification of low-resistivity strata associated with highly saturated soil above the water table, as measured in the adjacent pumping wells. Additionally, the experiments involving the device filled with soil showed a reduction in water toxicity (ranging from 12 to 40%) as the San Pedro River water flowed through a 1 m column of local near-surface soil. The results of this experimental work suggest that the soil acts as a natural filter for contaminant transport under conditions in time and space similar to those of the experiment. However, there is still a significant research niche in conducting an experimental campaign in terms of hydrogeochemistry to obtain more specific results.
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