Adsorption of cobalt by using inorganic components of sediment samples from water bodies

2020 ◽  
Author(s):  
Rocío Montes de Oca-Palma ◽  
Marcos Solache-Ríos ◽  
Melania Jiménez-Reyes ◽  
José Juan García-Sánchez ◽  
Perla Tatiana Almazán-Sánchez
Keyword(s):  
Water Bodies ◽  
Sediment Samples ◽  
Inorganic Components

scholarly journals The Study of Phosphate Release from Artificial Sediment into Water Body Using Diffusive Gradient in Thin Film (DGT) Device in Oxic Condition

2020 ◽  
Vol 20 (2) ◽  
pp. 395
Author(s):  
Ardina Purnama Tirta ◽  
Asep Saefumillah ◽  
Foliatini Foliatini ◽  
Herawati Herawati
Keyword(s):  
Thin Film ◽  
Phosphate Concentration ◽  
Water Bodies ◽  
Biogeochemical Processes ◽  
Oxic Condition ◽  
Phosphate Release ◽  
Artificial Sediment ◽  
Sediment Samples ◽  
Sediment Sampling ◽  
Phosphate Analysis

The phenomenon of phosphate release in sediments into water bodies under oxic environment has been investigated using the Diffusive Gradient in Thin Film (DGT) technique. This research consists of several stages: polymer synthesis and DGT probe assembly, sediment sampling, DGT deployment in oxic conditions, and phosphate analysis from DGT adsorption results. Acrylamide polymer was successfully synthesized with a composition 15% acrylamide; N-N'-methylenebisacrylamide 0.1% and ferrihydrite as binding gels. DGT probes were assembly by placing a 16 x 3.2 cm polyacrylamide gel, binding gels and filter membranes on the DGT probes. The sediment sample was taken from the Bogor Botanical Gardens at the coordinates 6°36’00.6” S; 106°47’51.0” E. The DGT probe was placed in sediment samples for 1, 3 and 7 days in oxic conditions. After the prescribed time, the binding gel was removed and cut every 1 cm depth, then eluted using 0.25 M H2SO4 and the phosphate concentration was measured using spectrophotometry method. The results showed that the phosphate concentration tends to be higher with the increasing incubation time and depth. Maximum CDGT phosphate released on day 1, day 3 and day 7 were 1.00 µg/L at a depth of 14 cm, 6.61 µg/L at a depth of 14 cm, and 20.92 µg/L at a depth of 11 cm respectively. This ensures that the phosphate in water bodies comes from biogeochemical processes that occur in sediments and is successfully measured through DGT techniques.

scholarly journals Cryptosporidium Contamination and Attributed Risks in Yunlong Lake in Xuzhou, China

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Yadong Kong ◽  
Ping Lu ◽  
Tao Yuan ◽  
Jinghui Niu ◽  
Zhaoji Li ◽  
...  
Keyword(s):  
Water Samples ◽  
Environmental Protection Agency ◽  
Protozoan Parasite ◽  
The United States ◽  
Water Bodies ◽  
Risk Level ◽  
Sediment Samples ◽  
Risk Period ◽  
Substantial Risk ◽  
One Year

Swimming in surface water bodies (e.g., lakes, rivers) can expose the human body to substantial risk of infection by Cryptosporidium. These findings are from a one-year investigation on the occurrence and distribution of the protozoan parasite Cryptosporidium in Yunlong Lake, Xuzhou, China. Cryptosporidium oocysts were detected by immunofluorescence microscopy. From January to November of 2015, 180 samples (120 water samples and 60 sediment samples) were collected and analyzed. Among them, 42 (35%) water samples and 28 (47%) sediment samples tested positive for Cryptosporidium. The concentration of Cryptosporidium oocysts in the water samples was 0–8/10 L and 0–260/g in sediment samples. Results revealed that July was the highest risk period for both swimming and diving with an estimated probability of infection from swimming of greater than 18 per 10,000 swim sessions. It was concluded that swimming or diving in Yunlong Lake has a higher risk of Cryptosporidium infection than the acceptable risk level set by the United States Environmental Protection Agency. Thus, regular monitoring of water quality in recreation water bodies is strongly recommended.

scholarly journals Levels and Distribution of Organophosphate Esters (OPEs) in Typical Megacity Wetland Park Landscape Water Bodies in Southwest China

2021 ◽  
Author(s):  
Hongling Yin ◽  
Liya Liu ◽  
Qin Liu ◽  
Jiaojiao Song ◽  
Shuhong Fang ◽  
...  
Keyword(s):  
Surface Water ◽  
Southwest China ◽  
Hydraulic Retention Time ◽  
Average Concentration ◽  
Water Bodies ◽  
Organophosphate Esters ◽  
Sediment Samples ◽  
Suspended Particulate ◽  
Landscape Water ◽  
The City

Abstract Human activities have led to the release of organophosphate esters (OPEs) into the environment. This study aims to investigate the levels and partitioning of OPEs in surface water, suspended particulate matter (SPM) and sediments of landscape waters across eleven parks in the city of Chengdu, a megacity in Southwest China. The average concentration of Σ6OPEs in the SPM samples (median: 2.94×103 ng/L, 6.88×104 ng/g dw) was 1-3 orders of magnitude higher than that in the surface water (median: 359 ng/L) and sediment (median: 82.8 ng/g) samples. Tri-n-butyl phosphate (TnBP), tris-(2-chloroethyl)-phosphate (TCEP) and trichloropropyl phosphate (TCIPP) were the primary OPE pollutants in the surface water and SPM samples, while TnBP, tris-(2-butoxyethyl) phosphate (TBEP) and tris-(2-ethylhexyl) phosphate (TEHP) predominated the sediment samples. The higher log Koc values of OPEs in park landscape water bodies than other studies in the present study could be explained by the OPE properties (foc, Kow, degradability) and the environmental conditions (the input sources and the hydraulic retention time, etc.).

scholarly journals Contamination from an affluent of Furnas reservoir by trace metals

2014 ◽  
Vol 74 (4) ◽  
pp. 877-885 ◽  
Author(s):  
PP Cavalcanti ◽  
LCA Rodrigues ◽  
LA Beijo ◽  
S Barbosa ◽  
TT Xavier ◽  
...  
Keyword(s):  
Trace Metals ◽  
Chemical Analysis ◽  
Water Bodies ◽  
Human Consumption ◽  
Sediment Samples ◽  
Brazilian Legislation ◽  
Water And Sediment ◽  
Subsequent Determination ◽  
Water And Sediment Samples

This study aims to determine concentrations and characterize trace metals distribution in an affluent of Furnas reservoir, Alfenas-MG. Water and sediment samples were taken monthly, 2010/10-2011/07 in five sites of Córrego do Pântano for subsequent determination of Pb, Cd and Zn levels by chemical analysis. The stream studied is in disagreement with Brazilian legislation for Class II water bodies (CONAMA 357). The highlights are the unsuitable concentrations of Pb for human consumption, according to Ministry of Health 2914 decree, providing risk for population.

scholarly journals Microbiological Assessment of Elechi Creek Receiving Wastewater Effluents from Industrial Operations in Port Harcourt City

2021 ◽  
pp. 40-49
Author(s):  
D. N. Ogbonna ◽  
P. C. Meregini-Ikechukwu ◽  
L. B. Kpormon
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Infectious Diseases ◽  
Heterotrophic Bacteria ◽  
Total Coliform ◽  
Water Bodies ◽  
Bacterial Isolates ◽  
Sediment Samples ◽  
Coliform Count ◽  
Wastewater Effluents

Disposal of wastewater and other effluents into water bodies from activities around water bodies have for long been of major concern and challenge to the environment leading to several infectious diseases. The amount of industrial untreated solid wastes from companies, wastewater from car washing activities, open drainages and agricultural runoffs located close to Elechi creek constitutes the wastewater effluents received by the creek thus resulting in the imbalance of the ecosystem. The study was therefore aimed at determining the microbiology of water quality at different stations of the Elechi creek. Surface water, wastewater and sediment samples were collected during a seven month period and analysed using standard microbiological procedures. Results obtained revealed that the average microbial counts ranged as follows: Total Heterotrophic bacteria 1.12±0.13x108 to 1.28±0.09x108 cfu/ml, Total coliform count; 6.4±0.21 to 7.8±0.13 cfu/ml, Total Staphylococcus Count; 6.9±0.06 to 7.9±0.08 cfu/ml, Total Shigella count; 7.9±0.11 to 8.5±0.14 cfu/ml, Total Salmonella Count; 5.4±0.13 to 7.9±0.08 cfu/ml, Total Vibrio Count; 5.9±0.13 to 7.4±0.09 cfu/ml, and Total Pseudomonad Count; 2.5±0.08 to 4.8 ±0.10 cfu/ml, in surface water, Total Heterotrophic bacteria 1.02±0.08 x108 cfu/ml to 2.68±0.08 x108 cfu/ml, Total coliform count; 4.4±0.10a to 4.9±0.11a cfu/ml, Total Staphylococcus Count;4.7±0.10 to 5.9±0.12 cfu/ml, Total Shigella count; 4.0±0.08 to 4.8±0.11 cfu/ml, Total Salmonella Count; 3.2±0.16 to 4.6±0.08 cfu/ml, Total Vibrio Count; 2.0±0.15 to 4.8±0.11 cfu/ml, and Total Pseudomonad Count2.7±0.13 to 3.9±0.09cfu/ml, in wastewater and Total Heterotrophic bacteria 2.16±0.07 x109 cfu/g to 2.24±0.09 x109 cfu/g, Total coliform count; 1.01±0.13 to 1.36±0.06b cfu/g, Total Staphylococcus Count; 6.8±0.11 to 9.1±0.08 cfu/g, Total Shigella count; 4.0±0.09 to 6.5±0.06 cfu/ml, Total Salmonella Count; 4.1±0.11 to 9.7±0.12 cfu/g, Total Vibrio Count; 6.8±0.10 to 9.5±0.09 cfu/g, and Total Pseudomonad Count; 4.0±0.16 to 5.9±0.07 cfu/g, in sediment samples. Bacterial isolates belonging to the genera Bacillus, Staphylococcus, Enterococcus, Pseudomonas, Proteus, Klebsiella, Providencia, Escherichia coli, Salmonella, Shigella, Vibrio and Enterobacter were isolated and identified. The occurrences of these bacterial isolates as potential pathogens could cause poor water quality through fouling and render the water for various uses and may pose a public health threat to our water resources. Adherence to good hygienic practices and proper treatment of wastewater before discharge into the environment should be encouraged to minimize the spread of infectious diseases and fouling of water bodies. This may also affect the aquatic life in such ecosystems.

Algal Demand Drives Sediment Phosphorus Release in a Shallow Eutrophic Cove

2019 ◽  
Vol 62 (5) ◽  
pp. 1315-1324
Author(s):  
James A. McCarty
Keyword(s):  
Water Quality ◽  
Shallow Water ◽  
Sediment Core ◽  
Algal Growth ◽  
Phosphorus Release ◽  
Water Bodies ◽  
Release Rates ◽  
Sediment Samples ◽  
P Release ◽  
Core Incubation

Abstract. Algae play an important role in the internal nutrient cycling of shallow lakes and coves. Algae of shallow water bodies have been shown to thrive and even lead to eutrophic conditions despite a lack of measurable quantities of biologically available phosphorus (P) in the water during summer months. To study how sediment P release and algal growth are connected, water and sediment samples were collected in a shallow eutrophic cove on Beaver Lake in northwest Arkansas. Water quality profiles depicting temperature, dissolved oxygen, nutrients, metals, and photic zone chlorophyll-a were collected weekly from 21 May to 10 July 2018 at three points in the cove: one shallow, one at the cove midpoint, and one at the deepest part of the cove. Cove sediment samples were collected at similar points as the water quality samples for equilibrium P concentration (EPCo) analysis, sediment core incubation, and sediment composition. EPCo for the sediments ranged from 0.024 to 0.027 mg L-1. Sediment cores exposed to aerobic conditions typical of shallow areas had P release rates ranging from 1.37 to 2.02 mg m-2 d-1. Concentrations of soluble reactive P (SRP) in the water column from the weekly water quality sampling averaged 0.002 ±0.003 mg L-1, and photic zone SRP concentrations averaged 0.002 ±0.004 mg L-1 for all sampling sites. The chlorophyll-a concentration increased from 10 to 40 µg L-1 during the period from 21 May to 25 June. When SRP << EPCo, conditions favor the release of SRP from sediments to the overlying water. This was confirmed with the aerobic sediment core incubation in which algal demand was controlled using dark conditions and the release rates were >1.37 mg L-1 d-1. Core aerobic release rates and EPCo conditions both confirmed the release of P under aerobic conditions; however, it appears that algal demand sustained low SRP conditions. This created a nutrient cycle in which algae imposed a nutrient gradient favoring P release by keeping SRP conditions below the EPCo. This study indicates that algal growth potential in shallow water bodies is not limited by SRP concentrations measured within the water column. Studies of shallow water bodies with low SRP concentrations and high productivity should look to the sediments as a source of P to fuel algal growth. Finally, these findings suggest that coves play an integral part in algal production and should not be overlooked when determining the overall P budget for a lake or reservoir. Keywords: Aerobic phosphorus release, Equilibrium phosphorus concentration, Sediment core incubation.

scholarly journals Environmental factors affecting pondweeds in water bodies of northwest Poland

2019 ◽  
Vol 56 (1) ◽  
pp. 13-28
Author(s):  
Marek Merdalski ◽  
Krzysztof Banaś ◽  
Rafał Ronowski
Keyword(s):  
Environmental Factors ◽  
Calcium Content ◽  
Water Bodies ◽  
Mineral Matter ◽  
Mineral Concentration ◽  
Factors Affecting ◽  
Sediment Samples ◽  
Baltic Coast ◽  
Significant Difference ◽  
Nw Poland

Abstract In 32 lakes, 19 watercourses and 11 estuaries located along the southern Baltic coast (NW Poland) taxa of Potomogeton and Stuckenia genera were determined on the basis of 981/0.1 m2 plant samples. Environmental factors affecting them were identified on the basis of 212 water samples and 272 sediment samples. Twenty-one Potamogeton taxa were found, including four hybrids and two Stuckenia species. Twenty-one pondweed species occurred in lakes, thirteen in watercourses and ten in estuaries. There were significant differences in environmental factors in particular types of water bodies (p<0.001) except for the content of organic and mineral matter and of humic acids in the sediment. There was a statistically significant difference (p<0.001) between the environmental factors affecting Potamogeton and Stuckenia, respectively, within each of the waterbody types studied. In lakes, Potamogeton occupied poorer habitats than Stuckenia, with lower conductivity, redox, PAR intensity, concentration of bicarbonates, calcium and chlorides and lower calcium content in the sediment. In watercourses, Potamogeton occurred in less coloured and less oxygenated waters than Stuckenia, but richer in CO2 and chlorides, better insolated and flowing faster. It also occupied less alkaline sediment, but of higher conductivity. In estuaries, Potamogeton occurred in waters with a relatively low concentration of chlorides and calcium than Stuckenia, lower pH and conductivity, but more coloured and, consequently, with lower PAR. C&RT analysis showed mineral concentration (Ca2+, Cl−, HCO3−) in the water, its conductivity, colour and flow to be the highest-ranking environmental factors affecting pondweeds.

Florida Fertilizer Usage Statistics

EDIS ◽  
2017 ◽  
Vol 2017 (3) ◽  
pp. 3
Author(s):  
Travis W. Shaddox ◽  
Joseph Bryan Unruh
Keyword(s):  
Water Bodies ◽  
Policy Makers ◽  
Fact Sheet ◽  
Close Proximity

Nutrient applications are often required to meet Florida’s demand for agricultural and horticultural commodities, but often those applications occur in close proximity to water bodies. In order for scientists, policy makers, and citizens to make decisions regarding nutrient issues in Florida, it is important to first understand which markets contribute to Florida’s fertilizer consumption. This three-page fact sheet explains Florida’s fertilizer usage statistics. Written by T.W.Shaddox and published by the Environmental Horticulture Department.­http://edis.ifas.ufl.edu/ep541

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