Change in the water quality of industrial channels due to resuspension of sediments contaminated with heavy metals

2001 ◽  
Vol 1 (2) ◽  
pp. 27-35 ◽  
Author(s):  
A. Degtiareva ◽  
M. Elektorowicz
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Water Column ◽  
Solid Phase ◽  
Metal Speciation ◽  
Anoxic Sediments ◽  
Sediment Removal ◽  
Before And After ◽  
Area Of Concern ◽  
The Impact

Industrial channels were used extensively during the two previous centuries and have become heavily contaminated. This study investigates possible water quality changes in the Lachine Canal (Montreal) due to the release of heavy metals (Cd, Ni, Zn and Pb) into the water column during resuspension of anoxic sediments subjected to potential remediation. This release can be initiated by dredging activities for sediment removal. Equilibrium in the water from the Lachine Canal has been calculated using the program EQUILIB from the software FACT. The speciation of heavy metals in the water column was calculated with and without a solid phase before and after possible dredging. Speciation of heavy metals in pore water of anoxic sediments has been calculated, taking into account that corresponding sulfides are the solid phases controlling their solubility. The concentration of heavy metals under anoxic conditions considered could decrease by 8 orders of magnitude. The impact of various scenarios in the area of concern was reviewed from an ecotoxicological perspective. Dredging can possibly change the redox and acid–base conditions in the water column. The impact of dredging will be less if sediments contain calcium. Dredging can lead to an increase in the concentration of heavy metals in the water column and a change of metal speciation.

A Computer Simulation of Water Quality Change Due to Dredging of Heavy Metals Contaminated Sediments in the Old Harbour of Montreal

2001 ◽  
Vol 36 (1) ◽  
pp. 1-19 ◽  
Author(s):  
Antonina Degtiareva ◽  
Maria Elektorowicz
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Water Column ◽  
Solid Phase ◽  
Metal Speciation ◽  
Anoxic Sediments ◽  
Sediment Removal ◽  
Area Of Concern ◽  
And Control ◽  
The Impact

Abstract Aquatic sediments accumulate heavy metals that are discharged into the environment. This study investigates possible water quality changes due to release of heavy metals such as Cd, Ni, Zn and Pb into the water column during dredging of anoxic sediments in the Old Harbour of Montreal. An environmental impact assessment of the sediment removal requires estimating the speciation of heavy metals in the water column with and without the solid phase. Chemical equilibria in the St. Lawrence River water are calculated using the program EQUILIB from the software FACT. Results show that the water is oversaturated with respect to CaMg(CO3)2 and Fe(OH)3. It is speculated that (ZnO)(Fe2O3) and (NiO)(Fe2O3) control the solubility of Zn and Ni in the water. The speciation of heavy metals in pore water of anoxic sediments is calculated, taking into account that the corresponding sulfides are solid phases and control their solubility. The impact of various scenarios on the area of concern is reviewed from an ecotoxicological perspective. Dredging might change the redox and acid-base conditions in the water column. Dredging can lead to an increase in the concentration of heavy metals in the water column and a change of metal speciation, but its impact will be less visible if the sediments contain high levels of calcium acting as a buffer.

scholarly journals Spatial Variation of Water Chemistry in Aries River Catchment Western Romania

2021 ◽  
Vol 11 (14) ◽  
pp. 6592
Author(s):  
Ana Moldovan ◽  
Maria-Alexandra Hoaghia ◽  
Anamaria Iulia Török ◽  
Marius Roman ◽  
Ionut Cornel Mirea ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Water Chemistry ◽  
Water Samples ◽  
Mine Drainage ◽  
Pollution Indices ◽  
Mining Activities ◽  
River Catchment ◽  
High Concentrations ◽  
The Impact

This study aims to investigate the quality and vulnerability of surface water (Aries River catchment) in order to identify the impact of past mining activities. For this purpose, the pollution and water quality indices, Piper and Durov plots, as well vulnerability modeling maps were used. The obtained results indicate that the water samples were contaminated with As, Fe, Mn, Pb and have relatively high concentrations of SO42−, HCO3−, TDS, Ca, K, Mg and high values for the electrical conductivity. Possible sources of the high content of chemicals could be the natural processes or the inputs of the mine drainage. Generally, according to the pollution indices, which were correlated to high concentrations of heavy metals, especially with Pb, Fe and Mn, the water samples were characterized by heavy metals pollution. The water quality index classified the studied water samples into five different classes of quality, namely: unsuitable for drinking, poor, medium, good and excellent quality. Similarly, medium, high and very high vulnerability classes were observed. The Durov and Piper plots classified the waters into Mg-HCO3− and Ca-Cl− types. The past and present mining activities clearly change the water chemistry and alter the quality of the Aries River, with the water requiring specific treatments before use.

scholarly journals Evaluation of Physicochemical and Microbial Quality Control of Hemodialysis Machines Water in Hospitals

2021 ◽  
Vol 12 (1) ◽  
pp. 12-23
Author(s):  
Michael Abbaszadeh ◽  
Mohammad Mosaferi ◽  
Parisa Firouzi ◽  
Mohammad Ali Abedpour ◽  
Samira Sheykholeslami
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Reverse Osmosis ◽  
National Standard ◽  
Microbial Quality ◽  
Dialysis Patients ◽  
Significant Difference ◽  
Before And After ◽  
East Azerbaijan ◽  
Dialysis Water

Abstract Background and Objectives: Water quality is important for preparation of dialysis solution due to its direct relationship with blood of patients with renal failure. The aim of this study was to evaluate the chemical and microbial quality of inlet and outlet water of dialysis devices in hospitals of East Azerbaijan province. Material and Methods: This study was a descriptive-analytical study in which the water of dialysis ward of three hospitals affiliated to East Azerbaijan University of Medical Sciences was investigated. The results of physicochemical (45 cases) and microbial (163 cases) of dialysis water were extracted from the relevant archives in two stages before and after reverse osmosis treatment during 2014-2016. Independent t-test and one-way ANOVA were used for statistical analysis while extracting descriptive statistical parameters. Data analysis was done using Excel and SPSS 23 software. Results: Evaluation of the efficiency of reverse osmosis system showed that there was a significant difference between water quality, before and after the system. Except for calcium, magnesium, fluoride and nitrate, the concentrations of other cations and anions in 100% of samples were lower than the European Pharmacopoeia standard. Incoming water samples to dialysis machine in 4.9% of cases had total coliform contamination and there was no fecal coliform in any of the samples. The frequency and frequency of tests in hospitals are not observed and despite the risk of heavy metals, heavy metals tests are not performed on dialysis water for the health of dialysis patients. Conclusion: The need to develop a national standard for controlling dialysis water, testing all quality parameters of dialysis water according to standards in regular times and timeframes, informing hospital managers and environmental health experts about the importance of dialysis water quality in health and increasing life expectancy of dialysis patients is felt.

Environmental monitoring of astrovirus and norovirus in the Rosetta branch of the River Nile and the El-Rahawy drain, Egypt

2019 ◽  
Vol 19 (5) ◽  
pp. 1381-1387 ◽  
Author(s):  
Mohamed N. F. Shaheen ◽  
Elmahdy M. Elmahdy
Keyword(s):  
Water Quality ◽  
River Water ◽  
River Sediments ◽  
Primary Source ◽  
River Nile ◽  
Detection Rates ◽  
Sediment Samples ◽  
Before And After ◽  
The Impact

Abstract Sewage discharge is considered to be the primary source of viral contamination in aquatic environments. This study was conducted to evaluate the impact of El-Rahawy wastewater on the water quality of the Rosetta branch of the River Nile (Rosetta River Nile) through detection of astrovirus (AstV) and norovirus (NoV) in the water and sediments of both sites. For this purpose, we collected 72 wastewater and 12 sediment samples from El-Rahawy drain, and 12 river water and 12 sediment samples from Rosetta River Nile before and after mixing with El-Rahawy wastewater between April 2017 and March 2018. AstVs and NoVs were identified in wastewater (40.2% versus 25%), El-Rahawy sediment (41.6% versus 20.8%), river water after mixing with wastewater (25% versus 16.6%), river water before mixing with wastewater (8.3% versus 0%), river sediment after mixing with wastewater (16.6% versus 8.3%), and no viruses were found in river sediments before mixing with wastewater. AstV genogroup B and NoV genogroup GI were the most frequently detected genotypes in the analyzed samples, with a peak incidence in the winter months. Increasing detection rates of both viruses in El-Rahawy drain samples and river water taken from the Rosetta branch after receiving El-Rahawy wastewater reflect the impact of this drain on the water quality of this stretch of the River Nile.

Impact of solution variables on the removal of heavy metals from wastewaters by a recycled iron sorbent

2000 ◽  
Vol 42 (1-2) ◽  
pp. 347-352
Author(s):  
E.H. Smith ◽  
S. Chatterjee
Keyword(s):  
Heavy Metals ◽  
Oxalic Acid ◽  
Metal Speciation ◽  
Surface Finishing ◽  
Complexing Agents ◽  
Lead Removal ◽  
Adsorption Equilibria ◽  
Removal Of Heavy Metals ◽  
Cadmium And Lead ◽  
The Impact

Waste shot-blast fines from surface finishing processes have been demonstrated to be effective for removing heavy metals from solution by adsorption.The technology offers the potential for inexpensive recovery and reuse of a material normally discarded as a solid waste. While metal removals compare favorably with those achieved by commercial sorbents, applications issues such as the impact of background metal-complexing agents require investigation. The presence of oxalic acid, a complexing organic compound, impacted cadmium and lead adsorption in accordance with predictions from metal speciation equilibria; i.e., a small but measurable reduction in lead removal was observed, but cadmium adsorption was relatively unaffected. The effects were repeated in dynamic column experiments, with lead removals reduced by 15 to 20% in the presence of the ligand. Efforts to model adsorption equilibria in the presence of oxalic acid did not fully capture the reduced lead removal, presumably because the model does not consider the complete formation of metal-oxalic acid complexes prior to contact with the sorbent.

Effects of sewage discharges on microbial components in tropical coastal waters (Senegal, West Africa)

2008 ◽  
Vol 59 (7) ◽  
pp. 614 ◽  
Author(s):  
Marc Bouvy ◽  
Enora Briand ◽  
Maimouna M. Boup ◽  
Patrice Got ◽  
Christophe Leboulanger ◽  
...  
Keyword(s):  
Water Quality ◽  
Heterotrophic Nanoflagellates ◽  
Anthropogenic Pressure ◽  
The European Union ◽  
Aquatic Communities ◽  
African Countries ◽  
Before And After ◽  
Near Shore ◽  
Bathing Water Quality ◽  
The Impact

Coastal ecosystems are frequently submitted to anthropogenic pressure but little is known about how the dynamics of aquatic communities can be altered. The impact of urban and industrial discharges on microbial plankton was studied in Hann Bay near Dakar (Senegal) on the Atlantic Ocean. Spatial patterns were studied using three transects, with a total of 20 stations, during two periods in May and November (before and after the seasonal upwelling), revealing a clear contrast between near shore stations and the intermediate and seaward stations. In November, phytoplankton were associated with dissolved nutrient availability (e.g. with nitrate, r = 0.76) whereas in May, phytoplankton were more correlated with microbial variables (e.g. with heterotrophic nanoflagellates, r = 0.63). Most samples (40) failed to meet the quality levels for the faecal indicator bacteria (FIB) defined by the European Union bathing water quality directive. The topography plays a major role in water circulation explaining the presence of FIB at the seaward stations. The high prevalence of FIB during the two periods suggests chronic pollution and a potential risk to recreational swimmers and fish consumers in Hann Bay. Thus, as demonstrated in various temperate systems, the decline of water quality constitutes a serious problem in many West African countries.

Corrigendum to: Effects of sewage discharges on microbial components in tropical coastal waters (Senegal, West Africa)

2008 ◽  
Vol 59 (9) ◽  
pp. 838 ◽  
Author(s):  
Marc Bouvy ◽  
Enora Briand ◽  
Maimouna M. Boup ◽  
Patrice Got ◽  
Christophe Leboulanger ◽  
...  
Keyword(s):  
Water Quality ◽  
Heterotrophic Nanoflagellates ◽  
Anthropogenic Pressure ◽  
The European Union ◽  
Aquatic Communities ◽  
African Countries ◽  
Before And After ◽  
Near Shore ◽  
Bathing Water Quality ◽  
The Impact

Coastal ecosystems are frequently submitted to anthropogenic pressure but little is known about how the dynamics of aquatic communities can be altered. The impact of urban and industrial discharges on microbial plankton was studied in Hann Bay near Dakar (Senegal) on the Atlantic Ocean. Spatial patterns were studied using three transects, with a total of 20 stations, during two periods in May and November (before and after the seasonal upwelling), revealing a clear contrast between near shore stations and the intermediate and seaward stations. In November, phytoplankton were associated with dissolved nutrient availability (e.g. with nitrate, r = 0.76) whereas in May, phytoplankton were more correlated with microbial variables (e.g. with heterotrophic nanoflagellates, r = 0.63). Most samples (40) failed to meet the quality levels for the faecal indicator bacteria (FIB) defined by the European Union bathing water quality directive. The topography plays a major role in water circulation explaining the presence of FIB at the seaward stations. The high prevalence of FIB during the two periods suggests chronic pollution and a potential risk to recreational swimmers and fish consumers in Hann Bay. Thus, as demonstrated in various temperate systems, the decline of water quality constitutes a serious problem in many West African countries.

scholarly journals ENVIRONMENTAL IMPACT ASSESSMENT OF HEAVY METALS EFFLUIENT (CHROMIUM & NICKEL) RELEASED INTO ROMI RIVER, KADUNA STATE: A CASE STUDY

2020 ◽  
Vol 4 (3) ◽  
pp. 704-707
Author(s):  
Muhammad Mudassir Usman ◽  
Muhammad Nuruddeen Abdulkareem ◽  
Abdullahi Muhammad ◽  
Kabiru Hamza
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Industrial Effluents ◽  
World Health ◽  
Refinery Effluent ◽  
Iron Nickel ◽  
The Mean ◽  
Health Organization ◽  
The Impact

Industrial effluents discharged into the river poses a serious threat to our environment; the research examines the impact of some heavy metals of Kaduna refinery effluent into the Romi River. It asserts the nature of effluent released into the water body and also the impact of effluent on water quality. However the important water quality became relatively slowly as early human could only judge water quality through the physical senses of sight, taste and smell, now a days there is an increase of contamination of natural water bodies by industrial effluents in developing and densely populated countries like Nigeria, because rivers are major means of waste disposal and especially effluents from industries nearby. The data used in this research were generated from direct field measurement of pH, Conductivity, and Turbidity, heavy metal profiles (Chromium & Nickel) from Kaduna Refinery Effluent. The mean concentrations of the metals; chromium, iron, nickel, and zinc with the standard deviation were found to be: < 0.01 ± 0.1 mg/kg, and 0.06 ± 0.1 mg/kg. This study has shown that the mean concentration of chromium and Nickel found to be lower than the World Health Organization (WHO) acceptable limits while the concentration values of nickel 0.06 ± 0.1 mg/kg and iron 0.06 ± 0.1 mg/kg as found to be higher than the WHO, acceptable limits of the metals) obtained at the effluent points and this implicate the industry adjacent to the area as one of the sources of heavy metals in the river.

scholarly journals The oxbow lakes of the central part of the River Labe - comparative study of water quality and heavy metals concentrations in sediment

Geografie ◽  
2005 ◽  
Vol 110 (3) ◽  
pp. 229-242
Author(s):  
Dagmar Chalupová ◽  
Bohumír Janský
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Comparative Study ◽  
Oxygen Saturation ◽  
Human Activity ◽  
Oxbow Lakes ◽  
Water Loading ◽  
Physical Chemical ◽  
Water Analyses ◽  
The Impact

In the years 2000 and 2002, the research of three fluvial lakes of the central part of the River Labe was carried out. All three localities were chosen to evaluate the environmental state and the impact of human activity. The research included physical, chemical, hydrobiological analyses of water, analyses of sediments and bathymetric measurements. In spite of the identical origin of these lakes, major differences were found e.g. oxygen saturation, BOD5, water loading with nutrients, calcium and chlorides concentrations. Considering the heavy metals in sediments significant differences in concentration - depth relation were determined at each locality as well.

scholarly journals Analysis of Heavy Metal Polution In River Mouths And Estuaries Tondano And Sario IN Manado City North Sulawesi

2014 ◽  
Vol 2 (1) ◽  
pp. 32
Author(s):  
Sandra Tilaar
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Heavy Metal ◽  
Environmental Monitoring ◽  
Water Column ◽  
Coastal Waters ◽  
Metal Analysis ◽  
Heavy Metal Analysis ◽  
North Sulawesi ◽  
River Mouths

This study aims to determine the concentration of heavy metal Hg and Pb in estuary waters Tondano and Sario River in the Bay of Manado, and compare the state of the estuary waters Tondano with Sario estuary waters. Information obtained from this study is expected to be useful for the management of the marine environment, particularly coastal waters, so the environmental monitoring and utilization of coastal areas can be better implemented. The study was conducted for 4 months from September to December 2013. Analasis heavy metal analysis was performed according to the instructions better for Hg, Zn and Pb. The content of Hg and Zn in the water column in the estuary waters Tondano and Sario still within tolerable levels. The content of Pb in the water column in the estuary waters and estuary Tondano and Sario has passed the specified levels and has passed the tolerable levels. Human activity continues to grow around the Gulf waters of Manado so may result in appropriate changes that can lead to contamination, because it is necessary to monitor water quality regularly and continuously.   Keywords: pollution, heavy metals, water quality   A b s t r a k Penelitian ini bertujuan mengetahui konsentrasi logam berat Hg dan Pb pada Perairan Muara Sungai Tondano dan Sungai Sario di Teluk Manado, serta membandingkan keadaan Perairan Muara Sungai Tondano dengan Perairan Muara Sungai Sario. Informasi yang diperoleh dari penelitian ini diharapkan dapat bermanfaat bagi pengelolaan lingkungan perairan, khususnya perairan pantai, sehingga pemantauan lingkungan dan pemanfaatan wilayah pesisir pantai dapat dilaksanakan lebih baik. Penelitian dilakukan selama 4 bulan sejak bulan September sampai dengan bulan Desember 2013. Analasis logam berat dilakukan menurut petunjuk analisis baik untuk Hg, Zn dan Pb. Kandungan Hg dan Zn pada kolom air pada perairan Muara Sungai Tondano dan Muara Sungai Sario masih dalam kadar yang ditoleransi. Kandungan Pb pada kolom air di perairan Muara Sungai Tondano dan Muara Sungai Sario telah melewati kadar yang ditetapkan dan telah melewati kadar yang ditoleransi. Adanya aktivitas manusia yang terus berkembang di sekitar Perairan Teluk Manado sehingga dapat mengakibatkan terjadinya perubahan-perubahan secara tepat yang dapat mengakibatkan pencemaran, karena itu perlu diadakan pemantauan kualitas air secara berkala dan berkesinambungan.   Kata kunci : pencemaran, logam berat, kualitas air

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