Impact of Toxic Metals on Water Quality Around an Abandoned Iron Mine, Bekkaria, Algeria

2020 ◽  
pp. 53-68
Author(s):  
Larbi Djabri ◽  
Lassaad Ghrieb ◽  
Azzedine Hani ◽  
Saad Bouhssina ◽  
Hicham Chaffai ◽  
...  
Keyword(s):  
Water Quality ◽  
Toxic Metals ◽  
Iron Mine

Cyanide and metal pollution by urban snowmelt: impact of deicing compounds

1998 ◽  
Vol 38 (10) ◽  
pp. 223-230 ◽  
Author(s):  
Vladimir Novotny ◽  
Deron Muehring ◽  
Daniel H. Zitomer ◽  
Daniel W. Smith ◽  
Roderick Facey
Keyword(s):  
Water Quality ◽  
Traffic Safety ◽  
Toxic Metals ◽  
Metal Pollution ◽  
High Salt ◽  
Dissolved Metals ◽  
Deicing Salt ◽  
Deicing Chemicals ◽  
Driving Conditions

Highway and road deicing operations provide traffic safety during winter driving conditions in snowbelt areas. Using large quantities of deicing chemicals causes water quality problems that need to be addressed and remediated. Two specific problems are discussed, i.e., presence of cyanides in deicing salt and decreased partitioning of metals in snowmelt resulting from high salt concentrations. Complex ferrocyanide compounds are added to salt to prevent caking. By photodecomposition, these cyanides can be broken down to free toxic cyanide compounds. For toxic metals, salt decreases partitioning between adsorbed (precipitated) and dissolved metals, resulting in an increase in dissolved metals in salt laden snowmelt and consequently increasing toxicity.

scholarly journals Assessment of water quality and genotoxic impact by toxic metals in Geophagus brasiliensis

Chemosphere ◽  
2016 ◽  
Vol 152 ◽  
pp. 328-334 ◽  
Author(s):  
Cássio Resende Morais ◽  
Stephan Malfitano Carvalho ◽  
Galber Rodrigues Araujo ◽  
Henrique Nazareth Souto ◽  
Ana Maria Bonetti ◽  
...  
Keyword(s):  
Water Quality ◽  
Toxic Metals ◽  
Geophagus Brasiliensis

scholarly journals Profiling of toxic metals from fish (tor putitora), water and sediments with microbial and chemical water quality appraisals

2021 ◽  
Vol 28 (4) ◽  
pp. 2527-2533
Author(s):  
Samra Aziz ◽  
Rizwan Ullah ◽  
Mona S Alwahibi ◽  
Mohamed Soliman Elshikh ◽  
Jawaher Alkahtani
Keyword(s):  
Water Quality ◽  
Toxic Metals ◽  
Tor Putitora ◽  
Chemical Water

scholarly journals OPTIMIZATION OF PROCESS OF ADSORTION OF TOXIC METALS IN LABORATORY GENERATED EFFLUENTS THROUGH CAULINITE AND DERIVATIVES

2019 ◽  
Vol 16 (32) ◽  
pp. 69-76
Author(s):  
P. H. A. da HORA ◽  
A. C. de SOUSA ◽  
R. B. G. SERRA ◽  
K. K. P RODRIGUES ◽  
G. J. A. de FIGUÊIREDO
Keyword(s):  
Water Quality ◽  
Toxic Metals ◽  
Environmental Problem ◽  
Classical Method ◽  
Quality Analysis ◽  
Adsorption Potential ◽  
Water Quality Analysis ◽  
The Past ◽  
Teaching Research ◽  
Chemistry Laboratories

The waste generated in chemistry laboratories used in teaching, research and extension activities has been a modern concern, which in the past was neglected, but the current generation's awareness of the environmental problem has caused this issue to be rethought and practices with a more sustainable character, adopted. There is no question that reagents and solutions discarded by laboratories present themselves in concentrations inadequate to be released in conventional environments. In this sense, it is necessary to develop techniques and methods that provide the treatment and enable the emission of these effluents without causing damage to society and nature. In this work the application of crude kaolinite and its respective modifications in the literature (activated in acid and metacaulinite) in the treatment of laboratory effluent solution from a classical method of water quality analysis is carried out. These materials (crude kaolinite, acid activated and metacaulinite) were compared by factorial planning at determined intervals of time and mass in order to verify which conditions kaolinite has the best results in removing the ions in the laboratory effluent solution. The data showed that the crude species presents greater adsorption potential in relation to the modifications made, although such changes in properties are common in the specialized literature..

Environmental Amelioration Using Aquatic Macrophytes: Emphasizing Removal of Heavy Metals from Waste Water

2016 ◽  
Vol 5 (6) ◽  
pp. 244-250
Author(s):  
Anindita Mitra ◽  
Soumya Chatterjee
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Heavy Metal ◽  
Toxic Metals ◽  
Aquatic Macrophytes ◽  
Polluted Water ◽  
Pollution Level ◽  
Primary Role ◽  
Aquatic Life ◽  
Removal Of Heavy Metals

Pollution of the aquatic environment with toxic metals has been attracting considerable attention over the past decades and increasing urbanization, industrialization and overpopulation are the main cause. Due to this toxic pollutant the global water crisis is one of the most serious problems facing by the humanity today as also plants and animals are very sensitive to the presence of these toxic metals. Phytoextraction is the most cost effective and environment friendly way to solve the problem of heavy metal pollution by using plants. Macrophytes are important component of aquatic communities due to their roles in oxygen production, nutrient cycling, water quality control, sediment stabilization to provide habitat and shelter for aquatic life and also for being considered efficient heavy metal accumulators. The main route of heavy metal uptake is through their roots in emergent and surface floating plants whereas, leafy submerged plants uptake heavy metals both through roots and leaves. Roots of wetland plants play the primary role in wastewater purification followed by stems and leaves. Aquatic macrophytes therefore are very useful for the treatment of wastewater to mitigate variety of pollution level and now are the important research issues all over the world. In this review an effort has been made to summarize the role of aquatic macrophytes in the removal of heavy metals from the polluted water to improve the water quality.

Water Quality Effects from an Aquaculture Operation in a Meromictic Iron Pit Lake in Northwestern Ontario, Canada

2010 ◽  
Vol 45 (1) ◽  
pp. 13-24 ◽  
Author(s):  
Kimberly A. McNaughton ◽  
Peter F. Lee
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Nutrient Loading ◽  
Dissolved Inorganic Carbon ◽  
Fish Farm ◽  
Pit Lake ◽  
Fish Food ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Northwestern Ontario ◽  
Iron Mine

Abstract In 1989, aquaculture for the production of rainbow trout (Oncorhynchus mykiss) was started in the upper depths of the 180-m deep Caland pit lake formed after the flooding of the former Steeprock Iron Mine. After ten years of operation, water quality was shown to be affected by the fish farm as well as proximal waste and the surficial geology of the area. Meromictic conditions occurred in the pit lake with a dichotomy in water quality versus depth. A cluster of parameters (ammonia, total phosphorus, total Kjeldahl nitrogen, dissolved organic carbon, B, pH, dissolved oxygen) were either in higher concentrations in the mixolimnion or varied little throughout the entire water column, and a second cluster of parameters had higher levels below the chemocline (conductivity, alkalinity, dissolved inorganic carbon, total dissolved solids, nitrate, sulfate, Ca, Mg, hardness, Na, Cl, K, Fe, Mn, Sr, and silicon dioxide). Statistically significant variations in concentrations among many of these chemical parameters were observed between the two years of study, among depths, and among seasons. Nutrient loading from excess fish food and waste increased phosphorus and ammonia levels. The expansion of the fish farm also reduced the levels of dissolved oxygen in the lower depths of the pit lake, thus reducing the volume of usable water for aquaculture purposes. In the early 2000s the fish farm decreased production and those closed in 2006. Later data showed that nitrate and potassium had corresponding decreases in both the monimolimnion and the mixolimnion. Sulfate levels remained elevated.

Water quality criteria for the protection of human health of 15 toxic metals and their human risk in surface water, China

2021 ◽  
Vol 276 ◽  
pp. 116628
Author(s):  
Xiaonan Wang ◽  
Liang Cui ◽  
Ji Li ◽  
Cong Zhang ◽  
Xiangyun Gao ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Human Health ◽  
Toxic Metals ◽  
Quality Criteria ◽  
Water Quality Criteria ◽  
Human Risk

scholarly journals Environmental Characteristics by Eco-Sanitary and Toxic Criteria of the Cooling Pond of Zaporizhzhya Nuclear Power Plant (Ukraine)

2018 ◽  
Vol 70 ◽  
pp. 1-10
Author(s):  
Оlena Fedonenko ◽  
Tamila Ananieva ◽  
Tetyana Sharamok ◽  
Oleg Marenkov
Keyword(s):  
Water Quality ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
Toxic Metals ◽  
Nuclear Power ◽  
Water Environment ◽  
Ecological Status ◽  
Polluted Water ◽  
Class Iii ◽  
Cooling Pond

It has been investigated the ecological status of the cooling pond of Zaporizhzhya Nuclear Power Plant (NPP) on the hydrochemical and toxicological indicators. The ecological water quality by most hydrochemical and hydrophysical indices corresponds to the class II, category 3, and is characterized as "fairly clean". However, according to the BOD5 index, the water quality is "satisfactory" (class III, category 4). By the contents of both nitrogen of nitrates and phosphorus of phosphates the water quality belongs to the class IV, category 6, as "bad, dirty water". The main anthropogenic pollutants are copper, iron, zinc, and fluorides. The ecological characteristics by their concentrations in the water correspond to the class III, and categories 4–5 of quality, which are "poorly and moderately polluted" water. Accumulation of toxic metals in the surface layer of the reservoir bottom sediments depends on their types, the minimal content is found in sandy sediments, and maximal one is in muddy sediments. The possibility of significant secondary pollution of the water environment by toxic metals is small under the hydrophysical and hydrochemical conditions typical for the cooling pond of Zaporizhzhya NPP. According to the calculations, the value of the average chemical index of ecological quality is "2.5", which characterizes the water of the Zaporizhzhya NPP cooling pond as "good" and "clean".

scholarly journals Assessing toxicity of mining effluents: equilibrium- and kinetics-based metal speciation and algal bioassay

2008 ◽  
Vol 5 (4) ◽  
pp. 307 ◽  
Author(s):  
Yamini Gopalapillai ◽  
Chuni L. Chakrabarti ◽  
David R. S. Lean
Keyword(s):  
Water Quality ◽  
Toxic Metals ◽  
Metal Speciation ◽  
Quality Criteria ◽  
Pseudokirchneriella Subcapitata ◽  
Nutrient Concentrations ◽  
Test Substance ◽  
Water Quality Criteria ◽  
Equilibrium And Kinetics ◽  
Free Metal

Environmental context. The release of mining effluents exposes natural waters to excess metals and thereby threatens both human and environmental health. The present study explores the toxicity of aqueous mining effluents collected from a mining area in Sudbury (Ontario, Canada), using two different methods for determination of metal speciation, and an algal toxicity study. The results show reasonable correlation between metal speciation and the observed toxicity and suggest the importance of taking into account other factors related to water quality criteria such as nutrient concentrations, diluent water and presence of other toxic metals that can greatly influence the toxicological result. Abstract. The present study explores the toxicity of aqueous mining and municipal effluents from the Sudbury area (Canada) using equilibrium- and kinetics-based estimates of metal speciation and chronic toxicity studies using algae (Pseudokirchneriella subcapitata). Free metal ion concentration was determined by the Ion Exchange Technique (IET) and a computer speciation code, Windermere Humic Aqueous Model (WHAM) VI. Labile metal concentration was determined using the Competing Ligand Exchange Method. In general, no correlation was found between the observed IC25 (concentration of test substance that inhibits growth of organism by 25%) and the [Ni]labile, [Ni2+]IET or [Ni2+]WHAM, probably because of contributions by other metals such as Cu and Zn being also significant. Reasonable correlation (r2 = 0.7575) was found when the observed toxicity was compared with the sum of free metal ions of Cu, Ni, and Zn predicted by WHAM. The results of the present study reveal the importance of taking into account other factors related to water quality criteria such as nutrient concentrations, diluent water, and the presence of other toxic metals, which greatly influence the toxicological result in complex, multi-metal contaminated waters.

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