Geospeciation of arsenic using MINTEQA2 for a post-mining lake

2006 ◽  
Vol 54 (11-12) ◽  
pp. 289-299 ◽  
Author(s):  
S.A. Sari ◽  
Z. Ujang ◽  
U.K. Ahmad
Keyword(s):  
Environmental Protection Agency ◽  
Inductively Coupled Plasma ◽  
The United States ◽  
Protection Agency ◽  
High Solubility ◽  
Inductively Coupled ◽  
Ph Values ◽  
Mining Lake ◽  
Icp Ms ◽  
Iron And Manganese

The objective of this study was to investigate the cycling of arsenic in the water column of a post-mining lake. This study is part of a research project to develop health risk assessment for the surrounding population. Inductively Coupled Plasma-Mass Spectrophotometer (ICP-MS) and Capillary Electrophoresis (CE) have been used to analyze the total amount and speciation, respectively. A computer program, called MINTEQA2, which was developed by the United States Environmental Protection Agency (USEPA) was used for predicting arsenic, iron, and manganese as functions of pH and solubility. Studying the pH values and cycle of arsenic shows that the percentage of bound arsenate, As(V) species in the form of HAsO−4 increases with range pH from 5 to 7, as well as Fe(II) and Mn(II). As expected phases of arsenic oxides are FeAsO4 and Mn3(AsO4), as a function of solubility, however none of these phases are over saturated and not precipitated. It means that the phases of arsenic oxides have a high solubility.

scholarly journals Kajian Awal Fitoremediasi Merkuri Pada Caulerpa serrulata dan Halimeda macroloba dari Perairan Teluk Totok

2015 ◽  
Vol 3 (2) ◽  
pp. 8
Author(s):  
Dedy Octavian Siahaan ◽  
Desy M. H. Mantiri ◽  
Antonius Rumengan
Keyword(s):  
Environmental Protection ◽  
Mass Spectroscopy ◽  
Environmental Protection Agency ◽  
Inductively Coupled Plasma ◽  
Protection Agency ◽  
Inductively Coupled ◽  
United State ◽  
Icp Ms

Penelitian ini dilakukan dengan tujuan untuk mengetahui kemampuan alga spesies Caulerpa serrulata dan Halimeda macroloba sebagai agen fitoremediator merkuri di perairan laut. Analisis merkuri pada sedimen dan jaringan alga berdasarkan metode standar United State Environmental Protection Agency (USEPA) yang dilakukan di Water Laboratory Nusantara (WLN) dengan menggunakan Inductively Coupled Plasma Mass Spectroscopy (ICP-MS) instrument. Hasil penelitian memperlihatkan bahwa Caulerpa serrulata mampu mengabsorbsi merkuri sebanyak 0,20 ppm dan Halimeda macroloba mampu mengabsorbsi sebanyak 0,11 ppm dari perairan Teluk Totok. Selain itu kemampuan Caulerpa serrulata dan Halimeda macroloba mentoleransi kadar merkuri yang tinggi di sedimen tempat alga tersebut tumbuh bisa menjadi pertimbangan bahwa alga tersebut memiliki potensi untuk dapat digunakan sebagai salah satu organisme fitoremediaotor merkuri di perairan laut.

Kajian Awal Fitoremediasi Merkuri Pada Caulerpa serrulata dan Halimeda macroloba dari Perairan Teluk Totok

2015 ◽  
Vol 3 (2) ◽  
pp. 8
Author(s):  
Dedy Octavian Siahaan ◽  
Desy M. H. Mantiri ◽  
Antonius Rumengan
Keyword(s):  
Environmental Protection ◽  
Mass Spectroscopy ◽  
Environmental Protection Agency ◽  
Inductively Coupled Plasma ◽  
Protection Agency ◽  
Inductively Coupled ◽  
United State ◽  
Icp Ms

Penelitian ini dilakukan dengan tujuan untuk mengetahui kemampuan alga spesies Caulerpa serrulata dan Halimeda macroloba sebagai agen fitoremediator merkuri di perairan laut. Analisis merkuri pada sedimen dan jaringan alga berdasarkan metode standar United State Environmental Protection Agency (USEPA) yang dilakukan di Water Laboratory Nusantara (WLN) dengan menggunakan Inductively Coupled Plasma Mass Spectroscopy (ICP-MS) instrument. Hasil penelitian memperlihatkan bahwa Caulerpa serrulata mampu mengabsorbsi merkuri sebanyak 0,20 ppm dan Halimeda macroloba mampu mengabsorbsi sebanyak 0,11 ppm dari perairan Teluk Totok. Selain itu kemampuan Caulerpa serrulata dan Halimeda macroloba mentoleransi kadar merkuri yang tinggi di sedimen tempat alga tersebut tumbuh bisa menjadi pertimbangan bahwa alga tersebut memiliki potensi untuk dapat digunakan sebagai salah satu organisme fitoremediaotor merkuri di perairan laut.

scholarly journals Metallic ion release from biocompatible cobalt-based alloy

2014 ◽  
Vol 20 (4) ◽  
pp. 571-577 ◽  
Author(s):  
Ivana Dimic ◽  
Ivana Cvijovic-Alagic ◽  
Ivana Kostic ◽  
Aleksandra Peric-Grujic ◽  
Marko Rakin ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Artificial Saliva ◽  
High Strength ◽  
Metallic Ions ◽  
Ion Release ◽  
Inductively Coupled ◽  
Ph Values ◽  
Metallic Biomaterials ◽  
Icp Ms ◽  
Research Findings

Metallic biomaterials, which are mainly used for the damaged hard tissue replacements, are materials with high strength, excellent toughness and good wear resistance. The disadvantages of metals as implant materials are their susceptibility to corrosion, the elastic modulus mismatch between metals and human hard tissues, relatively high density and metallic ion release which can cause serious health problems. The aim of this study was to examine metallic ion release from Co-Cr-Mo alloy in artificial saliva. In that purpose, alloy samples were immersed into artificial saliva with different pH values (4.0, 5.5 and 7.5). After a certain immersion period (1, 3 and 6 weeks) the concentrations of released ions were determined using Inductively Coupled Plasma - Mass Spectrophotometer (ICP-MS). The research findings were used in order to define the dependence between the concentration of released metallic ions, artificial saliva pH values and immersion time. The determined released metallic ions concentrations were compared with literature data in order to describe and better understand the phenomenon of metallic ion release from the biocompatible cobalt-based alloy.

scholarly journals Determination of total vanadium and vanadium(V) in groundwater from Mt. Etna and estimate of daily intake of vanadium(V) through drinking water

2014 ◽  
Vol 13 (2) ◽  
pp. 522-530 ◽  
Author(s):  
Giovanni Arena ◽  
Chiara Copat ◽  
Angela Dimartino ◽  
Alfina Grasso ◽  
Roberto Fallico ◽  
...  
Keyword(s):  
Drinking Water ◽  
Environmental Protection Agency ◽  
Inductively Coupled Plasma ◽  
Natural Waters ◽  
Daily Intake ◽  
Biological Properties ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Mt Etna ◽  
Plasma Mass Spectrometry

Vanadium(V) can be found in natural waters in the form of V(IV) and V(V) species, which have different biological properties and toxicity. The purpose of this study was to determine the concentrations of total V and V(V) in groundwater from the area of Mt. Etna and to assess the estimated daily intake (EDI) of V(V) of adults and children through drinking water. Water was sampled monthly at 21 sites in 2011. Total vanadium was determined by inductively coupled plasma-mass spectrometry (ICP-MS) and speciation by ion chromatography-ICP-MS (IC-ICP-MS). The concentration of V(V) species ranged from 62.8 to 98.9% of total V, with significantly higher concentrations in samples from the S/SW slope of Mt. Etna. The annual mean concentrations of total V exceeded the Italian legal limit of 140 μg/L at four sites on the S/SW slope. In the absence of thresholds for V(V) intake, only the Environmental Protection Agency (EPA) has calculated a reference dose. Children's EDI of V(V) at the sites with the higher V concentrations exceeded EPA thresholds (9 μg/kg/day). In particular, we found in Camporotondo, Mascalucia, Ragalna and San Pietro Clarenza sites children's EDIs of 11, 9.3, 11 and 9.9, respectively. The EDI of V(V) was significantly higher than the literature range (0.09–0.34 μg/kg/day).

scholarly journals Metal(loid)s in Cucurbita pepo in a Uranium Mining Impacted Area in Northwestern New Mexico, USA

2019 ◽  
Vol 16 (14) ◽  
pp. 2569 ◽  
Author(s):  
Christine Samuel-Nakamura ◽  
Felicia S. Hodge ◽  
Sophie Sokolow ◽  
Abdul-Mehdi S. Ali ◽  
Wendie A. Robbins
Keyword(s):  
Irrigation Water ◽  
Environmental Protection Agency ◽  
Inductively Coupled Plasma ◽  
Cucurbita Pepo ◽  
Mine Waste ◽  
The United States ◽  
Inductively Coupled ◽  
Tolerable Weekly Intake ◽  
The Impact ◽  
Concentration Levels

More than 500 unreclaimed mines and associated waste sites exist on the Navajo Nation reservation as a result of uranium (U) mining from the 1940s through the 1980s. For this study, the impact of U-mine waste on a common, locally grown crop food was examined. The goal of this site-specific study was to determine metal(loid) concentration levels of arsenic (As), cadmium (Cd), cesium (Cs), molybdenum (Mo), lead (Pb), thorium (Th), U, vanadium (V) and selenium (Se) in Cucurbita pepo Linnaeus (squash), irrigation water, and soil using inductively coupled plasma-mass spectrometry. The concentrations of metal(loid)s were greatest in roots > leaves > edible fruit (p < 0.05), respectively. There were significant differences between metal(loid)s in squash crop plot usage (<5 years versus >30 years) for V (p = 0.001), As (p < 0.001), U (p = 0.002), Cs (p = 0.012), Th (p = 0.040), Mo (p = 0.047), and Cd (p = 0.042). Lead and Cd crop irrigation water concentrations exceeded the United States Environmental Protection Agency (USEPA) Maximum Contaminant Levels for drinking water for those metals. Edible squash concentration levels were 0.116 mg/kg of As, 0.248 mg/kg of Pb, 0.020 mg/kg of Cd, and 0.006 mg/kg of U. Calculated human ingestion of edible squash did not exceed Provisional Tolerable Weekly Intake or Tolerable Upper Limit levels from intake based solely on squash consumption. There does not appear to be a food-ingestion risk from metal(loid)s solely from consumption of squash. Safer access and emphasis on consuming regulated water was highlighted. Food intake recommendations were provided. Continued monitoring, surveillance, and further research are recommended.

scholarly journals Assessing the Effectiveness of Microelement Removal in the South Tertiary Wastewater Plant, Riyadh KSA

2015 ◽  
Vol 10 (3) ◽  
pp. 772-780
Author(s):  
Leda G Bousiakou ◽  
Rabia Qindeel ◽  
A. S Almuzaini ◽  
Hosham A Alghamdi ◽  
Walid Tawfik ◽  
...  
Keyword(s):  
Environmental Protection Agency ◽  
Inductively Coupled Plasma ◽  
Treatment Plant ◽  
World Health Organisation ◽  
World Health ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Element Removal ◽  
Final Effluent

This work focuses on the monitoring of trace element removal from the Riyadh South Tertiary Wastewater Treatment plant using inductively coupled plasma mass spectrometry (ICP-MS). Considering that the final effluent originating from the plant is directed for irrigation purposes towards the farms of Al- Dirayia, Dirab and Wadi Hanifa it is important to consider the possible presence of elevated microelement concentrations that could pose potential threats to the human health. All samples were collected from the initial entrance to the plant representing the raw influent as well as the final exit after chlorination, i.e. the final effluent used for irrigation purposes. Results showed that the concentration of aluminium (Al), phosphorus (P), copper (Cu), manganese (Mn) and lead (Pb) were initially elevated at their entrance to the plant compared to the recommended values by the Environmental Protection Agency (EPA) and the World Health Organisation (WHO), while zinc (Zn), chromium (Cr), molybdenum (Mo), selenium (Se), cobalt (Co), uranium ( U), mercury (Hg), arsenic (As), and cadmium (Cd) were within permissible levels. All microelements showed significant reduction of concentration with values well below the maximum recommendations. The observed results are important for assessing the functions and effectiveness of the treatment methods of the plant as well as ensuring that the final effluent is appropriate for agricultural use.

Quadrupole inductively coupled plasma mass spectrometry and sector field ICP-MS: a comparison of analytical methods for the quantification of As, Pb, Cu, Cd, Zn, and U in drinking water

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Héctor Hernández-Mendoza ◽  
Nancy Lara-Almazán ◽  
Abraham Kuri-Cruz ◽  
Elizabeth Teresita Romero-Guzmán ◽  
María Judith Ríos-Lugo
Keyword(s):  
Mass Spectrometry ◽  
Drinking Water ◽  
Inductively Coupled Plasma ◽  
The United States ◽  
Routine Analysis ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Relative Standard ◽  
Plasma Mass Spectrometry ◽  
Precision And Accuracy

Abstract A comparison was carried out between quadrupole inductively coupled plasma mass spectrometry (ICP-QMS) detection and sector field ICP-MS (ICP-SFMS) detection for quantification of elements such as arsenic (As), cadmium (Cd), copper (Cu), lead (Pb), zinc (Zn), and uranium (U) in drinking water. A drinking water sample obtained from the International Atomic Energy Agency was used for validation measurement methods. ICP-QMS and ICP-SFMS obtained recoveries of 95–107% and 95–105%, respectively. Moreover, the relative standard deviation for ICP-QMS was <5% in comparison with ICP-SFMS, which was <2%. The limits of detection obtained in ICP-MS and ICP-SFMS for each element were under ng L−1, except for Zn. Both methods were applied to evaluate these elements in drinking water for consumption in Mexico. According to Mexican Regulation for Human Drinking Water NOM-201-SSA1-2015 and Environmental Protection Agency (EPA) from the United States, the values are within the allowable limits. In conclusion, ICP-QMS and ICP-SFMS are excellent choices for measurements of these toxic elements in water samples because of high precision and accuracy in routine analysis minutes, while also exhibiting excellent precision and accuracy in routine analysis.

scholarly journals Platinum concentrations in urban airborne particles from Shanghai, China

2013 ◽  
Vol 10 (2) ◽  
pp. 169-173 ◽  
Keyword(s):  
Inductively Coupled Plasma ◽  
Ambient Air ◽  
The United States ◽  
Contamination Level ◽  
Urban Air ◽  
Airborne Particle ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Meteorological Influences ◽  
Plasma Mass Spectrometry

The PM10 airborne particle samples were collected at Shanghai from December 2003 to December 2005 in order to investigate platinum contamination in the urban air. The samples were analyzed by inductively coupled plasma mass spectrometry (ICP-MS). The results show that the average Pt concentration in the air of the center of Shanghai was 1.69±0.93 pg m-3 that the increment of the Pt concentrations in Shanghai air was no significant from December 2003 to December 2005, and that the seasonal variations of the Pt concentrations over two years are possibly due to meteorological influences (i.e., wind and rain). The analytical results of the sixteen PM10 samples simultaneously collected at four sampling sites with different traffic intensity in Shanghai show a clear dependence between Pt concentrations and traffic intensity, which suggests that the auto exhaust is the main emission source of Pt in Shanghai air. Compared with the Pt background value of 0.54±0.03 pg m-3, the Pt contamination in the ambient air of the center of Shanghai is significant. However, the Pt contamination level in Shanghai air is lower than one in urban air of some cities in Europe, the United States and Japan.

Scanning electron microscopy of asbestos-containing material where the asbestos fibers are considered locked in a binder

1993 ◽  
Vol 51 ◽  
pp. 472-473
Author(s):  
J. R. Millette ◽  
R. S. Brown
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Environmental Protection Agency ◽  
Building Materials ◽  
The United States ◽  
Protection Agency ◽  
Asbestos Fibers ◽  
Different Types ◽  
Binder Material ◽  
Scanning Electron

The United States Environmental Protection Agency (EPA) has labeled as “friable” those building materials that are likely to readily release fibers. Friable materials when dry, can easily be crumbled, pulverized, or reduced to powder using hand pressure. Other asbestos containing building materials (ACBM) where the asbestos fibers are in a matrix of cement or bituminous or resinous binders are considered non-friable. However, when subjected to sanding, grinding, cutting or other forms of abrasion, these non-friable materials are to be treated as friable asbestos material. There has been a hypothesis that all raw asbestos fibers are encapsulated in solvents and binders and are not released as individual fibers if the material is cut or abraded. Examination of a number of different types of non-friable materials under the SEM show that after cutting or abrasion, tuffs or bundles of fibers are evident on the surfaces of the materials. When these tuffs or bundles are examined, they are shown to contain asbestos fibers which are free from binder material. These free fibers may be released into the air upon further cutting or abrasion.

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