Geochemical Indicator Articles | Environmental XPRT

Fluoride contamination mapping of groundwater in Northern India integrated with geochemical indicators and GIS

There are many incidents of increasing fluoride concentrations observed in India's groundwater. In the present study, the fluoride content was chemically analysed and integrated with geochemical model WATEQ4F sampled from Allahabad district, Northern India, with other water quality parameters. Geospatial technique was employed to depict the spatial distribution of fluoride concentrations, ...

Nov. 20, 2013

By IWA Publishing

Geochemical Effects of Perozone®: Important for Bio?

Perozone® (peroxide-coated ozone) is used as a stand alone ISCO remediation technique at several sites where chlorinated solvents and their breakdown products are present. In both source and plume area low ppb levels appeared to be achievable. However, in some cases a combined ISCO-BIO approach may lead to lower cost. ISCO is then used for source removal and BIO is used for polishing before site ...

May 18, 2009

By Verhoeve Milieu & Water

Geochemical Distribution of Selected Heavy Metals in Stream Sediments Affected by Tannery Activities

Abstract This study describes the geochemical distribution and potential mobility of selected heavy metals in sediments affected by tanneries established in the Cadeia-Feitoria River basin, South Brazil. Surficial samples were taken at ten sites, in January 2000, during dry season. Metal contents were determined according to their association with main sediment phases by applying a ...

Dec. 31, 2005

Application of multiple geochemical markers to investigate organic pollution in a dynamic coastal zone

Multiple geochemical markers, including aliphatic hydrocarbons (n‐alkanes), linear alkylbenzenes (LABs), and polycyclic aromatic hydrocarbons (PAHs), were employed to relate sediment organic chemical pollution in the coastal zone off South China to socioeconomic development there. Concentrations of Σn‐C15‐35 (n‐alkanes with 15–35 carbon atoms), ΣLAB (sum of C10 to C13 LABs), and Σ26PAH (sum of ...

Nov. 12, 2012

By John Wiley & Sons, Ltd.

Geochemical control processes and potential sediment toxicity in a mine‐impacted lake

Geochemical parameters and major ion concentrations from sediments of a freshwater lake in the town of Åtvidaberg, south‐eastern, Sweden, were used to identify the geochemical processes that control the water chemistry. The lake sediments are anoxic, characterized by reduced sulphur and sulphidic minerals. The hypothesis tested is that in sulphidic‐anaerobic contaminated sediments, the ...

Aug. 28, 2015

By John Wiley & Sons, Ltd.

Hydro-geochemical characteristics of groundwater of Sirhind Nala sub-basin (Ghaggar river basin, India) in relation to salinity hazard

Hydro-geochemical investigation of groundwater of Sirhind Nala sub-basin of the Ghaggar river basin (Southwest Punjab) has been carried out to study the distribution and sources of various dissolved ions. The levels of EC indicated that high salinity of groundwater was confined to small patches. The variations in EC levels seem to be related to non-flushing of water entrapped by clay beds, ...

Jun. 28, 2011

By Inderscience Publishers

Geochemical modelling of the evolution and fate of metal pollutants arising from an abandoned gold mine tailings facility in Johannesburg

Analytical techniques were combined with geochemical modelling to study the release mechanisms of pollutants from an abandoned gold mining tailings storage facility near Johannesburg. Inverse modelling of sampled tailings pond water and experimental single extractions using various solutions indicated which combination of naturally occurring leaching solutions were likely to give rise to the ...

Mar. 13, 2014

By IWA Publishing

Environmental geochemical assessment of the late marshes and swamps of southern Iraq: special focus on heavy metals

The accumulation of six heavy metals in fine-grained sediments from the sediments of the late marshes and swamps of southern Iraq is evaluated. The dynamic features of Euphrates and Tigris rivers influence the distribution of the metals in the study area. In the analysed sediments Co, Zn, Cr and Cu concentrations approach the average concentration in the Earth's crust and uncontaminated ...

Mar. 10, 2009

By Inderscience Publishers

Stability and environmental geochemical profile of toxic heavy metals in soils around a crude oil refinery

Soil samples were taken near oil refinery activities, bulk and fractionated heavy metal contents, as well as other physico-chemical characteristics were measured. The reported results indicate that the enrichment factors of the measured heavy metals were 3.9, 1.8, 1.3, 23.7 and 52.5 for lead, nickel, zinc, cadmium and mercury, respectively. The samples can be considered to be extremely ...

Sep. 12, 2006

By Inderscience Publishers

The age, distribution, and geochemical characteristics of groundwater in the Ordovician limestone aquifer in the Huaibei coalfield, China

In this study, we collected 22 groundwater samples and supporting measurements from different coal-mining districts in the Huaibei coalfield to examine the age, hydro-chemical characteristics, and evolution of groundwater in the Ordovician limestone aquifer (OA). We determined the groundwater concentrations of major ions, stable isotopes (hydrogen and oxygen) and a radio isotope (14C). All the ...

Jan. 1, 2017

By IWA Publishing

Microbial Diversity in Sediments of Saline Qinghai Lake, China: Linking Geochemical Controls to Microbial Ecology

Abstract Saline lakes at high altitudes represent an important and extreme microbial ecosystem, yet little is known about microbial diversity in such environments. The objective of this study was to examine the change of microbial diversity from the bottom of the lake to sediments of 40 cm in depth in a core from Qinghai Lake. The lake is saline (12.5 g/L salinity) and alkaline (pH 9.4) ...

Jan. 7, 2006

Shallow groundwater surrounding the Likeng landfill, Guangzhou, China – major ions and elements indicating the contamination sources

An investigation of groundwater contamination around the Likeng landfill, Guangzhou, was carried out. Major ions and elements of 34 groundwater samples were measured, and the Piper trilinear diagram and expanded Durov diagram were used to analyze the chemical types and hydro-geochemical processes of the groundwater. End Member Mixing Analysis was used to find the types and sources of ...

Sep. 1, 2016

By IWA Publishing

The stability of the relative content ratios of Cu, Pb and Zn in soils and sediments

The study indicates that the relative content ratios of Cu, Pb and Zn in soils and sediments tend to have stability compared to those in meteorites, rocks and organisms. This stability is considered to be associated with their geochemical properties and has no relationship to the existing environments if it is not disturbed by an anthropogenic factor. In addition, it can serve as a background ...

Dec. 1, 2003

By Springer

Environmental toxicity and radioactivity assessment of a titanium processing residue with potential for environmental use

Thorough examination of the physico‐chemical characteristics of a Ti processing residue was undertaken including mineralogical, geochemical, and radiochemical characterisation, and an investigation of the environmental toxicity of softwater leachate generated from the residue. Concentrations of most metals measured in the leachate were low; thus, the residue is unlikely to leach high levels of ...

Feb. 19, 2013

By John Wiley & Sons, Ltd.

Leaching mechanisms of Cr(Vi) from Chromite ore processing residue

Batch leaching tests, qualitative and quantitative x-ray powder diffraction (XRPD) analyses, and geochemical modeling were used to investigate the leaching mechanisms of Cr(VI) from chromite ore processing residue (COPR) samples obtained from an urban area in Hudson County, New Jersey. The pH of the leaching solutions was adjusted to cover a wide range between 1 and 12.5. The concentration levels ...

Oct. 23, 2008

By Soil Science Society of America (SSSA)

Environmental qualitative assessment of rivers sediments

In this study, the concentrations of heavy metals (Ca, Zn, Cu, Fe, Mn, Ni) in thesediment of Shavoor River in Khuzestan Province in Iran has been investigated. After the library studies and field studies, six samples of water and sediment were taken from the river in order to evaluate heavy metal pollution in sediments. To determine the geochemical phases of metals in sediment samples the 5-step ...

Feb. 9, 2015

By GJESM Journal

Assessment of raw materials for cement industry in Sohag area, upper Egypt

In the last few years, cement industry become a major player in materials recycling, although it is environmental polluted industry and a great consumer of limestone and clay. Cement manufacturing depends greatly upon chemical and physical characteristics of raw materials, its quality and quantity, simplicity of its extraction and its costs. Sohag Governorate is surrounded by the Eocene ...

Oct. 1, 2013

By Inderscience Publishers

Field application of ChitoRem chitin complex as a slow release electron donor for dechlorination: Distler Brickyard Site, West Point, KY

Background Chloroethene source area (mainly TCE) is present in low permeability sediments. The objective is to clean up the source and prevent migration of contamination to underlying aquifer, which is a local drinking water source. The selected approach enhances the formation permeability while simultaneously providing an electron donor, chitin, for anaerobic ...

Jun. 25, 2012

By JRW Bioremediation, LLC

Recharge mechanism and hydrochemistry evaluation of groundwater in the Nuaimeh area, Jordan, using environmental isotope techniques

The relationship between the stable isotopic and chemical composition of precipitation and groundwater was studied in the Nuaimeh area of the Ajloun Highlands in Jordan. The isotopic composition values of precipitation and groundwater are almost identical. The spatial variation of stable isotopes in precipitation is mainly due to the effect of seasonal temperature, altitude and amount. The ...

Jan. 1, 2006

By Springer

Principal Component Analyses of Groundwater Chemistry Data During Enhanced Bioremediation

Abstract A bioremediation project has been monitored for two years at a former sour gas plant site that had ethanolamine, glycol and their degradation products in the subsurface. The active enhanced bioremediation program consisted of dewatering and bioventing. An extensive groundwater monitoring program mapped the distribution of chemical species. Principal component analysis was used to ...

Dec. 31, 2005

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