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Environmental Geochemistry and Health

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https://www.readbyqxmd.com/read/29777411/spatial-environmental-risk-evaluation-of-potential-toxic-elements-in-stream-sediments
#1
I M H R Antunes, M T D Albuquerque, N Roque
Potential toxic elements (PTE), in stream sediments, were used as contamination indicators for the definition of high-/low-grade spatial clusters in the Monfortinho area (Central Portugal). A set of 271 stream sediment samples was used for spatial modelling and further definition of rings of enrichment-high and low rings. A three-step multivariate statistical and geostatistical approach was used: (1) principal components analysis for PTE's association evaluation and dimensionality reduction; (2) ordinary kriging as an unbiased interpolator for content inference and construction of a continuous representation of the considered attributes, at any arbitrary spatial location; (3) G clustering algorithm for the definition of high and low significance clusters...
May 18, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29761243/influence-of-chloride-ions-on-the-reduction-of-mercury-species-in-the-presence-of-dissolved-organic-matter
#2
Seyong Lee, Younghee Roh, Kyoung-Woong Kim
Mercuric species, Hg(II), interacts strongly with dissolved organic matter (DOM) through the oxidation, reduction, and complexation that affect the fate, bioavailability, and cycling of mercury, Hg, in aquatic environments. Despite its importance, the reactions between Hg(II) and DOM have rarely been studied in the presence of different concentrations of chloride ions (Cl- ) under anoxic conditions. Here, we report that the extent of Hg(II) reduction in the presence of the reduced DOM decreases with increasing Cl- concentrations...
May 14, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29748733/residues-of-organochlorine-pesticides-ocps-in-aquatic-environment-and-risk-assessment-along-shaying-river-china
#3
Ying Bai, Xiaohong Ruan, J P van der Hoek
Organochlorine pesticides (OCPs) are pesticides with global scale ubiquity, persistence and bioaccumulation, which leave long-term residuals in the water body. OCPs' high toxicity poses significant threats to human health and aquatic biodiversity, making assessment of OCPs' impact on aquatic ecology and human health urgently necessary. In this research, the presence of 16 OCPs in surface water and groundwater along Shaying River, China, as well as OCPs concentration correlations, was investigated at 24 selected sampling sites...
May 10, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29748732/site-specific-bioaccumulation-of-polychlorinated-dibenzo-p-dioxins-and-polychlorinated-dibenzofurans-pcdd-pcdfs-in-mothers-and-their-infants-living-in-vicinity-of-bien-hoa-airbase-southern-vietnam
#4
Nguyen Thi Minh Hue, Nguyen Van Thuong, Pham Thi Ngoc Mai, Nguyen Hung Minh
Bien Hoa airbase is located in Dong Nai Province (Southern Vietnam). Several sites within the airbase are highly contaminated by Agent Orange/Dioxin, and thus, they are also commonly named as an Agent Orange/Dioxin hotpot. In the present study, 36 maternal milk samples were collected from primiparas who have lived at least 5 years in four wards, Buu Long, Quang Vinh, Trung Dung and Tan Phong, which are closed to Bien Hoa airbase in order to investigate the level and distribution of Agent Orange/Dioxin exposure in different local communities...
May 10, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29744699/indoor-particle-dynamics-in-a-school-office-determination-of-particle-concentrations-deposition-rates-and-penetration-factors-under-naturally-ventilated-conditions
#5
X C Cong, J J Zhao, Z Jing, Q G Wang, P F Ni
Recently, the problem of indoor particulate matter pollution has received much attention. An increasing number of epidemiological studies show that the concentration of atmospheric particulate matter has a significant effect on human health, even at very low concentrations. Most of these investigations have relied upon outdoor particle concentrations as surrogates of human exposures. However, considering that the concentration distribution of the indoor particulate matter is largely dependent on the extent to which these particles penetrate the building and on the degree of suspension in the indoor air, human exposures to particles of outdoor origin may not be equal to outdoor particle concentration levels...
May 9, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29744698/assessing-the-potential-ecological-risk-of-co-cr-cu-fe-and-zn-in-the-sediments-of-hooghly-matla-estuarine-system-india
#6
Somdeep Ghosh, Madhurima Bakshi, Alok Kumar, A L Ramanathan, Jayanta Kumar Biswas, Subarna Bhattacharyya, Punarbasu Chaudhuri, Sabry M Shaheen, Jörg Rinklebe
Hooghly-Matla estuarine system along with the Sundarbans mangroves forms one of the most diverse and vulnerable ecosystems in the world. We have investigated the distribution of Co, Cr, Cu, Fe and Zn along with sediment properties at six locations [Shamshernagar (S1), Kumirmari (S2 and S3), Petuaghat (S4), Tapoban (S5) and Chemaguri (S6)] in the Hooghly estuary and reclaimed islands of the Sundarbans for assessing the degree of contamination and potential ecological risks. Enrichment factor values (0.9-21.6) show enrichment of Co, Cu and Zn in the intertidal sediments considering all sampling locations and depth profiles...
May 9, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29713926/geochemical-fractionation-of-metals-and-metalloids-in-tailings-and-appraisal-of-environmental-pollution-in-the-abandoned-musina-copper-mine-south-africa
#7
M W Gitari, S A Akinyemi, L Ramugondo, M Matidza, S E Mhlongo
The economic benefits of mining industry have often overshadowed the serious challenges posed to the environments through huge volume of tailings generated and disposed in tailings dumps. Some of these challenges include the surface and groundwater contamination, dust, and inability to utilize the land for developmental purposes. The abandoned copper mine tailings in Musina (Limpopo province, South Africa) was investigated for particle size distribution, mineralogy, physicochemical properties using arrays of granulometric, X-ray diffraction, and X-ray fluorescence analyses...
April 30, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29696495/improving-arsenopyrite-oxidation-rate-laws-implications-for-arsenic-mobilization-during-aquifer-storage-and-recovery-asr
#8
Chelsea W Neil, M Jason Todd, Y Jeffrey Yang
Aquifer storage and recovery (ASR) and aquifer recharge (AR) provide technical solutions to address water supply deficits and growing future water demands. Unfortunately, the mobilization of naturally present arsenic due to ASR/AR operations has undermined its application on a larger scale. Predicting arsenic mobility in the subsurface during ASR/AR is further complicated by site-specific factors, including the arsenic mobilization mechanisms, groundwater flow conditions, and multi-phase geochemical interactions...
April 25, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29696494/heavy-metal-exposure-has-adverse-effects-on-the-growth-and-development-of-preschool-children
#9
Xiang Zeng, Xijin Xu, Qilin Qin, Kai Ye, Weidong Wu, Xia Huo
The purpose of this study was to investigate the associations between levels of lead (Pb), cadmium (Cd), chromium (Cr), and manganese (Mn) in the PM2.5 and blood and physical growth, and development parameters including birth length and weight, height, weight, body mass index (BMI), head circumference, and chest circumference in preschool children from Guiyu (e-waste exposure area) and Haojiang (the reference area). A total of 470 preschool children from Guiyu and Haojiang located in southeast coast of China were recruited and required to undergo physical examination and blood tests during the study period...
April 25, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29691784/contamination-characteristics-of-trace-metals-in-dust-from-different-levels-of-roads-of-a-heavily-air-polluted-city-in-north-china
#10
Zhiguo Cao, Qiaoying Chen, Xiaoying Wang, Yajie Zhang, Shihua Wang, Mengmeng Wang, Leicheng Zhao, Guangxuan Yan, Xin Zhang, Ziyang Zhang, Tianfang Yang, Mohai Shen, Jianhui Sun
Concentrations of eight trace metals (TMs) in road dust (RD) (particles < 25 μm) from urban areas of Xinxiang, China, were determined by inductively coupled plasma mass spectrometry. The geometric mean concentrations of Zn, Mn, Pb, As, Cu, Cr, Ni and Cd were 489, 350, 114, 101, 60.0, 39.7, 31.6, and 5.1 mg kg-1 , respectively. When compared with TM levels in background soil, the samples generally display elevated TM concentrations, except for Cr and Mn, and for Cd the enrichment value was 69.6. Spatial variations indicated TMs in RD from park path would have similar sources with main roads, collector streets and bypasses...
April 24, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29681023/organochlorines-in-urban-soils-from-central-india-probabilistic-health-hazard-and-risk-implications-to-human-population
#11
Bhupander Kumar, Meenu Mishra, V K Verma, Premanjali Rai, Sanjay Kumar
This study presents distribution of organochlorines (OCs) including HCH, DDT and PCBs in urban soils, and their environmental and human health risk. Forty-eight soil samples were extracted using ultrasonication, cleaned with modified silica gel chromatography and analyzed by GC-ECD. The observed concentrations of ∑HCH, ∑DDT and ∑PCBs in soils ranged between < 0.01-2.54, 1.30-27.41 and < 0.01-62.8 µg kg-1 , respectively, which were lower than the recommended soil quality guidelines. Human health risk was estimated following recommended guidelines...
April 21, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29679198/the-association-between-heavy-metal-soil-pollution-and-stomach-cancer-a-case-study-in-hangzhou-city-china
#12
Xufeng Fei, Zhaohan Lou, George Christakos, Zhouqiao Ren, Qingmin Liu, Xiaonan Lv
Stomach cancer (SC) is a severe health burden, with nearly half of the world's cases found in China. Noticeably, the emissions of heavy metals into the environment have increased alongside rapid urbanization and industrialization in China. However, as regards carcinogenic associations, the relationship between heavy metals and SC is yet unclear. Based on 9378 newly diagnosed SC cases in Hangzhou City from 2009 to 2012, this work is concerned with the quantitative characterization of the spatial distribution pattern of SC incidence and its geographical association with soil heavy metals by means of a novel geographical model...
April 20, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29671112/the-comparison-of-selenium-and-lead-accumulation-between-contaminated-muddy-and-sandy-sediments-from-four-estuaries-along-the-persian-gulf-effect-of-grain-size
#13
Mehdi Hosseini, Nooshin Sajjadi
Persian Gulf is one of the most important water sources in the economically developed south part of Iran, and metal pollution is a major concern for the Gulf. The bioavailability and distribution of selenium (Se) and lead (Pb) between muddy and sandy sediments from four estuaries along the Persian Gulf were analyzed. The geoaccumulation index and enrichment factor for metals and correlation between particles size with metals concentration were studied. The average concentration of metals in sediment was ranged 0...
April 18, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29651760/stabilization-of-cd-pb-cu-and-zn-contaminated-calcareous-agricultural-soil-using-red-mud-a-field-experiment
#14
Yangyang Wang, Fangfang Li, Jian Song, Ruiyang Xiao, Lin Luo, Zhihui Yang, Liyuan Chai
Red mud (RM) was used to remediate heavy metal-contaminated soils. Experiments with two different dosages of RM added to soils were carried out in this study. It was found that soil pH increased 0.3 and 0.5 unit with the dosage of 3 and 5% (wt%), respectively. At the dosage of 5%, the highest stabilization efficiencies for Cd, Pb, Cu and Zn reached 67.95, 64.21, 43.73 and 63.73%, respectively. The addition of RM obviously transferred Cd from the exchangeable fraction to the residual fraction. Meanwhile, in comparison with the control (no RM added), it reduced 24...
April 12, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29644506/uptake-and-accumulation-of-potentially-toxic-elements-in-colonized-plant-species-around-the-world-s-largest-antimony-mine-area-china
#15
Jiumei Long, Di Tan, Sihan Deng, Ming Lei
To provide information on reclamation of multi-heavy metal polluted soils with conception of phytostabilization, a field survey on the uptake and accumulation of potentially toxic elements such as antimony (Sb), arsenic (As), lead (Pb), cadmium (Cd), copper (Cu), and zinc (Zn) in colonized plant species around the world's largest antimony mine area, China, was conducted. Samples including leaves and shoots (including roots and stems) of colonized plants as well as rhizospheric soils were collected from eight sampling zones in the studied area...
April 11, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29633054/toxicity-assessment-of-copper-by-electrochemically-active-bacteria-in-wastewater
#16
Lijuan Zhang, Sam Fong Yau Li, Huchun Tao
A bioelectrochemical sensor (BES) was constructed for toxicity assessment of copper in contaminated domestic sewage. Electrochemically active bacteria (EAB), whose growth was supported by the bioenergy generated from an in situ metallurgical process, functioned as the sensing elements. The external resistance of metallurgical BES was optimized based on linear sweep voltammetry analysis. The stabilized BES was utilized to monitor the copper toxicity in real wastewater. During the less than 1-h sensing period, copper concentration ranging from 1 to 5 mg L-1 could be detected...
April 9, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29627928/toxic-effects-of-coal-fly-ash-on-wheat-seedlings
#17
Zhongbin Liao, Xin Xiao, Yingying Hu, Xiaofei Sun, Hui Wang, Hongxuan Zhou, Yu Ma, James Li
We studied heavy metal (HM) stress on wheat seedlings (AK-58) with and without coal fly ash (CFA) exposure. Three CFA spray rates were used to simulate air quality of the second level. Results show airborne particulates can directly enter plant leaves, affecting the whole plant. HM deposition decreases seedling size and mass and reduces activities of the chlorophyll family, photosynthesis enzymes (RuBP and PEPC), and photosynthesis efficiency. In leaves, HM deposition increases with the CFA spray rate. In roots, however, CFA exposure seems to reduce HM deposition, compared with the control without CFA exposure...
April 7, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29623519/comparisons-of-human-risk-assessment-models-for-heavy-metal-contamination-within-abandoned-metal-mine-areas-in-korea
#18
Sang-Woo Lee, Hyen Goo Cho, Soon-Oh Kim
This study was initiated to develop a model specialized to conduct human risk assessments (HRAs) of abandoned metal mine areas in Korea. The Korean guideline (KG) model used in study was formulated via modification of the original Korean guidelines on HRAs of soil contamination. In addition, the newly developed model was applied to the HRAs of two abandoned metal mines contaminated with arsenic (As) and heavy metals (Cd, Cu, Pb, and Zn). The results of the KG model were compared with those of two internationally renowned models [Contaminated land exposure assessment (CLEA) and CSOIL models]...
April 6, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29623514/pollution-indices-as-useful-tools-for-the-comprehensive-evaluation-of-the-degree-of-soil-contamination-a-review
#19
REVIEW
Joanna Beata Kowalska, Ryszard Mazurek, Michał Gąsiorek, Tomasz Zaleski
The paper provides a complex, critical assessment of heavy metal soil pollution using different indices. Pollution indices are widely considered a useful tool for the comprehensive evaluation of the degree of contamination. Moreover, they can have a great importance in the assessment of soil quality and the prediction of future ecosystem sustainability, especially in the case of farmlands. Eighteen indices previously described by several authors (Igeo , PI, EF, Cf , PIsum , PINemerow , PLI, PIave , PIVector , PIN, MEC, CSI, MERMQ, Cdeg , RI, mCd and ExF) as well as the newly published Biogeochemical Index (BGI) were compared...
April 5, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29603086/temporal-and-spatial-variations-of-pm-2-5-organic-and-elemental-carbon-in-central-india
#20
Rakesh Kumar Sahu, Shamsh Pervez, Judith C Chow, John G Watson, Suresh Tiwari, Abhilash S Panicker, Rajan K Chakrabarty, Yasmeen Fatima Pervez
This study describes spatiotemporal patterns from October 2015 to September 2016 for PM2.5 mass and carbon measurements in rural (Kosmarra), urban (Raipur), and industrial (Bhilai) environments, in Chhattisgarh, Central India. Twenty-four-hour samples were acquired once every other week at the rural and industrial sites. Twelve-hour daytime and nighttime samples were acquired either a once a week or once every other week at the urban site. Each site was equipped with two portable, battery-powered, miniVol air samplers with PM2...
March 30, 2018: Environmental Geochemistry and Health
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