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https://www.readbyqxmd.com/read/28918278/heavy-metals-as-hg-and-v-and-stable-isotope-ratios-%C3%AE-13-c-and-%C3%AE-15-n-in-fish-from-yellow-river-estuary-china
#1
Yuan Liu, Guijian Liu, Zijiao Yuan, Houqi Liu, Paul K S Lam
The Yellow River Estuary is a significant fishery, but at present there are few studies about the concentrations of arsenic (As), mercury (Hg) and vanadium (V) in fish from this area, which might cause potential health risk to fish consumers. The aim of this study was to research on the accumulation and potential sources of heavy metals in the fish of the Yellow River Estuary. Arsenic, Hg, V and stable isotope ratios (δ(15)N and δ(13)C) in 11 species of 129 fish were analyzed. Results showed that the concentrations of As and Hg were all lower than the guideline levels established by international organizations and legal limits by several countries...
September 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28891954/assessment-of-heavy-metal-pollution-and-health-risks-in-the-soil-plant-human-system-in-the-yangtze-river-delta-china
#2
Bifeng Hu, Xiaolin Jia, Jie Hu, Dongyun Xu, Fang Xia, Yan Li
Heavy metal (HM) contamination and accumulation is a serious problem around the world due to the toxicity, abundant sources, non-biodegradable properties, and accumulative behaviour of HMs. The degree of soil HM contamination in China, especially in the Yangtze River Delta, is prominent. In this study, 1822 pairs of soil and crop samples at corresponding locations were collected from the southern Yangtze River Delta of China, and the contents of Ni, Cr, Zn, Cd, As, Cu, Hg, and Pb were measured. The single pollution index in soil (SPI) and Nemerow composite pollution index (NCPI) were used to assess the degree of HM pollution in soil, and the crop pollution index (CPI) was used to explore the degree of HM accumulation in crops...
September 10, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28878243/the-environmental-impacts-of-one-of-the-largest-tailing-dam-failures-worldwide
#3
Vanessa Hatje, Rodrigo M A Pedreira, Carlos Eduardo de Rezende, Carlos Augusto França Schettini, Gabriel Cotrim de Souza, Danieli Canaver Marin, Peter Christian Hackspacher
The impacts of the SAMARCO iron tailing spill along more than 650 km, between the dam and the plume of the Doce River in the Atlantic, were assessed by the determination of toxic metals. The tailing spill caused a substantial increase in suspended sediment loads (up to 33,000 mg L(-1)), in addition to large depositions of waste along the Doce basin. The highest estimated transport of dissolved metals was observed for Fe (58.8 μg s(-1)), Ba (37.9 μg s(-1)) and Al (25.0 μg s(-1)). Sediments reached the highest enrichment factors (EFs) for Hg (4,234), Co (133), Fe (43), and Ni (16), whereas As (55), Ba (64), Cr (16), Cu (17), Mn (41), Pb (38) and Zn (82) highest EFs were observed for suspended particulate matter (SPM)...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28822929/enhanced-roadside-drainage-system-for-environmentally-sensitive-areas
#4
William R Trenouth, Bahram Gharabaghi, Hani Farghaly
Stormwater runoff from roadways that encroach upon environmentally sensitive areas (ESAs) is one of the leading causes of degradation in urbanizing watersheds around the world. This is due to toxicity of the pollutant cocktail commonly found in roadway runoff, including heavy metals and sediments, as well as road salts from winter maintenance operations. This paper presents a novel design of an enhanced roadside drainage system (ERDS); an improved roadside drainage system that is intended to protect groundwater recharge zones and sensitive aquatic species in ESAs...
August 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28822338/in-vitro-bioaccessibility-and-health-risk-assessment-of-heavy-metals-in-atmospheric-particulate-matters-from-three-different-functional-areas-of-shanghai-china
#5
Huang Huang, Ying Jiang, Xiaoyun Xu, Xinde Cao
The bioaccessibility and human health risks of heavy metals in PM2.5 and PM10 samples from three functional areas of Shanghai, China including a commercial area (CA), a residential area (RA), and an industrial area (IA), were investigated. Gamble's solution and physiologically based extraction test were employed to simulate human respiratory and digestive system, respectively. Both PM2.5 and PM10 concentration in the three areas exceeded the guideline of WHO, and followed the order of IA>CA≈RA. Zinc and Pb were the most abundant metals with a concentration range of 0...
August 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28815359/heavy-metal-pollution-in-sediments-of-the-largest-reservoir-three-gorges-reservoir-in-china-a-review
#6
Xingjuan Zhao, Bo Gao, Dongyu Xu, Li Gao, Shuhua Yin
The Three Gorges Dam in China is the world's largest dam. Upon its completion in 2003, the Three Gorges Reservoir (TGR) became the largest reservoir in China and plays an important role in economic development and national drinking water safety. However, as a sink and source of heavy metals, there is a lack of continuous and comparative data on heavy metal pollution in sediments. This study reviewed all available literatures published on heavy metals in TGR sediments and further provided a comprehensive assessment of the pollution tendency of these heavy metals...
August 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28802093/clinical-aspects-of-opium-adulterated-with-lead-in-iran-a-review
#7
Samira Alinejad, Jan Aaseth, Mohammad Abdollahi, Hossein Hassanian-Moghaddam, Omid Mehrpour
Adulteration of drugs with poisonous substances during production or consumption has caused numerous health problems. Among contaminants that have the potential of producing poisonous effects are the heavy metals lead, arsenic and thallium that make up an important group of toxic substances. The emergence of these new health problems related to opioid abuse has precipitated this MiniReview on the status of the most hazardous and common opioid adulterants. In fact, adulterated opium is a major public health problem and can threaten the health of users...
August 12, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28796234/electron-microscopy-using-the-genetically-encoded-apex2-tag-in-cultured-mammalian-cells
#8
Jeffrey D Martell, Thomas J Deerinck, Stephanie S Lam, Mark H Ellisman, Alice Y Ting
Electron microscopy (EM) is the premiere technique for high-resolution imaging of cellular ultrastructure. Unambiguous identification of specific proteins or cellular compartments in electron micrographs, however, remains challenging because of difficulties in delivering electron-dense contrast agents to specific subcellular targets within intact cells. We recently reported enhanced ascorbate peroxidase 2 (APEX2) as a broadly applicable genetic tag that generates EM contrast on a specific protein or subcellular compartment of interest...
September 2017: Nature Protocols
https://www.readbyqxmd.com/read/28783778/heavy-metal-leaching-as-affected-by-long-time-organic-waste-fertilizer-application
#9
Jonas Duus Stevens Lekfeldt, Peter E Holm, Charlotte Kjærgaard, Jakob Magid
The recycling of urban waste products as fertilizers in agriculture may introduce contaminants such as heavy metals into soil that may leach and contaminate groundwater. In the present study, we investigated the leaching of heavy metals from intact soil cores collected in the long-term agricultural field trial CRUCIAL. At the time of sampling, the equivalent of >100 yr of urban waste fertilizers following Danish legislation had been applied. The leaching of Cu was significantly increased in the treatments receiving organic waste products compared with the unfertilized control but remained below the permissible level following Danish drinking water guidelines...
July 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28780691/mathematical-model-for-the-transport-of-fluoroquinolone-and-its-resistant-bacteria-in-aquatic-environment
#10
Ritu Gothwal, Shashidhar Thatikonda
Development of antibiotic resistance in environmental bacteria is a direct threat to public health. Therefore, it becomes necessary to understand the fate and transport of antibiotic and its resistant bacteria. This paper presents a mathematical model for spatial and temporal transport of fluoroquinolone and its resistant bacteria in the aquatic environment of the river. The model includes state variables for organic matter, fluoroquinolone, heavy metals, and susceptible and resistant bacteria in the water column and sediment bed...
August 5, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28770081/the-current-status-of-heavy-metal-in-lake-sediments-from-china-pollution-and-ecological-risk-assessment
#11
REVIEW
Yongfeng Xu, Yi Wu, Jiangang Han, Pingping Li
Heavy metal contamination in lake sediments is a serious problem, particularly in developing countries such as China. To evaluate heavy metal pollution and risk of contamination in lake sediments on a national scale in China, we collated available data in the literature of the last 10 years on lake sediments polluted with heavy metals from 24 provinces in China. Based on these data, we used sediment quality guidelines, geoaccumulation index, and potential ecological risk index to assess potential ecological risk levels...
July 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28756463/a-comparative-evaluation-of-different-sediment-quality-guidelines-for-metal-and-metalloid-pollution-in-the-xiangjiang-river-hunan-china
#12
Hui Liu, Kejing Zhang, Liyuan Chai, Zhihui Yang, Weichun Yang, Qi Liao, Huan Li, Yi Liu
To evaluate intensively the quality of the sediments contaminated by heavy metals and metalloids in the Xiangjiang River, 52 surface sediment samples were collected at 13 sites and different combinations of empirical and theoretical sediment quality indexes, the consensus-based sediment quality guidelines, sediment toxicity degree, and equilibrium partitioning method were applied. The average contents of Cd, Pb, Cu, Zn, Hg, Cr, and As in the sampled surface sediments were significantly higher than the background values of trace elements in soils of Hunan Province, China...
July 29, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28733040/variations-in-the-concentrations-of-heavy-metals-through-enforcement-of-a-rest-year-system-and-dredged-sediment-capping-at-the-yellow-sea-byung-dumping-site-korea
#13
Chang-Soo Chung, Ki-Hoon Song, Ki-Young Choi, Young-Il Kim, Hye-Eun Kim, Jun-Mo Jung, Chang-Joon Kim
In 2014, the concentrations of 13 heavy metals in surface sediments from 14 sampling stations were analyzed and compared to samples from previous years to evaluate the remediation effectiveness of the "rest-year" (RY) system and capping with dredged material at the Yellow Sea-Byung dumping site offshore Korea. Since the 2006 introduction of the RY system, annual variations in metal concentrations at stations within the RY zone have gradually decreased over time. Heavy metal concentrations at most stations were lower than sediment quality guidelines, indicating the success of the RY system...
July 18, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28728354/spatial-assessment-of-potential-ecological-risk-of-soil-heavy-metals-from-informal-e-waste-recycling-in-ghana
#14
Vincent Nartey Kyere, Klaus Greve, Sampson Atiemo, James Hawkins Ephraim
The rapidly increasing annual global volumes and the inherently valuable fractions of e-waste have created an avenue for individuals in Agbogbloshie, Accra, Ghana to make a living by utilizing unconventional, uncontrolled, primitive and crude procedures to recycle and recover valuable metals from these wastes. The current form of recycling procedures releases hazardous fractions such as heavy metals into the soils posing a significant risk to ecology and human health. 132 soil samples based on 100 m grid intervals were collected using handheld GPS and analyzed for Cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), lead (Pb) and zinc (Zn) heavy metals...
July 10, 2017: Environmental Health and Toxicology
https://www.readbyqxmd.com/read/28726176/quality-assessment-and-public-health-status-of-harvested-rainwater-in-a-peri-urban-community-in-edo-state-of-nigeria
#15
Isoken H Igbinosa, Isoken T Aighewi
The harvested rainwater is an alternative water source in communities where there is limited or scarcity of water distribution system. However, contamination of roof-harvested rainwater is of immense concern to the general public health. Therefore, this study was initiated to assess the levels of physicochemical quality and heavy metal concentrations in the harvested rainwater from Oluku communities in Benin City, Edo State, Nigeria. The roof-harvested rainwater samples were collected from 20 independent different residential households in Oluku communities, between April 2015 and September 2015...
August 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28695304/heavy-metal-contamination-in-river-water-and-sediments-of-the-swarnamukhi-river-basin-india-risk-assessment-and-environmental-implications
#16
Priyanka Patel, N Janardhana Raju, B C Sundara Raja Reddy, U Suresh, D B Sankar, T V K Reddy
The concentration of heavy metals was analyzed each of 20 river water, suspended sediments and bed sediments along the stretch of Swarnamukhi River Basin. River water is not contaminated with heavy metals except Fe and Mn. Contamination factor in sediments shows considerable to very high degree contamination with Cr, Cu, Pb and Zn. The sources of these metals could be residential wastes, sewer outfall, fertilizers, pesticides (M-45 + carbondine) and traffic activities apart from natural weathering of granitic rocks present in the basin area...
July 10, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28685343/distribution-of-heavy-metals-around-the-barakah-nuclear-power-plant-in-the-united-arab-emirates
#17
Mouza Rashid Al Rashdi, Sulaiman Alaabed, Mohamed El Tokhi, Fares M Howari, Walid El Mowafi, Alya A Arabi
Inductively coupled plasma emission spectroscopy was used to measure the concentrations of heavy metals in 58 samples collected from the Barakah nuclear power plant (BNPP) area, UAE. The grain size distribution was symmetric, but the samples ranged from fine to coarse sand. The inverse relationship between grain size and heavy metal contaminations was validated. The pre-operational average heavy metal contaminations around the BNPP were 0.03, 0.40, 1.2, 2.05, 1.66, 1.6, 5.9, 7.3, 7, 8.8, 60, and 2521 ppm for Cd, Mo, Co, Cu, Pb, As, Zn, Ni, V, Cr, Mn, and Fe, respectively...
July 7, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28677040/bioaccumulation-and-potential-sources-of-heavy-metal-contamination-in-fish-species-in-taiwan-assessment-and-possible-human-health-implications
#18
Chi Thanh Vu, Chitsan Lin, Gavin Yeh, Maria Ching Villanueva
In this study, tissues of five fish species prevalent in the Houjing River were analyzed for heavy metal concentrations. Results show concentrations of such metals to be much higher than internationally recommended standard limits (as determined by the WHO and FAO) and other similar studies. Heavy metal contamination of fish in the Houjing River is hence significant. High hazard and carcinogenic risk related to the Houjing River's fish was proven based on target hazard quotient (THQ) and target cancer risk (TR) estimations...
July 4, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28672235/geochemistry-and-toxicity-of-a-large-slag-pile-and-its-drainage-complex-in-sudbury-ontario
#19
Laura Souter, Shaun A Watmough
Slag piles from mining activities are common worldwide, but in contrast to mine tailings the environmental impact of runoff from slag piles is less documented. This study was designed to assess the geochemistry and potential toxicity of water draining a large, 62.2ha slag pile in Sudbury, Ontario. The Coniston slag pile contains 12-20Mt of slag from smelting local Ni-Cu ore between 1913 and 1972. Slag leaching experiments confirmed slag is a source of sulphate (SO4), heavy metals (including Fe, Al, Ni, Co, Cu, Zn, Pb, Cr, Mn) and base cations (Ca, K, Mg, Na)...
December 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28656577/ecological-risk-assessment-of-heavy-metals-and-polycyclic-aromatic-hydrocarbons-in-sediments-of-rivers-niger-and-benue-confluence-lokoja-central-nigeria
#20
Nwachukwu Ekere, Newman Yakubu, Janefrances Ihedioha
The concentrations of six heavy metals (HMs) and 16 US EPA priority polycyclic aromatic hydrocarbons (PAHs) in sediment samples of the confluence of rivers Niger and Benue were investigated. The ecological risk assessment of the contaminants was carried out. The results showed that the sediment samples were heavily polluted with iron and moderately polluted with Cd while other metals posed no pollution problem when compared with USEPA sediment quality guidelines. Only six out of the 16 priority PAHs were detected in the samples, and source apportionment of the PAHs indicated that they are of pyrogenic origin...
June 27, 2017: Environmental Science and Pollution Research International
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