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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
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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)...
June 30, 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
#8
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
https://www.readbyqxmd.com/read/28606516/on-importance-of-impurities-potential-leachables-and-extractables-in-algal-nanocellulose-for-biomedical-use
#9
Jun Liu, Stefan Willför, Albert Mihranyan
Nanocellulose-based biomaterials for biomedical and pharmaceutical applications have been extensively explored. However, studies on different levels of impurities in the nanocellulose and their potential risks are lacking. This article is the most comprehensive to date survey of the importance and characterization of possible leachables and extractables in nanocellulose for biomedical use. In particular, the (1,3)-β-d-glucan interference in endotoxin detection in algal nanocellulose was addressed. Potential lipophilic and hydrophilic leachables, toxic heavy metals, and microbial contaminants are also monitored...
September 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28589272/heavy-metals-distribution-and-risk-assessment-in-soil-from-an-informal-e-waste-recycling-site-in-lagos-state-nigeria
#10
Khadijah A Isimekhai, Hemda Garelick, John Watt, Diane Purchase
Informal E-waste recycling can pose a risk to human health and the environment which this study endeavours to evaluate. The distribution of a number of heavy metals in soil from an informal recycling site in the largest market for used and new electronics and electrical equipment in West Africa was investigated. The potential bioavailability of heavy metals, extent of contamination, potential risk due to the recycling activities and impact of external factors such as rainfall were also assessed. The concentrations of all the heavy metals tested were higher in the area where burning of the waste occurred than at the control site, suggesting an impact of the recycling activities on the soil...
July 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28577217/assessment-of-heavy-metal-pollution-in-the-groundwater-of-the-northern-develi-closed-basin-kayseri-turkey
#11
Şebnem Arslan, Çiğdem Yücel, Süleyman Selim Çallı, Mehmet Çelik
This study was carried out to assess the groundwater pollution in the northern Develi Closed Basin by using the heavy metal pollution index (HPI). Samples from 10 wells and 5 springs were collected in dry and wet seasons and concentrations of Pb, Zn, Cr, Mn, Fe, Cu, Cd, As and B were determined. In both seasons, for more than half of the samples, As, B and Fe concentrations exceeded the Turkish drinking water guideline values. Due to the occurrence of these metals in high concentrations in some samples HPI values are up to 1740...
June 2, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28573332/a-new-comprehensive-ecological-risk-index-for-risk-assessment-on-luanhe-river-china
#12
Kun Bao, Jing-Ling Liu, Xiao-Guang You, Xuan Shi, Bo Meng
With the enhancement of human activities which influence the physical and chemical integrity of ecosystem, it was bound to increase ecological risk to the ecosystem, and the risk assessment of small scale, single pollutant, or only on water quality have been not satisfied the demand of sustainable development of basin water environment. Based on the response relationship between environmental flow requirements guarantee ratio (GEF) and river ecological risk index (ERI), the Sediment Quality Guideline Quotient index (SQG-Q), and the Biotic Index (BI), we construct a new comprehensive ecological risk index (CERI) to evaluate the ecological risk of Luanhe River, China...
June 1, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28550950/levels-and-sources-of-heavy-metals-and-pahs-in-sediment-of-djibouti-city-republic-of-djibouti
#13
Moussa Mahdi Ahmed, Pierre Doumenq, Mohamed Osman Awaleh, Agung Dhamar Syakti, Laurence Asia, Serge Chiron
Selected heavy metals and polycyclic aromatic hydrocarbons (PAHs) were determined in marine sediment from 28 sites Djibouti city. The concentrations of trace elements varied from 0 to 288.1mg/kg with relative abundance of trace metals in sediments was in the order of Zn>Cu>Ni>Cr>Co>Pb>Cd. Zn, Cu and Ni exceeded consensus based sediment quality guideline values 7, 14, 15 sites respectively. Enrichment factor and pollution load index showed relatively low to moderate contamination. The concentrations of total 16 PAHs varied widely depending on the sample location and ranged from 2...
May 24, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28528504/assessment-of-trace-metal-accumulation-in-native-mussels-brachidontes-rodriguezii-from-a-south-american-temperate-estuary
#14
Natalia Sol Buzzi, Ana Laura Oliva, Andrés Hugo Arias, Jorge Eduardo Marcovecchio
The present work provides the first results in heavy metal bioaccumulation in the autochthonous mussel Brachidontes rodriguezii from the Bahía Blanca Estuary (Argentina), one of the most important coastal environments of South America, subjected to different anthropogenic pressure. The study is based on the detection of Cd, Cu, Pb, Mn, and Fe in mussels' soft tissue and sediments' fine fraction by means of inductively coupled plasma atomic emission spectroscopy (ICP-OES), in order to analyze the potential relationship between both components of the aquatic system...
May 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28499260/metal-toxicity-affects-predatory-stream-invertebrates-less-than-other-functional-feeding-groups
#15
Matthias Liess, Nadine V Gerner, Ben J Kefford
Ecosystem effects of heavy metals need to be identified for a retrospective risk assessment, and potential impacts need to be predicted for a prospective risk assessment. In this study, we established a strong correlation between the toxic pressure of dissolved metals and invertebrate species. We compiled available data from a wide geographical range of Australian streams that were contaminated with heavy metals [mainly copper (Cu) and zinc (Zn)] and the corresponding invertebrate communities. Heavy metal toxicity is positively related to the proportion of predators within the invertebrate community, represented by the predatorratio, with an effect threshold range of 2...
August 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28498120/evaluation-of-statistical-distributions-to-analyze-the-pollution-of-cd-and-pb-in-urban-runoff
#16
Amin Toranjian, Safar Marofi
Heavy metal pollution in urban runoff causes severe environmental damage. Identification of these pollutants and their statistical analysis is necessary to provide management guidelines. In this study, 45 continuous probability distribution functions were selected to fit the Cd and Pb data in the runoff events of an urban area during October 2014-May 2015. The sampling was conducted from the outlet of the city basin during seven precipitation events. For evaluation and ranking of the functions, we used the goodness of fit Kolmogorov-Smirnov and Anderson-Darling tests...
May 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28493951/properties-of-biochar-derived-from-wood-and-high-nutrient-biomasses-with-the-aim-of-agronomic-and-environmental-benefits
#17
Rimena R Domingues, Paulo F Trugilho, Carlos A Silva, Isabel Cristina N A de Melo, Leônidas C A Melo, Zuy M Magriotis, Miguel A Sánchez-Monedero
Biochar production and use are part of the modern agenda to recycle wastes, and to retain nutrients, pollutants, and heavy metals in the soil and to offset some greenhouse gas emissions. Biochars from wood (eucalyptus sawdust, pine bark), sugarcane bagasse, and substances rich in nutrients (coffee husk, chicken manure) produced at 350, 450 and 750°C were characterized to identify agronomic and environmental benefits, which may enhance soil quality. Biochars derived from wood and sugarcane have greater potential for improving C storage in tropical soils due to a higher aromatic character, high C concentration, low H/C ratio, and FTIR spectra features as compared to nutrient-rich biochars...
2017: PloS One
https://www.readbyqxmd.com/read/28484873/geo-accumulation-index-and-contamination-factors-of-heavy-metals-zn-and-pb-in-urban-river-sediment
#18
Hazzeman Haris, Ley Juen Looi, Ahmad Zaharin Aris, Nor Farhanna Mokhtar, Nur Ain Ayunie Ayob, Fatimah Md Yusoff, Abu Bakar Salleh, Sarva Mangala Praveena
The aim of the present study was to appraise the levels of heavy metal contamination (Zn and Pb) in sediment of the Langat River (Selangor, Malaysia). Samples were collected randomly from 15 sampling stations located along the Langat River. The parameters measured were pH, redox potential, salinity, electrical conductivity, loss of ignition, cation exchanges capacity (Na, Mg, Ca, K), and metal ions (Zn and Pb). The geo-accumulation index (I geo) and contamination factor (C f) were applied to determine and classify the magnitude of heavy metal pollution in this urban river sediment...
May 8, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28458229/deposition-behavior-risk-assessment-and-source-identification-of-heavy-metals-in-reservoir-sediments-of-northeast-china
#19
Lin Zhu, Jianwei Liu, Shiguo Xu, Zaigang Xie
Sediment cores from five reservoirs, located in the Liaoning and Jilin Provinces in Northeast China, were collected to investigate the accumulation and potential toxicity of heavy metals (Fe, Mn, Cu, Cd, Pb, Zn, and Cr) during a sampling campaign in February, 2015. The results showed that all the detected metals accumulated significantly, especially Cd, compared to their respective background values. Among these reservoirs, Biliuhe Reservoir had markedly increasing trends for organic matter and all the metals, among which Mn was elevated by 280% to 3411mg/kg in a core of only 18cm in depth...
August 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28448918/erosion-of-the-alberta-badlands-produces-highly-variable-and-elevated-heavy-metal-concentrations-in-the-red-deer-river-alberta
#20
Jason G Kerr, Colin A Cooke
Erosion is important in the transport of heavy metals from terrestrial to fluvial environments. In this study, we investigated riverine heavy metal (Cd, Cu, Hg and Pb) dynamics in the Red Deer River (RDR) watershed at sites upstream (n=2) and downstream (n=7) of the Alberta badlands, an area of naturally high erosion. At sites draining the badlands, total water column Cd, Cu, Hg and Pb concentrations frequently exceeded guidelines for the protection of freshwater biota. Furthermore, peak concentrations of total Cd (9...
April 24, 2017: Science of the Total Environment
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