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Environmental Geochemistry and Health

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https://www.readbyqxmd.com/read/28424945/date-palm-waste-biochars-alter-a-soil-respiration-microbial-biomass-carbon-and-heavy-metal-mobility-in-contaminated-mined-soil
#1
Mohammad I Al-Wabel, Adel Rabie A Usman, Abdullah S Al-Farraj, Yong Sik Ok, Adel Abduljabbar, Abdulelah I Al-Faraj, Abdelazeem S Sallam
A 30-day incubation experiment was conducted using a heavy metal-contaminated mined soil amended with date palm feedstock (FS) and its derivative biochars (BCs) at three pyrolysis temperatures of 300 (BC-300), 500 (BC-500), and 700 °C (BC-700) with different application rates (0.0, 5, 15, and 30 g kg(-1)) to investigate their short-term effects on soil respiration (CO2-C efflux), microbial biomass carbon (MBC), soil organic carbon (SOC), mobile fraction of heavy metals (Cd, Cu, Pb, Zn, Mn, and Fe), pH, and electrical conductivity (EC)...
April 19, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28417281/historical-record-of-anthropogenic-polycyclic-aromatic-hydrocarbons-in-a-lake-sediment-from-the-southern-tibetan-plateau
#2
Ruiqiang Yang, Ruichen Zhou, Ting Xie, Chuanyong Jing
High-altitude lake sediments can be used as natural archives to reconstruct the history of pollutants. In this work, the temporal distribution of polycyclic aromatic hydrocarbons (PAHs) was determined in a sediment core collected from the southern Tibetan Plateau (TP), which was dated by using the (210)Pb dating method and validated with the (137)Cs fallout peak. The concentrations of the anthropogenic PAHs (Σ8PAH) in the sediment core ranged from 0.83 to 12 ng/g dw, and the fluxes of the Σ8PAH were in the range of 2...
April 17, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28405785/determination-of-the-potential-implementation-impact-of-2016-ministry-of-environmental-protection-generic-assessment-criteria-for-potentially-contaminated-sites-in-china
#3
Yuanyuan Cheng, Yu-Ting Tang, C Paul Nathanail
The Ministry of Environmental Protection of China issued a 3rd draft edition of risk-based Generic Assessment Criteria (the MEP-GAC) in March 2016. Since these will be the first authoritative GAC in China, their implementation is likely to have a significant impact on China's growing contaminated land management sector. This study aims to determine the potential implementation impact of the MEP-GAC through an in-depth analysis of the management context, land use scenarios, health criteria values adopted and exposure pathways considered...
April 12, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28401376/selenium-deficiency-in-subtropical-littoral-pampas-environmental-and-dietary-aspects
#4
N Mirlean, E R Seus-Arrache, O Vlasova
Se deficiency has a critical effect on human health. The littoral near Patos Lagoon in the south of Brazil is composed of Quaternary sandy deposits and nutrient-deficient soils, which contribute to Se deficiency in the surrounding environment. The average concentration of Se in littoral soils is six times lower than the metalloid deficiency threshold of 0.5 mg kg(-1) and is close to that in countries where Keshan disease is registered. The sediments in the Patos Estuary are also notably lower in Se than near-shore marine sediments...
April 11, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28401375/trace-elements-in-surface-sediments-of-the-hooghly-ganges-estuary-distribution-and-contamination-risk-assessment
#5
Santosh Kumar Sarkar, Priyanka Mondal, Jayanta Kumar Biswas, Eilhann E Kwon, Yong Sik Ok, Jörg Rinklebe
Our objective was to evaluate distribution and accumulation of trace elements (TEs) in surface sediments along the Hooghly (Ganges) River Estuary, India, and to assess the potential risk with view to human health. The TE concentrations (mg kg(-1) dry weight) exhibited a wide range in the following order: Al (31.801 ± 15.943) > Fe (23.337 ± 7584) > Mn (461 ± 147) > S (381 ± 235) > Zn (54 ± 18) > V (43 ± 14) > Cr (39 ± 15) > As (34 ± 15) > Cu (27 ± 11) > Ni (24 ± 9) > Se (17 ± 8) > Co (11 ± 3) > Mo (10 ± 2) > Hg (0...
April 11, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28397064/an-exposure-risk-assessment-for-potentially-toxic-elements-in-rice-and-bulgur
#6
Sait C Sofuoglu, Aysun Sofuoglu
Rice and wheat are rich sources of essential elements. However, they may also accumulate potentially toxic elements (PTE). Bulgur, the popular alternative to rice in the eastern Mediterranean, is produced by processing wheat, during which PTE content may change. This study determined PTE concentrations in rice and bulgur collected from 50 participant households in the city of Izmir, Turkey, estimated ingestion exposure, and associated chronic-toxic and carcinogenic human health risks. Comparison of the determined concentrations to the available standard levels and the levels reported in the literature revealed that Cd, Co, and Pb in rice might be of concern...
April 10, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28397063/brominated-flame-retardants-and-dechlorane-plus-on-a-remote-high-mountain-of-the-eastern-tibetan-plateau-implications-for-regional-sources-and-environmental-behaviors
#7
Xin Liu, Haijian Bing, Yanzhi Chen, Jun Li, Yanhong Wu, Gan Zhang
We investigated the occurrence of halogenated flame retardants (HFRs) including polybrominated diphenyl ethers (PBDEs), six novel brominated flame retardants (NBFRs) and dechlorane plus in air and soils on the eastern slope of Mt. Gongga on the eastern Tibetan Plateau. We detected all of the NBFR except bis(2-ethylhexyl)-tetrabromophthalate and pentabromoethyl benzene. NBFRs constituted the most prevalent group. BDE-28 and BDE-47 dominated among the PBDE congeners. Decabromodiphenyl ethane was detected at relatively high levels up to 171 pg/m(3) and 1450 pg/g dry weight in air and soils, respectively; however, it appeared to be easily degraded in the environment...
April 10, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28397062/multi-metal-resistance-and-plant-growth-promotion-potential-of-a-wastewater-bacterium-pseudomonas-aeruginosa-and-its-synergistic-benefits
#8
Jayanta Kumar Biswas, Monojit Mondal, Jörg Rinklebe, Santosh Kumar Sarkar, Punarbasu Chaudhuri, Mahendra Rai, Sabry M Shaheen, Hocheol Song, Muhammad Rizwan
Water and soil pollution by toxic heavy metals (HMs) is increasing globally because of increase in population, industrialization and urbanization. It is a burning problem for the public, scientists, academicians and politicians how to tackle the toxic contaminants which jeopardize the environment. One possible solution for pollution abatement is a bioremediation-effective and innovative technology that uses biological systems for treatment of contaminants. Many bacteria synthesize indole-3-acetic acid (IAA) which is a product of L-tryptophan metabolism and belongs to the auxin class of plant growth-promoting hormone...
April 10, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28364400/impact-of-raking-and-bioturbation-mediated-ecological-manipulation-on-sediment-water-phosphorus-diagenesis-a-mesocosm-study-supported-with-radioactive-signature
#9
Jayanta K Biswas, Saumen Hazra, Jayjit Majumdar, Sushil K Mandal, Sabry M Shaheen, Santosh K Sarkar, Ralph Meissner, Erik Meers, Jörg Rinklebe
The study examined the impact of raking and fish bioturbation on modulating phosphorus (P) concentrations in the water and sediment under different trophic conditions. An outdoor experiment was set to monitor physicochemical and microbiological parameters of water and sediment influencing P diagenesis. A pilot study with radioactive (32)P was also performed under the agency of raking and bacteria (Bacillus sp.). Raking was more effective in release of P under unfertilized conditions by significantly enhancing orthophosphate (35%) and soluble reactive phosphate (31...
March 31, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28357613/analysis-of-a-broad-range-of-perfluoroalkyl-acids-in-accipiter-feathers-method-optimization-and-their-occurrence-in-nam-co-basin-tibetan-plateau
#10
Yili Li, Ke Gao, Bu Duo, Guoshuai Zhang, Zhiyuan Cong, Yan Gao, Jianjie Fu, Aiqian Zhang, Guibin Jiang
Perfluoroalkyl acids (PFAAs) are ubiquitous in the environment. They are prone to accumulate in organisms and have raised public attention in recent decades. Feather samples have been successfully applied as nondestructive indicators for several contaminants. However, a sophisticated analytical method for determining PFAAs in feathers is still lacking. In the present study, a series of conditions, such as the use of the solid-phase extraction cartridge type and extraction/digestion methods, were optimized for the analysis of 13 PFAAs in feathers...
March 29, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28353054/application-of-artificial-neural-network-in-medical-geochemistry
#11
K Fajčíková, B Stehlíková, V Cvečková, S Rapant
For the evaluation of various adverse health effects of chemical elements occurring in the environment on humans, the comparison and linking of geochemical data (chemical composition of groundwater, soils, and dusts) with data on health status of population (so-called health indicators) play a key role. Geochemical and health data are predominantly nonlinear, and the use of standard statistical methods can lead to wrong conclusions. For linking such data, we find appropriate the use method of artificial neural networks (ANNs) which enable to eliminate data inhomogeneity and also potential data errors...
March 28, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28353053/influence-of-physico-chemical-properties-of-soil-clay-fractions-on-the-retention-of-dissolved-organic-carbon
#12
Mandeep Singh, Binoy Sarkar, Sabir Hussain, Yong Sik Ok, Nanthi S Bolan, Gordon Jock Churchman
This study investigated the effects of surface functional groups, cation exchange capacity (CEC), surface charge, sesquioxides and specific surface area (SSA) of three soil clay fractions (SCFs) (kaolinite-illite, smectite and allophane) on the retention of dissolved organic carbon (DOC) in soils. Physico-chemical properties of the SCFs before and after removing native carbon and/or sesquioxides were characterised, and the DOC adsorption-desorption tests were conducted by a batch method. Native organic carbon (OC)/sesquioxide removal treatments led to a small change in the CEC values of kaolinite-illite, but significant changes in those of smectite and allophane...
March 28, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28343275/potential-toxic-elements-in-stream-sediments-soils-and-waters-in-an-abandoned-radium-mine-central-portugal
#13
I M H R Antunes, A M R Neiva, M T D Albuquerque, P C S Carvalho, A C T Santos, Pedro P Cunha
The Alto da Várzea radium mine (AV) exploited ore and U-bearing minerals, such as autunite and torbernite. The mine was exploited underground from 1911 to 1922, closed in 1946 without restoration, and actually a commercial area is deployed. Stream sediments, soils and water samples were collected between 2008 and 2009. Stream sediments are mainly contaminated in As, Th, U and W, which is related to the AV radium mine. The PTEs, As, Co, Cr, Sr, Th, U, W, Zn, and electrical conductivity reached the highest values in soils collected inside the mine influence...
March 25, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28342154/aluminum-fractionation-in-acidic-soils-and-river-sediments-in-the-upper-mero-basin-galicia-nw-spain
#14
L Palleiro, C Patinha, M L Rodríguez-Blanco, M M Taboada-Castro, M T Taboada-Castro
This study aims to determine aluminum fractions in the fine earth of acidic soils under different land uses (forest, pasture and cultivation) and in the river bed sediments of the headwater of the Mero River in order to identify and quantify Al-bearing phases to assess Al mobility and potential bioavailability (environmental availability) in the monitoring area. Sequential extraction is used to evaluate the Al partitioning into six fractions operationally defined: soluble/exchangeable/specifically adsorbed, bound to manganese oxides, associated with amorphous compounds, aluminum bound to oxidizable organic matter, associated with crystalline iron oxides, and residual fraction (aluminum within the crystal lattices of minerals)...
March 24, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28337622/harnessing-fertilizer-potential-of-human-urine-in-a-mesocosm-system-a-novel-test-case-for-linking-the-loop-between-sanitation-and-aquaculture
#15
Sukanta Rana, Jayanta Kumar Biswas, Jörg Rinklebe, Erik Meers, Nanthi Bolan
Human urine (HU) is a biogenic fertilizer which has raised immense interest owing to its capacity of combining sanitation and nutrient recovery. In search of an alternative organic fertilizer for fish culture, the nutrient potential of HU was evaluated. Fries of Indian carps and larvae of freshwater prawn were reared for 120 days under six conditions: (a) aerated and (b) non-aerated fresh HU (0.01%), (c) cattle manure (CM; 1.8 kg tank(-1)), mixed treatment with CM and HU under (d) iso-phosphorus and (e) iso-nitrogenous condition and (f) control...
March 23, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28337621/metal-contaminated-potato-crops-and-potential-human-health-risk-in-bolivian-mining-highlands
#16
Alan E Garrido, William H J Strosnider, Robin Taylor Wilson, Janette Condori, Robert W Nairn
This study assessed metals in irrigation water, soil and potato crops impacted by mining discharges, as well as potential human health risk in the high desert near the historic mining center of Potosí, Bolivia. Metal concentrations were compared with international concentration limit guidelines. In addition, an ingested average daily dose and minimum risk level were used to determine the hazard quotient from potato consumption for adults and children. Irrigation water maximum concentrations of Cd, Pb and Zn in mining-impacted sites were elevated 20- to 1100-fold above international concentration limit guidelines...
March 23, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28337620/date-palm-waste-derived-biochar-composites-with-silica-and-zeolite-synthesis-characterization-and-implication-for-carbon-stability-and-recalcitrant-potential
#17
Munir Ahmad, Mahtab Ahmad, Adel R A Usman, Abdullah S Al-Faraj, Adel Abduljabbar, Yong Sik Ok, Mohammad I Al-Wabel
Engineered organo-mineral composites were synthesized from date palm waste biochar and silica or zeolite via mechanochemical treatments. Date palm tree rachis (leaves) waste biomass was pre-treated with silica or zeolite minerals via ball milling and sonication prior to pyrolysis at 600 °C. The resultant organo-mineral composites and pristine materials were characterized using X-ray diffraction, thermogravimetric-differential thermal (TG-DTA), Fourier transform infrared, scanning electron microscope analyses and surface area and porosity analyzer to investigate the variations in physiochemical and structural characteristics...
March 23, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28332174/effects-of-carbon-nanotube-and-biochar-on-bioavailability-of-pb-cu-and-sb-in-multi-metal-contaminated-soil
#18
Meththika Vithanage, Indika Herath, Yaser A Almaroai, Anushka Upamali Rajapaksha, Longbin Huang, Jwa-Kyung Sung, Sang Soo Lee, Yong Sik Ok
This study examined the effects of carbon nanotube and biochar on the bioavailability of Pb, Cu and Sb in the shooting range soils for developing low-cost remediation technology. Commercially available multi-walled carbon nanotube (MWCNT) and biochar pyrolyzed from soybean stover at 300 °C (BC) at 0.5, 1 and 2.5% (w w(-1)) were used to remediate the contaminated soil in an incubation experiment. Both DTPA (bioavailable) and TCLP (leaching) extraction procedures were used to compare the metal/loid availability and leaching by the amendments in soil...
March 22, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28332173/combined-ultrasound-with-fenton-treatment-for-the-degradation-of-carcinogenic-polycyclic-aromatic-hydrocarbons-in-textile-dying-sludge
#19
Jian-Hao Zhang, Hai-Yuan Zou, Xun-An Ning, Mei-Qing Lin, Chang-Min Chen, Tai-Cheng An, Jian Sun
To develop an effective method to remove the toxic and carcinogenic polycyclic aromatic hydrocarbons (CPAHs) from textile dyeing sludge, five CPAHs were selected to investigate the degradation efficiencies using ultrasound combined with Fenton process (US/Fenton). The results showed that the synergistic effect of the US/Fenton process on the degradation of CPAHs in textile dyeing sludge was significant with the synergy degree of 30.4. During the US/Fenton process, low ultrasonic density showed significant advantage in degrading the CPAHs in textile dyeing sludge...
March 22, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28315117/the-evolution-of-pollution-profile-and-health-risk-assessment-for-three-groups-svocs-pollutants-along-with-beijiang-river-china
#20
Jiao Tang, Taicheng An, Jukun Xiong, Guiying Li
Three important groups of semi-volatile organic compounds (SVOCs), polycyclic aromatic hydrocarbons (PAHs), organic chlorinated pesticides (OCPs) and phthalate esters (PAEs), were produced by various human activities and entered the water body. In this study, the pollution profiles of three species including 16 PAHs, 20 OCPs and 15 PAEs in water along the Beijiang River, China were investigated. The concentrations of Σ16PAHs in the dissolved and particulate phases were obtained as 69-1.5 × 10(2) ng L(-1) and 2...
March 17, 2017: Environmental Geochemistry and Health
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