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71.
Chronic exposure of arsenic via drinking water and its adverse health impacts on humans 总被引:1,自引:0,他引:1
Mohammad Mahmudur Rahman Jack C. Ng Ravi Naidu 《Environmental geochemistry and health》2009,31(Z1):189-200
Worldwide chronic arsenic (As) toxicity has become a human health threat. Arsenic exposure to humans mainly occurs from the
ingestion of As contaminated water and food. This communication presents a review of current research conducted on the adverse
health effects on humans exposed to As-contaminated water. Chronic exposure of As via drinking water causes various types
of skin lesions such as melanosis, leucomelanosis, and keratosis. Other manifestations include neurological effects, obstetric
problems, high blood pressure, diabetes mellitus, diseases of the respiratory system and of blood vessels including cardiovascular,
and cancers typically involving the skin, lung, and bladder. The skin seems to be quite susceptible to the effects of As.
Arsenic-induced skin lesions seem to be the most common and initial symptoms of arsenicosis. More systematic studies are needed
to determine the link between As exposure and its related cancer and noncancer end points. 相似文献
72.
Liu Yanju Bello Olanrewaju Rahman Mohammad Mahmudur Dong Zhaomin Islam Shofiqul Naidu Ravi 《Environmental science and pollution research international》2017,24(20):17056-17067
Environmental Science and Pollution Research - Lead (Pb) bioaccessibility measurements have been the subject of much research in recent years, given the desire to develop a cost-effective and... 相似文献
73.
Li Gan Ying Cheng Thavamani Palanisami Zuliang Chen Mallavarapu Megharaj Ravendra Naidu 《Environmental science and pollution research international》2014,21(17):10339-10348
A new strain isolated from activated sludge and identified as Burkholderia vietnamiensis C09V was used to biodegrade crystal violet (CV) from aqueous solution. To understand the degradation pathways of CV, batch experiments showed that the degradation using B. vietnamiensis C09V significantly depended on conditions such as pH, initial dye concentration and media components, carbon and nitrogen sources. Acceleration in the biodegradation of CV was observed in presence of metal ions such as Cd and Mn. More than 98.86C of CV (30 mg l?1) was degraded within 42 h at pH 5 and 30 °C. The biodegradation kinetics of CV corresponded to the pseudo first-order rate model with a rate constant of 0.046 h?1. UV–visible and Fourier transform infrared spectroscopy (FTIR) were used to identify degradation metabolites. Which further confirmed by LC-MS analysis, indicating that CV was biodegraded to N,N-dimethylaminophenol and Michler’s ketone prior to these intermediates being further degraded. Finally, the ability of B. vietnamiensis C09V to remove CV in wastewater was demonstrated. 相似文献
74.
Murtaza G Haynes RJ Kim KR Zia MH Naidu R Belyaeva ON 《Environmental science and pollution research international》2012,19(3):636-645
Purpose
The study examines if a short period of reaction after addition of biosolids to soils can reduce the solubility and potential phytotoxicity of biosolid-borne Zn and Cu. 相似文献75.
76.
Juhasz AL Smith E Weber J Naidu R Rees M Rofe A Kuchel T Sansom L 《Chemosphere》2008,71(11):2180-2186
Arsenic (As) bioavailability in spiked soils aged for up to 12 months was assessed using in vitro and in vivo methodologies. Ageing (natural attenuation) of spiked soils resulted in a decline in in vivo As bioavailability (swine assay) of over 75% in soil A (Red Ferrosol) but had no significant effect on in vivo As bioavailability even after 12 months of ageing in soil B (Brown Chromosol). Sequential fractionation, however, indicated that there was repartitioning of As within the soil fractions extracted during the time course investigated. In soil A, the As fraction associated with the more weakly bound soil fractions decreased while the residual fraction increased from 12% to 35%. In contrast, little repartitioning of As was observed in soil B indicating that natural attenuation may be only applicable for As in soils containing specific mineralogical properties. 相似文献
77.
Juhasz AL Smith E Weber J Rees M Rofe A Kuchel T Sansom L Naidu R 《Chemosphere》2008,71(10):1963-1969
Considerable information is available in the literature regarding the uptake of arsenic (As) from contaminated soil and irrigation water by vegetables. However, few studies have investigated As speciation in these crops while a dearth of information is available on As bioavailability following their consumption. In this study, the concentration and speciation of As in chard, radish, lettuce and mung beans was determined following hydroponic growth of the vegetables using As-contaminated water. In addition, As bioavailability was assessed using an in vivo swine feeding assay. While As concentrations ranged from 3.0 to 84.2mg As kg(-1) (dry weight), only inorganic As (arsenite and arsenate) was detected in the edible portions of the vegetables. When As bioavailability was assessed through monitoring blood plasma As concentrations following swine consumption of As-contaminated vegetables, between 50% and 100% of the administered As dose was absorbed and entered systemic circulation. Arsenic bioavailability decreased in the order mung beans>radish>lettuce=chard. 相似文献
78.
Degradation of fenamiphos in soils collected from different geographical regions: the influence of soil properties and climatic conditions 总被引:1,自引:0,他引:1
Cáceres T Megharaj M Naidu R 《Journal of environmental science and health. Part. B》2008,43(4):314-322
The persistence of fenamiphos (nematicide) in five soils collected from different geographical regions such as Australia, Ecuador and India under three temperature regimes (18, 25 and 37 degrees C) simulating typical environmental conditions was studied. The effect of soil properties (soil pH, temperature and microbial biomass) on the degradation of fenamiphos was determined. The rate of degradation increased with increase in temperature. Fenamiphos degradation was higher at 37 degrees C than at 25 and 18 degrees C (except under alkaline pH). The degradation pathway differed in different soils. Fenamiphos sulfoxide (FSO) was identified as the major degradation product in all the soils. Fenamiphos sulfone (FSO2), and the corresponding phenols: fenamiphos phenol (FP), fenamiphos sulfoxide phenol (FSOP) and fenamiphos sulfone phenol (FSO2P) were also detected. The degradation of fenamiphos was faster in the alkaline soils, followed by neutral and acidic soils. Under sterile conditions, the dissipation of the pesticide was slower than in the non-sterile soils suggesting microbial role in the pesticide degradation. The generation of new knowledge on fenamiphos degradation patterns under different environmental conditions is important to achieve better pesticide risk management. 相似文献
79.
Scott D. Warner Dawit Bekele C. Paul Nathanail Sreeni Chadalavada Ravi Naidu 《补救:环境净化治理成本、技术与工艺杂志》2023,33(3):187-207
The process of designing a remedy for contaminated groundwater historically has not commonly included climate-future, hydrologic, and biogeochemical aquifer characteristics. From experience, the remedy design process also has not consistently nor directly integrated or projected future hydrologic and biogeochemical effects of the human-induced or developed environment—aka the anthropogenic influence—on potential remedy performance. The apparent practice of (1) not regularly assessing anthro-influenced hydrological (termed here as anthrohydrology) or biogeochemical characteristics (collectively hydrobiogeochemistry) of a site and (2) rarely accounting for future climatic shifts as design factors in remedy design may be due, in part, to the general practice-level view that groundwater remediation systems (whether in situ or ex situ) have seldom been anticipated to last more than a few years (or one or two decades at the most). Second, methods to reliably and quantitatively estimate site-specific, climate-future shifts in groundwater conditions using global and/or regional climate models and the resultant impacts on contaminant plume characteristics have not been readily available. The authors here suggest that while the concept of remedy design resilience and durability, within an envelope of climate change and anthropogenic influence, has been discussed in some technical circles as a component of “sustainable remediation,” we have found that direct application of these technical concepts in quantifiable terms remains rare. By incorporating the potential influence of future hydrobiogeochemical scenarios into remedy design, however, the design process could account for reasonable climate-induced influence on the groundwater system for a given site. These scenarios could then be applied within the remedy selection process to assess performance durability under potentially changing hydrologic, biological, and chemical conditions. 相似文献
80.
Truong Dai Quyet Loganathan Paripurnanda Tran Le Minh Vu Duc Loi Nguyen Tien Vinh Vigneswaran Saravanamuthu Naidu Gayathri 《Environmental science and pollution research international》2022,29(12):16959-16972
Environmental Science and Pollution Research - Ammonium removal from drinking water to protect human and environmental health is one of the major global concerns. This study evaluates the... 相似文献