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981.
Spatial variations of human health risk associated with exposure to chlorination by-products occurring in drinking water 总被引:1,自引:0,他引:1
Legay C Rodriguez MJ Sadiq R Sérodes JB Levallois P Proulx F 《Journal of environmental management》2011,92(3):892-901
During disinfection, chlorine reacts with organic matter present in drinking water and forms various undesirable chlorinated by-products (CBPs). This paper describes a study of the spatial variability of human health risk (i.e., cancer effects) from CBP exposure through drinking water in a specific region. The region under study involves nine drinking water distribution systems divided into several zones based on their characteristics. The spatial distribution of cancer risk (CR) was estimated using two years of data (2006-2008) on various CBP species. In this analysis, trihalomethanes (THMs) and haloacetic acids (HAAs) served as surrogates for CBPs. Three possible routes of exposure (i.e., via ingestion, inhalation and dermal contact) were considered for each selected compound. The cancer risk assessment involved estimating a unit risk (R(T)) in each zone of the selected distribution systems. A probabilistic analysis based on Monte Carlo simulations was employed. Risk assessment results showed that cancer risk varied between systems, but also within individual systems. As a result, the population of the same region was not exposed to the same risk associated with CBPs in drinking water. Unacceptable levels (i.e., R(T) > 10(-4)) for the estimated CR were determined for several zones in the studied region. This study demonstrates that a spatial-based analysis performed to represent the spatial distribution of risk estimates can be helpful in identifying suitable risk management strategies. Suggestions for improving the risk analysis procedure are also presented. 相似文献
982.
<正>Cadmium (Cd) is a toxic metal with high mobility from soil and known translocation into plants (Song et al., 2015).Because the main source of human exposure to Cd is from food consumption, there has been increased research examining Cd uptake in agricultural plants (Li et al., 2014; Rizwan et al., 2016; Song et al., 2015). Rice (Oryza sativa L.) has been identified as a major crop that contains relatively high 相似文献
983.
Hipolito Victor Leibnitz Amorim Vanessa Amorim Gleize Philippe Jean Paul Girotto Edivandro Jnior Amrico Cruz Benavides Roberto Sanchez Saul da Silva Luciano Magnago Rachel Faverzani 《Journal of Material Cycles and Waste Management》2022,24(2):452-465
Journal of Material Cycles and Waste Management - In this article, we present the results of the composite development obtained from polyurethane (PU), polyvinyl chloride (PVC), and aluminum... 相似文献
984.
Pham Ha T. T. Nguyen Ly N. Le Thuy T. Le Mai Q. Tran Toan K. 《Environmental science and pollution research international》2022,29(28):42090-42101
Environmental Science and Pollution Research - Over the past decade, the extent and magnitude of acid rain in Vietnam and other Asian countries have become more apparent. In this study, the effect... 相似文献
985.
Dang Tran Ngoc Vy Nguyen Thi Tuong Thuong Do Thi Hoai Phung Dung Van Dung Do Le An Pham 《Environmental science and pollution research international》2022,29(39):59094-59103
Environmental Science and Pollution Research - Vietnam is highly vulnerable to climate change-related extreme weather events such as heatwaves. This study assesses the association between heatwaves... 相似文献
986.
Ouédraogo Frédéric Cornu Jean-Yves Janot Noémie Nguyen Christophe Sourzac Mahaut Parlanti Edith Denaix Laurence 《Environmental science and pollution research international》2022,29(20):29268-29284
Environmental Science and Pollution Research - Accumulation of copper (Cu) in soils due to the application of fungicides may be toxic for organisms and hence affect winegrowing sustainability. Soil... 相似文献
987.
Hoang Anh Quoc Le Thuy Minh Nguyen Ha My Nu Le Huong Quang Vu Nam Duc Chu Ngoc Chau Dang Giang Huong Minh Minh Tu Binh Takahashi Shin Tran Tri Manh 《Environmental science and pollution research international》2022,29(10):14046-14057
Environmental Science and Pollution Research - The occurrence of nine phthalic acid esters (PAEs) were determined in indoor dust samples collected from vehicle repair shops, waste processing... 相似文献
988.
明确气候变化背景下生态脆弱区土壤呼吸速率特征和土壤温湿度对其影响,对准确评估和预知该区碳收支具有重要意义.以陕北黄土丘陵区自然撂荒地22 a柠条人工纯林为研究对象,通过CO2分析仪和温湿度传感器测定不同土层(10、50和100 cm) CO2浓度平均值和土壤温湿度,采用Fick第一扩散系数法计算土壤呼吸速率,探究不同土层土壤温度、土壤湿度和土壤呼吸速率的动态变化特征,并进一步分析不同土层土壤呼吸速率对土壤温湿度的响应.结果表明,土壤呼吸速率日变化随土层深度增加显著降低(P<0.05),峰值出现时间存在滞后现象,相邻土层间(10、50和100 cm)土壤呼吸速率由上至下均滞后1 h;6~9月土壤呼吸速率月变化为多峰曲线,其中10、50和100 cm土层土壤呼吸速率最大值分别在7月25日、8月6日和8月10日,达13.96、2.96和1.47 μmol ·(m2 ·s)-1;土壤温度对土壤呼吸速率影响随土层深度增加而减弱,50 cm及以下土层土壤温度对土壤呼吸速率无显著影响(P>0.05),10 cm土层指数拟合最优,R2=0.96,50 cm和100 cm土层拟合较差,R2分别为0.00和0.01,温度敏感系数Q10随土层深度增加而减小;不同土层土壤湿度对土壤呼吸速率影响均显著(P<0.05),二次拟合表现为50 cm (R2=0.35)>10 cm (R2=0.22)>100 cm (R2=0.31);10、50和100 cm土层土壤温度与土壤湿度的综合作用可解释土壤呼吸速率的96%、6%~50%和22%~24%.综上所述,黄土丘陵区柠条人工纯林不同深度土壤温湿度对土壤呼吸速率影响存在差异,10 cm土层土壤呼吸速率受土壤温湿度的综合影响,但土壤温度的相对贡献更高,50 cm土层及以下土壤湿度为关键因子.研究结果有助于更好地预测未来气候变化对该区陆地生态系统碳循环影响,为温室气体调控提供理论依据. 相似文献
989.
M. Correa J.M. Laza J.L. Vilas E. Bilbao M. Rodríguez L.M. León 《Waste management (New York, N.Y.)》2010,30(11):2305-2311
We report on the possibility of obtaining organic polymeric matrixes allowing the development of new high performance fire-resistant products by recycling downsized thermostable waste materials. Phenolic resins have been used as binders for recycled waste. Furthermore, considering that reinforced plastic triturations have superior properties (chemical, mechanical, water resistance, etc.) to wood agglomerates, significant advantages over conventional materials are anticipated. In summary, we propose a viable solution to some of the known problems caused by the consumption of wood and to the needs of strengthened plastic processing engineering. Using resins as a binder, several fire-resistant prototypes were prepared from polyester waste, and their mechanical properties, thermal stability, and fire-resistant properties were analyzed. 相似文献
990.