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| 1 | Showering in Flint, MI: Is there a DBP problem?显示文摘Lead contamination in the City of Flint, MI has been well documented over the past two years, with lead levels above the EPA Action Level until summer 2016. This resulted from an ill-fated decision to switch from Detroit water(Lake Huron) with corrosion control, to Flint River water without corrosion control. Although lead levels are now closer to normal,reports of skin rashes have sparked questions surrounding tap water in some Flint homes.This study investigated the presence of contaminants, including disinfection by-products(DBPs), in the hot tap water used for showering in the homes of residents in Flint. Extensive quantitative analysis of 61 regulated and priority unregulated DBPs was conducted in Flint hot and cold tap water, along with the analysis of 50 volatile organic compounds and a nontarget comprehensive, broadscreen analysis, to identify a possible source for the reported skin rashes. For comparison, chlorinated hot and cold waters from three other cities were also sampled, including Detroit, which also uses Lake Huron as its source water.Results showed that hot water samples generally contained elevated levels of regulated and priority unregulated DBPs compared to cold water samples, but trihalomethanes were still within regulatory limits. Overall, hot shower water from Flint was similar to waters sampled from the three other cities and did not have unusually high levels of DBPs or other organic chemicals that could be responsible for the skin rashes observed by residents. It is possible that an inorganic chemical or microbial contaminant may be responsible. | Joshua M.Allen Amy A.Cuthbertson Hannah K.Liberatore Susana Y.Kimura Anurag Mantha Marc A.Edwards Susan D.Richardson | 2017 | Journal of Environmental Sciences2017，29，8： | 5 |
| 2 | Policy management using access control spaces显示文摘 | T.Jaeger X.Zhang A.Edwards | | 0，，03： | 1 |
| 3 | Prospective evaluation of 6895 groin hernia repairs in women显示文摘 | A.Koch A.Edwards S.Haapaniemi P.Nordin A.Kald | 2005 | Br J Surg2005，，12： | 1 |
| 4 | 农药与生态系统显示文摘美国每年生产50万吨农药用于农业生态系统的虫害、植物病原菌和杂草的防治。实际上,只有1%的农药能杀伤目标生物,绝大部分农药都到达农业生态系统的非目标地区,或以化学污染物扩散到周围的生态系统。农药对环境影响的研究大多集中在非目标物种种群,以及对土地。 | David Pimentel Clive A.Edwards 孙顺江 | 1984 | 环境科学研究1984，，3： | 0 |
| 5 | Single-entity electrochemistry at confined sensing interfaces显示文摘Measurements at the single-entity level provide more precise diagnosis and understanding of basic biological and chemical processes.Recent advances in the chemical measurement provide a means for ultra-sensitive analysis.Confining the single analyte and electrons near the sensing interface can greatly enhance the sensitivity and selectivity.In this review,we summarize the recent progress in single-entity electrochemistry of single molecules,single particles,single cells and even brain analysis.The benefits of confining these entities to a compatible size sensing interface are exemplified.Finally,the opportunities and challenges of single entity electrochemistry are addressed. | Yi-Lun Ying Jiajun Wang Anna Rose Leach Ying Jiang Rui Gao Cong Xu Martin A.Edwards Andrew D.Pendergast Hang Ren Connor K.Terry Weatherly Wei Wang Paolo Actis Lanqun Mao Henry S.White Yi-Tao Long | 2020 | Science China Chemistry2020，63，5： | 0 |
| 6 | Understanding the initial use stage of cement mortar lining in drinking water distribution systems:Silicon and aluminum as stability indicators显示文摘The cement mortar lining(CML)of commonly used ductile iron pipes can severely deteriorate the drinking water quality at the initial stage of use,but the behavioral characteristics of different elements release from the CML in this stage is still unclear.In this study,dynamic immersion experiments with new cement mortar lined ductile iron pipe reactors were conducted under different feed water hardness and alkalinity conditions.The results showed that the release of alkaline substances from the CML at the initial stage of use could strongly influence the pH of water,which consequently greatly impacted the release/precipitation behaviors of calcium,aluminum and silicon.The pH and aluminum concentration of the effluent water could reach 11.5 and 700μg/L within 24 hr of hydraulic retention time,respectively,under conditions of relatively lower hardness and alkalinity.Due to the pH elevation,calcium carbonate precipitation could occur even at much lower feed water alkalinity.Whereas the aluminum and silicon could keep release from the CML in soluble form at different hardness and alkalinity levels,and their release rate depended on the amount of calcium carbonate precipitation.Thus,aluminum and silicon were more suitable as indicators of the corrosion intensity at the initial stage of CML use rather than the traditional calcium carbonate precipitation potential.Appropriate feed water hardness and alkalinity levels for mitigating the initial intense corrosion of CML were proposed:hardness>40 mg/L(CaCO_(3)),alkalinity>100 mg/L(CaCO_(3)). | Qiaozhi Liu Yuan Zhuang Guiwei Li Yao Zhang Marc A.Edwards Baoyou Shi | 2024 | Journal of Environmental Sciences2024，，1： | 0 |
| 7 | 新一代油藏模拟技术显示文摘复杂的地质情况、高昂的资源开发成本促使油藏模拟技术不断发展。新一代油藏模拟软件采用数百万个非结构化网格模型模拟渗透率差异较大的地质构造。通过采用更加接近实际情况的模型。新型模拟软件有助于提高新老油田的最终采收率。 | David A.Edwards Dayal Gunasekera Paul A.Fjerstad Jessica Franco Viet Hoang Lisette Quettier | 2014 | 石油工业计算机应用2014，，1： | 0 |
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