Dissipation behavior and risk assessment of butralin in soybean and soil under field conditions

Dissipation behavior, final residue, and risk assessment of butralin in soybean, green soybean, plant, and soil were investigated. Butralin residues were extracted with acetonitrile and then soybean samples were detected with gas chromatography-mass spectrometer (GC-MS) and soil samples were determined with GC with nitrogen phosphorous detector (GC-NPD). The limit of quantification (LOQ) of the method was 0.01 mg/kg for soybean, green soybean, plant, and soil. Average recoveries ranged from 90.4 ~ 98.2% for green soybean, 86.2 ~ 86.6% for soybean, 86.0 ~ 98.8% for plant, and 85.0 ~ 106.8% for soil. The relative standard deviations (RSDs) were 2.0 ~ 7.2% for green soybean, 2.0 ~ 3.0% for soybean, 3.1 ~ 8.1% for plant, and 1.8 ~ 6.6% for soil. Half-lives of butralin in soil samples varied in the range of 11–22 days. At harvest time, final residues of butralin in soybean and green soybean were lower than LOQ. Risk assessment demonstrated that, at recommended dosage and frequency, butralin would not induce significant harm on humans. The study could be used as a quantitative basis for application of butralin on soybean.     

地区发展差异与湖北省可持续发展战略

湖北省的经济发展水平与全国其它地区存在着较大的差异，从全国范围看，湖北省多年一直处在中等偏下的水平，而在长江流域，近年湖北省一下游省市的差距在迅速扩大；在中心地区各省中，湖北则相对领先。     

防震减灾 任重道远

中华人民共和国已经度过了60年光辉岁月，中国大地发生了沧桑巨变；特别是改革开放的30年．给中华民族带来了蓬勃发展的生机：国家走向繁荣昌盛的强国之路，人民实现了安居乐业的梦想。对于从事防震减灾工作的人们来说，我们更是深切地体会到国家的防震减灾事业得到了长足的进展，增强了我国城乡防震减灾的能力。当然，也许有人会问，你们不是说地震预报没有过关吗？唐山地震和汶川地震都没能预报，造成了巨大的损失，     

战略环境评价（SEA）和可持续发展

SEA的作用不仅仅在于将EIA（环境影响评价）扩展到更具战略意义的决策层，它还是迈向可持续发展的关键一步，它有助于从政策到计划、规划吧至最后的项目遵循可持续发展目标，SEA是联系目前正在进行的项目EIA和使人类活动达到维持环境质量这一目标的纽带，文章讨论了SEA开展的必要性，介绍了SEA的2种类型，结合英国开展的实例，论述了“遵循型”SEA的主要内容及其应用前景。     

电渗析法处理低浓度乙酸废液的研究

用电渗析法处理配制的乙酸质量分类为２．５％左右的乙酸水溶液，浓缩液乙酸质量分数达到２０％，稀相出水乙酸质量分数至０．０２％；对影响处理过程的因素进行了探讨。     

An inquiry into the potential of scenario analysis for dealing with uncertainty in strategic environmental assessment in China

Strategic environmental assessment (SEA) inherently needs to address greater levels of uncertainty in the formulation and implementation processes of strategic decisions, compared with project environmental impact assessment. The range of uncertainties includes internal and external factors of the complex system that is concerned in the strategy. Scenario analysis is increasingly being used to cope with uncertainty in SEA. Following a brief introduction of scenarios and scenario analysis, this paper examines the rationale for scenario analysis in SEA in the context of China. The state of the art associated with scenario analysis applied to SEA in China was reviewed through four SEA case analyses. Lessons learned from these cases indicated the word “scenario” appears to be abused and the scenario-based methods appear to be misused due to the lack of understanding of an uncertain future and scenario analysis. However, good experiences were also drawn on, regarding how to integrate scenario analysis into the SEA process in China, how to cope with driving forces including uncertainties, how to combine qualitative scenario storylines with quantitative impact predictions, and how to conduct assessments and propose recommendations based on scenarios. Additionally, the ways to improve the application of this tool in SEA were suggested. We concluded by calling for further methodological research on this issue and more practices.     

黑碳对土壤和沉积物中菲的吸附解吸行为及生物可利用性的影响

利用淡水单孔蚓Monopylephorus limosus的生物富集实验,研究了黑碳对土壤和沉积物中多环芳烃类有机化合物菲生物可利用性的影响,同时研究了黑碳对菲吸附和解吸行为的影响,并用"双元平衡解吸(DED)模型"对解吸行为进行了预测.结果表明,土壤和沉积物中黑碳的存在直接导致了菲在颤蚓体内的生物累积因子(BSAF)的降低,其原因在于菲在黑碳沉积物样品中的不可逆吸附程度的显著增强.研究发现,土壤和沉积物中菲的生物可利用性与土壤和沉积物中菲的吸附相浓度无关而与孔隙水浓度密切相关.