“赛力奇”的致突变性研究

选用Ａｍｅｓ试验、小鼠骨髓细胞微核实验和小鼠显性致死突变试验对新型食品添加剂“赛力奇”的致突变性进行了检验。结果表明：三项试验的结果均生。根据国家《食品安全性毒理学评价程序（试行）》的规定，认为“赛力奇”无致突变性。     

铁蓝—活性炭生物膜法处理彩色胶片水洗废水的研究

定影漂白废话水用铁蓝法预处理，结果表明，以硫酸亚铁为沉淀剂，投加量为铁氰化物理论值的１．３倍，ＣＮ去除率为９８％，反应生成的普鲁士蓝纯度较高，可供综合利用，铁蓝法除ＣＮ后的出水与显影冲洗废水混合，再经生炭生物膜法处理，ＣＯＤｃｒ去除率为８０％；     

Eco-environmental information system of Tianjin City─Design, implementation and applications

Ｅｃｏ－ｅｎｖｉｒｏｎｍｅｎｔａｌｉｎｆｏｒｍａｔｉｏｎｓｙｓｔｅｍｏｆＴｉａｎｊｉｎＣｉｔｙ─Ｄｅｓｉｇｎ，ｉｍｐｌｅｍｅｎｔａｔｉｏｎａｎｄａｐｐｌｉｃａｔｉｏｎｓＨｕＸｉａｏｌｉｎ；ＹａｎｇＢａｎｇｊｉｅ；ＺｏｎｇＹａｏｇｕａｎｇ；ＬｕＬｉ（Ｒ...     

铁路专用线声环境影响评价

针对新建铁路专用线沿线的环境特征，提出了铁路专用线声环境影响评价的程序、内容和方法。在目前缺乏新建铁路噪声预测模式的情况下，提出了应对铁路边界噪声、不同距离处的铁路噪声、敏感点噪声、鸣笛噪声进行预测，并以某铁路专用线声环境影响评价为例，对上述四种噪声进行了预测，通过预测得到铁路两侧的声环境状况，并以此为依据提出了铁路噪声的防治对策，以保证铁路专用线沿线声环境质量。     

生存环境与物种生命的演化

达尔文进化论的缺环就是连续性。相同自然条件下，动物进化的机遇和概率是相等的。进化就是物种在新环境中所做的一系列适应改变。当一个物种减少至某一极限数量时必将走向灭绝。     

公路环境评价发展现状及对策初探

“八五”、“九五”期间，中国公路建设事业得到了迅速的发展，与此同时公路建设项目的环境影响评价也得到了相应的发展，初步形成了一套较为完善的环境评价体系，但同时也存在着法规，技术、规范体系比较落后，评价仅局限在环境影响评价层次，人员素质不高等问题，因此需从完善公路环境评价体系，完善公路环境法规及技术规范体系，积极探索新技术与新方法，加强佬培训等方面进一步完善公路环境评价。     

过氧化氢催化氧化难降解废水的研究

文章以过氧化氢为氧化剂,以γ-Al2O3为载体采用浸渍法制得不同金属含量的九种催化剂进行催化氧化实验,并优选出以5.0%Co、2.5?(质量百分含量)催化剂CODcr去除率较好,并确定此催化剂在常温常压下,反应时间为30 min,pH=6,氧化剂用量为30g/L时,CODcr的去除率最高为83%,这样不仅提高了BOD5/CODcr值,而且有利于后续生化处理,减轻后续处理装置负荷.     

常压塔塔顶腐蚀关键参量相关性分析与预测

预测常压塔顶回流罐切水的关键离子浓度可以为常压塔顶系统工艺防腐提供技术指导。收集了某炼厂2014-2016年常压装置的生产实时工艺参数、原料及产品采样数据、水质分析化验参数,采用线性插值方法对不同时间尺度的数据进行补全。通过线性相关性分析获得了影响常压塔顶回流罐切水总铁离子浓度、pH的主要因素,并基于深度学习、支持向量机回归、粒子群优化方法建立了腐蚀关键参量预测模型。结果表明,pH值和总铁离子浓度的相关因素大部分重叠,与原料性质及产品馏出温度较强相关;建立的回归模型预测精度高,在训练集和预测集上,总铁离子浓度预测值与测量值最大偏差分别为4. 4%和9. 8%,pH值预测值与测量值最大偏差分别为0. 9%和1. 1%。     

Insights into reactive oxygen species formation induced by water-soluble organic compounds and transition metals using spectroscopic method

Ambient particulate matter (PM) can cause adverse health effects via their ability to produce Reactive Oxygen Species (ROS). Water-Soluble Organic Compounds (WSOCs), a complex mixture of organic compounds which usually coexist with Transition Metals (TMs) in PM, have been found to contribute to ROS formation. However, the interaction between WSOCs and TMs and its effect on ROS generation are still unknown. In this study, we examined the ROS concentrations of V, Zn, Suwannee River Fulvic Acid (SRFA), Suwannee River Humic Acid (SRHA) and the mixtures of V/Zn and SRFA/SRHA by using a cell-free 2′,7′-Dichlorodihydrofluorescein (DCFH) assay. The results showed that V or Zn synergistically promoted ROS generated by SRFA, but had an antagonistic effect on ROS generated by SRHA. Fluorescence quenching experiments indicated that V and Zn were more prone to form stable complexes with aromatic humic acid-like component (C1) and fulvic acid-like component (C3) in SRFA and SRHA. Results suggested that the underlying mechanism involving the fulvic acid-like component in SRFA more tending to complex with TMs to facilitate ROS generation through π electron transfer. Our work showed that the complexing ability and complexing stability of atmospheric PM organics with metals could significantly affect ROS generation. It is recommended that the research deploying multiple analytical methods to quantify the impact of PM components on public health and environment is needed in the future.     

Detecting forest landcape boundary between Mountain Birch and evergreen eoniferous forest in the northern slope of Changbai Mountain

Boundaries between different forest types in Changbai Mountain Eatern China are results from complex interactions between forest ecosystems,topogrphy,and geomorphology.Detecting and quantifying the transitional zones are highly important since high environmental beterogeneity and biodiversity are ofter found within these zpmes.In this study,we used GIS and multivariate statistics techniques(PCA and MSWA) to analyze data from Landsat TM satellite imageries and quantitatively determined the positions and widths of the landscape boundary betweeen mountain birch and evergreen coniferous forests in the northern slope of Changbai Mountain.The results showed that the widths of the landscape boundary ranges from 30-50 m while using the MWW A or/and PC method.Such detected widths are consistent with field transect data that suggest a 50m tranistional zone width.The results further suggest that TM data can be used in combination with GIS and statistical techniques in determining forest landscape boundaries.MSWA is more reliable than PCA,while PCA can also be used to determine the landscape boundary when transects are properly located.