用新型絮凝剂处理制浆漂白废水

采用一种新型的有机无机复合型高分子絮凝剂(F-1)处理制浆漂白废水，进行了絮凝条件的优选试验和对比试验，结果表明：F-1絮凝剂的絮凝沉降效果与絮凝剂的用量、废水的pH有很大的关系。当废水的pH为6．0、絮凝剂用量为100mg／L时，漂白废水的色度、SS和COD的去除率分别为98．2％、93．6％和78．6％。而且，其絮凝性能明显优于阳离子聚丙烯酰胺(PAMC)、聚合氯化铝(PAC)以及聚合硫酸铁(PFS)等絮凝剂。     

安全管理信息系统发展探讨

阐述了安全管理信息系统中安全，管理，信息，系统之间的密切关系。以构建1个有效管理安全信息为目标，从安全信息的界定，安全信息的分类。安全信息的管理绩效等方面进行了分析。对安全管理信息系统的产生背景，目的意义。构建步骤进行了较详细的探讨，为开发基于Internet企业安全信息共享和安全生产管理决策支持系统奠定了基础。     

Estimation of runoff and sediment yield in the Redrock Creek watershed using AnnAGNPS and GIS

Sediment has been identified as a significant threat to water quality and channel clogging that in turn may lead to river flooding. With the increasing awareness of the impairment from sediment to water bodies in a watershed, identifying the locations of the major sediment sources and reducing the sediment through management practices will be important for an effective watershed management. The annualized agricultural non-point sourcepollution(AnnAGNPS) model and newly developed GIS interface for it were applied in a small agricultural watershed, Redrock Creek watershed, Kansas, in this pilot study for exploring the effectiveness of using this model as a management tool. The calibrated model appropriately simulated monthly runoff and sediment yield through the practices in this study and potentially suggested the ways of sediment reduction through evaluating the changes of land use and field operation in the model for the purpose of watershed management.     

漫话古代防汛抗洪

<正>我国幅员辽阔,每年夏季,南方大部分省区普降大到暴雨,时间长、强度大、范围广,致使一些地方江河水位猛涨,山洪暴发,农作物大面积受淹,企业生产受损,基础设施被毁,群众生活受困。为把灾情减小到最低程度,保护人民生命财产安全,维护社会稳定,各级政府建立了抗洪救灾应急预案。     

Physiological and biochemical responses of <Emphasis Type="Italic">Machilus ichangensis</Emphasis> Rehd. et Wils and <Emphasis Type="Italic">Taxus chinensis</Emphasis> (Pilger) Rehd. to elevated O<Subscript>3</Subscript> in subtropical China

Considerable researches have documented the negative effects of ozone on woody species in North America and Europe; however, little is known about how woody tree species respond to elevated O₃ in subtropical China, and most of the previous studies were conducted using pot experiment. In the present study, Machilus ichangensis Rehd. et Wils (M. ichangensis) and Taxus chinensis (Pilger) Rehd. (T. chinensis), evergreen tree species in subtropical China, were exposed to non-filtered air (NF), 100 nmol mol^?1 O₃ (E1) and 150 nmol mol^?1 O₃ (E2), in open-top chambers under field conditions from 21st March to 2nd November 2015. In this study, O₃ fumigation significantly reduced net photosynthesis rate (Pn) in M. ichangensis in the three measurements and in T. chinensis in the last measurement. Also, non-stomatal factors should be primarily responsible for the decreased Pn. O₃ fumigation-induced increase in malondialdehyde, superoxide dismutase, and reduced ascorbic acid levels indicated that antioxidant defense mechanism had been stimulated to prevent O₃ stress and repair the oxidative damage. Yet, the increase of antioxidant ability was not enough to counteract the harm of O₃ fumigation. Because of the decrease in CO₂ assimilation, the growth of the two tree species was restrained ultimately. The sensitivity of the two tree species to O₃ can be determined: M. ichangensis > T. chinensis. It suggests a close link between the rising O₃ concentrations and the health risk of some tree species in subtropics in the near future.     

苏丹红Ⅰ对小鼠卵巢的损伤作用及对Caspase-3和Ki-67表达的影响

苏丹红是一种人工合成偶氮染料,可引起肝脏及泌尿系统等多个脏器的肿瘤,但苏丹红对生殖系统的毒性研究较少.本研究以昆明小鼠为受试对象,探讨苏丹红Ⅰ对小鼠卵巢组织Caspase-3和Ki-67表达的影响.将24只昆明小鼠随机分为:对照组、低剂量(60 mg· kg-1)、中剂量(120 mg·kg-1)、高剂量(240 mg· kg-1)4组,6只/组.胃灌4周,4周末处死.HE染色观察各组卵巢组织病理变化,免疫组化法检测卵巢组织Caspase-3和Ki-67表达,Real time PCR检测卵巢组织Caspase-3和Ki-67 mRNA表达,Western blotting检测卵巢组织中Ki-67及Caspase-3蛋白表达.与对照组比较,实验组卵巢中Caspase-3阳性细胞率显著升高(Jp＜O.05),而Ki-67阳性细胞率显著降低(P＜0.05),Real time PCR及Western blotting结果与免疫组化法结果一致.本实验发现苏丹红染毒后颗粒细胞的Caspase-3表达增加,且Caspase-3表达呈剂量依赖性,但Ki-67表达受到抑制.     

Hg(Ⅱ)和Pb(Ⅱ)对海洋单细胞藻的急性毒性效应

近年来,海洋重金属污染日益严重,为考察重金属对海洋藻类的生物毒性效应,进而评估其对海洋生态环境的影响,本研究采用一次性培养的实验方法,测定了2种重金属Hg(Ⅱ)和Pb(Ⅱ)对8种海洋单细胞藻的急性毒性效应,包括赤潮异弯藻(Heterosigma akashiwo Hada)、旋链角毛藻(Chaetoceros curv...     

沉淀硫酸钡工业清洁生产及污染防治研究

沉淀硫酸钡项目属于基础无机盐化工类项目,由重晶石矿经过煅烧还原、化合、固液分离、干燥、粉磨等工序得到沉淀硫酸钡产品,生产过程中排放出大量的污染物,包括废气、废水、固体废物、噪声等.在总结该类项目的环保实践经验的基础上,分析了硫酸钡工业的各种污染物的产生情况,并提出了清洁生产及污染防治对策.     

防护装备检测实验室仪器设备的管理

本文阐述了防护装备检测实验室仪器设备的管理程序,从仪器设备配置策划、流转管理、维护和保养等方面进行详细论述,提出仪器设备管理的建议及思路.     

离子色谱法测定碳酸锶产品中的氯杂质

讨论了在单柱离子色谱仪上用ＴＳＫｇｅｌＩＣ－Ａｎｉｏｎ－ＳＥ柱为分离柱,１ｍｍｏｌ／Ｌ邻苯二到（ＰＨ５．４）作流动相,以电导检测器检测,测定沸水提取碳酸锶产品中的杂质氯的方法。该法简便、快速、准确、无干扰,在测定范围内有良好的线性。最小检出量为０．１μｇ,ＩＣ法与比色法的测定结果基本一致,ＣＩ＾－的含量为０．１６６％,相对标准偏差为２．８％,回收率为９７．９％～１００％。