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

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微波密封消解法快速测定总磷

对微波密封消解法测定总磷进行了研究．实验结果表明：该法操作简单、消解时间短，准确度高，精密度好，值得普及和推广．     

任意风向时的线源扩散模式研究

给出了一个适用于风向与公路成任意夹角的有限长线源的扩散模式;讨论了不同风向、线源长度等,对线源中心下风距离的污染物地面浓度的影响;并将这个模式与CALINE-2模式和风洞试验结果进行了比较。     

电子商务教学中应注重联系生活培养学生能力

本文主要介绍在电子商务教学过程中如何使教学更贴近生活实际,培养学生解决实际问题和学习的能力。知识经济是创新型经济,教育自身要有创新型观念的运作方式,培养有知识、有创新技术和攻坚能力的人才,以及这些人才渴望知识、终生学习的意识。     

加强能力培养, 提高专业水平——论环境类中专的教学改革

介绍了环境保护中专办学２０年来所取得的成绩及其为环保事业的发展做出的积极贡献，并指出存在的问题．为适应环保事业发展的需要，对环保中专在专业设置、课程设置、教学计划和教材建设方面，均提出改革意见     

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。     

甲基汞神经毒性检测和评价效应指标--即刻早期基因研究

论述了甲基汞神经毒性研究现状，通过分析即刻早期基因（IEG）在甲基汞神经毒性机制中的作用，得出即刻早期基因能作为甲基汞神经毒性检测和评价的效应指标，同时也简要介绍即刻早期基因的研究方法，并指出利用基因芯片技术能够被步筛选出甲基汞对大鼠脑基因表达影响的相关基因。     

热带海洋环境中BHC和DDT的行为特征研究Ⅰ.中国珠江口区旱季BHC和DDT的含量与分布

本文于1994年11月用气相色谱法研究了旱季珠江口区环境中BHC和DDT的含量与分布。结果表明，表层海水BHC含量为0.187μg/L，DDT为0.080μｇ/L；底层海水BHC为0.117μｇ／L，DDT为0.506μｇ／L。沉积物BHC为11.15×10－9（干），DDT为33.46×10－9（干）。海水中的盐度、DO、C     

水解酸化—厌氧工艺处理高浓度抗生素废水研究

研究了水解酸化与厌氧消化组合工艺处理高浓度抗生素废水,结果表明,水解酸化反应器最大CODcr容积负荷达到 16.84kg/m3·d,复合厌氧反应器CODcr容积负荷达到8.57kg/m3·d;系统进水SO42-浓度为1325mg/L,CODcr/SO42-值最低达到 3;CODCr与SO42-总去除率分别为75.5％和95.2％,对各种抑制物质和冲击负荷表现出很好的适应性。     

Effectiveness evaluation of water-sprinkling in controlling urban fugitive road dust based on TRAKER method: A case study in Baoding, China

Fugitive road dust (FRD) contributes a great deal to urban rainwater and air pollution and is commonly controlled by water-sprinkling in most Chinese cities. However, there is a lack of information on its effectiveness. We used the Testing Re-entrained Aerosol Kinetic Emissions from Roads (TRAKER) method to monitor different types of roads in Baoding city before and within 1 hr after water-sprinkling and obtained the road dirtiness index (a) and PM concentration in the road environment ($T_{\mathrm{T}}^{*}$), to evaluate the removal efficiency for PM deposited on the road surface (${\eta }_a$) and the reduction efficiency for the PM concentration in the road environment (${\eta }_{\text{PM}}$). The results give that the ${\eta }_a$ for three types of roads is ranked: branch road (87%-–100%) > major arterial road (80%-83%) > minor arterial road (68%-77%), and the ${\eta }_{\text{PM}}$ ranked: minor arterial road (70%) > branch road (46%-58%) > major arterial road (37%-53%). The ${\eta }_a$ and ${\eta }_{\text{PM}}$ varied non-linearly with time and presented a quadratic curve. The average effective control time (${\eta }_{\mathit{a}}$> 0) was 62 min on the major and minor arterial roads, and much longer than 1 hr on branch roads. The ${\eta }_{\text{PM}}$ values diminished completely by 72 min on average from the end of sprinkling for the three types of roads. Water-sprinkling can remove PM₁₀ particles from the road surface and reduce their concentration in the road environment more thoroughly than PM_2.5. Our findings could be helpful for controlling urban FRD emissions more efficiently and precisely.