Multiple biomarkers response in maize (Zea mays L.) during exposure to copper

Biomarkers in higher plants played an important role to estimate exposure effects of pollutants in soil ecosystem and have received increasing attention in recent years. The qualitative and quantitative modifications arising in amplified fragment length polymorphism （AFLP） profiles as a measure of DNA effects were compared with a number of parameters, namely, the root length, total soluble protein content in root tips, chlorophylls content and shoot size to select the most sensitive biomarker responding to copper stress in the range of 0--600 mg/kg. The changes occurring in AFLP profiles of root tips following Cu treatment included loss of normal bands and appearance of new bands and variation in band intensity in comparison to that of the normal seedlings, A reduction in root length was observed at the 200 mg/kg of copper, which was accompanied with a decrease in total soluble protein content. According to their sensitivity to the copper toxicity, the above indicator rank in the following order： AFLP profiles 〉 total soluble protein content 〉 root length 〉 chlorophylls content 〉 shoot. We concluded that the AFLP offered a useful alternative hiomarker assay for the detection of genotoxic effects of environmental pollutants.     

Preparation and characterization of Fe2O3-CeO2-TiO2/γ-Al2O3 catalyst for degradation dye wastewater

In order to develop a catalyst with high activity for catalytic wet oxidation （CWO） process at room temperature and atmospheric pressure, Fe2O3-CeO2-TiO2/γ-Al2O3 catalyst was prepared by consecutive impregnation method and the prepared parameters were optimized. The structure of the catalyst was characterized by BET, XRF, SEM and XPS technologies, and the actual wastewater was used to investigate the catalytic activity of Fe2O3-CeO2-TiO2/γ-Al2O3 in CWO process. The experimental results showed that the prepared catalyst exhibited good catalytic activity when the doping amount of Ti was 1.0 wt% （the weight ratio of Ti to carriers）, and the middle product, Fe2O3-CeO2-TiO2/γ-Al2O3, was calcined in 450℃ for 2 h. The CWO experiment for treating actual dye wastewater indicated that the COD, color and TOC of actual wastewater were decreased by 62.23%, 50.12% and 41.26% in 3 h, respectively, and the ratio of BOD5/COD was increased from 0.19 to 0.30.     

沼渣生物炭基Fenton催化剂的制备及其高效降解吡虫啉农药废水的研究

以废弃物沼渣和含铁剩余污泥为原料,采用一步热解法制备沼渣生物炭基Fenton催化剂(以下简称催化剂),构建了非均相Fenton反应体系处理含吡虫啉模拟废水,考察了H2 O2和催化剂用量对吡虫啉去除率的影响.结果表明,非均相Fenton反应体系中,H2 O2最佳投加量为0.50 g/L,催化剂最佳投加量为1.00 g/L...     

从锅炉烟气氨法脱硫副产物中回收氨水的方法

该发明公开了一种从废水、污水或泥渣，特别是从锅炉烟气氨法脱硫副产物中回收氨水的方法。其步骤为：（1）将氨法脱硫废水沉淀后的混合溶液由回水泵送入反应容器；（2）将石灰原料制成石灰乳浆液；（3）向反应容器中加入反应所需的石灰乳浆液，对其加热搅拌，进行反应，收集反应产生的氨气并将其导入氨法脱硫系统中的配液罐中用于脱硫剂的配制；     

工业废水治理与回收利用系统——混凝,气浮与过滤一体化净水技术的研究

本文结合焦作电厂工业废水的水质情况对工业废水治理与回收利用系统一混凝、气浮与过滤一体化净水技术进行了研究。主要讨论了工业废水的治理与回收利用工艺，并做了效益分析。     

油田酸化废液现场处理

酸化是油气勘探生产中常采用的措施,本文列举了处理残酸的几种常用中和剂,分析了中和剂复配使用的特点,最后选出了最经济、最易得的品种。还介绍了中和处理酸化废水的流程。根据流程,残酸水在沉砂池内中和后,再通过隔油池到蓄水池。实践证明,此两种方法是使残酸废液能被及时中和处理的切实可行的有效方法。     

分光光度法测定测田废水中的COD_(Cr)

为了快速监测油田废水中的化学需氧量ＣＯＤＣｒ,因此采用ＴＬ－１（Ａ）型污水ＣＯＤＣｒ速测仪进行加热催化消解,然后再用分光光度比色法测定ＣＯＤＣｒ,实验中进行了方法的准确度、精确度及Ｃｌ－影响实验,并与标准的重铬酸钾法进行了对比实验,结果说明分光光度法简单快速、重现性较好、准确度较高,对同一产品的测定结果与重铬酸钾法非常一致。因此,本方法可用于油田废水中的ＣＯＤＣｒ监测。     

巷道火灾燃烧模型及折算反应速率常数的探讨

根据燃烧学基本理论,提出了以火灾烟流中氧气浓度为变量的巷道火灾燃烧数学模型。在断面积5.4m~2的实验巷道内进行火灾实验,研究模型中唯一的参数——燃烧折算反应速率常数的变化。     

近场长周期强地震动幅值谱研究

本文研究了近场长周期强地震动加速度的傅氏谱和功率谱模型及其参数估计方法,基于强地震动参数统计上的无向性,提出了一种结合地震学模拟模型和工程学统计回归模型的综合方法。文中定义了强地震动平稳段均方根加速度的计算方法,并通过均方根加速度建立了震源力学参数和强地震动工程参数间的关系。通过对目前使用的主观持时定义的应用分析,指出主观持时定义使得估计的地震动过程的峰值加速度的变异性与实际地震动过程的峰值加速度的变异性有显著不同,明显偏小,这对于结构抗震可靠度分析可能会得到失效概度偏小的结果,应引起工程界的重视。     

造纸废水治理技术可行性分析

自行研究开发了一种造纸废水混凝一氧化处理新技术，并对该技术治理造纸废水的可行性进行了全面论证、分析、评价。