生物治理技术及其应用

生物治理技术及其应用ＢｉｏｒｅｍｅｄｉａｔｉｏｎＴｅｃｈｎｏｌｏｇｙａｎｄＩｔｓＡｐｐｌｉｃａｔｉｏｎ郑远扬，白跃华一、技术特点现代化生产以来，在工业产品的生产、运输和消费过程中，都不可避免地有化学品特别是有害化学品（如石油烃类、含氧有机物、农药及有...     

Uncertainty Analysis In Dissolved Oxygen Modeling in Streams

Uncertainty analysis in surface water quality modeling is an important issue. This paper presents a method based on the first-order reliability method (FORM) to assess the exceedance probability of a target dissolved oxygen concentration in a stream, using a Streeter–Phelps prototype model. Basic uncertainty in the input parameters is considered by representing them as random variables with prescribed probability distributions. Results obtained from FORM analysis compared well with those of the Monte Carlo simulation method. The analysis also presents the stochastic sensitivity of the probabilistic outcome in the form of uncertainty importance factors, and shows how they change with changing simulation time. Furthermore, a parametric sensitivity analysis was conducted to show the effect of selection of different probability distribution functions for the three most important parameters on the design point, exceedance probability, and importance factors. Note: This version was published online in June 2005 with the cover date of August 2004.     

三峡库区重庆段小城镇的污水现状与处理工艺优选

通过采集28个样本和收集相关统计资料，调查研究了三峡库区重庆段小城镇污水现状，开对其成因进行了分析。提出了氧化沟，SBR法及其变形，AB法，稳定塘等多种适合于三峡库区重庆段小城镇的污水处理工艺。     

Water leaching of titanium from ore flotation residue

Copper ore tailings were tested for the stability of titanium submitted to water leaching in three different reactor systems (agitated vessel, bioreactor and percolated fixed-bed column). For each of these systems, titanium extraction did not exceed 1% of the available metal. Biomass removed from ore residue adsorbed a small part of the titanium with sorption capacities below 20-30 mg g(-1), but most of this biomass was sequestered in the ore residue. Oxygen and carbon dioxide concentrations were monitored and changes in concentration correlated with bacteria development at the initial stage of the process and to fungal development in the latter stages.     

河西走廊的农业资源与集约化生产结构

通过对甘肃省河西走廊农业自然资源优势的分析,本文讨论了光热资源和水资源潜力的开发利用,提出用高新技术手段建立集约化的半闭路式生态农业生产体系,促进河西走廊农业再上新台阶．     

港机操作人员不安全心理因素的分析与控制

本文通过运用安全心理学的基本理论和研究方法，对港机操作人员事故发生前的心理状态、事故原因进行分析，从而提出对港机操作人员不安全心理因素的防止、控制方法及纠正各种违章肇事行为的有效途径。     

晶析法脱磷的研究

本文介绍了晶析法脱磷的基本原理及间歇和连续晶析脱磷试验情况。试验中研究了pH、钙磷比、晶(种)磷比、搅拌时间和水力学停留时间对脱磷效果的影响。通过与石灰沉淀法相比较,证明晶析法具有方法简单,操作方便,脱磷效率高,渣量少等优点。晶析过程类似于热量传递的分子扩散过程,可用1nC/co=-K_0aθ动力学方程表示;并求得晶析速度常数K_0为3.8～4.0。     

电除尘器多功能新型供电装置的研究

为解决电除尘器供电装置存在的实际问题而研制的多功能新型供电装置,具有一机四功能、保护功能完备、对各种电场及不同性质粉尘适应性强、节能、运行可靠性高、便于使用维护和改造等特点。本文从原理、现场特性试验、经济效益分析等方面对之作了重点介绍。     

Development of an enzyme-linked immunosorbent assay for screening contamination by chlorophenols in environmental waters

The development of an immunoassay for screening contamination by chlorophenols is presented. Two haptens were synthesized and conjugated to immunizing proteins to raise rabbit polyclonal antibodies. The antibody-coated format (direct) gave better sensitivity than the conjugate-coated format (indirect) if 2,4,6-trichlorophenol is used as target analyte. The measurement range was 86.4 microg l(-1) to 0.7 microg l(-1), with an average I50 of 7.8 microg l(-1) and a detection limit of 0.2 microg l(-1). The assay detects the presence of trichloropyridinol and other chlorophenols such as di-, tetra- and pentachlorophenols constituting thus a suitable tool for the early warning of the presence of such family contaminants. The optimized method permits the detection of the most important chlorophenols in a fast and reproducible way using no more than one antibody and a single assay. The results achieved with water samples spiked with different chlorophenols fit with a multiple linear regression model when expressing the total concentration of chlorophenols as equivalent of 2,4,6-trichlorophenol (P < 0.01), demonstrating the usefulness of the assay as a screening tool to detect contamination by chlorophenols.