重铬酸钾紫外光度法快速测定COD,BOD5的技术特点及可行性研究

本文概述了紫外线光度法快速测定ＣＯＤ，ＢＯＤ５方法的技术特点，对其在地面水和污废水监测中应用的可行性及有关条件进行了研究，通过对实际样品的测定，验证了其与原有测定方法具有可比性。     

高浓度印染废水处理工程工艺条件与实例分析

研究以三相生物流化床作为工程化反应器处理印染废水的工程工艺条件及操作特性，分别测定流化床内的气相含率，兴体循环速度及体积氧传质系数。     

加油站火灾爆炸故障树分析

采用安全系统工程的方法,对加油站的火灾爆炸事故进行了故障树分析。通过故障树分析,得出4个最小径集,指明了预防事故发生的可能途径;从而确定出加油站火灾爆炸事故的预防措施,并做出安全检查表,以供现场实施参考。     

Photocatalytic remediation of γ-HCH contaminated soil induced by α-Fe2O3 and TiO2

Heterogeneous photocatalytic degradation of γ-HCH on soil surfaces was carried out to evaluate the photocatalytic effectiveness of α-Fe2O3 and TiO2 toward degrading γ-HCH on soil surfaces. After being spiked with γ-HCH, soil samples were loaded with α-Fe2O3 or TiO2 and exposed to UV-light irradiation. Different catalyst loads(0%, 2%, 5%, 7%, and 10% (wt). α-Fe2O3; 0%, 0.5%, 1%, 2% wt. TiO2) were tested for up to 7 d irradiation. The effects of soil thickness, acidity, and humic substances were also investigated. The obtained results indicated that the γ-HCH photodegradation follows the pseudo-first-order kinetics. The addition of α-Fe2O3 or TiO2 accelerates the photodegradation of γ-HCH, while the photodegradation rate decreases when the content of α-Fe2O3 exceeds 7%(wt.). The degradation rate increases with the soil pH value. Humic substances inhibit the photocatalytic degradation of γ-HCH. Pentachlorocyclohexene, tetrachlorocyclohexene, and trichlorobenzene are detected as photodegradation intermediates, which are gradually degraded with the photodegradation evolution.     

Comparing dark- and photo-Fenton-like degradation of emerging pollutant over photo-switchable Bi2WO6/CuFe2O4: Investigation on dominant reactive oxidation species

The extensive use of tetracycline hydrochloride (TCH) poses a threat to human health and the aquatic environment. Here, magnetic p-n Bi₂WO₆/CuFe₂O₄ catalyst was fabricated to efficiently remove TCH. The obtained Bi₂WO₆/CuFe₂O₄ exhibited 92.1% TCH degradation efficiency and 50.7% and 35.1% mineralization performance for TCH and raw secondary effluent from a wastewater treatment plant in a photo-Fenton-like system, respectively. The remarkable performance was attributed to the fact that photogenerated electrons accelerated the Fe(III)/Fe(II) and Cu(II)/Cu(I) conversion for the Fenton-like reaction between Fe(II)/Cu(I) and H₂O₂, thereby generating abundant ?OH for pollutant oxidation. Various environmental factors including H₂O₂ concentration, initial pH, catalyst dosage, TCH concentration and inorganic ions were explored. The reactive oxidation species (ROS) quenching results and electron spin resonance (ESR) spectra confirmed that ?O₂^? and ?OH were responsible for the dark and photo-Fenton-like systems, respectively. The degradation mechanisms and pathways of TCH were proposed, and the toxicity of products was evaluated. This work contributes a highly efficient and environmentally friendly catalyst and provides a clear mechanistic explanation for the removal of antibiotic pollutants in environmental remediation.     

基于模糊综合评判法对集中供热锅炉环保设施综合评价研究

以乌鲁木齐市某集中供热锅炉污染物减排方案为例,通过建立脱硫除尘设施综合评价指标体系,运用层次分析法确定指标权重,利用模糊综合评判法分别对两种除尘设施情况下的环境效益、经济效益以及设施能耗、物耗等指标着手,进行综合评价,最终评选出较优实施方案.评选结果表明：袋式除尘＋石灰石-石膏法脱硫除尘设施方案运用于该集中供热站综合效益较好,可有效实现污染物减排,为今后燃煤锅炉环保设施的评选提供一定的参考作用.     

清水江流域环境保护污染治理经济效益分析

以《贵州省清水江流域环境保护规划(2013-2020年)》为例,分析清水江流域治理主要污染物的削减量和费用支出。从环境经济角度,通过费用-效益分析法以货币量化进行计算,流域治理能带来一定的经济效益、环境效益和社会效益。     

长输管道事故数据库的对比分析

从影响长输管道安全的外部因素、事故定义、事故分类以及事故数据分析和事故报告等几个方面,对国际上主要长输管道事故数据库进行了对比分析,提出了建立我国长输管道事故数据库的建议.     

潜流人工湿地填料筛选及其对小城镇微污染水的修复性能评价

为了选择适合小城镇潜流人工湿地的填料,选取小城镇较为常见的材料(废砖、卵石、碎石),结合物化性质,研究25℃下填料对磷的吸附效果,并分析了填料种类对野外潜流人工湿地运行的影响。结果表明:(1)25℃时,3种填料对磷的吸附量随着溶液中初始磷浓度的增加而增加,吸附能力依次为废砖>碎石>卵石;(2)野外潜流人工湿地运行过程中,随HRT的延长,组合填料湿地WL1和废砖填料WL2湿地对总磷的净化效果有所提高,且WL2湿地对总磷的去除效果略优于WL1。因此,可以选择废砖作为小城镇潜流人工湿地系统的填料。     

浅析城市化进程中产业集群的可持续发展问题

产业集群的可持续发展是中国城市化进程中的一个重要问题,本文从中国产业集群的发展现状入手,揭示产业集群的产生机制与类型,分析产业集群与城市化和可持续发展的关系,剖析产业集群实现可持续发展的模式与动力机制,指出中国城市化进程中产业集群可持续发展存在的三大问题,建议将城市化和可持续发展贯穿于产业集群发展中,实现良性发展。