混合有机污染物在松花江水体中生物降解模拟研究

以松花江不同地点的江水和沉积物为微生物源,对江中检出的２１种有机污染物混合体系的生物降解过程进行模拟研究。结果表明,化合物结构、微生物源和驯化期是影响生物降解的主要因素;在驯化条件下,低浓度混合有机污染物的生物降解速率符合一级动力学方程。     

烟度自动监测仪

烟度自动监测仪是一种能昼夜连续自动监测锅炉排放烟气黑度的现代化仪器,它具有自动采样,显示,存贮,运算等功能,整机采用单片机控制,对实测和运算值进行数字显示,及时监测烟气排放是否超标,机内还设计了断电保护装置,即使连续断电半年,数据仍不丢失,断电恢复后,仪器能自动启动并连续运行,机内可存贮连续半年的监测有效数据。该机也同样适用于水泥、陶瓷、化工等行业的粉尘及烟尘监测,只需改变软件程序,仍可达到同样的     

全国排污申报登记系统的研究与开发

简要介绍全国排污申报登记系统的指标体系设计,信息分类偏码,重点污染源筛选和系统结构设计、功能,程序设计等主要技术方法,并结合系统开发经验阐述了全国排污申报统一软件的研究成果及其功能特点。     

聚乙烯及其废料油化技术中催化剂的研制与性能研究

本文研究了几种自制催化剂对聚乙烯热解产物的催化改质作用,催化反应温度与催化剂性质对催化改质所得气体收率及组成、汽油收率及辛烷值、柴油收率以及催化剂积碳的影响,探讨了适合聚乙烯及其废料热解产物催化改质的催化剂应具备的特性及热解产物在催化剂上反应的类型,同时探讨了本研究对废塑料油化技术的指导作用。应用此催化剂液体收率可达８０％以上,汽油辛烷值为８２（ＲＯＮ）。     

辐射技术在水处理中的应用及其发展

介绍了水处理辐射技术的分类、处理机理及其特点;概括了辐射技术在水处理中的应用情况;分析了辐射技术在水处理中的发展趋势。     

高锰酸钾净水的氧化副产物研究

在高锰酸钾预氧化条件下 ,对北京京密引水渠水和松花江水进行混凝处理 ,并将原水与出水水样经色谱 质谱联用仪分析 ,以 1997年美国国家环保局 (USEPA)提出的饮用水规程和健康建议为标准 ,初步探讨了高锰酸钾净水过程中产生的副产物是否对人体有毒害作用 .试验结果表明 :在试验条件下 ,尚未发现高锰酸钾氧化生成USEPA规定的有毒有害副产物 ,并认为其原因可能与高锰酸钾氧化作用方式以及氧化过程中生成的新生态水合二氧化锰的吸附作用有关 .     

彗星试验技术在水生与土壤环境中的毒理学应用

彗星试验是一种检测真核细胞脱氧核糖核酸(DNA)损伤的技术,快速、低成本、适用于几乎所有真核细胞,因此常应用于遗传毒理学、辐射生物学、肿瘤细胞学、毒性检测等方面。尤其以灵敏度高、检测联合毒性的特点大量运用于环境研究中。主要介绍彗星试验方法学发展历程,彗星试验的原理及其在环境领域中的应用,并指出应用中的受限因素以及未来的发展前景,为今后进一步推广该试验技术提供理论上的指导与参考。     

Enhanced non-radical activation of persulfate with pompon-like NiO microspheres for removing sulfamethoxazole in water

Environmental Science and Pollution Research - The development of efficient heterogeneous catalyst for non-radical activation of persulfate (PS) is highly desired for removing organic pollutants in...     

我国废塑料油化技术的应用现状与前景

介绍了我国废塑料油化技术的现状,对废塑料的热解法、热解－催化改质法、催化热解法3种基本方法进行了经济技术评价,对建立废塑料油化工厂的原料收集体系及运输距离、建厂规模、生产过程中存在的二次污染问题进行了分析,探讨了控制污染的方案,对制定相关的政策和法律提出了建议,探讨了具有我国特色的废塑料油化技术发展及应用之路。     

Aerosol transmission,an indispensable route of COVID-19 spread: case study of a department-store cluster

• Aerosol transmission is an indispensable route of COVID-19 spread. • Different outbreak sites have different epidemiologic feature. • SRAS-CoV-2 can exist for a long time in aerosol. • SRAS-CoV-2 RNA can be detected in aerosol in diverse places. • Some environmental factors can impact SARS-CoV-2 transportation in aerosol. Patients with COVID-19 have revealed a massive outbreak around the world, leading to widespread concerns in global scope. Figuring out the transmission route of COVID-19 is necessary to control further spread. We analyzed the data of 43 patients in Baodi Department Store (China) to supplement the transmission route and epidemiological characteristics of COVID-19 in a cluster outbreak. Incubation median was estimated to endure 5.95 days (2–13 days). Almost 76.3% of patients sought medical attention immediately upon illness onset. The median period of illness onset to hospitalization and confirmation were 3.96 days (0–14) and 5.58 days (1–21), respectively. Patients with different cluster case could demonstrate unique epidemiological characteristics due to the particularity of outbreak sites. SRAS-CoV-2 can be released into the surrounding air through patient’s respiratory tract activities, and can exist for a long time for long-distance transportation. SRAS-CoV-2 RNA can be detected in aerosol in different sites, including isolation ward, general ward, outdoor, toilet, hallway, and crowded public area. Environmental factors influencing were analyzed and indicated that the SARS-CoV-2 transportation in aerosol was dependent on temperature, air humidity, ventilation rate and inactivating chemicals (ozone) content. As for the infection route of case numbers 2 to 6, 10, 13, 16, 17, 18, 20 and 23, we believe that aerosol transmission played a significant role in analyzing their exposure history and environmental conditions in Baodi Department Store. Aerosol transmission could occur in some cluster cases when the environmental factors are suitable, and it is an indispensable route of COVID-19 spread.