烟气脱硫石膏催化还原为硫化钙的研究

采用Fe-Ni复合催化剂,在温度650℃条件下即可将烟气脱硫石膏催化还原为硫化钙,还原率达95%以上。研究了反应温度、催化剂加入量及还原气体含量因素对还原反应的影响。     

阳离子絮凝剂P(AM-DMC)的合成及其对活性染料废水的絮凝脱色

以K2S2O8-脲为引发剂,通过自由基聚合法合成了丙烯酰胺-2-甲基丙烯酰氧乙基三甲基氯化铵P（AM—DMC）絮凝剂,并研究了其对4种活性染料模拟废水的脱色效果,考察了P（AM—DMC）加入量、阳离子度、特性粘数、染料溶液pH等因素对脱色效果的影响。实验结果表明：最佳P（AM—DMC）加入量随染料分子中磺酸基数目的增加而增加,随絮凝剂阳离子度的增大而减少;阳离子度大于52％时,最高脱色率基本相同;特性粘数对脱色效果影响很小;在染料溶液为弱酸性及中性条件下,P（AM—DMC）的脱色效果较好。P（AM—DMC）对活性染料废水的脱色机理是,P（AM—DMC）中的-N^＋（CH3）3与染料分子中的-SO3^-结合,生成-N^＋（CH3）3SO3^-,同时也形成了分子间氢键,通过键合作用使染料分子聚集沉降。     

The proliferation rule of Microcystis aeruginosa under different initial pH conditions and its influence on the pH value of the environment

Environmental Science and Pollution Research - This study investigated the characteristics of the proliferation process of Microcystis aeruginosa and its changes to environmental pH values under...     

Exploring the impact of new particle formation events on PM2.5 pollution during winter in the Yangtze River Delta, China

New particle formation（NPF） events are an increasingly interesting topic in air quality and climate science. In this study, the particle number size distributions, and the frequency of NPF events over Hefei were investigated from November 2018 to February 2019. The proportions of the nucleation mode, Aitken mode, and accumulation mode were 24.59%,53.10%, and 22.30%, respectively, which indicates the presence of abundant ultrafine particles in Hefei. Forty-six NPF events occurred during the obser...     

Haze insights and mitigation in China: An overview

The present article provides an overview of the chemical and physical features of haze in China, focusing on the relationship between haze and atmospheric fine particles, and the formation mechanism of haze. It also summarizes several of control technologies and strategies to mitigate the occurrence of haze. The development of instruments and the analysis of measurements of ambient particles and precursor concentrations have provided important information about haze formation. Indeed, the use of new instruments has greatly facilitated current haze research in China. Examples of insightful results include the relationship between fine particles and haze, the chemical compositions and sources of particles, the impacts of the aging process on haze formation, and the application of technologies that control the formation of haze. Based on these results, two relevant issues need to be addressed： understanding the relationship between haze and fine particles and understanding how to control PM2.5.     

烧烤烟气中挥发性有机物的释放规律及健康风险评价

在用餐高峰期和非高峰期分别对大型烧烤店、中型烧烤店和小型路边烧烤摊排放的烟气进行检测,发现TVOC浓度高峰期达到环境本底值的2~3倍,小型室外烧烤摊>中型烧烤店>大型烧烤店;苯与二甲苯变化规律呈现一定差异性,苯高峰期后浓度呈下降趋势,而二甲苯由于自由基反应减弱浓度缓慢升高,但仍低于高峰期浓度;苯、二甲苯的暴露剂量高峰期大于非高峰期;室外烧烤摊的暴露剂量明显大于大型烧烤店,与中型烧烤店相差不大;整个采样环境下苯不存在较高致癌风险,但仍然存在致癌风险;二甲苯不会对暴露人群造成明显的非致癌健康影响。     

浅析生物倍增工艺处理城镇污水

生物倍增（Bio—dopp）工艺是采用德国恩格拜公司研发的Bio—Dopp曝气系统、Bio—Dopp固定床及Bio—Dopp快速澄清装置等,将生物硝化反硝化、脱磷除氮及有机物氧化等工艺全部协调在同一反应池内同时进行。城镇污水厂在原有一期工程的基础上,进行二期提标扩建,并联一套Bio—Dopp反应池,同时新增一沉砂池和V型滤池,确保出水水质达标排放。     

抗污净化减噪植物在石化生产厂区选择性种植的探索

从石油石化生产厂区抗污减噪植物选择性种植入手,根据工厂的总平面布置、生产特点、污染性质及程度,以及所要达到的绿化效果,确定各类植物的比例与配置方式,从而达到调节小气候、降污减污,净化环境,减少噪声污染等生态功能。