氧化亚铁硫杆菌对亚铁离子的氧化及其动力学研究

采用9K培养基研究了氧化亚铁硫杆菌氧化Fe^2＋过程中,pH和氧化还原电位的变化规律,并对Fe^2＋的氧化过程进行动力学分析,确定了其反应级数及反应速率常数。结果表明,（1）在温度为30℃,摇床转速为150r／min的条件下,氧化亚铁硫杆菌的最佳接种量为10．0％;（2）Fe^2＋初始质量浓度在11．39～21．72g／L时,随着浓度的增大,Fe^2＋达到100％转化率需要的时间增加;（3）氧化亚铁硫杆菌对Fe^2＋的氧化可近似看作一级反应,反应速率常数为0．0527～0．0788h。     

MBR+CSTR联合工艺处理精对苯二甲酸生产废水

通过MBR＋CSTR两段好氧法对精对苯二甲酸生产废水进行处理,取得了令人满意的结果。经过MBR反应器,CODCr由5000mg／L降为500mg／L以下,并且很好地控制了系统pH的上升。在CSTR反应器中CODe。能降至35mg／L,达到国家污水综合排放一级标准（GB8978-1996）。     

Green and compatible industrial development in Western China

Western China has lagged a lot in terms of industrial structure and economic development,compared with the national average.And China announced its target of CO_2 emission reduction,i.e.by 2020,CO_2 emission per GDP will drop by40-45%compared with 2005.The target will be incorporated into China's long-term industrial planning.Against this background,this paper will make a comprehensive examination of the industrial development of Western China,aiming to discover a green and compatible way.First,we analyze the spatiotemporal evolution of regional industrial structure for the period 2000-2010.Second,we try to discover the industrial structure optimization path for Western China by employing the Vector Auto Regression model.Lastly,we try to provide some advice and suggestions for further industrial development in Western China.Our examination shows that further industrial development in Western China should pay full attention to resource conservation and recycling,and develop on a green and compatible path.     

Enhanced nitrogen removal upon the addition of volatile fatty acids from activated sludge by combining calcium peroxide and low-thermal pretreatments

This study investigated a combined low-thermal and CaO₂ pretreatment to enhance the volatile fatty acid (VFA) production from waste activated sludge (WAS). The fermentative product was added to a sequencing batch reactor (SBR) as an external carbon source to enhance nitrogen removal. The results showed that the combined pretreatment improved WAS solubilization, releasing more biodegradable substrates, such as proteins and polysaccharides, from TB-EPS to LB-EPS and S-EPS. The maximum VFA production of 3529 ± 188 mg COD/L was obtained in the combined pretreatment (0.2 g CaO₂/g VS + 70 °C for 60 min), which was 2.1 and 1.4-fold of that obtained from the sole low-thermal pretreatment and the control test, respectively. Consequently, when the fermentative liquid was added as an external denitrification carbon source, the effluent total nitrogen decreased to Class A of the discharge standard for pollutants in rural wastewater treatment plants in most areas of China.     

Short-term effects and economic burden assessment of ambient air pollution on hospitalizations for schizophrenia

Environmental Science and Pollution Research - The evidence on the health and economic impacts of air pollution with schizophrenia is scarce, especially in developing countries. In this...     

Effects of ambient temperature on outpatient visits for dermatitis in Xinxiang,China: a time-series analysis

Environmental Science and Pollution Research - Previous studies have reported regional variations in the relationship between ambient temperature and dermatitis, which therefore remain...     

Investigating global surface temperature from the perspectives of environmental,demographic, and economic indicators: current status and future temperature trend

Environmental Science and Pollution Research - Anthropogenic activities have increased atmospheric concentrations of greenhouse gas emissions, which have observably increased global temperature....     

Simultaneous nitrification and denitrification in a PCL-supported constructed wetland with limited aeration

Environmental Science and Pollution Research - Considerable advances have been made in the substrate design and operation strategies of constructed wetlands to facilitate nitrogen elimination....     

Numerical modeling of changes in groundwater storage and nitrate load in the unconfined aquifer near a river receiving reclaimed water

Environmental Science and Pollution Research - Reclaimed water (RW) has been widely used as an alternative water resource to recharge rivers in mega-city Beijing. At the same time, the RW also...     

A review of the global climate change impacts,adaptation, and sustainable mitigation measures

Environmental Science and Pollution Research - Climate change is a long-lasting change in the weather arrays across tropics to polls. It is a global threat that has embarked on to put stress on...