Application of different foliar iron fertilizers for enhancing the growth and antioxidant capacity of rice and minimizing cadmium accumulation

Environmental Science and Pollution Research - Iron (Fe) fertilizer can reduce cadmium (Cd) uptake and toxicity in rice, but the underlying mechanisms of Cd mitigation by different fertilizers are...     

The impact of urbanization and consumption patterns on China’s black carbon emissions based on input–output analysis and structural decomposition analysis

Environmental Science and Pollution Research - Urbanization in China has dramatically increased from 39.10 in 2002 to 58.52% in 2017. Studies have discussed the impacts of urbanization and its...     

Potential ecological and health risk assessment of different kiwifruit orchards in Qianjiang district,Chongqing city,China

Environmental Science and Pollution Research - Heavy metal (HM) pollution in orchards is becoming serious in many countries, and some fruit HMs exceed the safety limits. In this study, contents of...     

Effects of synthesis methods on catalytic activities of CoOx–TiO2 for low-temperature NH3-SCR of NO

A series of cobalt doped TiO_2(Co-TiO_2) and Co Oxloaded TiO_2(Co/TiO_2) catalysts prepared by sol–gel and impregnation methods respectively were investigated on selective catalytic reduction with NH_3(NH_3-SCR) of NO. It was found that Co-TiO_2 catalyst showed more preferable catalytic activity at low temperature range. From characterization results of XRD,TEM, Raman and FT-IR, Co species were proved to be doped into TiO_2 lattice by replaced Ti atoms. After being characterized and analyzed by NH_3-TPD, PL, XPS, EPR and DRIFTS, it was found that the better NH_3-SCR activities of Co-TiO_2 catalysts, compared with Co/TiO_2 catalyst, were ascribed to the formation of more oxygen vacancies which further promoted the production of more superoxide ions(O-2). The superoxide ions were crucial for the formation of low temperature SCR reaction intermediates(NO-3) by reacting with adsorbed NO molecule. Therefore, these aspects were responsible for the higher low temperature NH_3-SCR activity of Co-TiO_2 catalysts.     

Keep swimming but stop peeing in the pools

正Swimming is excellent exercise and offers many health benefits.However,the"chlorine smell"in swimming pools may be a turn-off for some people.Although this smell is often thought to be of chlorine,it actually comes from volatile compounds that are produced from unintended reactions between disinfectants(e.g.,chlorine)and organic matter in     

Adsorption–desorption behavior of atrazine on agricultural soils in China

Adsorption and desorption are important processes that affect atrazine transport,transformation,and bioavailability in soils.In this study,the adsorption–desorption characteristics of atrazine in three soils(laterite,paddy soil and alluvial soil) were evaluated using the batch equilibrium method.The results showed that the kinetics of atrazine in soils was completed in two steps:a"fast" adsorption and a "slow" adsorption and could be well described by pseudo-second-order model.In addition,the adsorption equilibrium isotherms were nonlinear and were well fitted by Freundlich and Langmuir models.It was found that the adsorption data on laterite,and paddy soil were better fitted by the Freundlich model;as for alluvial soil,the Langmuir model described it better.The maximum atrazine sorption capacities ranked as follows:paddy soil alluvial soil laterite.Results of thermodynamic calculations indicated that atrazine adsorption on three tested soils was spontaneous and endothermic.The desorption data showed that negative hysteresis occurred.Furthermore,lower solution pH value was conducive to the adsorption of atrazine in soils.The atrazine adsorption in these three tested soils was controlled by physical adsorption,including partition and surface adsorption.At lower equilibrium concentration,the atrazine adsorption process in soils was dominated by surface adsorption;while with the increase of equilibrium concentration,partition was predominant.     

壬基酚的微生物降解研究

随着全球经济和社会的发展,进入环境中的外来物质越来越多,其中许多有机污染物对微生物有抑制作用.近年的研究发现,壬基酚在各领域的广泛使用,环境中壬基酚的污染日趋严重,对人类和生态环境的危害不容忽视.针对壬基酚的危害及其微生物降解,举例说明了用于降解的微生物,阐述了壬基酚的微生物代谢途径、降解过程中的氧气、温度、pH、底物浓度等主要因素对降解影响的研究进展,并对壬基酚的微生物降解研究做出总结.     

电锅炉技术及其应用对环境影响的分析研究

针对电锅炉技术及其应用对环境影响,以绿色电力能源代替煤、油、气等常规化石能源,减少因化石能源在城镇人群聚集区终端使用造成"雾霾"类大气污染,已经成为一种新的发展趋势.本文系统分析了电锅炉的常用技术,分别阐述了不同种类电锅炉的技术原理、技术特点、工艺流程、应用领域,并通过实际应用案例,分析了电锅炉技术推广应用对城镇人口聚集区环境污染改善的效果,最后提出电锅炉技术的应用建议,为推行电锅炉技术选型提供依据,保证绿色环境的生成.     

简析页岩气开发对水资源的破坏

页岩气的开发主要采用水平井水力压裂的方法,压裂过程中压裂液的大量使用以及对返排压裂液的处理不当,会造成页岩气开发过程中对水资源的破坏,主要表现在导管破裂污染、返排液地面污染、大量消耗水资源等方面。通过总结对比返排压裂液的几种处理方法,认为废液处理后循环使用的方法在节约成本的同时,可最大程度地减小对水资源的破坏。