有机磷农药分析测试方法的改进

对有机磷分析方法进行改进．使之能有效地对乐果、甲基对硫磷和乙基对硫磷进行检测,分离效果好,时间短。     

Fixed bed adsorption for the removal of pollutants from water

The adsorption of phenol, p-chlorophenol and mercuric ions from aqueous solution onto activated carbon has been studied in fixed bed columns. The influence of varying parameters such as bed depth, solution flowrate and pollutant concentration has been studied. The Bed Depth Service Time has been used to analyse the experimental data and identify design correlations. Furthermore, an optimization procedure based on the Empty Bed Residence Time has been applied to the data.     

Degradation of MCPA by photochemical methods

The photodegradation of 4-chloro-2-methylphenoxyacetic acid (MCPA) by U.V. radiation has been studied. A possible sequence of photodecomposition has been postulated throught the characterization of the main photoproducts.The photodegradation can also be carried out by simulated sunlight and sensitizers from agricultural wastes. It has been proved that riboflavine, contained in husk rice, is one of the most effective sensitizers to degrade MCPA     

Effects of biowaste-derived biochar on the dynamic behavior of cadmium fractions in soils

Environmental Science and Pollution Research - As a commonly used amendment to soil contaminated by heavy metals, biochar has attracted great attention and has been applied for decades due to the...     

斜发沸石对城市污水处理厂二级出水中氨氮的处理效果研究

通过静态实验,研究天然斜发沸石去除城市污水处理二级出水中氨氮的性能。研究结果表明,投加量越大,沸石对废水中氨氮的去除率越高,但是吸附容量越低;沸石对氨氮的去除具有短时间内快速吸附,然后缓慢平衡的特点;粉末状沸石对氨氮的去除效果明显好于颗粒状沸石;pH对氨氮去除率有显著影响,pH值为6时,沸石对氨氮的去除率最高。NaCl和NaOH溶液对沸石的改性具有明显的效果,HCl溶液对沸石的改性作用不明显。     

Air Pollution Impacts to Some Important Species of Pine

In the past, many species of pine have been severely damaged by acute forms of air pollution associated with ore smelting. More recently, damage to ponderosa pine in the state of Washington has been associated with atmospheric fluoride, and this species in particular has also suffered smog damage in southern California. In the East, white pine has been declining in the vicinity of certain soft-coal-burning power plants, and in one case downwind from an oil-burning power plant: also, throughout the East, an atmospheric oxidant of unknown source has caused a type of needle blight on white pine. Trash burners and city dump combustion have led to the hilling of certain pine species, leaving other intermixed pine species unharmed. Localized damage to white pine from automobile exhaust has been observed. Differences in the susceptibility of neighboring trees of the same species to a given air pollutant have been observed repeatedly.     

Glycerol-mediated synthesis of nanoscale zerovalent iron and its application for the simultaneous reduction of nitrate and alachlor

Environmental Science and Pollution Research - NZVI has long been used for the remediation of different groundwater contaminants but their tendency to get oxidized easily has always been a barrier...     

固硫型煤的生产技术和使用效果

针对链式炉炉内脱硫，设计了固硫型煤生产线，通过测试、试验、生产和实际使用，使固硫型煤满足脱硫要求，同时，节能效果也较明显。另外，对固硫剂、粘结剂的选用和配比作了介绍。     

The Case of Sarno River (Southern Italy). Effects of geomorphology on the environmental impacts (8 pp)

Background, Aim and Scope Analysis of the morphological, geological and environmental characteristics of the Sarno River basin has shown the present degraded condition of the area. Over the past thirty years, the supply of untreated effluent of domestic, agricultural and industrial origin has ensured the presence of high concentrations of pollutants, including heavy metals. The geological context of the catchment area has played a major part in determining the current ecological conditions and public health problems: while human activity has modified the landscape, the natural order has indirectly contributed to increasing the environmental impact. Results and Discussion The health situation is precarious as the basin's inhabitants feed on agricultural and animal products, and use polluted water directly or indirectly. The hazard of contracting degenerative illnesses of the digestive or respiratory apparatus, bacterial infections or some neoplasia has gradually increased, especially in the last five years. Moreover, polluted basin waters flowing into the Bay of Naples increase sea water contamination, thereby damaging tourism, public health and degrading the local littoral quality. Conclusion The overview presented shows how the environmental state of the Sarno River basin gives considerable cause for concern. The basin's complex geomorphologic setting has a direct bearing on local environmental and health conditions. The analysis of the available data demonstrates how the physical aspects of the area are closely linked to the diffusion and concentration of the pollutants, and how the latter ones have a large influence on the hygienic-sanitary conditions of the local population. Recommendation and Perspective Specific interventions need to be undertaken to monitor and improve the chemical, physical and microbiological conditions of water and sediments, especially in light of the geomorphological vulnerability of the river basin.     

石灰石高温煤气脱硫的试验研究

采用天然石灰石做脱硫剂,在固定床上进行硫化氢高温脱除的试验研究,考察了脱硫剂粒径、反应温度、气速及高温煤气中H2对石灰石脱硫性能的影响,同时还用热重分析(TG)、扫描电镜(SEM)、X-射线衍射(XRD)等测试手段对脱硫剂的物相组成和结构等进行了表征。结果表明,脱硫剂的粒径对脱硫效果的影响很大,0.38～0.83 mm的石灰石脱硫效果最佳;温度对脱硫效果的影响比较复杂,最佳的操作温度为850℃;气速对脱硫效果的影响较明显,脱硫剂的穿透时间随气速的减小而加长;H₂对脱硫过程起阻碍作用,气速越小,这种阻碍作用越明显。     

Derivation of the Gaussian Plume Model

The Prevention of Significant Deterioration (PSD) doctrine has been one of the most hotly contested aspects of U. S. air pollution law. In its present form, it exerts powerful influence on land-use planning and plant siting. It has worked in the past and will presumably work in the future to increase the amount of air pollution to which the average American is regularly exposed. It has serious technical flaws. Some alternative PSD policies which remedy these flaws are proposed.     

Evaluation of the Effectiveness of The Lead Peroxide Method for Atmospheric Monitoring of Sulfur Dioxide

This paper presents a simplified analysis to determine the variables that affect the empirical correlation factor used in the lead peroxide method. The rate of sulfation has been determined from two different models. In the first model, the mass transfer rate is calculated from the gas phase resistance alone whereas in the second model, the diffusion resistance in the gel phase is assumed to be the rate limiting step. Although the gas phase and the gel phase resistances may be both important in the actual case, it has been found that the correlation factor based on the first model is adequate to describe general experimental observations. Reasonable agreement has been obtained between the measured and the calculated va|ue of the correlation factor.     

石油污染土壤的植物与微生物修复技术

石油污染土壤的生物修复技术具有成本低、简便高效、对环境影响小等优点,正逐步成为石油污染治理研究的热点领域,具有广阔的发展前景.介绍了我国的石油污染概况及生物修复技术在石油污染治理中的应用,重点对石油污染土壤的微生物修复、植物修复、植物一微生物联合修复技术的研究进展及各自的优点、局限性进行了综述,并提出了石油污染土壤生物修复技术研究的重点领域.     

超重力旋转填料床在燃煤尾气处理上的应用进展

本文指出了我国燃煤尾气脱硫进展缓慢的原因 ,介绍了一种新型的燃煤尾气脱硫设备———超重力旋转脱硫床的工作原理、传质特性及在低浓度的废气处理上的广阔应用前景     

对挥发酚测定时预蒸馏前处理方法的改进

在实验的基础上,对测定挥发酚前处理方法进行简化,提出了采用水样与蒸馏水同时加入一次性蒸馏进行预处理。经过统计检验,该法与原法相比,不仅具有省时、省电等优点,而且有较高的精密度和准确度,与原法无显著性差异。     

Daily trend of dissolved gaseous mercury concentration in coastal seawater of the Mediterranean basin.

A daily trend of DGM concentration in shallow coastal seawater has been measured in an area of the Mediterranean basin. Values up to 47 pg/l were determined for a photosynthetically active radiation (PAR) intensity of 350 W/m2. The lowest value (18 pg/l) has been observed before sunrise. A linear relationship between the PAR intensity and DGM production has been highlighted in an experiment on seawater samples exposed for 10 min to solar radiation. The processes involved in DGM production and losses are discussed.     

燃煤手烧炉烟尘生成特征及其控制

使用烟气净化测试系统,对燃煤手烧炉燃烧过程烟尘浓度变化进行了在线测定,对水浴净化前后烟气中的颗粒分散度进行了测定分析,并对SW型烟气净化装置的除尘效率进行了测定计算。实验表明,燃煤手烧炉的烟尘生成过程,与其加煤方式直接相关,且受燃烧温度的一定影响。在正常工作条件下,SW型燃煤炉窑烟气净化装置的平均除尘效率可达96 4%。     

Attenuation potentials of royal jelly against hydroxyurea-induced infertility through inhibiting oxidation and release of pro-inflammatory cytokines in male rats

Environmental Science and Pollution Research - Hydroxyurea (HDU), a class of antineoplastic drugs, has a powerful efficacy in the treatment of several types of malignancies. However, it has...     

The effects of air pollution on the lung cancer mortality in rural areas of eastern China: a multi-region study

Environmental Science and Pollution Research - Recently, the burden of lung cancer (LC) has attracted global attention. Meanwhile, LC has become the leading cause of death in China. Many studies...     

The impact of environmental regulation on environmental pollution in China: an empirical study based on the synergistic effect of industrial agglomeration

Environmental Science and Pollution Research - In recent years, as environmental degradation has become more and more serious, the Chinese government has formulated a series of environmental...