Introduction Water, air and soil are the most essential components to sustain life on the earth. Safe drinking water is the primary need of every human being. Village population mainly depends upon ground water sources. All ground water sources are not always safe. Some of these have problems such as excess nitrate fluoride. Fluoride is known to cause a variety of health problems viz dental fluorisis, skeletal fluorosis and non skeletal fluorosis. Fluorite occurs as vein mineral of fluorite. ...
Introduction Water pollution due to heavy metal particularly mercury resulting from various anthropogenic sources are causing serious ecological problems in many part of the world. Poor environmental management with respect to use of mercury in the society to meet our day to day requirement may aggravate the adverse effect on the various component of environment. This may leads to the transformation mercury from one compartment of environment to another, including the biota with detrimental...
在2005- 2006年期间,对卫生保健单位附近的下水道中的汞浓度进行了研究。本研究报告了各种医院/保健设施排放的废水中汞的富集情况。汞的浓度范围在低于检测极限(BDL)到0.02 mg/l之间。来自普里亚德沙尼市场地区的废水和苏丹尼亚医院附近的排水沟中所报告的最大汞浓度。< / p >
Introduction With the advent of high yielding crop varieties, the pest problems have become more acute, adversely affecting the crop yields. Fungicides are therefore, one of the major inputs in the improved technology for increasing crop production through crop protection, (Dharival and Singh 1993). A major portion of fungicides applied to economically important crops eventually finds its way to soil or aquatic system. On reaching the soil, the fungicides and /or their degradation products ma...
杀菌剂是通过保护作物来提高作物产量的改进技术的重要投入之一。铜杀菌剂Blitox和Fungimar作为叶面喷雾剂广泛用于多种植物病害的防治。施用于重要经济作物的杀菌剂的大部分最终进入土壤,可能会扰乱土壤中微生物的活动,从而改变土壤的生物平衡。因此,计划对生物
进行研究Introduction The quality of drinking water in Indian cities has deteriorated in the recent years mainly due to growing population, unplanned growth of cities coupled with no proper sewage system leading to poor disposal of the waste water, both from industrial and household activities, Ghazali (1992). On account of the paucity of open water resources for potable purpose, groundwater resources are being tapped profusely throughout the year. The over use of underground resources has led to n...
Introduction Pollution means the presence of undesirable substance in any segment of environment primarily due to human activity discharging by products, waste products or harmful secondary products, which are harmful to man and other organism.1 So, quality of water is a vital concern for mankind since it is directly linked with human welfare. Generally speaking water pollution is a state of deviation from pure conditions where by its normal function and properties are affected2. The expand...
Introduction Water, one of the precious commodities is extremely essential for the survival of all living organism. The ground water is believed to be comparatively much clear and free from pollution than surface water. But prolonged discharge of industrial effluents, domestic sewage and solid waste dump possesses the ground water to become polluted and create health problems. The problems of ground water quality are much more acute in the areas which are densely populated and thickly indus...
Introduction Now a days ground water is primary sources of drinking water. The quality of ground water depends on the ion, which are dissolved in ground water. The major ions which are responsible to maintain the quality of ground water are carbonate, bicarbonate, chloride, sulphate ,nitrate ,and fluoride. These ions are present in anionic form. The cation and anions must be equal to maintain the quality of water. Cation such as calcium ion, Magnesium ion Na+, K+ etc. are also present in gr...
Introduction Water is one of the most essential constituents of the environments. It is the vital source of a kind of life on earth. The present realization is clear about the limited resources and competing demands. This indeed has placed an urgency on the protection of quality of water a vital natural resources. The natural and man made factors responsible for water pollution. Seawage sullage solid wastes etc produces significant amount of chemical besides heavy metals which could adve...
有关池塘水质评估的理化研究已于2006年1月进行。采集4个采样池的水样,测定温度、pH值、总硬度、钙、镁等参数。表中显示了这些参数的值,说明(3)和(4)池塘的水质完全不适合饮用,而(1)和(2)池塘的水质适合用于家庭工程。< / p >
Introduction Due to rapid industrialization it lead to air pollution. Beside that out unplanned and excessive exploitation of available natural recourses have been also a causing for pollution problem in major cities line Bhopal Capital of Madhya Pradesh. Air pollution is mainly affecting the urban environment all over the world. (Ledder better 1973 and Painter 1974). Although ambient air quality is being monitored regularly in the city are of study. The main problem of pollution is due to ...
1998年5月至1999年6月期间,对曼迪深工业区周围的环境空气质量进行了研究。我们在多个监测站收集和分析了空气样本。参数包括SO2、NO2和SPM浓度。讨论了结果对人类健康可能产生的影响。< / p >
Introduction Water quality is a terms used to define the physical, chemical biological or radiological characteristics by which a particular type of water may be evaluated to establish its acceptability for various beneficial uses.2-4 Materials and Methods All the chemical used were of AR grade. Double distilled water was used for preparation of reagents. Six strategic locations were chosen for the sampling water. Those are Koni Petrol Pump (Station-I), Indira Setu (Station-II), Old B...
Introduction Ground water is one of the best source for public water supplies in many parts of the world.The physiological importance of trace elements in agriculture is well known while some of the elements like iron manganese, zinc and copper are considered to be essential micro nutrients the elements like lithium and boron have been found to be toxic to plants even in small quantities beyond certain limits Gupta et al(1972) reported lithium in saline ground waters of Mathura district (U....
Introduction The Twentieth century started with an extensive damage to the natural resources.1 Unplanned industrialization, urbanization, pollution explosion, change in life-style, over exploitation of natural resources, commercial establishment and modern agriculture practices have degraded the quality of environment. The main effects being faced are: Continental invasion of air and water. Marine pollution through waste discharges. Release of variety of chemical and b...
用椰子壳对铅(II)进行了脱除研究。对吸附效率进行了评价。研究了pH值、接触时间、吸附剂用量、金属浓度、粒径和温度等因素对吸附性能的影响。结果表明,吸附过程遵循Langmuir等温线和Freundlich等温线。热力学参数表明了该工艺的可行性。动力学研究已进行了解吸附机理。列研究已经c
Introduction Water is an important ecological factor in the life of organism. It is found in three principal forms atmospheric moisture, precipitation and soil water, of which precipitation is the the chief source. Atmospheric moisture is present as invisible vapour, Known as the humidity and also as visible vapour known as fog or cloud. Precipitation is actually the chief source of soil moisture. Soil moisture is the chief sources of water for plants .Water relation of plants bring about i...
Introduction River Jhelum is called lifeline of Kashmir, and is the only source of water, which passes throughout the valley from south to north. This water body is used for irrigation, domestic purpose and for the production of hydroelectricity. About 25% of total population of Kashmir depends on this ultimate source as they consume and earn their living from fish fauna and other resources of this water body. This river system drains into famous lakes of Kashmir namely Wular Lake and Dal L...
下Jhelum水力发电项目在Uri水力发电项目Baramulla J &K号是30年前在Jhelum河上服役的。在这一河段已记录到18种鱼类。项目投产后,该河流的水生生物多样性受到了严重的环境影响。这个项目对强大的Mahaseer, Tor putitora (Golden Mahseer)的人口产生了非常不利的影响,其中fl
Introduction Water pollution can be defined as the presence in water, of some foreign substances or impurities (organic, inorganic, radiological or biological) in such quantity so as to constitute a health hazard by lowering the water quality and making it unfit for use.1 Various agents such as domestic, industrial, thermal, Radioactive. Oils are responsible for detoring quality of water, but growing industrialization is a key stone in this respect. The industrial effluent contains vario...
Introduction The present observed pond is eutrophicated and keeps changing its physico– chemical and biotic complexes by virtue of seasonal changes and by incorporation of organic and man generated polluted matter like sewage, domestic discharges, municipal wastes, agrochemicals, grazing with other animal activities, surface run off, silt, clay, suspended inorganic and organic matter. Present study reveals that how planktonic and biotic especially fishery lives get affected on ...
Introduction Water is the basis of existence of all life forms in our biosphere. Of all the planet’s renewable resources, water has a unique place. It is essential for sustaining all forms of life, food production, economic development and for general well being. Accelerated urbanization and industrialization has made water bodies susceptible to various threats. Aquatic ecosystem is exposed to local disturbances, Suryanaraynan (1991). According to Laal et al. (1986) and Nath (2001...
本研究于2004年1月至12月在查谟进行了为期一年的水质研究,以观察各种水质参数及浮游动物动态。温度,溶解氧,游离二氧化碳,碳酸盐,碳酸氢盐,钙,镁和氯化物每月估计。共鉴定出12种浮游动物,包括枝角纲、轮虫纲和桡足纲3个主要浮游类群。枝角纲的Moina和轮虫纲的Brachionus均
Introduction Various attempts have been made (,Reynolds, 1983, Jenkins et al 1987; Gunz and Hoffman, 1990; Marinoni et al, 2001; Toom-Sauntry and Barrie, 2002; Rohrbough et al 2003; Walker et al 2003 Kang et al 2005) to document the chemical composition of snow in different parts of the world. However, except for sporadic studies (,Naik et al 1995; Sarfaraz et al 2001; Lone and Khan 2007) research on snow chemistry of mountain- clad Kashmir Himalayan valley has been ignored. In order to rem...
Introduction Environmental problem in Nigeria are numerous. They include inefficient wastes disposal, poor sewage systems, oil spills, poor urban planning and over population. All these lead to air and water pollution. These anthropogenic activities are largely caused by the poor living habits of many Nigerians and unhealthy practices of factories and other corporate bodies’ pollution in water affects not only water quality but also could be dangerous to aquatic life (Sanudo-Wilhe...
对在Nkalagu的Nigeiran水泥厂附近收集的Ebe河和Ora河的水质参数进行了评估,以确定这两条河的污染状况。除金属采用原子吸收分光光度法分析外,其他参数均采用标准分析方法测定。得到的结果显示,在分析的参数水平有变化,他们都被检测到。T < / p >
Introduction The rapid increase in the number of residential exhaust fans used in HVAC systems has resulted in corresponding increase in energy consumption of the residential sector in the country. Therefore, optimization of energy consumption is an important consideration in the design and production of residential exhaust fans. Therefore, design and construction of a standard test bed for estimation of energy performance of this class of fans is an urgent need. The test bed not only provi...