Assessment of the Heavy Metal Pollution Effects on the Soil Respiration in the Baix Llobregat (Catalonia, NE Spain)

A main goal of investigations is to determine could a soilrespiration be an indicator of the soil pollution. In this case a measured levelof the soil oxygen consumption depends of its pollution. It alsomeans that the pollution reduces biological processes in edaphon.Investigated soil samples were taken from polluted andnon-polluted places in the Baix Llobregat near Barcelona (Catalonia, NE Spain). Soil samples were taken from the top ofsoil (0–5 cm) without a litter. Soil analysis were done, determining percentage shares of coarsefragments, coarse sand, fine sand, coarse silt, fine silt, clay,CaCO₃, organic matter as well as water pH and conductivityCE (1:5 [mS cm^-1]). Also were determined (in mg kg^-1)quantities of heavy metals, as Fe, Al, Mn, Zn, Cr, Ni, V, Cu, Cd, Pb.The soil respiration was investigated in temperatures15 and 30 °C and with controlled humidity.The respiration in 30 °C is number of times greater thenin 15 °C both for polluted and non-polluted soils.Particularly high coefficients of correlation between the soilrespiration and soil pollution in polluted soils were obtainedfor Pb: r = 0.75 in 15 °C and r = 0.98 in30 °C; for Ba: 0.90 and 0.57; for V: 0.99 and 0.81. In non-polluted soils highest correlation coefficients are for Pb: r = 0.70 in 15 °C; Fe: 0.60 and 0.72; Al: 0.68 and0.64; Mn: 0.51 and 0.66; Ba: 0.63 and 0.61; Cr: 0.94 and0.70; Ni: 0.64 and 0.65; Cu: 0.69 and 0.48; as well as V: 0.62in 15 °C; and Cd: 0.69 in 15 °C.This way the soil respiration could be a good indicator of the soil pollution.     

Soil properties and crop productivity as influenced by flyash incorporation in soil

Field experiments were carried out during 1996–97at Gulawathi, Muthiani and Salarpur Villages, IARI Farm, NewDelhi and NCPP Campus, Dadri to evaluate changes in soilcharacteristics and growth of wheat (Triticum aestivum L.),mustard (Brassica juncea L.), lentil (Lence esculentaMoench.), rice (Oryza sativa L.) and maize (Zea mays L.) byvarying amounts of flyash addition (up to 50t ha^-1) in soils atsowing/transplanting time of crops. Flyash addition in areasadjoining NCPP Thermal Power Plant, Dadri, Ghaziabad, U.P.ranged from 5–12 t ha^-1 yr^-1 in 1995–96. Shoot and root growthand yield of test crops at different locations after flyashincorporation resulted in beneficial effects of flyashaddition in most cases. The silt dominant texture of flyashimproved loamy sand to sandy loam textures of the surfacesoils at the farmers' fields. The increased growth in yield ofcrops with flyash incorporation was possibly due tomodifications in soil moisture retention and transmissioncharacteristics, bulk density, physico-chemical characterssuch as pH and EC and organic carbon content. The response offlyash addition in the soil on soil health and cropproductivity needs to be evaluated on long-term sustainableaspects.     

Determination of arsenic in grain and soil by hydride nondispersive atomic fluorescence method

Quantity of trace arsenic in grain and soil was determined by hydride nondispersive atomic fluorescence method.Optimum conditions of measurement were selected in the experiment including the pH of the medium, reductive agent, the concentration and flowing velocity of KBH4, rate of carrier gas and atomized temperature. The reference sample of rice C was determined and the linear relationship of the calibration curve was plotted, indicating that the method was highly precise. In the experiment of recovery rate, the method was quite satisfactory.Based on the determination of hundreds of samples, it is proved that atomic fluorescence method is rapid, sensitive and low in interference. It is very efficient on determination of trace arsenic in soils and grains, especially in grains.     

红壤中结合态磷在酸化条件下的变化及其相互关系

以浙江沿海地区的红壤为研究对象，通过浸滤过程，研究了在酸化条件下，红壤中可溶笥结合态磷的变化和它们之间的相关关系，结果显示，红壤中可溶性Fe-P比Ca－P、Al－P对酸度的变化更为敏感；当红壤中可溶性磷的原始含量较高时，随酸度的增强从固相中释出的趋势更明显；在酸化过程中、红壤中不同可溶性结合态磷之间呈现出不同的相关关系，这归因子它们对酸化敏感性的差异。     

海滨浴场的卫生细菌学调查及保护对策

从卫生细菌学角度，选用总大量菌群作为指标，对多年的海浴场监测结果进行了综合分析，以期了解近年来秦皇岛海滨浴场的水质变化情况，并提出了可行的保护对策。     

Effect of acid precipitation on leaching of nutritionsand aluminium from forest soils

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土壤中总硒与水溶性硒相关性的环境因素

通过对湖北省部分地区土壤中总硒与水溶性硒的调查研究，分析土壤中总硒与水溶性硒的相关性与自然环境因素的关系。从而探讨导致缺硒和富硒疾病的成因。     

炭素行业推行清洁生产的污染物排放系数研究

推行清洁生产、减少污染物排放量，根本的方法是控制物料流失。本研究对炭素制品生产过程中的投入产出进行物料平衡测算，确定各工序物料流失总量及污染物排放系数，提出减少流失、降低排污系数的措施。     

Effects of atmospheric mercury pollution on terrestrial ecosystem in Chongqing, China

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Cobalt in alluvial Egyptian soils as affected by industrial activities

ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｎａｔｕｒｅＣｏｏｃｃｕｒｓｉｎｔｗｏｏｘｉｄａｔｉｏｎｓｔａｔｅｓ ,Ｃｏ2 + ａｎｄＣｏ3+ ,ａｎｄｆｏｒｍａｔｉｏｎｏｆｔｈｅｃｏｍｐｌｅｘａｎｉｏｎＣｏ(ＯＨ) - 3 ｉｓａｌｓｏｐｏｓｓｉｂｌｅ .ＤｕｒｉｎｇｗｅａｔｈｅｒｉｎｇＣｏｉｓｒｅｌａｔｉｖｅｌｙｍｏｂｉｌｅｉｎｏｘｉｄｉｚｉｎｇａｃｉｄｅｎｖｉｒｏｎｍｅｎｔ,ｂｕｔｄｕｅｔｏａｈｉｇｈｓｏｒｐｔｉｏｎｂｙＦｅａｎｄＭｎｏｘｉｄｅｓ,ａｓｗｅｌｌａｓｂｙｃｌａｙｍｉｎｅｒａｌｓ,ｔｈｉｓｍｅｔａｌｄｏｅｓｎｏｔｍ…