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

1　ＩｎｔｒｏｄｕｃｔｉｏｎＭｅｒｃｕｒｙ(Ｈｇ)ａｓａｇｌｏｂａｌｐｏｌｌｕｔａｎｔｈａｓｃａｕｓｅｄｃｏｎｃｅｒｎｗｏｒｌｄｗｉｄｅｓｉｎｃｅｔｈｅｅｎｄｏｆ 1980ｓ.Ｉｔｉｓｅｍｉｔｔｅｄｔｏｔｈｅａｔｍｏｓｐｈｅｒｅｆｒｏｍｂｏｔｈａｎｔｈｒｏｐｏｇｅｎｉｃａｎｄｎａｔｕｒａｌｓｏｕｒｃｅｓ.Ｉｍｐｏｒｔａｎｔｓｏｕｒｃｅｏｆｔｈｅｆｏｒｍｅｒｉｓｔｈｅｄｉｓｃｈａｒｇｅｆｒｏｍ ｐｒｏｄｕｃｔｉｏｎａｎｄｕｓｅｏｆＨｇａｓｗｅｌｌａｓｔｈｅｃｏｍｂｕｓｔｉｏｎｏｆｆｏｓｓｉｌｆｕｅｌｓ(Ｎｒｉ…     

化学发光烯烃检测器

一、概述石油化工企业在生产过程中,排出的微量乙烯,对人体健康虽没有明显的直接危害,但烯烃类与氮氧化物在阳光紫外线的照射下,易形成光化学烟雾,是为光化学烟雾的重要初级污染物之一。乙烯对许多植物有危害。0.1mg/l的乙烯,足以造成植物生理上的变化。例如,上海石化总厂在建厂初期,生产过程中排放出的微     

Heavy metals pollution in poultry and livestock feeds and manures under intensive farming in Jiangsu Province, China

The heavy metals pollution in poultry and livestock feeds and manures under intensive farming in Jiangsu Province was investigated. 97 feed and manure samples were sampled from 31 farming plants in 10 major cities of Jiangsu. 14 metals, including Zn, Cu, Pb, Cd, Cr, Ni, Mo, Mn, Ba, Co, Sr, Ti, As and Hg, were analyzed after samples acid digestion. The results showed that the most feed samples contained high concentration of metals exceeding National Hygienical Standard for Feeds. Meanwhile, it was found that Cu, Zn, Pb, Cd and Cr concentrations in animal manures were also high, for example, Cu concentration in a manure sample reached to as much as 1726.3 mg/kg. Heavy metals loading quantities in soil per year were then calculated when metals contaminated organic fertilizers were applied, and its effects on soil environmental qualitv were further evaluated.     

An united model and simulation of nitrogen transport, uptake and transformation in soil crop system

Ａｎｕｎｉｔｅｄｍｏｄｅｌａｎｄｓｉｍｕｌａｔｉｏｎｏｆｎｉｔｒｏｇｅｎｔｒａｎｓｐｏｒｔ，ｕｐｔａｋｅａｎｄｔｒａｎｓｆｏｒｍａｔｉｏｎｉｎｓｏｉｌｃｒｏｐｓｙｓｔｅｍＷａｎｇＨｏｎｇｑｉ，ＣｈｅｎＪｉａｊｕｎＳｔａｔｅＫｅｙＬａｂｏｒａｔ...     

Prediction model of mercury accumulation in fish of reservoirs

ＩｎｔｒｏｄｕｃｔｉｏｎＨｅａｌｔｈｈａｚａｒｄｓｆｒｏｍｍｅｒｃｕｒｙｉｎｔｈｅｅｎｖｉｒｏｎｍｅｎｔｈａｖｅｃａｕｓｅｄｒｅｓｔｒｉｃｔｉｏｎｓｉｎｔｈｅｕｓｅｏｆｍｅｒｃｕｒｙａｎｄａｓｔｒｉｃｔｅｒｃｏｎｔｒｏｌｏｆｔｈｅｒｅｌｅａｓｅｏｆｍｅｒｃｕｒｙｆｒｏｍｉｎｄｕｓｔｒｉａｌａｎｄｏｔｈｅｒｕｓｅｓ.Ｂｕｔａｔｔｈｅｓａｍｅｔｉｍｅｔｈｅｓｅｓｏｕｒｃｅｓｏｆｍｅｒｃｕｒｙｈａｖｅｂｅｅｎｓｕｂｊｅｃｔｅｄｔｏｒｅｇｕｌａｔｉｏｎ ,ｔｗｏｎｅｗｓｏｕｒｃｅｓｈａｖｅａｐｐｅａｒｅｄ …     

微机控制电除尘装置的设计与实现

本文介绍了一种微机控制电除尘器电源装置,讨论了新采用的三种控制的设计方法,及微机软硬件实现方法。     

A CONSERVATION ASSESSMENT OF CENTRAL AMERICAN VEGETATION AND ECOREGIONS

Acomprehensive,standardized,andthematicallyappropriatemapofCentralAmericanvegetationandlandcovertypeswasdevelopedbyclassifyingtheremotesensedimagery(AVHRR)1km²     

Landscape ecology of the region around Qinghai Lake,Qinghai Province of China based on romote sensing

１ＩｎｔｒｏｄｕｃｔｉｏｎＡｓａｖｅｒｙｈｉｇｈａｎｄｃｏｌｄｒｅｇｉｏｎ，ｔｈｅＱｉｎｇｚａｎｇＰｌａｔｅａｕ（ＴｉｂｅｔＱｉｎｇｈａｉＰｌａｔｅａｕ）ｉｓｖｅｒｙｐｅｃｕｌｉａｒｉｎｅｃｏｌｏｇｉｃａｌｌａｎｄｓｃａｐｅｆｅａｔｕｒｅ．Ａｌｔｈ...     

Adsorption of acetanilide herbicides on soil and its components Ⅱ. Adsorption and catalytic hydrolysis of diethatyl-ethyl on saturated Na~+-, K~+-, Ca~(2+)-, and Mg~(2+)- montmorillonite

1　Ｍａｔｅｒｉａｌｓａｎｄｍｅｔｈｏｄｓ1.1　ＣｌａｙａｎｄｃｈｅｍｉｃａｌｓＴｈｅｃｌａｙｕｓｅｄｗａｓａｍｏｎｔｍｏｒｉｌｌｏｎｉｔｅＳｗｙ2ｆｒｏｍＣｒｏｏｋＣｏｕｎｔｙ,Ｗｙｏｍｉｎｇ,ａｎｄｗａｓｐｕｒｃｈａｓｅｄｆｒｏｍｔｈｅＳｏｕｒｃｅＣｌａｙＭｉｎｅｒａｌｓＲｅｐｏｓｉｔｏｒｙａｔＵｎｉｖｅｒｓｉｔｙｏｆＭｉｓｓｏｕｒｉ,Ｃｏｌｕｍｂｉａ,ＭＯ.Ｔｈｅ<2μｍｆｒａｃｔｉｏｎｗａｓｏｂｔａｉｎｅｄｂｙｓｅｄｉｍｅｎｔａｔｉｏｎ.Ｎａ+,Ｋ+,Ｍｇ2+ａｎｄＣａ2+ｓａｔｕｒａｔｅｄｃｌａｙｓｗｅ…     

等温平台无焰塞曼原子吸收直接测定血清中硒的研究

在血清样品中加入铂作基体改进剂,用1％Triton X-100稀释,在碱性介质下,用校正曲线法由等温平台石墨炉直接测定硒的含量,本法简单,快速,灵敏,稳定,可靠,特征质量为23.0pg/0.0044A.S.,变异系数为2.6—11.3％,回收率为94—104％.