紫木凼金矿开采过程中的环境效应:2.污染趋势分析

主要对紫木凼金矿区CN- 、As、Hg、Pb、Zn五个污染项目进行了趋势分析和污染预测。氰化物虽然是剧毒污染物 ,但它具有很强的自净降解作用 ,对矿区的污染影响不大 ,只是对于废液池的清洗外排必须先治理后排放。建立了As、Hg、Pb、Zn在各个污染途径中的定量分配模式。该模式表明 ,开采过程中As、Hg、Pb的大部分 ( 64 %以上 )进入废液池外排 ,其余的进入矿渣。在此基础上 ,对这些元素从 1 989年到 2 0 0 0年的开采总量、进入废液、土壤、积水坑的分量进行了计算 ,并给出了在堆场下伏粘土中各元素的饱和吸附量和开始外排的时间。     

城市生活垃圾无害化处理工艺

根据武汉市金口、郭茨口两个垃圾处理场情况 ,分析了城市生活垃圾处理现状及其危害 ,阐述了生活垃圾无害化处理工艺 ,提出生活垃圾无害化处理不仅可以实现资源的持续利用 ,而且奠定了城市可持续发展的基础     

滇池草海污染底泥疏挖及处置工程效益分析

草海污染底泥疏挖及处置工程是滇池综合治理的重要组成部分。本文针对草海底泥分布及污染特征。在已确定的工程措施基础上，探讨分析了工程的综合效益。明确了该工程是解决滇池内源污染的重要措施，工程的实施能有效清除草游淤泥、改善水质及促进水生生态恢复，可望达到积极而显著的环境效益，同时也将取得良好的社会效益和经济效益。     

Oil spill model development and application for emergency response system

ＩｎｔｒｏｄｕｃｔｉｏｎＯｉｌｉｓａｋｉｎｄｏｆｎｅｃｅｓｓａｒｙｅｎｅｒｇｙａｎｄｒｅｓｏｕｒｃｅｉｎｐｒｅｓｅｎｔｈｕｍａｎｐｒｏｄｕｃｔｉｏｎａｎｄｄａｉｌｙｌｉｆｅ.Ｂｕｔａｓｓｏｏｎａｓｏｉｌｓｐｉｌｌｉｎｇａｔｔｈｅｓｅａ,ｉｔｗｉｌｌｂｅｃｏｍｅａｄｉｓａｓｔｅｒｓｏｕｒｃｅｐｏｌｌｕｔｉｎｇｅｎｖｉｒｏｎｍｅｎｔａｎｄｄｅｓｔｒｏｙｉｎｇｅｃｏｌｏｇｙ.Ｒｅｌａｔｅｄｔｏｍａｎｙｏｉｌｓｐｉｌｌｆａｔｅｐｒｏｃｅｓｓｅｓ,ｏｉｌｓｐｉｌｌｍｏｄｅｌｉｓａｋｉｎｄｏｆｃｏｍｐｒｅｈｅｎ…     

Soil and water loss in the Lancang River-Mekong River watershed (in Yunnan section, China) and its control measures

ＭｅｋｏｎｇＲｉｖｅｒｉｓｏｒｉｇｉｎａｔｅｄｉｎｔｈｅｎｏｒｔｈｅｒｎｒａｎｇｅｏｆＴｉｂｅｔＱｉｎｇｈａｉＰｌａｔｅａｕｏｆＣｈｉｎａ,ｆｌｏｗｉｎｇｔｈｒｏｕｇｈｓｉｘｃｏｕｎｔｒｉｅｓ,ｔｈｅｙａｒｅＣｈｉｎａ(ＹｕｎｎａｎＰｒｏｖｉｎｃｅ),Ｍ?..     

连续式磁性颗粒去除器在轧钢废水处理中的应用

连续式磁性颗粒去除器，是利用稀土永磁Ｎｄ－Ｆｅ－Ｂ为材质，处理含磁性颗粒废水的装置，其主要结构由动力传递，磁块组合体，磁条移动，设备本体，进出口流道及分离部件等组成，该文阐述了永磁分离机理，并通过磁性悬浮颗粒的理论驱进速度和最小捕获粒径的求解，探讨了提高砒生粒去除器捕 方法，实践证明，该装置用于冶金轧钢废水处理中，能代替传统的轧钢废水三级处理工艺，节约投资成本７０％，占地减少８５％，运行费用亦大幅     

Prenatal application of fluorescent in situ hybridization (FISH) for identification of a mosaic Y-chromosome marker,IDIC(Yp)

An amniocentesis was performed at 13.3 weeks' gestation for advanced maternal age. A mosaic sex chromosome pattern was found: of 50 cells examined, 34 had a 45,X karyotype. In 14 cells with a modal number of 46, a recognizable Y was substituted by a small non-fluorescent marker. C-banding identified the marker as an isodicentric in 12 cells. In two cells, the non-fluorescent marker appeared to be monocentric and looked like a non-fluorescent del (Yq), but could have been an isodicentric Y with inactivation of one of the centromeres. Two cells with a modal number of 47 showed two copies of the monocentric marker. Fluorescent in situ hybridization with an alpha satellite Y-specific centromeric probe confirmed the Y-chromosome origin of the markers and allowed for more accurate prenatal diagnostic information.     

锰砂表面改性去除酚类化合物的研究

本文叙述了锰砂表面改性(以下简称旧锰砂)处理含酚饮用水的实验研究,陈酚率可达99％。本实验对除酚因素(温度、pH值、流速和接触时间等)进行了实验研究。当进水酚浓度≤2.0mg/l时,经旧锰砂的吸附,可使酚浓度≤0.002mg/l。     

Status of air pollution in Beijing

A study has been made on elements organic constituents, TSP, SO2,NO2 of atmospheric pollutants in Beijing. 17 elements, and some PAHs, e. g. B(a)P, B(b, j, k)P, and B(g, h, i)P, in airborne particles by X-ray fluorescence spectroscopy and HPLC, GC/MS, have been determined respectively. It has been shown that the elements Pb, Zn, S and Cu were more enriched in fine particles and different valence states of sulfur at various sites. It was found that the concentrations of S6+ and S2-were more than 85% and less than 15% of the total sulfur respectively. Concentrations of major PAHs and sulfur-containing compounds increased in winter and in urban area. High values for Pb and Zn in city, Fe and Mn at industrial area and Cu, Al rural sites were obtained respectively. This implies the functions of different elemental sources of various sites. Thus, elements can be from distingushed anthropogenic and natural sources.The main contribution of SO2 was found of to have same seasonal variation as the anthropogenic el     

企业污染治理设施运行存在的问题和政府管理对策

由浙江省嘉兴市环境保护主管部门的环境处罚案件表明,排污企业污染治理设施运行存在的问题是导致超标排污的主要原因.在通过对该市大量排污企业污染治理设施运行管理情况调查分析的基础上,总结出目前企业内部污染治理设施运行管理中存在的主要问题有:企业对环保工作主观重视程度不够、污染治理设施建设滞后引起超负荷运行、疏于维护管理导致不能发挥正常治污效果、操作管理人员专业文化素质偏低引起操作不当以及处理设施被擅自改变、拆除或者闲置;同时对这些问题的产生原因进行了分析.并从宣传教育、加强企业环境管理、严格执法和推行政策等方面提出了相应的管理对策.