贵州灰家堡金矿田土壤重金属元素环境地球化学评价

为了解灰家堡金矿田土壤重金属元素环境地球化学背景和现状，本文开展了土壤重金属（As、Cd、Cr、Cu、Hg、Ni、Pb、Zn）环境质量评价。结果显示，以《土壤环境质量农用地土壤污染风险管控标准》中风险筛选值为标准，灰家堡金矿田大部分区域土壤As和Cu环境地球化学等级高（三级、四级和五级），其它重金属元素（Cd、Cr、Hg、Ni、Pb、Zn）环境地球化学等级低（一级和二级）。高土壤Cu环境地球化学等级（三级）的区域与已知的构造、地层和深部隐伏Au矿体均无空间关系。土壤中Cu的来源主要受地层背景含量的控制。高土壤As环境地球化学等级（三级、四级和五级）的区域主要沿背斜轴和断裂呈带状分布，并与深部矿体相对应，但与已有矿山生产活动区无空间关系。灰家堡金矿田高As环境地球化学等级的土壤与Au的成矿作用有关。     

南极文森峰的地层及沉积环境

文森峰的地层为一套古生代浅变质沉积碎屑岩系.通过与邻区的对比,作者将这套地层命名为文森峰组.它主要由杂色的石英砂岩、石榴子石石英砂岩组成,还有少量粉砂质泥岩、砾岩和大理岩,总厚度大于650m,自下而上可分五个岩性段.主要组成矿物为石英,并含有丰富的石榴子石,一定量的伊利石.砂岩分选性良好,成熟度高,原生沉积构造发育,属浅海滨岸相沉积.     

Studies on catalytic reduction of nitrate in groundwater

Catalytic reduction of nitrate in groundwater by sodium formate over the catalyst was investigated. Pd-Cu/γ-Al₂O₃ catalyst was prepared by impregnation and characterized by brunauer-emmett-teller (BET), inductive coupled plasma (ICP), X-ray diffraction (XRD), transmission electron microscopy (TEM) and energy dispersive X-ray (EDX). It was found that total nitrogen was effectively removed from the nitrate solution (100 mg/L) and the removal efficiency was 87%. The catalytic activity was affected by pH, catalyst amount used, concentration of sodium formate, and initial concentration of nitrate. As sodium formate was used as reductant, precise control in the initial pH was needed. Excessively high or low initial pH (7.0 or 3.0) reduced catalytic activity. At initial pH of 4.5, catalytic activity was enhanced by reducing the amount of catalyst, while concentrations of sodium formate increased with a considerable decrease in N₂ selectivity. In which case, catalytic reduction followed the first order kinetics. Translated from Acta Scientiae Circumstantiae, 2006, 26(4): 567–571 [译自: 环境科学学报]     

浅析绿色制造的战略环境评价

绿色制造的战略环境评价是实现可持续发展的关键技术 ,是协调环境与社会经济发展的重要手段。它要求在绿色制造初期———绿色设计阶段就考虑整个制造过程的环境影响 ,从决策源头上控制环境污染的产生和生态环境的破坏。本文从绿色制造的广义内涵入手 ,分析了绿色制造战略环境评价的理论基础和综合集成特性 ,并提出了战略环境评价的指标体系和综合集成评价方法。     

Assessing the Vulnerability of Coastal Communities to Extreme Storms: The Case of Revere,MA., USA

Climate change may affect the frequency, intensity, and geographic distribution of severe coastal storms. Concurrent sea-level rise would raise the baseline of flooding during such events. Meanwhile, social vulnerability factors such as poverty and disability hinder the ability to cope with storms and storm damage. While physical changes are likely to remain scientifically uncertain into the foreseeable future, the ability to mitigate potential impacts from coastal flooding may be fostered by better understanding the interplay of social and physical factors that produce human vulnerability. This study does so by integrating the classic causal model of hazards with social, environmental, and spatial dynamics that lead to the differential ability of people to cope with hazards. It uses Census data, factor analysis, data envelopment analysis, and floodplain maps to understand the compound social and physical vulnerability of coastal residents in the city of Revere, MA, USA. This revised version was published online in August 2006 with corrections to the Cover Date.     

浅议宣威矿电磷一体化建设项目循环经济发展

矿电磷一体化建设项目是云南省宣威市一个新型工业化项目和循环经济试点项目,规划设计和建设均以资源的高效利用、废物资源化利用和保护生态环境为目标,具有明显的环境效益,可最终实现企业发展与环境保护共赢.     

应用生物修复技术治理城市污染水体

我国城市水体的污染状况相当严重，大部分城市河道常年处于黑臭状态，池塘、湖泊的富营养化程度也呈逐年升高趋势、结合城市水体的特点，介绍了生物修复技术在城市水体污染治理中的应用、技术方法和影响因素，并在最后提出了目前该技术存在的问题和今后的发展方向。     

灭幼脲(Ⅲ)在模拟大气条件下光解行为的研究

研究了灭幼脲(Ⅲ)在模拟大气条件下的光解行为,测定了在不同气氛环境中灭幼脲(Ⅲ)的反应速率.结果表明,灭幼脲(Ⅲ)在氮气及空气中的光解为一级反应,其反应速率常数分别为:0.00703h~(-1)和0.0109h~(-1);在氧气中近似二级反应,其速率常数为0.00445h~(-1)(mg/g)~(-1).其主要光解产物为:对氯苯胺,对氯苯基异氰酸酯,邻氯苯甲酰胺,对氯苯基脲和N—(邻氯苯甲酰基)对氯苯胺.根据产物组成,建议了可能的反应历程.     

Formation and harmfulness of high fluoride-bearing ground-water

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我国城市污水几种处理工艺简介

介绍了近年来城市污水处理工程中常见的几种处理工艺和主要设计参数。