活性污泥法+接触氧化法工艺处理高盐度环氧丙烷生产废水的试验研究

采用活性污泥法和接触氧化两段工艺对高含盐的环氧丙烷生产废水进行处理，同时研究了不同水力停留时间的处理效果和不同的盐度对处理效果的影响。试验结果表明CODcr的去除率可以达84．38％，出水CODcr＜160mg／L，pH＜8。     

Mechanisms of copper tolerance by Armeria maritima in Dolfrwyong Bog,north Wales--initial studies

Preliminary field studies were carried out at Dolfrwynog Bog in July 2000. Replicate samples of water, Armeria maritima plants and the soils adhering to its roots were collected and analysed for copper. Concentrations of up to 6486 mg kg^–1 of copper in the soils were recorded. Accumulation of copper by the plant as expressed by concentration factors (CF) show that it is acting mainly as a copper excluder. Of the copper that is taken up, most of it is retained within the roots with very little being transported to the shoots of the plant. Moreover, a further possible mechanism of tolerance is exhibited by the excretion of copper through its decaying leaves. Towards the use of in vitro cultures to study the copper tolerance mechanisms in A. maritima a micropropagation protocol has been developed. The ex vitro plants have been rooted and established in compost.     

IMPLEMENTATION OF ACUTE CRITERIA FOR CONSERVATIVE SUBSTANCES1

ABSTRACT: Acute criteria are assigned to the fish and wildlife propagation beneficial use in Oklahoma's water quality standards. Dye studies are analyzed to show that these criteria can be implemented through acute regulatory mixing zones. Acute regulatory mixing zones may be defined as areas in receiving streams where acute numerical criteria may be exceeded without causing acute toxicity. Acute regulatory mixing zones are used to obtain acute waste load allocations. If effluent loading does not exceed acute waste load allocation, acute criteria exceedance is confined to the acute regulatory mixing zone and there is no acute toxicity in the receiving stream. Waste load allocations for acute and chronic criteria are compared to determine which is appropriate to develop permit limits for the dye studies.     

丁烷与空气混合物的爆炸性能测定

在不同条件下,对丁烷与空气混合物进行爆炸实验,由微机数采测试系统测定其爆炸参数（爆轰波压力、爆轰波传播速度等）、爆轰极限以及当其形成爆轰时所需的临界起爆能。通过实验测定,为评价丁烷与空气混合物的安全性能提供重要依据     

大庆地区空气中总烃与非甲烷烃分布规律研究

分析了大庆地区空气中总径与非甲烷烃的比例关系，年、季、日变化规律及浓度水平。说明了总径与非甲烷径浓度水平在采暖期和非采暖期无显著差别，且冬、夏分布大体一致，高浓度多集中于大庆市东北部，浓度值向西南偏南方向递减，总烃总体浓度冬季较夏季偏向于西南这一规律。讨论了气候条件对分布规律的影响，并指出总烂的主要来源是油田开发和机动车尾气排放。     

金沙江流域水土流失与人类活动影响分析

长江三峡水利枢纽工程能否正常发挥效益，泥沙是重要的制约因素之一，而水库的泥沙主要来自上游金沙江，其多年平均输沙量占入库寸滩站的５２７％。因此，本文对金沙江泥沙的地区组成、水土流失及人类活动影响等问题进行了深入的分析，并提出了防治对策。     

海平面上升对海岸带环境的影响与危害及其防治对策

本文阐述了过去近百年来和未来特定年份海平面上升的趋势，分析了海平面上升的原因及其对海岸带环境的影响与危害，最后提出了防治对策与措施。     

阳极溶出伏安法测定ppb级Cu,pb,Cd的实验条件的选择

本文介绍了在环境监测中，经试验研究，确定的用阳极溶出伏安法，连续分析环境样品中重金属Ｃｕ，Ｐｂ，Ｃｄ的最佳条件，即用悬汞电极做工作电极，用０．１Ｍ离氯酸做支持电解质，纯氮除氧。当ＰＨ值取２－７，富集电位数－１．１～－１．２Ｖ时，不但可连续测定一定浓度范围的重金属Ｃｄ，Ｐｂ，ＣＵ；而且方法灵敏度高，精密良好，线性相关关系可达０．９９９０，回收率达８５－１１５％，获得了良好的分析效果。     

CHLOROPHYLL-BIOMASS-NUTRIENT RELATIONSHIPS FOR NATURAL ASSEMBLAGES OF FLORIDA PHYTOPLANKTON1

Parallel determination of phytoplankton biomass and chlorophyll a concentration were made on spring and summer phytoplankton samples collected from 165 Florida lakes. There was a significant correlation between chlorophyll a concentration and phytoplankton biomass (r=0.80; P < 0.01). Chlorophyll content per unit phytoplankton biomass ranged over two orders of magnitude. Nitrogen seemed to be a major factor influencing the chlorophyll content of Florida algae. Multiple regression analyses indicated that phytoplankton biomass was dependent on both the total phosphorus and total nitrogen concentration. Nutrient-phytoplankton and Secchi-phytoplankton relationships for the Florida lakes had higher coefficients of determination if chlorophyll a concentrations rather than phytoplankton biomass data were used in regression analyses.     

TOXIC EFFECTS OF PETROLEUM AND SHALE JP-4 AND JP-8 AVIATION FUELS ON FATHEAD MINNOWS1

ABSTRACT: Static 96-hour median lethal concentrations were determined for the water-soluble fraction (WSF) of both petroleum-derived and shale-derived avaiation fuels (JP-4 and JP-8) using fathead minnows. JP-8 was more toxic than JP-4 except for one shale JP-4 sample that was as toxic as the JP-8. Petroleum and shale JP-8 were similar in toxicity. The toxicity of shale JP-4 was less clear. Shale JP-4 from three vendor sources revealed differing toxicity values. One shale JP-4 sample was more toxic and one less toxic than its petroleum analogue, with the third being equally toxic. Toxicity of the fuels may be enhanced by compounds in the WSF that correspond to chemicals containing 10 or more carbon atoms.