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91.
Chowdhury AG Das C Kole RK Banerjee H Bhattacharyya A 《Environmental monitoring and assessment》2007,131(1-3):467-473
A detailed study has been presented on heavy metal content of the Iture Estuary. Waters of the Sorowie and Kakum rivers that
supply water into the Estuary were investigated to ascertain heavy metal pollution levels due to anthropogenic activities.
Concentration s of Cd, Zn, Se and Pb were measured. The study shows pre-occupying pollution levels that constitute a threat
to both terrestrial and aquatic ecosystems. The abundance of metals in the Estuary is in the order Zn > Pb > Cd > Se. The
level of Cd in the Iture Estuary ranged between 0.011 mg/l and 0.041 mg/l while Se was in the range 0.018 mg/l to 0.029 mg/l,
Pb 0.020 mg/l to 0.075 mg/l and Zn 0.040 to 2.45 mg/l. The impact of contaminated water from the Sorowie River on the Iture
Estuary was outstanding and the study points out the importance of the Sorowie River as a primary pollution source to the
Iture Estuary. The pollution of the Iture Estuary was found to be connected to human activities in its catchments. 相似文献
92.
Almeida CA Quintar S González P Mallea MA 《Environmental monitoring and assessment》2007,133(1-3):459-465
A study of the water quality of the Potrero de los Funes River (San Luis – Argentina) was carried out in order to evaluate
the possible effect of the anthropogenic activities on the river developed in the homonymous town. Samples were collected
during the period March 2000–November 2005 at three selected sampling sites (RP1, RP2 and RP3). Different physicochemical and bacteriological parameters (turbidity, pH, conductivity, suspended solids, alkalinity, potassium,
sodium, calcium, magnesium, chlorides, nitrates, phosphates, sulphates, chemical oxygen demand (COD), 5-day biological oxygen
demand (BOD5), dissolved oxygen, total coliforms, Escherichia coli and total heterotrophic bacteria) were analysed according to the Standard Method for the Examination of Water and Wastewater.
When comparing the values of total coliforms, E. coli, total heterotrophic bacteria, COD, BOD5 and phosphates from the zone without anthropogenic influence (RP1) and the urban zones (RP2 and RP3) an important variation in the parameters was observed. These results indicate that the urban activity produces a serious
and negative effect on the water quality, thus constituting a sanitary risk and may have a major impact on the trophic status
of the Potrero de los Funes dam. As case study, we report on the use of General Quality Index (GQI) to evaluate spatial and
seasonal changes in the water quality of Potrero de los Funes River. Results revealed a significant degradation of the water
quality at RP2 and RP3. 相似文献
93.
日益突出的臭氧(O_3)污染已成为继PM2. 5之后我国大气污染防治的又一艰巨任务。由于氮氧化物(NO_x)、挥发性有机物(VOCs)这2种前体物的减排难度较大,且与O_3浓度存在复杂的非线性关系,准确获取O_3及NO_x、VOCs的时空分布对制定有效的防控措施至关重要。基于卫星遥感可定量反演O_3及2种前体物的代表性物种——二氧化氮(NO_2)、甲醛(HCHO)及乙二醛(C_2H_2O_2)的时空分布信息。面向区域O_3污染分析和防控应用,综述了卫星遥感对O_3及NO_2、HCHO、C_2H_2O_2的探测能力,以及利用遥感手段分析区域O_3及其前体物的传输。进而从O_3与NO_x、VOCs关系的角度,分析了利用卫星反演的前体物表征O_3生成风险的可行性。最后对卫星在区域O_3及其前体物监测方面的前景趋势提出了思考。 相似文献
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镁砂行业的污染主要以烟尘、烟气为主。本文针对镁砂行业的治理和管理进行了探索和分析并提出了对策和建议。 相似文献
96.
云南省环境库兹涅茨特征研究 总被引:2,自引:0,他引:2
根据云南省1985~2003年历年环境污染指标的统计数据和历年人均GDP统计数据,对人均GDP与环境污染(工业"三废"排放量)作相关分析,建立两者之间的计量模型,并在此基础上分析工业"三废"排放量与人均GDP增长的关系。经研究发现,云南省经济增长与环境污染基本符合环境库兹涅茨曲线,人均GDP与工业废水排放量曲线和人均GDP与工业固体废弃物排放量曲线均已处于倒U型曲线的右半段,并随人均GDP的增长而呈下降趋势,曲线走势良好;人均GDP与工业废气排放量曲线则处于倒U型曲线的左半段,且尚未达到转折点,随着经济的增长,工业废气排放量将呈上升趋势。但从总体而言,云南省工业环境状况总体上呈逐步好转趋势。 相似文献
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In mine water pollution abatement, it is commonly assumed that known mine waste sites are the major pollution sources, thus neglecting the possibility of significant contribution from other old and diffuse sources within a catchment. We investigate the influence of different types of pollution source uncertainty on cost-effective allocation of abatement measures for mine water pollution. A catchment-scale cost-minimization model is developed and applied to the catchment of the river Dalälven, Sweden, in order to exemplify important effects of such source uncertainty. Results indicate that, if the pollution distribution between point and diffuse sources is partly unknown, downstream abatement measures, such as constructed wetlands, at given compliance boundaries are often cost-effective. If downstream abatement measures are not practically feasible, the pollution source distribution between point and diffuse mine water sources is critical for cost-effective solutions to abatement measure allocation in catchments. In contrast, cost-effective solutions are relatively insensitive to uncertainty in total pollutant discharge from mine water sources. 相似文献