大型浅水湖泊富营养化国际研讨会在南京举行     

秦伯强 《湖泊科学》2005,17(2):138-138

2005年4月24日至26日,大型浅水湖泊富营养化国际研讨会在南京顺利召开.包括国际理论与应用湖沼学会执行副主席Brian Moss教授、《Ecological Modelling》主编S.E.J φrgensen教授、《Ecological Engi- neering》主编Williams Mitsch教授等来自美、德、奥、丹、荷等20余国的代表约200人出席了会议.大会共收到论文136篇.大会邀请了三位教授作了大会主题发言,分别是刘正文教授(太湖生态环境状况)、Brian Moss教授(湖泊生态修复的发展现状)和Williams Mitsch教授(湿地与浅水湖泊的模拟与管理)会议按五个主题进行专题交流,大会报告有:(1)湖泊物理过程及其生态环境效应:David Hamilton(物理要素对蓝藻  相似文献   

天然锰钾矿处理含Cd^2＋废水实验研究   总被引：5，自引：2，他引：5       下载免费PDF全文

郑德圣  鲁安怀高翔赵谨  马生凤 《岩石矿物学杂志》2003,22(4):360-364

利用天然锰钾矿处理实验室内配置的含Cd^2 废水，结果表明：天然锰钾矿对水溶液中Cd^2 的去除达平衡需2d以上；锰钾矿粒径越小对Cd^2 的去除量越大；溶液中例Cd^2 的浓度不太高时，去除量随溶液浓度的升高而增大；在酸性介质中去除量随pH值增大先降低后增大，pH值超过6．3时天然锰钾矿表面开始带负电荷，在弱碱性介质中去除量最大；不同电解质对去除量的的影响主要是由Cl^-与Cd^2 的络合造成的。实验浓度范围内能很好地用Langmuir吸附等温线拟合，对Cd^2 0的最大吸附量为5．54mg/g。锰钾矿处理含Cd^2 废水的过程中伴随有K^ 和Mn^2 溶出。处理Cd^2 后的锰钾矿渣，经超声并淋滤后仍有大部分的Cd^2 被固持，固持率可达去除量的79．82％。  相似文献   

电法勘探在地下水污染调查监的应用及前景   总被引：4，自引：0，他引：4  

陈本池  李金铭 《国外地质勘探技术》1997,(3):1-8

本文在概述电法勘探探测地下水污染的地球物理基础上，列举了目前国外利用电法成 功探测地下污染的一些典型实例，并对应用中存在的问题及前景作了简要分析。  相似文献   

重金属在水环境中形态分布的随机模拟   总被引：6，自引：0，他引：6  

蔡绪贻  林黎虹 《中国地质灾害与防治学报》1997,8(2):40-47

水环境中重金属的毒性，生物可给性，以及活性均与其存在形态密切相关。而重金属的存在形态是由其容量控制参数决定的。水环境中，重金属的容量控制参数在空间上和时间上发生随机变化。本文的目的在于研究容量控制参数的随机变化对重金属形态分布的影响。作者以洋河汞污染为例，将形态分布模型同Ｍｏｕｔｅ Ｃａｒｌｏ方法相结合模拟了河水中ｐＨ值，有机质浓度，总汞含量，以及悬浮物含量的随机变化对汞形态分布的影响。研究结果表  相似文献   

充分发挥水体自净能力 综合治理水体污染     

王乃益 《安徽地质》1997,(4)

水体污染的危害涉及很多方面，由于工业废水、生活污水和农田广泛使用农药等使各类有毒有害物质进入水体，导致水质不断恶化，使淡水湖泊的富营养化、水生生物的生境平衡遭受破坏、水产品产量下降、大量排放含酸废水的后果，使水工建筑物及其附属设施造成腐蚀等等。由于生物链富集作用，鱼类、贝类体内有害金属及其化合物的含量可比水体浓度增高几十倍甚至上千倍。中某些有害无素大量积聚，曾引起过水俣病、痛痛病和肠道传染病等公害疾病的发生。因此，水污染已经直接或间接制约了国民经济的持续发展和严重威胁到居民和生活与健康，必须从根本上治理水污染是迫在眉睫的百年大计，是造福子孙后代的大事。本文提出充分发挥水体自净能力，综合治理水体污染的原理和方法。  相似文献   

厦门YunDang湖综合治理的生态效果   总被引：2，自引：0，他引：2  

卢振彬  杜琦 《台湾海峡》1997,16(3):306-310

本文报道了１９９３年厦门ＹｕｎＤａｎｇ湖生态调查的结果，并与１９８２年比较，主人服１０ａ来综合治理的生态效果，同时分析了目前水生生物种类，数量，群落结构和生态特征及水质指标与渔业水质标准的差距，指出当有ＹｕｎＤａｎｇ湖水体仍属严重污染，生态仍较脆弱，还提出了进一步强化治理的４点建议。  相似文献   

东南亚水产养殖与环境     

海晶 《海洋信息》1990,(3):17-19

  相似文献   

Characterization of arsenic-contaminated groundwater and human health risk assessment in Vietnam     

Van Anh Nguyen Sunbaek Bang Kyoung-Woong Kim 《中国地球化学学报》2006,25(B08):74-74

The characteristics of arsenic-contaminated groundwater were investigated and the potential risks from groundwater were evaluated in Vietnam. Arsenic contamination in groundwater was found in Ha Nam Province in the northern part of Vietnam. Since groundwater has been used as one of the main drinking water sources in this region, groundwater （n=10） and hair （n=15） samples were collected in the Vinh Tru district, Ha Nam Province, during February of 2006. At the site, the concentrations of anions and silica were analyzed and As（Ⅲ） and As（Ⅴ） species in groundwater were separated with disposable arsenic speciation cartridge. The concentrations of arsenic in groundwater ranged from 13 to 582 μg/L （mean=366 μg/L）. According to the results of arsenic speciation, approximately 90% of arsenic in groundwater existed as As（Ⅲ） species. Average concentrations of iron and manganese were 18 and 0.7 mg/L, respectively. All samples exceeded the Vietnamese drinking water standard of 10μg/L for arsenic and 0.5 mg/L for iron. Also 70% of the groundwater samples were above the Vietnamese drinking water standard of 0.5 mg/L for manganese. However, a real intake of arsenic to human is less than analyzed arsenic concentration because sand filtration units are used to remove iron and arsenic in groundwater in this region. After treatment, arsenic concentrations decreased from 〈1 to 82 μg/L （mean=33 μg/L）. The concentrations of arsenic in hair samples and treated groundwater were compared. Especially, arsenic concentrations in female hair samples and treated groundwater had significantly positive correlation with the Spearman correlation of 0.88 and the P-value of 0.001. Based on the arsenic concentrations in treated groundwater, the assessment of human health risks was conducted.  相似文献   

Evaluation of ability of Rock Check Dam to prevent the transportation of Pb-contaminated sediment in Khli Ti Creek, Thailand     

Paweena Panichayapichet Suwanchai Nitisoravut Arpa Wangkiat 《中国地球化学学报》2006,25(B08):119-120

Discharge of wastewater from the retaining pond of a Pb ore-flotation plant since 1967 and breaching of the retaining pond in April 1998 contaminated 17540 cbm of river bank sediment with 833 ton Pb, nearly 19 km along the Khli Ti Creek. High blood Pb concentration was detected in many inhabitants. Prohibition of water and aquatic biota consumption has caused difficulties for rural people to make their ends meet. The governmental agency closed the ore-floatation plant and built 2 rock check dams downstream. The dam was designed to slow down water velocity and precipitate particulate matter. Contaminated sediments that have been trapped in front of the dam were planned to be dredged and disposed in landfill. Until now, no dredging is performed because some experts claim that dredging will resuspend the contaminated sediment into the water column, and fresh sediment deposited during periods of high flow will cover the contaminated sediment. The aim of this study was to evaluate the ability of the rock check dam to prevent the transportation of Pb-contaminated sediment in the Khli Ti Creek. Sediment located before and after the rock check dam and 2 km downstream were collected in September 2003 and May 2005. During September 2003, Pb concentrations in sediment deposited before and after the rock check dam and 2 km downstream were 48840, 53741 and 36020 mg/kg, respectively. These results showed that Pb-contaminated sediment was transported over the first rock check dam but still remained after the rock check dam. Result of May 2005 sampling also showed the same trend, although with different ranges due to seasonal variation, types of collected sediment, sample preparation and analytical techniques. Pb concentrations in sediment were 209684, 306775 and 33760 mg/kg, respectively.  相似文献   

The effect of lead on the activity of carbon-fixation enzymes in Potamogeton pectinatus     

Qing LIN Xinying ZHANG Guijin LU 《中国地球化学学报》2006,25(B08):215-216

Lead is one of the major heavy-metal contaminants in water environments. It can exert a stress on the growth of submersed plants through changing the activities of carbon-fixation enzymes in their photosynthesis. In this work, a worldwide distributed species of submersed plants- Potamogeton pectinatus, which can survive in different water environments such as in Dianchi Lake, a severe eutrophic lake, was cultivated in improved Hoagland＇s solution and treated with different concentrations of lead. In order to realize the effect of lead on the photosynthesis of this plant, the chlorophyll contents were determined and the activities of carbon-fixation enzymes including ribulose bisphosphate carboxylase （RuBPc）, phosphoenolpyruvate carboxylase （PEPc） and carbonic anhydrase （CA） were analyzed.  相似文献