岳阳南湖水质变化趋势与保护措施研究

应用湖泊完全混合模型和狄龙模型，预测了岳阳经济技术开发区和南湖旅游度假区建成后对有水质的影响，结果表明南湖水质污染将会加剧。根据南湖污染源的情况，文中提出了相应的水质保护措施。     

生化需氧量智能生物检测仪在废水控制分析中的应用

为解决快速测量生化需氧量，生化需氧量智能生物检测仪对多种废水的实际测定表明，操作简单，测量周期为３０ｍｉｎ，精密度为±１０％左右，特别适用于污水处理中控制分析及批量样品的分析测定。     

新试剂P—NPAQ的合成及其与铜的显色反应研究

合成了新试剂5-(4-硝基苯偶氮)-8-氨基喹啉(P-NPAQ),其结构经红外光谱和元素分析证实.研究了P-NPAQ与铜的显色反应及其最佳条件,在Tween60存在下,铜与P-NPAQ在碱性介质中形成1:2的紫红色配合物,其最大吸收峰位于605nm处,摩尔吸光系数ε=5.92 ×10~4l·mol~(-1)·cm~(-1),铜量在0-20μg/25ml范围内符合比尔定律.该方法简便、快速,可不经分离,用于环境样品中铜的测定.     

MgO/SiO_2纳米复合材料同步吸附亚甲基蓝和Cu~(2+)

采用化学沉积法合成了MgO/SiO_2纳米复合材料,通过扫描电子显微镜和X射线能谱分析(SEM-EDX)、X射线衍射(XRD)、Zeta电位仪、FTIR等方法对其进行了表征。研究了MgO/SiO_2对亚甲基蓝(MB)和Cu~(2+)的吸附行为及同步吸附效果。表征结果表明:MgO/SiO_2为褶皱、凸起的球形形貌;MgO成功负载在SiO_2表面。实验结果表明:MgO/SiO_2对MB和Cu~(2+)的吸附符合准二级动力学模型和Langmuir等温吸附模型,MB和Cu~(2+)的饱和吸附量分别为83.72 mg/g和208.70 mg/g;MB和Cu~(2+)的同步吸附在MgO/SiO_2表面存在竞争关系;在溶液体积为30m L、MgO/SiO_2加入量为10 mg、MB质量浓度为10 mg/L或Cu~(2+)质量浓度为100 mg/L、吸附温度为25℃、吸附时间为24 h、初始溶液pH为4.00、解吸时间为4 h的条件下,MgO/SiO_2第1次吸附MB和Cu~(2+)的去除率分别为92.8%和90.1%,第5次吸附的去除率分别为59.6%和57.4%。     

万山汞矿区土壤汞污染及其防治研究

万山汞矿区具有600多年采矿历史,当地的生态破坏问题不容忽视.汞具有挥发性,能在水体、大气、土壤等环境介质中迁移转化,增大了汞污染治理难度.同时汞作为人体非必须的有毒重金属元素,对动、植物及人类具有极大的危害性.在此基础上,探讨了贵州万山汞矿区周边土壤的汞污染现状、来源、形态及其迁移转化规律,提出了相应的治理措施,以期能为今后深入开展汞污染治理研究提供理论依据与技术指导.     

Impact of cleaner production on business performance

Extensive research has examined the relationship between environmental management/performance and business performance but yielded no conclusive results. This paper makes two contributions to the literature. First, instead of focusing on one aspect, we try to compare using various types of cleaner production activities: low- and high-cost activities. Second, the study complements the existing literature which focuses on firms in developed countries with an analysis of firms in the Chinese manufacturing industry. In this paper, the relationship between cleaner production and business performance was analyzed using Structure Equation Model (SEM). We find an overall positive impact of cleaner production on firm's business performance. We also found that the cleaner production activities of low-cost scheme have a bigger contribution to financial performance compared to non-financial performance, while cleaner production activities of high-cost scheme have a greater contribution to non-financial performance, compared to financial performance. This study should be useful for firms that consider adopting cleaner production as well as stakeholders who aim to promote cleaner production.     

The chronic effects of oil pollution on marine phytoplankton in a subtropical bay, China

To evaluate the effects of crude oil water accommodated fraction (WAF) on marine phytoplankton community, natural phytoplankton collected seasonally from the Yueqing bay were exposed to eight groups of crude oil WAF for 15 days under laboratory conditions. Chlorophyll a and cell density were measured, and species of phytoplankton were identified every 24 h to reflect the change of phytoplankton community. The results showed that (1) High concentrations (??2.28 mg l^???1) of oil pollution would greatly restrain phytoplankton growth (p?< 0.001), decrease chlorophyll a content and cell density, whereas low concentrations (??1.21 mg l^???1) did not restrain its growth but rather promoted the phytoplankton growth. (2) The biodiversity, evenness, and species number of phytoplankton were all significantly influenced by crude oil WAF in all seasons (p?<?0.001). (3) The dominant species changes were different under different pollutant concentrations in different seasons. Different species had different tolerances to the oil pollution, thus leading to abnormal succession.     

The extract of aquatic macrophyte Carex cinerascens induced colony formation in bloom-forming cyanobacterium Microcystis aeruginosa

Environmental Science and Pollution Research - Colony formation in Microcystis aeruginosa played important roles in blooms formation. To study the effects of plant allelopathy on colony formation...     

微波强化内电解处理活性艳红染料废水

提出了一种微波强化内电解处理染料废水的新方法,结果表明:微波不仅可以再生炭铁混合物,而且可以氧化分解活性炭吸附的染料;铁屑不仅与活性炭构成内电解作用,同时还可以促进微波再生活性炭;微波作用多次后炭铁混合物对废水的去除率仍能保持色度去除率99%、COD去除率64%;同时探讨了微波作用时间、微波作用次数、铁屑粒径、炭铁比例和pH值等因素对废水去除率的影响,并初步探讨了其反应机理。