川西气田采气污水的特点与治理措施的探讨

对川西气田采气污水的污染状况进行了分析,认为应采取集中污水处理达标后外排的处理模式.针对川西采气污水的特点,提出了一套处理工艺.     

嘉兴市污水海洋处置工程近区稀释度变化研究

针对嘉兴市污水海洋处置工程拟选的场前 0 0 0 0和场前 0 14 0 0两个排放口 ,对一个潮位过程中污水近区初始稀释度的变化进行了物理模型试验研究 ,以国家二类海水水质标准 (GB 30 97 82 )作为控制依据 ,根据稀释度变化过程线计算出了 2 4h内可以满足二类海水水质标准的时间。试验结果表明 ,场前 0 14 0 0排放口处的近区稀释扩散效果最好。     

油田企业推行HSE管理体系存在的问题和对策

简要介绍胜利油田等油田行业推行HSE管理体系的情况，分析实施过程中存在的问题，提出针对性的解决措施，侧重研究HSE实施过程中环保工作存在的问题和解决措施，指出推行清洁生产和IS014000管理体系能够有效促进HSE管理体系中环保内容的实施。     

Contribution of winter fluxes to the annual CH4, CO2 and N2O emissions from freshwater marshes in the Sanjiang Plain

Introduction C arbon dioxide, m ethane and nitrous oxide play im portant roles in the radiation balance of the earth contributing to the greenhouse effect (Rodhe, 1990). N 2O also takes part in the destruction of stratospheric ozone (W ang, 1999). N atura…     

超声辐射Fenton试剂耦合法降解直链十二烷基苯磺酸钠的研究

对超声辐射Fenton试剂耦合法降解水中直链十二烷基苯磺酸钠进行了研究。采用单因子法考察了硫酸亚铁用量，氧化剂H2O2用量，超声辐射反应温度和初始溶液pH值等因素对降解率的影响；采用正交试验法优化降解条件，得出了各因素影响的显著性次序。在环境压力下，超声辐射频率40kHz，超声辐射功率500W，反应时间15min，反应温度95℃，溶液起始pH值3，降解物起始质量浓度200mg／L，硫酸亚铁与双氧水质量浓度分别为O．65g／L和1．2g／L的最佳降解条件下，十二烷基苯磺酸钠的降解率可达99．31％。研究结果表明：超声波辐射Fenton试剂耦合法是一种有效的降解十二烷基苯磺酸钠的方法。与Fenton试剂氧化催化法相比，能够显著地缩短反应时间，提高降解率。     

雪峰古陆西南缘区域地球化学场对成矿的控制作用

研究区内不同时代的地层中 ,元素Au、Ag、Sb、Cu、Pb、Zn等具有不同的含量及统计参数特征 ,在区域上构成了 2个大的地球化学场和 1 0个次级场 ,它们控制了不同类型矿床的分布 ,显示了地球化学场与成矿的内在联系     

黑龙江省生态环境现状遥感野外核查

为了解黑龙江省的自然资源及生态环境,对黑龙江省进行了生态环境现状遥感野外核查.在充分论证了核查路线的科学性及合理性后确立了355个核查点,并利用遥感技术和地理信息技术对其进行了复核,核查成果对黑龙江省生态环境的规划、管理和决策起到了辅助作用.     

一个设计海洋标量场中观测点空间分布的方法

本文给出一个计算标量场中变量在分析点上的真值与这一点上分析值之间偏差的方法，使用这个方法，通过试错调整观测点的分布，可以设计出标量场中观测点空间结构的理想阵列。使用该阵列有限个点上的观测值可以客观地分析出该变量的瞬间空间分布，使它与其真值之间的偏差达到最小值。     

Secondary effect of SO_2 pollution: enhanced growth of the army worm, Mythimna separata (Walker)

Effects of SO2 pollution on growth of the army worm, Mythimna separata, were investigated by rearing the larvae for 12 days on the wheat plants being exposed to SO2 levels ranged from 50 to 200 ppb in the field open-top fumigation devices. Larval period shortened while their mean relative growth rate (MRGR) increased as SO2 dose elevated. Similar experiment with the insect on the artificial diet excluded the possibility that SO2 pollution directly stimulated growth of the army worm.The patterns of change in amino acid hydrolysates in the host foliage suggested that contents of methionine, and perhaps, arginine in food material exposed to unpolluted air were at such levels that they could only support sub-optimum growth of the insect, and SO2 pollution increased concentrations of these limiting amino acids, resulting in better performance of the larvae.     

Secondary effect of SO2 pollution: enhanced growth of the army worm, Mythimna separata (Walker)

Effects of SO₂ pollution on growth of the army worm, Mythimna separata, were investigated by rearing the larvae for 12 days on the wheat plants being exposed to SO₂ levels ranged from 50 to 200 ppb in the field open-top fumigation devices. Larval period shortened while their mean relative growth rate (MRGR) increased as SO₂ dose elevated. Similar experiment with the insect on the artificial diet excluded the possibility that SO₂ pollution directly stimulated growth of the army worm.The patterns of change in amino acid hydrolysates in the host foliage suggested that contents of methionine, and perhaps, arginine in food material exposed to unpolluted air were at such levels that they could only support sub-optimum growth of the insect, and SO₂ pollution increased concentrations of these limiting amino acids, resulting in better performance of the larvae.