城市社会体育志愿者组织建设的实践性研究——以秦皇岛市社会体育志愿者组织为例

应用文献资料法、问卷调查法、实证研究法,探讨了城市社会体育志愿者组织建设的方法策略,即以高校社会体育专业成立志愿者分队为基点,依托当地已有的志愿者组织平台,融合吸纳更多的社会体育志愿者加入社会体育志愿者大队。通过社会体育志愿者分队的组建及服务项目的实施,为政府落实《建立全民健身志愿服务长效化机制工作方案》提供参考意见,同时也为提高社会体育专业学生的专业能力和人文素养搭建平台。     

一体化臭氧-曝气生物滤池处理酸性玫瑰红印染模拟废水

针对含酸性玫瑰红印染废水高色度、难生物降解的特点,分别采用了一体化和分离式臭氧-曝气生物滤池(O3-BAF)工艺处理。与分离式工艺相比,一体化工艺的特点是在一个反应器内部同时实现臭氧氧化和生化的协同作用,降低了处理设施的基建和运行费用。实验结果表明,一体化工艺处理效果明显优于分离式工艺,脱色率达92%,COD去除率达60%,处理效果良好。     

Fe-MCM-41催化氧化2,4-二氯苯氧乙酸

采用水热法合成了Fe-MCM-41中孔分子筛,紫外、红外及XRD表征显示铁离子已进入中孔分子筛骨架。以H2O2为氧化剂形成类Fenton试剂,实验结果表明,在催化剂加入量为1 g/L、H2O2体积分数为6%、pH为4、反应时间为10h、反应温度为35℃的条件下,处理质量浓度为50 mg/L的2,4-D废水的降解率达94.95%。宏观动力学研究显示,该反应近似为一级反应,反应速率常数、表观活化能分别为0.21667 min-1和26.65 kJ/mol。     

浅谈建筑施工噪声的网络化管理

通过《南宁市环境信息综合管理系统》中建筑施工噪声管理子系统的重点研究和建设,对建设施工项目审批、中午夜间施工许可登记及施工噪声投诉实时监控,加强监督,改善了管理环节,提高了管理效能,取得了良好的效果。     

Estimating Forest Ecosystem Evapotranspiration at Multiple Temporal Scales With a Dimension Analysis Approach1

Abstract:  It is critical that evapotranspiration (ET) be quantified accurately so that scientists can evaluate the effects of land management and global change on water availability, streamflow, nutrient and sediment loading, and ecosystem productivity in watersheds. The objective of this study was to derive a new semi‐empirical ET modeled using a dimension analysis method that could be used to estimate forest ET effectively at multiple temporal scales. The model developed describes ET as a function of water availability for evaporation and transpiration, potential ET demand, air humidity, and land surface characteristics. The model was tested with long‐term hydrometeorological data from five research sites with distinct forest hydrology in the United States and China. Averaged simulation error for daily ET was within 0.5 mm/day. The annual ET at each of the five study sites were within 7% of measured values. Results suggest that the model can accurately capture the temporal dynamics of ET in forest ecosystems at daily, monthly, and annual scales. The model is climate‐driven and is sensitive to topography and vegetation characteristics and thus has potential to be used to examine the compounding hydrologic responses to land cover and climate changes at multiple temporal scales.     

Watershed Evapotranspiration Increased due to Changes in Vegetation Composition and Structure Under a Subtropical Climate1

Abstract: Natural forests in southern China have been severely logged due to high human demand for timber, food, and fuels during the past century, but are recovering in the past decade. The objective of this study was to investigate how vegetation cover changes in composition and structure affected the water budgets of a 9.6‐km² Dakeng watershed located in a humid subtropical mountainous region in southern China. We analyzed 27 years (i.e., 1967‐1993) of streamflow and climate data and associated vegetation cover change in the watershed. Land use/land cover census and Normalized Difference of Vegetation Index (NDVI) data derived from remote sensing were used to construct historic land cover change patterns. We found that over the period of record, annual streamflow (Q) and runoff/precipitation ratio did not change significantly, nor did the climatic variables, including air temperature, Hamon’s potential evapotranspiration (ET), pan evaporation, sunshine hours, and radiation. However, annual ET estimated as the differences between P and Q showed a statistically significant increasing trend. Overall, the NDVI of the watershed had a significant increasing trend in the peak spring growing season. This study concluded that watershed ecosystem ET increased as the vegetation cover shifted from low stock forests to shrub and grasslands that had higher ET rates. A conceptual model was developed for the study watershed to describe the vegetation cover‐streamflow relationships during a 50‐year time frame. This paper highlighted the importance of eco‐physiologically based studies in understanding transitory, nonstationary effects of deforestation or forestation on watershed water balances.     

江苏数字地震台网台址噪声谱分析

江苏数字地震台网已建设改造了 8个台站。对 8个台站记录到的背景噪声进行定量分析 ,测定背景噪声的地动速度均方根值 (RMS)、有效测量动态范围 (D有效)和噪声功率谱。结果表明 :受台基和海潮等观测环境的影响 ,大部分台站的地动速度RMS值高于 2 × 1 0 -8m/s,降低D有效 值。背景噪声功率谱峰值频率为 2 5～ 3 0Hz。这些定量分析为了解数字地震台网的实际监测水平提供了可靠依据     

常熟-太仓M5.1地震精定位及震源机制解

通过定位模型、定位方法和地震震相的合理选择 ,采用更加合理的台网布局的地震资料 ,对1990年 2月 10日常熟M 5 1地震进行了精定位 ,得到更为精确、合理的该地震三要素。通过对原震源机制解的复核 ,原定结果可以不变     

水杨酸钠-次氯酸钠法海水氨氮快速检测方法研究

对水杨酸钠-次氯酸钠法测量海水氨氮化学分析条件进行了研究。通过正交实验对水杨酸钠-次氯酸钠法试剂配比进行优化,并确定了最佳试剂配比。同时,用水杨酸钠-次氯酸钠法和靛酚蓝法测量24个海水水样,测量结果无显著差异。在反应温度为35℃,反应时间为10 min时,用改进后的方法分别测量60、120μg/L的氨氮标准溶液,相对标准偏差分别为4.0%、2.8%,回收率分别为99.8%、100.8%。该方法试剂无毒、环保,操作简单、快速,可满足营养盐自动分析仪现场快速测量的要求,提高仪器的环境友好性。     

Penicillin fermentation residue biochar as a high-performance electrode for membrane capacitive deionization

● We have provided an activated method to remove the toxicity of antibiotic residue. ● PFRB can greatly improve the salt adsorption capacity of MCDI. ● The hierarchical porous and abundant O/N-doped played the key role for the high-capacity desalination. ● A new field of reuse of penicillin fermentation residue has been developed. Membrane capacitive deionization (MCDI) is an efficient desalination technology for brine. Penicillin fermentation residue biochar (PFRB) possesses a hierarchical porous and O/N-doped structure which could serve as a high-capacity desalination electrode in the MCDI system. Under optimal conditions (electrode weight, voltage, and concentration) and a carbonization temperature of 700 °C, the maximum salt adsorption capacity of the electrode can reach 26.4 mg/g, which is higher than that of most carbon electrodes. Furthermore, the electrochemical properties of the PFRB electrode were characterized through cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) with a maximum specific capacitance of 212.18 F/g. Finally, biotoxicity tests have showed that PFRB was non-biotoxin against luminescent bacteria and the MCDI system with the PFRB electrode remained stable even after 27 adsorption–desorption cycles. This study provides a novel way to recycle penicillin residue and an electrode that can achieve excellent desalination.