巢湖藻华易堆积区蓝藻时空分布的研究

巢湖西半湖采样分析结果表明夏季蓝藻水华主要集聚于湖滨带。因此选择西半湖藻华易堆积的区域，并监测在风力驱使下蓝藻水华的时空分布规律，分析湖滨带浮游植物生物量与理化因子的相关性。结果表明：湖滨带水华生物量的分布容易受到风向和天气的影响；水体的叶绿素a浓度与总氮（TN）、总磷（TP）和高锰酸钾指数（CODMn）呈显著的正相关（p<001）；湖滨带水体中微囊藻（Microcystis）的生物量几乎占据水体总浮游植物生物量的95%以上，而且越靠近湖岸带微囊藻的生物量所占的比例越大。据此，可以选择湖滨带水华易聚集区作为蓝藻水华尤其是微囊藻去除的重点区域，以有效地削减蓝藻水华污染，从而为巢湖水生态系统的修复创造条件     

Enhanced mercuric chloride adsorption onto sulfur-modified activated carbons derived from waste tires

A number of activated carbons derived from waste tires were further impregnated by gaseous elemental sulfur at temperatures of 400 and 650 degrees C, with a carbon and sulfur mass ratio of 1:3. The capabilities of sulfur diffusing into the micropores of the activated carbons were significantly different between 400 and 650 degrees C, resulting in obvious dissimilarities in the sulfur content of the activated carbons. The sulfur-impregnated activated carbons were examined for the adsorptive capacity of gas-phase mercuric chloride (HgC1) by thermogravimetric analysis (TGA). The analytical precision of TGA was up to 10(-6) g at the inlet HgCl2 concentrations of 100, 300, and 500 microg/m3, for an adsorption time of 3 hr and an adsorption temperature of 150 degrees C, simulating the flue gas emitted from municipal solid waste (MSW) incinerators. Experimental results showed that sulfur modification can slightly reduce the specific surface area of activated carbons. High-surface-area activated carbons after sulfur modification had abundant mesopores and micropores, whereas low-surface-area activated carbons had abundant macropores and mesopores. Sulfur molecules were evenly distributed on the surface of the inner pores after sulfur modification, and the sulfur content of the activated carbons increased from 2-2.5% to 5-11%. After sulfur modification, the adsorptive capacity of HgCl2 for high-surface-area sulfurized activated carbons reached 1.557 mg/g (22 times higher than the virgin activated carbons). The injection of activated carbons was followed by fabric filtration, which is commonly used to remove HgCl2 from MSW incinerators. The residence time of activated carbons collected in the fabric filter is commonly about 1 hr, but the time required to achieve equilibrium is less than 10 min. Consequently, it is worthwhile to compare the adsorption rates of HgCl2 in the time intervals of < 10 and 10-60 min.     

流域经济增长空间分异研究——基于2001～2009年长江流域数据的面板计量分析

流域经济是以水系为轴线的区域经济，其发展状况对国民经济有重要影响，其研究为区域开发提供新视角。在理论方法上，根据内生经济增长理论，采用柯布 道格拉斯生产函数，构建一个包括技术进步、物质资本和人力资本作为内生要素的流域经济增长框架。在实践论证上，以长江为样本域，运用面板计量分析方法，测度生产要素对流域上中下游经济增长的影响。结果显示：不同生产要素对流域经济不同域段作用强度不同，且呈现出明显的梯度效应，即沿江而下，技术进步和人力资本对经济增长的贡献度逐渐加大，物质资本则恰好相反。在此基础上，提出缩小流域经济的不平衡程度的政策建议，主要包括促使流域上游地区人力资本开发、实施流域大开发战略和推进流域城市化等     

改性蚁酸木质素的制备与应用

采用加拿大一枝黄花茎杆为原料提取蚁酸木质素，通过氧化或接枝复合的方法对蚁酸木质素进行改性，对改性产物进行了FTIR和SEM表征。实验结果表明：接枝复合改性产物中存在-CONH的接枝复合链，氧化改性产物基本保持了蚁酸木质素原来的吸收峰；采用接枝复合改性产物处理初始质量浓度为50 mg/L的亚甲基蓝废水，在废水pH 7、吸附时间4 h、改性产物加入量22 mg/mL的条件下，亚甲基蓝去除率为90.94%；采用氧化改性产物处理相同亚甲基蓝废水，在废水pH 10、吸附时间12 h、改性产物加入量22 mg/mL的条件下，亚甲基蓝去除率为81.93%。     

南京北郊春季气溶胶吸湿性分析

大气气溶胶的吸湿性对气溶胶粒子的谱分布、云凝结核形成、气候强迫、人体健康等均有重要的影响.利用吸湿性串联差分迁移率分析仪(HTDMA)在2014年4月16日~5月21日对南京北郊的大气气溶胶吸湿特性进行观测.30~230 nm气溶胶粒子在90%相对湿度下的吸湿增长观测结果表明,气溶胶粒子的吸湿增长因子平均概率分布函数(GF-PDF)呈现明显的双峰分布,即一个占主导地位的强吸湿模态,和一个相对较小但仍很明显的弱吸湿模态.对吸湿性的日夜对比分析发现,整体上白天的气溶胶粒子吸湿性大于夜间气溶胶粒子,白天强吸湿模态的粒子数目比例高于夜间,夜间气溶胶粒子的外混合程度更高.利用HYSPLIT模式对气溶胶来源分析结果表明,观测期间南京北郊主要受到3类气团的影响.其中西北大陆气团背景下爱根核模态粒子在经过大陆的长距离输送过程后,老化程度较高,吸湿性也更强.而对于积聚模态粒子,则为来自东方气团的粒子吸湿性更强,强吸湿模态粒子数目比例也较高.局地气团背景下气溶胶粒子在各粒径段都具有较高的强吸湿比例.     

Efficient mineralization of gaseous benzyl chloride by VUV/UV photodegradation in humid air

Environmental Science and Pollution Research - VUV/UV photodegradation technology, which is free of catalysts or oxidants, has been regarded as an efficient method to decompose gaseous VOCs....     

Physical infrastructure,energy consumption,economic growth,and environmental pollution in Pakistan: an asymmetry analysis

Environmental Science and Pollution Research - This study explores the symmetric and asymmetric effects of physical infrastructure on energy consumption, economic growth, and air pollution of...     

Development of highly efficient and reusable magnetic nitrogen-doped carbon nanotubes for chlorophenol removal

Environmental Science and Pollution Research - Nitrogen-doped carbon nanotubes (N-CNTs) were synthesized via a hydrothermal method and further modified with magnetic Co0.5Cu0.5Fe2O4 nanoparticles...     

Synthesis of Ni-doped anatase TiO2 single crystals loaded on wood-based activated carbon for enhanced photodegradation of triphenylmethane dyes

Environmental Science and Pollution Research - In this work, the Ni-doped anatase TiO2 single crystals loaded on activated carbon (Ni-T/AC) were synthesized by a sol–gel method. The chemical...     

The catalytic performance of Cu46Zr47-xAl7Yx amorphous ribbons in the degradation of AO II dye wastewater

Environmental Science and Pollution Research - Metallic glasses (MGs) with unique disordered atomic stacking structures exhibit excellent catalytic performance in wastewater treatment. The...