Evolution and interaction of ecological civilization construction pattern from the perspective of path dependence–based on the panel data of Jiangsu Province,China

Environment, Development and Sustainability - Ecological civilization is an advanced form after industrial civilization. Improving China's ecological civilization system will provide developing...     

Role of interaction between selenium and organic matters on causes of Kaschin-Beck disease

Influences of organic matters of soil and water on speciation and biological utilization of selenium are discussed. Humic acid is found to be the main pool of selenium in soil and affects the bio-availability of the element in soil-plant system. Fulvic acid from drinking water inhibits the absorption of selenium taken from diet. The relationship between high content of organic matters of water and selenium deficiency on the causes of KBD could be reflected in the limited synthesis of glutathione peroxidase, which is generally stimulated by fulvic acid from drinking water.     

川西草原十字花科油料植物资源的研究和利用

首次对四川西部草原的野生十字花科油料植物资源作了比较系统的调查研究,收集植株和种子标本约12属20种。经过种子油分分析和引种观察,筛选出几种有特种用途且适应力较强的植物资源。这些植物资源是蕴藏量大的食用油料播娘蒿(Descurainia sophia)、菥蓂(Thlaspi arvense),高亚油酸的优质食用油料植物高蔊菜(Rorippa elata),高亚麻酸的工业用油料植物涩荠(Malcolmia africana)、独行菜(Lepidiumapetalum)等。可供进一步的开发利用。     

Simultaneous nitrification and denitrification in activated sludge system under low oxygen concentration

Simultaneous nitrification and denitrification (SND), which is more economical compared with the traditional method for nitrogen removal, is studied in this paper. In order to find the suitable conditions of this process, a mixed flow activated sludge system under low oxygen concentration is investigated, and some key control parameters are examined for nitrogen removal from synthetic wastewater. The results show that SND is accessible when oxygen concentration is 0.3–0.8 mg/L. The nitrogen removal rate can be obtained up to 66.7% with solids retention time (SRT) of 45 d, C/N value of 10, and F/M ratio of 0.1 g COD/(g MLSS·d). Theoretical analysis indicates that SND is a physical phenomenon and governed by oxygen diffusion in flocs. Translated from Environmental Pollution and Control, 2004, 26(1): 11–13 [译自: 环境污染与防治]     

昆钢滇中铁合金厂6000KVA电炉烟尘治理

昆钢滇中铁合金厂6000KVA电炉采用干法袋式除尘工艺处理烟气，通过改变滤袋材质、控制在线过滤风速、延长清灰静止沉降时间等措施，使整套装置除尘效率达到99．5％。     

水体腐殖酸及其络合物Ⅰ.蓟运河腐殖酸的提取和表征

提取和研究了华北蓟运河的腐殖酸,并从实验中得到了一些结论。国产吸附树脂GDX-102对分离河水中的腐殖酸比较有效,黄腐酸在树脂吸附前后的红外光谱没有明显的区别。氨—乙醇混合液作为解吸液效果较好,而且不引进金属离子。水体黄腐酸(FA)和棕腐酸(HA)的分子量低于煤炭和土壤中的FA和HA,其趋势为河水FA<河泥FA<河泥HA。水生腐殖酸具有明显的荧光特性,其酸性基高于土壤和煤炭腐殖酸,且—COOH基含量一般低于土壤和煤炭腐殖酸,—OH基是总酸性基的主要部分。水体腐殖酸的碳含量较低,氧、硫、氮含量较高,因此可能有各种取代基,这在络合作用中必须予以考虑。     

能见度的降低与大气污染的关系

根据重庆十年能见度及气象数据和大气监测数据,作出了不同风向上能见度玫瑰图和多元回归模型.结果显示,水平能见度距离的降低,主要是空气污染引起的.     

4-氯苯酚在水溶液中的光化学反应(Ⅱ)反应的动力学研究

研究了在模拟太阳光和紫外光作用下，４氯苯酚（４ＣＰ）的光反应动力学．研究表明，紫外光的作用更为显著．４ＣＰ的反应速率与４ＣＰ起始浓度、ｐＨ值，金属离子浓度、富里酸浓度等因素有关．通入空气，能够加速４ＣＰ降解．     

燃煤工业锅炉烟气脱硫技术

根据脱硫与除尘的关系，将燃煤工业锅炉烟气脱硫装置划分为三种类型，一是在同一时间，空间内进行脱硫与除尘的一体化装置，二是脱硫装置与除尘器分为两套独立的设备设计，安装，通常将引风机安装在两套设备之间，三是将一个塔体分为两部分，分别以脱硫，除尘为主，对这三种类型，作了举例说明，并讨论了其特点及适用对策。     

纳米TiO_2膜的制备及其光催化性能

采用溶胶 凝胶法(Sol Gel)制备了负载型纳米TiO2膜,分别考察了原料配比、pH值、煅烧温度对薄膜性质的影响,并利用XRD对其结构进行了表征,同时,用负载型TiO2膜对活性艳红X 3B(X 3B)模拟染料废水进行了微波辅助光催化脱色的研究。结果表明,改变原料配比及pH值可以制备出不同粒径的纳米TiO2膜,在450℃煅烧时TiO2呈锐态矿结构,在650℃以上出现锐态矿与金红石混晶结构,750℃时完全转变为金红石结构。所制得的纳米TiO2薄膜对X 3B具有较好的光催化活性。