A bibliometric analysis of anaerobic digestion for methane research during the period 1994–2011

This study uses a bibliometric approach in identifying global research trends related to the anaerobic digestion of biomass for methane production using related literature in the Science Citation Index Expanded database, retrieved from the ISI Web of Science. The data used covers the period 1994–2011. The articles acquired from such literature were concentrated on the general analysis by scientific output, the research performances by countries, institutes, and collaborations, and the research trends by the frequency of author keywords, words in title, words in abstract, and ‘KeyWords plus’. The research outputs of anaerobic digestion for methane had notably increased in the field of environmental sciences, biotechnology and applied microbiology, environmental engineering, energy and fuels, and microbiology, while increased slightly in water resources. The USA with most publications and China with the highest growth rate were compared. Finally, author keywords, words in title and ‘KeyWords plus’ were analyzed contrastively, with the recent hotspots provided.     

我国发展循环经济的必要性及实证分析

阐述了循环经济的概念、发展过程、现实意义。指出循环经济是针对持续的经济增长对资源和环境压力而提出的一种新的经济发展模式，也是一种新的技术经济范式。论述了经济发展阶段与循环经济、效率与循环经济．生态经济与循环经济的关系。以上海市吴泾化工区循环经济的实践为例，进行了实证分析。     

Effect of Changing VOC Influent Composition on the Microbial Community Structure of TBABs

Microbial communities in trickle bed air biofilters (TBABs) were evaluated under conditions of interchanging the feed volatile organic compounds (VOCs) and VOC mixtures. Three independent TBABs (Biofilter “A,” “B,” and “C”) were run under interchanging VOCs conditions with different initial VOCs. Two aromatic compounds (toluene and styrene) and two oxygenated compounds (methyl ethyl ketone (MEK) and methyl isobutyl ketone (MIBK)) were interchanged as single solutes. Two other TBABs “D” and “E” were run for two VOC mixtures. Biofilter “D” had a VOC mixture with equal molar ratio of the four components and Biofilter “E” received a VOC mixture with its composition based on EPA 2003 emission report. Denaturing gradient gel electrophoresis (DGGE) analysis of 16S rRNA genes was used to assess the microbial richness in TBABs for treating the VOC mixtures and the impact of interchanging VOCs on the bacterial community structure in the biofilters. The results from DGGE indicated that the microbial community structure in the biofilter was different after each interchange of VOCs. Some bands of microbial species faded and some bands were strengthened. For the two TBABs treating VOC mixtures, the microbial species did not show significant difference, but the richness among these species was different from each other.     

AERMOD与EIAA大气预测模型在环境影响评价中的应用比较

大气环境影响预测是环境影响评价的一项重要内容,为准确评价项目实施后对周围大气环境的影响,需采用合适的大气预测模型.从大气预测模型系统组成原理、应用范围、应用过程、预测结果等方面对AERMOD和EIAA大气预测模型进行比较,分析两种模型在大气环境影响预测中的优缺点.     

三相流化床电Fenton法预处理硝基苯废水试验研究

采用铁碳微电解固定床、铁碳微电解流化床、电絮凝、电氧化等不同的组合方法,处理难降解的硝基苯类废水,找出最佳的组合工艺,即三相流化床组合电絮凝,配合后续间接电芬顿,能将难降解废水COD435ppm处理到COD小于90ppm,色度小于2倍,很有推广价值。     

建三江分局稻壳污染防治现状及综合利用初探

本文论述了建三江分局稻壳综合利用的现状,分析了产生稻壳污染的原因,提出了下一步稻壳污染防治的对策.     

环嗪酮对生态环境影响评价研究

在实验室测定了环嗪酮有不同ｐＨ条件下的水解、不同土壤中的降解及其在直径为２ｃｍ长为３０ｃｍ的玻璃管中的淋溶移动情况，试验结果表明，环嗪酮在ｐＨ为５、７、９三种不同缓冲溶液中的水解半衰期分别为５１７９．３、２４１３．９、８６６．４天；在东北黑土、江苏黄棕壤、浙江黄壤与江西红壤四种不同土壤中的降解半衰期分别为４０．３、９．６、７７．１和１２０．３天；在上述四种土壤中的移动速率次序为东北黑土＜江苏黄棕＜浙江黄壤＜江西红壤。田间试验结果表明，环嗪酮在试验区土壤中的淋溶性能极高，施药后半月内即可淋溶到６０～１２０ｃｍ深的土层中，淋溶到６０ｃｍ以下土层中的量占环嗪酮总使用量的１４．７％，在试验区内外的观测井中也检测到它的残留。但其在土壤的消失速率也很快，施药２个月后，在试验区各土层与观测井中均已无残留检出，在试验区环境条件下，它的使用将不会导致对地下水的污染。