Alkyl polyglycosides enhanced the dark fermentation of excess sludge and plant waste to produce hydrogen: performance and mechanism

Environmental Science and Pollution Research - Alkyl polyglycosides (APG), a biodegradable biosurfactant, have been widely used in environmental pollution control. However, the application of APG...     

An insight into the drag effect of water,land, and energy on economic growth across space and time: the application of improved Solow growth model

Environmental Science and Pollution Research - Economies that depend on natural resources can experience a resource drag effect when economic growth is limited by constraints on the availability of...     

Exploring the spatial pattern of renewable energy technology innovation: evidence from China

Environmental Science and Pollution Research - Considering the obvious regional differences in China, research on the drivers for renewable energy technology innovation (RETI) needs to fully...     

Impact of air pollutants on hospital visits for pediatric asthma in Fuzhou city,southeast China

Environmental Science and Pollution Research - Rapid social development in China has resulted in severe air pollution and adverse impacts on people’s health. Although studies have been...     

Novel visible-light-driven SrCoO3/Ag3PO4 heterojunction with enhanced photocatalytic performance for tetracycline degradation

Environmental Science and Pollution Research - The semiconductor photocatalytic technology has been considerably studied due to its excellent catalytic performance in water pollution control....     

How does turions production of Potamogeton crispus L. respond to parental population biomass and living environment

Environmental Science and Pollution Research - Turions production is the dominant means of propagation in Potamogeton crispus L. To understand how parental population and their living environmental...     

漳河上游流域沉积物中磷的空间分布特征及其影响因素

漳河上游地区众多的水利工程改变了流域水循环,同时也影响了河流泥沙和生源物质的循环过程。为揭示人类活动干扰下的沉积物中磷的赋存特征,采用改进后的连续化学萃取法分析了漳河上游沉积物中总磷(TP)和磷形态的空间分布特征及其影响因素。研究结果表明,漳河上游沉积物中的TP含量为405.94~899.98 mg/kg,低于我国其他主要河流,接近我国东部平原湖泊含量水平。漳河上游的TP富集指数(PEI)均值为1.15,表明漳河上游富营养化风险较高。可交换态磷(Ex-P)、铁锰螯合态磷(BD-P)、铁铝氧化态磷(NaOH-P)、钙结合态磷(HCl-P)分别占沉积物中TP含量的1.13%、33.96%、12.99%、35.05%。BD-P和HCl-P是沉积物中主要的磷形态,Ex-P的含量最低,NaOH-P的含量波动最大。漳河上游沉积物中,生物可利用磷(BAP)的含量约占TP含量的38.36%~52.04%,其中,清漳干流的BAP含量明显低于其他河段。清漳源头的水土流失及浊漳河的磷输入对漳河上游BAP含量的贡献较大。统计分析显示,漳河上游表层沉积物中,TP和磷形态的空间分布无显著差异,表明以水利工程建设为代表的强烈人类活动对漳河上游沉积物中磷的空间分布的影响不显著。相关性分析和冗余分析表明,沉积物中的NaOH-P含量与沉积物中黏土和粉土的占比有较高的相关性,BD-P和NaOH-P是控制沉积物中BAP构成的重要因素,Fe含量是沉积物中TP含量的主控因子。     

微电网中典型分布式电源建模及控制策略研究

为了实现对微电网的电压与功率的控制,针对微电源类型的差异性,通过对光伏及燃料电池等分布式电源建立数学模型并进行仿真分析,研究其对微电网的影响。提出了基于电压外环、电流内环和功率环等反馈控制器和改进的下垂控制方法的微电网分布式电源分层控制策略。利用 Matlab/simulink 仿真系统,通过在并网和孤岛两种模式中微电网的运行特性及各分布式电源在不同工作环境下微电网的功率、频率和电压曲线的变化规律的分析,验证了分层控制策略的有效性。结果表明:分层控制策略能够使各分布式电源之间较好地协调,满足微电网对其运行稳定性和电能质量的要求。