Aquatic photolysis of hydroxylated polybromodiphenyl ethers under direct UV irradiation: a case study of 2′-HO-BDE-68

Environmental Science and Pollution Research - Hydroxylated polyhalodiphenyl ethers (HO-PXDEs) have attracted considerable scientific interest as examples of emerging aquatic pollutants. However, a...     

GPRS在环境空气质量自动监测中的应用

针对目前采用电话拨号方式进行数据通信的空气质量自动监测系统所存在的实时性差等问题,通过分析比较目前环境监控系统常用的几种通信方式的优缺点,提出了一种基于GPRS技术的空气质量监测数据通信系统,此系统主要由监测子站、传输网络和监控中心等部分组成,采用GPRS无线网络和Internet网络为通道来实现监测数据的远程传输和状态监控,以达到实时监控的目的。采用GPRS进行数据通信具有经济适用、永远在线、实时性好等优点。     

聚乙烯醇生物降解菌群的结构分析及优势菌株降解特性

对堆肥中降解聚乙烯醇材料的微生物菌群结构进行了分析。结果表明:降解聚乙烯醇材料的优势菌群属于芽胞杆菌科(Bacillaceae)。从降解了3年的材料表面筛选出了1株聚乙烯醇降解菌DG01,鉴定为苏云金杆菌(Bacillus thuringiensis sp.)。分别以聚乙烯醇(poly(vinyl alcohol), PVA)浓度和二氧化碳排放量为指标,对PVA的降解动力学进行了研究。结果表明:PVA生物降解过程符合一级动力学模型,R2分别为0.984 0和0.983 5。对摇瓶培养条件进行了单因素优化实验。最佳降解温度,初始pH和酵母粉浓度分别为41℃、7和1.40 g·L~(-1)。优化后,48 h内PVA初始浓度为3 g·L~(-1)的降解率达到了45.21%,提高了2.10倍。     

Enhanced degradation of reactive brilliant red X-3B by photocatalysis integrated with micro-electrolysis

Environmental Science and Pollution Research - The microwave electrodeless lamp UV photocatalysis (MWUV) integrated with iron carbon micro-electrolysis (ME) was applied to degrade reactive...     

The effects of air exposure on the desiccation rate and photosynthetic activity of Thalassia hemprichii and Enhalus acoroides

The effects of air exposure on the desiccation rate and photosynthetic activity of Thalassia hemprichii and Enhalus acoroides were studied using chlorophyll fluorescence. The desiccation rate of T. hemprichii was higher than that of E. acoroides, while the critical threshold of relative water content (RWC_critical) showed opposite trend. Neither the desiccation rate nor RWC_critical of T. hemprichii was significantly affected by temperature, while the desiccation rate of E. acoroides was affected significantly. For both species, the effective photochemical efficiency of PSII decreased gradually above the RWC_critical, while declined rapidly below the RWC_critical. After initial air exposure, the relative maximum electron transport rate of both seagrasses increased gradually to a maximum and then decreased to initial value near the RWC_critical. Therefore, short-term air exposure above the RWC_critical is beneficial for both seagrasses, and the RWC_critical should be considered when examining the response of seagrass photosynthesis to air exposure and selecting transplantation sites.