Bioaccumulation and physiological effects of excess lead in a roadside pioneer species Sonchus oleraceus L

Seedlings of Sonchus oleraceus L. were transplanted to soil supplied with lead acetate at dosages of 0, 800, 1600 and 3200 mg kg(-1) DW. Measures of chlorophyll content, peroxidase (POD) activity, shoot length, biomass and Pb content in the plant tissues were obtained from the experimental plants. With increasing amounts of Pb in the soil, the chlorophyll content, shoot length and biomass decreased, while POD activity and Pb content in the plant tissues increased. At 3200 mg kg(-1) Pb treatment, Pb content in the plant leaf, stem and root were 65.67, 149.82 and 1113.24 mg kg(-1), respectively. Only at 3200 mg kg(-1) Pb treatment did chlorophyll content, shoot length and biomass significantly increase by 18, 15 and 44%, respectively, while POD decreased by 39% over the control. The potential of applying this species in phytoremediation of Pb contaminated roadside soils and thus restoration of the roadside vegetation are discussed.     

湿式氧化技术及其应用比较

对湿式氧化技术及其影响因素进行了介绍 ,叙述了各种因素的影响作用并对各因素的影响强弱进行了比较 ,认为反应温度和处理对象的性质是影响湿式氧化技术处理效果的关键因素。阐述了湿式氧化技术在废水处理、污泥处理、活性炭再生中的一些应用研究情况 ,并进行了比较。总结了湿式氧化技术的特点及其在环境治理中的优势     

Prevalence and Bayesian Phylogenetics of Enteroviruses Derived From Environmental Surveillance Around Polio Vaccine Switch Period in Shandong Province,China

Food and Environmental Virology - We present the results of environmental surveillance for poliovirus (PV) and non-poliovirus (NPEV) around the switch from trivalent to bivalent oral polio-vaccine...     

巴氏醋酸杆菌发酵处理甲醇废水合成细菌纤维素的研究

介绍了巴氏醋酸杆菌以甲醇为唯一碳源、以酵母膏或蛋白胨为氮源合成细菌纤维素,同时净化甲醇废水的方法,并对合成细菌纤维素的培养条件进行了研究。试验得出巴氏醋酸杆菌的适宜发酵条件为：发酵培养基中甲醇质量分数为3．5％左右,发酵培养基初始pH为5．0～6．0。接种量为5％,发酵培养温度为30℃,振荡器转速为100r／min。     

Variations in the coral community at the high-latitude Bailong Peninsula,northern South China Sea

Environmental Science and Pollution Research - High-latitude coral communities have attracted much attention due to their potential as refuges during global climate change. However, this function...     

乡村绿色住区示范区污水就地处置回用--黄土高原干旱半干旱乡村绿色住区水资源开发利用研究

探讨了乡村绿色住区污水就地处置技术的可行性,结合西北黄土高原乡村绿色住区示范区建设,设计了黄土高原干旱半干旱乡村聚居区污水就地处置回用的工艺型式.     

污染土壤的植物修复技术进展

植物修复技术是通过使用绿色植物修复污染土壤。它主要源于一系列农艺学，生物学和工程学技术，利用影响植物的生物、微生物及植物的化学和物理作用复污染场地，标签昨技术在经济，美学和技术方面比传统的工程修复技术有更大的优点，概述了植物修复领域的研究动向，以便为修复工作者提供背影资料和研究方法。     

兴山县三峡库区地质灾害防治工程管理成效分析

湖北省兴山县顺利完成了17处崩滑体、3处长2 939.07 m库岸防护的二期地质灾害的防治工作,为135 m、139 m水库蓄水创造了条件.在兴山县二期地质灾害防治中,紧紧围绕＂挡（抗滑支挡）、排（表里排水）、削（削坡减荷）、护（防冲护坡）和绕（防御绕避）＂的五字方针,在一套行之有效的管理体制下,治理项目达到了设计要求,取得了预期的效果.     

次氯酸钠氧化脱除黄磷尾气中的硫、磷杂质

采用次氯酸钠氧化工艺净化黄磷尾气，在次氯酸钠溶液中有效氯的质量分数为0．65％，PH为9、反应温度为285K，气体流速为0．6-0.8L/min的条件下，对尾气中H2S、PH3的脱除率分别达到99．9％，和99．8％，出口含量分别小于0.2mg/m^3和7mg/m^3，对有机硫也有30％的脱除能力。