Effects of Cu（Ⅱ） and humic acid on atrazine photodegradation

This work was designed to explore the characteristics of photodegradation of herbicides in the copper-polluted water body. The results showed that Cu(II) alone could induce a photo Fenton-like reaction to enhance the degradation of atrazine, in which hydroxyl radical ( OH) was a main active species. Humic acids restrained atrazine degradation, nevertheless, when introducing Cu(II), the photodegradation was accelerated, in which singlet oxygen (1O2) replaced OH acting as the prevailing species. A feasible mechanism for the photochemical process was also proposed, which is helpful for better understanding the environmental photochemistry of atrazine in the copper-polluted water.     

基于服务式GIS的流域水质目标管理技术平台架构设计

针对流域水质目标管理与GIS集成技术,对比分析传统模式与服务式GIS模式的优劣,提出了基于服务式GIS的流域水质目标管理技术平台的层次结构、总体架构及建设步骤;基于具体建设需求分析,构建了辽河流域水质目标管理技术平台的详细架构。     

改性海泡石除磷剂除磷过程热力学的研究

通过研究改性海泡石对磷的吸附性能,确定了除磷剂用量、温度、含磷废水流量、添加剂等因素对改性海泡石磷吸附热力学平衡的影响.研究结果表明:改性海泡石除磷剂对废水中PO43-离子的吸附容量随除磷剂质量的增加而减小;去除率随除磷剂用量的增加而增大;提高酸改性温度有利于复合除磷剂对磷的吸附;除磷剂的吸附量随海泡石焙烧温度的提高而...     

榆神矿区矿井水零排放可行性分析

针对榆神矿区给排水现状,分析矿区给排水关系和矿井水的利用途径,并提出矿井水零排放的技术、管理对策,达到减少新水索取,实现零排放.     

Debromination of decabromodiphenyl ether by organo-montmorillonite-supported nanoscale zero-valent iron：Preparation, characterization and influence factors

An organo-montmorillonite-supported nanoscale zero-valent iron material(M-NZVI) was synthesized to degrade decabromodiphenyl ether(BDE-209). The results showed that nanoscale zero-valent iron had good dispersion on organo-montmorillonite and was present as a core-shell structure with a particle size range of nanoscale iron between 30–90 nm, characterized by XRD, SEM, TEM, XRF, ICP-AES, and XPS. The results of the degradation of BDE-209 by M-NZVI showed that the efficiency of M-NZVI in removing BDE-209 was much higher than that of NZVI. The efficiency of M-NZVI in removing BDE-209 decreased as the pH and the initial dissolved oxygen content of the reaction solution increased, but increased as the proportion of water in the reaction solution increased.     

一株耐低温石油降解菌的鉴定及降解特性

在低温条件下(15℃),从抚顺石油二厂曝气池活性污泥中驯化和分离得到一株以柴油为碳源的降解菌株Q21,通过菌体形态、生理生化反应特性和16S rDNA基因测序分析对其进行鉴定.菌株Q21为琼式不动杆菌(Acinetobacter junii),该菌株利用柴油生长的最佳条件为:接种量为10%,生长温度为15℃,pH值为7.0,摇床转速为150 r·min-1,盐度为0.5%~1.0%,降解率为71.50%;降解后的残油组分经GC-MS分析结果表明,菌株Q21能降解柴油中所含的C9~C24之间大部分烷烃.     

畜禽养殖业氨氮总量控制减排技术评估研究

畜禽养殖业是"十二五"期间氨氮总量减排的重点,其清洁生产与末端治理技术种类繁多,不同技术在不同应用条件下减排效果差别显著。深入分析了国内外畜禽养殖业发展与污染现状,系统归纳了国内畜禽养殖业氨氮总量减排技术区域特征,综合使用层次-灰色综合评判法、费用-效益法、表单法等对氨氮总量减排技术进行了综合性的评价研究,构建了基于面向服务架构(SOA)的氨氮减排技术评估咨询平台。结果表明,氨氮总量减排技术评估方法与平台可大幅度提高技术评价的效率和精确度,可广泛应用于企业和管理部门氨氮减排的工程技术与环境管理工作。     

Photoelectrocatalytic degradation of pentachlorophenol in aqueous solution using a TiO2 nanotube film electrode

Titanium dioxide (TiO2) nanotube film electrodes are fabricated by the anodic oxidation method. Scanning electron microscopy (SEM) showed that these tubes were well aligned and organized into high-density uniform arrays. XRD analysis showed the TiO2 nanotubes to be in the anatase crystal form. The TiO2 nanotube film electrode exhibited increased photoelectrocatalytic (PEC) capability compared to a traditional TiO2 film electrode fabricated using the anodizing method for pentachlorophenol (PCP) degradation in aqueous solution. The bias potential, pH value, and electrolyte concentration were shown to be important factors influencing the degradation of PCP by the PEC method using the TiO2 nanotube film electrode as the working electrode.     

Distribution Characteristics and Implication of n-alkanes in Soils and Plants in Alpine Meadow

Russian Journal of Ecology - The present study was conducted to investigate the n-alkane composition of typical alpine meadows. Plant and soil samples were collected and analyzed to characterize...     

皂素和柠檬酸复合淋洗土壤中的钍

采用振荡淋洗和土柱动态淋洗实验研究了皂素和柠檬酸复合对土壤中钍的淋洗性能。实验结果表明:将质量浓度为20 g/L的皂素与浓度为20 mmol/L的柠檬酸以体积比1∶10配制复合淋洗液对污染土壤中钍的去除效果最佳,淋洗3.0 h,钍去除率为84.98%;准一级动力学方程能更好地描述复合淋洗液对钍的淋洗动力学特征;动态淋洗实验中当复合淋洗液用量为1 600 mL时,钍的累积去除量为73.66 mg/kg;淋洗后土壤中钍的酸可提取态、氧化结合态和有机结合态含量分别减少了79.63%、38.13%和20.34%,残渣态含量变化不大;淋洗后土壤中钍的稳定性增加。