内蒙古近地面臭氧污染时空分布特征及气象条件分析

使用2018—2020年内蒙古臭氧(O₃)、气象要素观测资料和NCEP FNL资料,统计分析内蒙古近地面O₃质量浓度的时空分布特征和变化趋势,并针对全区O₃污染典型个例分析其天气形势和气象要素的影响作用。结果表明:内蒙古2018—2020年O₃质量浓度年评价值呈逐年下降趋势,2020年较2018年下降10.3%,各盟市O₃超标率也显著降低,仅赤峰市和通辽市略微上升。内蒙古O₃质量浓度高值分布在中西部偏南地区,尤其是乌海市和鄂尔多斯市;O₃超标率峰值主要出现在5—7月,周末效应存在东西部差异。O₃浓度变化和天气形势关系密切,南部暖平流和暖高压控制有利于O₃生成,西北部冷平流和冷涡发展使得O₃浓度下降;高温、低湿、微风和较高的能见度均为诱发O₃污染的重要气象条件,而西北大风通过降低温度、能见度和易于扩散的风向使得内蒙古O₃浓度降低,但同时可能会导致PM₁₀污染。     

基于稳定碳同位素的济南市二元羧酸类SOA的污染特征与形成机制

为研究济南市冬季PM2.5中二元羧酸类二次有机气溶胶(SOA)的来源、液相形成机制及影响因素,于2016年1-2月昼夜共采集46个PM2.5样品,并对二元羧酸类SOA(包括二元羧酸、酮羧酸与α-二羰基化合物)与左旋葡聚糖的昼夜变化特征进行分析.研究结果表明,二元羧酸、α-二羰基化合物与左旋葡聚糖均呈昼低夜高的变化特征,...     

A nationwide survey of 20 legacy brominated flame retardants in indoor dust from China: continuing occurrence,national distribution,and implication for human exposure

Environmental Science and Pollution Research - Despite the restrictions on polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecanes (HBCDDs), these chemicals are still ubiquitous...     

Municipal waste treatment efficiency in 29 OECD countries using three-stage Bootstrap-DEA model

Environment, Development and Sustainability - Rapid urbanization has led to a sharp increase in municipal waste generation, which has resulted in significant environmental problems. However, the...     

Study on green output bias of China’s mariculture technological progress

Environmental Science and Pollution Research - With the rapid development of mariculture, environmental pollution is becoming more and more serious. It is particularly important to study the green...     

Exogenous fulvic acid enhances stability of mineral-associated soil organic matter better than manure

Environmental Science and Pollution Research - Mineral-associated soil organic matter (MAOM) is seen as the key to soil carbon sequestration, but its stability often varies with types of exogenous...     

厌氧氨氧化细菌富集培养过程微生物结构与功能解析

为了研究厌氧氨氧化细菌富集培养过程中微生物结构与功能的关系,本研究采集升流式污泥床反应器(Upflow anaerobic sludge bed,UASB)中厌氧氨氧化反应启动与驯化过程的样品,结合传统微生物培养方法和分子生物学手段,对启动过程中的氮素转化功能基因、异养菌演替及菌群演替进行了定性与定量分析.结果表明,随...