The cumulative characteristics of PAEs in PM2.5 in Changji,Northwest China     

Yuyan Liu  Caiye Ji  Bo Fu  Yongxin Yu  Haofeng Liu  Yaxing Shen 《自然地理学》2020,41(4):332-342

ABSTRACT

This paper discusses characteristics of the seasonal variation in phthalate acid esters (PAEs) in the PM_2.5 in the city of Changji, which is located an arid area of Xinjiang Province, northwest China. Samples were collected using a Laoying 2030 median discharge intelligent total suspended particulate (TSP) sampler and analyzed by a Shimadzu GC-2010 gas chromatograph. The results showed that PAEs in PM_2.5 were mainly composed of phthalic acid dibutyl phthalate (DBP) and phthalic acid (2-)ethyl hexyl ester (DEHP). DBP and DEHP are the most commonly used plasticizers, accounting for the majority of plasticizers used, and have large environmental emissions. Compared with the proportions of TSPs, proportions of DBP and DEHP in the PM_2.5 were lower, while the proportions of DMP and DEP were higher. A correlation exists between the distribution of PAEs and the particle size and concentration of atmospheric particulates. Seasonal variations in DBP and DEHP were the same, with lowest concentrations in the summer. Although seasonal variation in DMP was not the same as those of DBP and DEHP, the general trend was similar. Seasonal variation in DEP was different from those of other PAEs. This pattern is related to PAE characteristics and seasonal variations in their sources.  相似文献   

Preparation of Cationic Chitosan-Polyacrylamide Flocculant and Its Properties in Wastewater Treatment     

WANG Ben  ZHANG Yulian  MIAO Chunbao 《青岛海洋大学学报(英文版)》2011,(1):42-46

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广州地区蔬菜生产基地有机污染物含量状况及分布     

游远航 《吉林大学学报(地球科学版)》2015,(4):1205-1216

为了解广州地区蔬菜基地有机污染物的分布情况,选取了6个代表性基地进行调查采样,测试分析了表层土壤、蔬菜及灌溉水中15种邻苯二甲酸酯(PAEs)化合物、16种多环芳烃(PAHs)化合物和19种有机氯农药(OCPs)化合物的质量分数及质量浓度。结果表明:在15种PAEs化合物的总质量分数(w(ΣPAEs))中,土壤样品为158.0~4 321.0ng/g,蔬菜样品为1 134.0~48 576.0ng/g;水样中15种PAEs化合物的总质量浓度(ρ(ΣPAEs))为632.0~14 271.0ng/L;就单个化合物而言,以DiBP、DBP、DEHP三种污染物为主,其三项之和占所有PAEs质量分数的97.5%~99.1%;在16种PAHs化合物的总质量分数(w(ΣPAHs))中,土壤样品为28.48~1 121.96ng/g,蔬菜样品为238.09~1 000.61ng/g;水样中16种PAHs化合物的总质量浓度(ρ(ΣPAHs))为338.21~1 239.78ng/L;在19种OCPs化合物的总质量分数(w(ΣOCPs))中,土壤为0.04~71.28ng/g,蔬菜为1.08~9.18ng/g。总体上看,各基地土壤中DBP质量分数均超标,多环芳烃类在灵山、花东、黄埔菜地土壤中存在轻微污染,有机氯农药均未出现污染。  相似文献   

Dimethyl Phthalate Degradation by UV/H2O2: Combination of Experimental Methods and Quantum Chemical Calculation          下载免费PDF全文

Er‐Deng Du  Xin‐Xin Feng  Ying‐Qing Guo  Ming‐Guo Peng  Hong‐Qi Feng  Juan‐Lin Wang  Shuo Zhang 《洁净——土壤、空气、水》2015,43(6):811-821

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Chemometric Interpretation on the Occurrence of Endocrine Disruptors in Source Water from Malaysia     

Veerasingan Armugam Santhi  Hafizan Juahir  Ananthy Retnam  Ali Mohd Mustafa 《洁净——土壤、空气、水》2015,43(6):804-810

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Spatial and Temporal Distribution of Free and Conjugated Estrogens During Soil Column Transport     

《洁净——土壤、空气、水》2017,45(2)

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湿地植物种类和生长方式对根际酞酸酯及其单酯代谢物分布特征的影响   总被引：1，自引：0，他引：1  

迟杰  杨瑞  王爱丽 《湖泊科学》2012,24(3):416-421

选取天津大学校内两个相邻的小型湖泊(青年湖和爱晚湖)为研究对象,研究了湿地植物种类(芦苇和香蒲)和生长方式(单生和混生)对根际酞酸酯(PAEs)及其单酯代谢物(PAMs)分布特征的影响.结果显示:几乎所有的样品中都能检测到酞酸丁二酯(DBP)和酞酸二异辛酯(DEHP)及其单酯代谢物(MBP和MEHP),并且DBP和DEHP的浓度比相应的单酯代谢物高1～2个数量级;沉积物和根样品中DEHP的浓度高于DBP;芦苇和香蒲根对DEHP的富集系数(RCF)大于DBP.当芦苇和香蒲单生时(即青年湖),芦苇根际沉积物中DBP和DEHP浓度≤香蒲根际沉积物的浓度,并且芦苇根的RCF值也小于香蒲.当芦苇和香蒲混生时(即爱晚湖),芦苇根际沉积物中DBP和DEHP浓度<香蒲根际沉积物的浓度,而芦苇根的RCF值≥香蒲根的RCF值,与青年湖中不同.青年湖香蒲根际沉积物中DBP和DEHP的浓度小于爱晚湖,而香蒲根的RCF值与此刚好相反.芦苇根对这两种PAEs的富集没有这种关系,可能是由于这两个湖中芦苇的生长状况不同,与香蒲混生时,芦苇的生长受到抑制.对PAEs的单酯代谢产物分析发现,沉积物中MBP/DBP>MEHP/DEHP.MEHP在根中的浓度多数情况高于MBP,表明MEHP比MBP具有较强的根富集能力.同种植物单生时,根中PAM浓度均≥混生.  相似文献   

外源化学物质对鱼类生长和GH/IGF-I轴的影响     

郑艳  汝少国 《中国海洋大学学报(自然科学版)》2012,(Z1):102-106

生长激素/胰岛素样生长因子-I轴(Growth hormone/insulin-like growth factor-I axis,GH/IGF-I轴)是调控鱼类生长的主要内分泌轴线,许多外源化学物质能够影响鱼类的生长,并且能够干扰GH/IGF-I轴。本文介绍了鱼类GH/IGF-I轴的组成、功能及其对鱼类生长的调控模式,并从GH/IGF-I轴角度探究外源化学物质影响鱼类生长的内分泌作用机制,展望了该领域的发展方向。  相似文献   

The accuracy of methods used to estimate the whole-lake accumulation rate of organic carbon, major cations, phosphorus and heavy metals in sediment   总被引：1，自引：0，他引：1  

Brian Rippey  N. John Anderson  Ingemar Renberg  Tom Korsman 《Journal of Paleolimnology》2008,39(1):83-99

The accuracy of three methods used to estimate the whole-lake accumulation rate of chemicals in sediment, the simple mean accumulation rate, regression against water depth and the mean accumulation rate in sedimentation zones, was assessed. The concentrations and accumulation rates of organic carbon, four major cations, phosphorus and four heavy metals in the 1902 to 1988 sediment layer at 43 sites in Kassjön were used and the three methods gave identical results. The accuracy of the simple mean accumulation rate method using 5 or 10 sites was investigated using Monte Carlo simulation and both versions gave accurate results. If the method used the dry sediment accumulation rate at 5 or 10 sites, along with chemical concentration at one central site, then the errors were less than ±10% for five of the chemicals and larger for the others (?20 or 20–40%), although the direction of the bias was predictable. If chemical accumulation rate at the central site only was used to estimate the whole-lake value, the bias increased to 25% for the major cations, 50% for the heavy metals and P, and 85% for organic carbon. Having 43 sites in Kassjön meant that the true whole-lake chemical accumulation rate was known and so the accuracy of the methods and their variants could be assessed for the first time. These findings allow the particulars of the simple mean accumulation rate method to be chosen to suit the accuracy needed for a palaeolimnological investigation.  相似文献   

南平市公路运输危险化学品污染事件的研究     

边归国 《福建地理》2009,(2):79-84

对2004-2007年在福建省南平市行政区域内发生的公路运输危险品污染事件进行统计分析，研究结果表明：南平市4年间共发生26起公路运输危险化学品事故，每年平均6．5起．其中夜间发生事故的比率为57．7％，夏季发生事故的比率为34．6％，35～45岁驾驶员年龄段事故发生率高达59．1％，驾龄在11～15年的为事故多发驾龄段，其发生率为45．5％，发生在弯道的事故占61．5％，超载发生事故的可能性为44．0％，占总数65．4％的事故对环境产生污染．205国道南平段发生危险化学品运输事故的概率为0．0124次／（a·km），发生危险化学品泄漏事件的可能性为0．0142次／（a·km），发生危险化学品1t以上大规模连续泄漏事件的概率为0．0098次／（a·km）．  相似文献