Dust fallout in Kuwait city: Deposition and characterization
Dust fallout in Kuwait city: Deposition and characterization
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DOI：
10.1016/j.scitotenv.2013.03.052
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发表时间：
2013-09-01
影响因子：
9.8
通讯作者：
AlShuaibi, Arafat A.
中科院分区：
文献类型：
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作者：
Al-Awadhi, Jasem M.;AlShuaibi, Arafat A.
2011年3月至2012年2月期间，每月在10个地点监测科威特城的降尘情况。研究结果表明：（1）月降尘率为0.002 ~ 032 kg/m2，平均为0.053kg/m2，年平均为0.59kg/m2，在世界56个降尘率中居首位;（2）平均约有55.9%的沉降尘含有细至极细的沙粒，而粉砂和粘土则分别占总样本的37.4%和1.4%;（3）在15种元素中，Zn和Mo的含量比科威特土壤背景值高11倍，Pb和Ni的含量比科威特土壤背景值高7倍;（4）Mo、Ni、Pb和Zn相对于上陆壳组分（Mn）的富集程度最高;（5）Sr、Zr和Zn在所有样品中的结核含量最高;（6）石英和方解石是粉尘样品中的主要矿物。灰尘中重金属的分布似乎主要受土地利用和交通排放量的控制。(C)2013爱思唯尔有限公司版权所有。
Dust fallouts in Kuwait city was monitored on monthly basis during the period from March 2011 to February 2012 at 10 locations. The results of this study reveal that: (1) monthly dust deposition rates ranged from 0.002 to 032 kg/m(2) with average deposition rate of 0.053 kg/m(2) and annual average deposition rate of 0.59 kg/m(2), ranking the first out of 56 dust deposition rates observed throughout the world; (2) on average, about 55.9% of the settled dust have fine to very fine sand fraction sizes, while silt and clay comprise an average of 37.4 and 1.4% of the total sample, respectively; (3) the concentrations for Zn and Mo out of 15 other elements analyzed from the dust were up to 11 times higher than their soil background values in Kuwait, while Pb and Ni were about seven times higher; (4) Mo, Ni, Pb and Zn show maximum enrichment relative to the upper continental crustal component (Mn); (5) Sr, Zr and Zn show highest concretions among all collected samples; and (6) quartz and calcite were the dominant minerals in the dust samples. The distribution of the heavy metals in dust seems to be controlled mainly by the land uses and the volume of traffic emissions. (C) 2013 Elsevier B.V. All rights reserved.