Alabdula'aly A I, Khan M A
King Abdulaziz City for Science and Technology, P.O. Box 6086, Riyadh-11442, Saudi Arabia.
Arch Environ Contam Toxicol. 2000 Jul;39(1):66-73. doi: 10.1007/s002440010081.
Twenty-three rain water samples were collected from 15 sampling locations in Riyadh during four rain events in 1994 and analyzed for pH, conductivity, TDS, alkalinity, Cl, NO(3), F, SO(4), Na, Mg, Ca, and 12 trace metals. The pH ranged between 6.83 and 8.21. The major cation and anion were Ca and SO(4), contributing with 30.5% and 20. 8%, respectively, to TDS. Moderate variation in major ions concentration was found to occur between different sites. The concentrations of different metals varied considerably from one sampling location to another. The dominant trace metal ions in the rain water samples were Zn, Pb, and Al. Samples collected from a site near a cement factory in Riyadh showed maximum concentrations of most of the major ions and metals. The concentrations of various ions in the first rain event were comparatively higher than the concentrations of these ions in the later rain events.
1994年，在利雅得的4次降雨期间，从15个采样点采集了23份雨水样本，分析了其pH值、电导率、总溶解固体（TDS）、碱度、氯离子（Cl）、硝酸根离子（NO₃）、氟离子（F）、硫酸根离子（SO₄）、钠离子（Na）、镁离子（Mg）、钙离子（Ca）以及12种痕量金属。pH值在6.83至8.21之间。主要阳离子和阴离子分别是钙离子（Ca）和硫酸根离子（SO₄），对总溶解固体（TDS）的贡献率分别为30.5%和20.8%。发现不同地点之间主要离子浓度存在适度变化。不同金属的浓度在不同采样点之间差异很大。雨水样本中主要的痕量金属离子是锌（Zn）、铅（Pb）和铝（Al）。从利雅得一家水泥厂附近的采样点采集的样本显示，大多数主要离子和金属的浓度最高。第一次降雨事件中各种离子的浓度相对高于后续降雨事件中这些离子的浓度。
