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頁籤選單縮合
題名 | Adsorption Capacity of Heavy Metals in Taiwan Sediments=臺灣沉積物吸附重金屬能力之研究 |
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作者 | 洪楚璋; 陳續賢; |
期刊 | 臺灣海洋學刊 |
出版日期 | 19950100 |
卷期 | 34:1 1995.01[民84.01] |
頁次 | 頁29-40 |
分類號 | 351.983 |
語文 | eng |
關鍵詞 | 重金屬; 吸附能力; 臺灣沉積物; 相關係數; 海水之物理與化學特性; Heavy metals; Adsorption capacity; Taiwan sediments; Correlations; Physical and chemical properties of seawater; |
中文摘要 | 由於工業發展及都市擴展,導致臺灣地區沉積物如銅,鎘,鉛與鋅污染問題日趨 嚴重。當重金屬進入水域環境,必然會經由懸浮固體遷移至沉積物中。沉積物之重金屬吸附 能力受沉積物特性及海水之物理與化學性質之影響。本文目的在報導採自臺灣不同地區(包 括河川,湖泊及沿海)沉積物之特性,採自臺灣北部海域海水之物理與化學性質,沉積物吸 附重金屬之過程,及其沉漬物與海水之各種特性因子與吸附重金屬之相互關係。一般言之, 沉積物經EDTA處理,去除其重金屬背景含量後,每單位(μM/L)海水重金屬中吸附銅(介 於0.06-13.48μM/g),鎘(介於0.01-0.21μM/g),鉛(0.12-2.76μM/g)及鋅(0.12- 0.46μM/g)能力隨沉積物特性而異;例如在湖泊沉積物之重金屬吸附能力最強,河川次之 ,沿海最弱,可能是由於湖泊沉積物粘土(36.5%),TOC(12.3%),陽離子交換能力( 43.7meq/100g)及沉積物間隙水DOC(3.65mgC/L)偏高原因。 |
英文摘要 | Due to he heavy industrialization an urbanization, the contents of heavy metals such as copper, cadmium, lead and zinc in sediments have increased significantly. When heavy metals enter the natural waters the majorities are adsorbed on suspended matters, and then transferred to the sediments. The adsorption capacity of heavy metal in sediments is influenced by the characterization of sediments and the physical and chemical properties of sea water. The purposes of this paper are to study the characterization of sediments collected from the varous (as river lake and coast) locations, the physical and chemical properties of sea water collected off the northern Taiwan, the processes of heavy metal adsorption in sediments, and finally, the correlations between those parameters and the adsorption capacity of heavy metals in Taiwan sediments. For elimination of the background heavy metal contents, the sediments were treated with EDTA. The adsorption capactities of heavy metal in sediments for a unit μM/L of sea water ranged from 0.06-13.48 μM/g for Cu, 0.01-0.21μM/g for Cd, 0.12-2.76μM/g for Pb and 0.12-0.46μM/g for Zn. Higher capacities of heavy metal adsorption found in the lake sediments than those in the riverine and coastal sediments were due to the higher contents of clay (36.5%), TOC (12.3%), CEC (43.7 meq/100g) in the lake sediments and DOC (3.65mg C/L) in the interstitial water of sediments. The correlations between those parameters and adsorption capacities of heavy metal have been discussed. |
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