Effects of chloride, sulfate and natural organic matter (NOM) on the accumulation and release of trace-level inorganic contaminants from corroding iron
學年 102
學期 1
出版（發表）日期 2013-09-01
作品名稱 Effects of chloride, sulfate and natural organic matter (NOM) on the accumulation and release of trace-level inorganic contaminants from corroding iron
作品名稱（其他語言）
著者 Peng, C. Y.; J. F. Ferguson; G. V. Korshin
單位 淡江大學水資源及環境工程學系
出版者 London: I W A Publishing
著錄名稱、卷期、頁數 Water Research 47(14), pp.5257-5267
摘要 This study examined effects of varying levels of anions (chloride and sulfate) and natural organic matter (NOM) on iron release from and accumulation of inorganic contaminants in corrosion scales formed on iron coupons exposed to drinking water. Changes of concentrations of sulfate and chloride were observed to affect iron release and, in lesser extent, the retention of representative inorganic contaminants (vanadium, chromium, nickel, copper, zinc, arsenic, cadmium, lead and uranium); but, effects of NOM were more pronounced. DOC concentration of 1 mg/L caused iron release to increase, with average soluble and total iron concentrations being four and two times, respectively, higher than those in the absence of NOM. In the presence of NOM, the retention of inorganic contaminants by corrosion scales was reduced. This was especially prominent for lead, vanadium, chromium and copper whose retention by the scales decreased from >80% in the absence of NOM to <30% in its presence. Some of the contaminants, notably copper, chromium, zinc and nickel retained on the surface of iron coupons in the presence of DOC largely retained their mobility and were released readily when ambient water chemistry changed. Vanadium, arsenic, cadmium, lead and uranium retained by the scales were largely unsusceptible to changes of NOM and chloride levels. Modeling indicated that the observed effects were associated with the formation of metal–NOM complexes and effects of NOM on the sorption of the inorganic contaminants on solid phases that are typical for iron corrosion in drinking water.
關鍵字 Chloride;Sulfate;Natural organic matter;Corrosion;Iron;Heavy metal;Contaminants;Accumulation;Release
語言 en
ISSN 0043-1354
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Peng, C. Y.
審稿制度 否
國別 GBR
公開徵稿
出版型式 ,紙本
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