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題 名 | 以酒廠污泥製備可溶性有機質溶液復育鉛污染之土壤=Remediation of Lead-Contaminated Soil Using Dissolved Organic Matter Solution Prepared by Wine-Processing Waste Sludge |
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作 者 | 劉鎮宗; 林文修; 林文經; | 書刊名 | 宜蘭大學工程學刊 |
卷 期 | 9 2013.12[民102.12] |
頁 次 | 頁38-49 |
分類號 | 445.6 |
關鍵詞 | 鉛; 可溶性有機質; 重金屬; 污泥; 土壤清洗法; Lead; Dissolved organic carbon; Heavy metal; Sludge; Soil washing; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究使用花蓮酒廠污泥備製可溶性有機質(Dissolved organic matter, DOM)溶液,清洗鉛污染農地土壤(表土5340及裡土4920 mg Pb kg^(-1))進行復育。DOM(1500 mg L^(-1))對鉛的移除率在各pH條件下均高於水溶液者,表土以pH 2.0之DOM清洗兩次可將土壤鉛濃度降至723 mg kg^(-1),裡土僅以pH 3.0 DOM清洗一次即可將其鉛濃度降至1790 mg kg^(-1),此成果已能符合土壤管制標準2000 mg Pb kg^(-1)。在土壤地力方面,表土經pH 2.0 DOM、裡土經pH 3.0 DOM清洗二次後,其有機質、銨態氮、有效性磷、交換性鉀及交換性鈉之含量皆較原始土樣明顯增加;唯交換性鈣、鎂於表土減少為原來的26%與24%,於裡土則減少為原來50%與46%;清洗後表土之pH僅有3.3,裡土則仍有4.4。相較於水溶液之酸洗,以DOM清洗法復育重金屬污染土壤,可防止大多的肥力流失,降低地力回復成本。 |
英文摘要 | The wine-processing waste sludge was employed to preparing a dissolved organic matter (DOM) solution for remediating a Pb-contaminated cropland by soil washing. The Pb concentrations were to be 5340 and 4920 ppm in topsoil and subsoil, respectively. The aims of this study were to determine the effects of pH and washing frequency on the Pb removal as well as the variations in soil fertility before and after treatment. The DOM washing has more Pb removal in comparison with the aqueous washing at whole pH levels. The Pb concentration in the topsoil was declined to be 723 ppm by washing with 1500 mg L^(-1) of DOM solution two times at pH 2.0, however the Pb concentration in the subsoil could be decreased to be 1790 ppm by only one wash employing the same DOM solution at pH 3.0; the results; the final Pb concentrations were met the control standard 2000 ppm. Summarizing the changes in soil fertility during the DOM washings, most of the fertility indices, including contents of organic matter, N-NH_3, available phosphorus, exchangeable K and Na, were increased significantly. However, pH in topsoil and subsoil became to be only 3.3 and 4.4; exchangeable Ca and Mg in topsoil were respectively reduced to 26% and 24% of original contents as well as 50% and 46% of the original contents. This indicated soil recovered by DOC solution could improve its fertility. |
本系統中英文摘要資訊取自各篇刊載內容。