- 污泥堆肥化對重金屬生物可利用性的影響
- Effects of Sludge Composting on Bioavailability of Heavy Metals
- 孫穎 桂長華
- 土木與環(huán)境工程學(xué)報(bào)（中英文） 2007年29卷第3期 頁碼：110-114
- DOI：10.11835/j.issn.1674-4764.2007.03.027
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紙質(zhì)出版日期：2007
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摘要
通過重金屬形態(tài)分析及在模擬雨水、酸雨淋溶條件下重金屬遷移實(shí)驗(yàn)和理論分析，研究了堆肥化處理對污泥中重金屬生物可利用性的影響。結(jié)果表明：堆肥化處理使重金屬的不穩(wěn)定形態(tài)含量降低，原污泥在酸雨淋溶下重金屬已經(jīng)遷移到約16厘米深的土柱中，而經(jīng)過處理后的污泥淋出液中的重金屬含量很低，僅有少量污泥中含量較高的元素向土柱深層遷移。遷移量及深度明顯低于未處理的原污泥。實(shí)驗(yàn)及理論分析均證明了堆肥化處理可以降低污泥中重金屬在土壤中的遷移性，使重金屬的生物可利用性降低。
Abstract
With form analysis of heavy metals, the transportation experiment and theoretical analysis of heavy metals by simulated rain and acid rain showering were carried out, the effects of sludge composting on Bioavailability of heavy metals in sludge were studied. The results indicated that the ratio of the unsteady species of heavy metals in sludge is reduced after composting. The heavy metal elements in leachate of original sludge treated with acid rain had moved down to the layer of soil with the depth of 16 cm,while the content of heavy metal of treated one is lower and only a small quantity of elements had moved down to the deep layer of the soil. Both the volume and the depth of the composted sludge are lower apparently than those before composting. The experiment and theoretical analysis verified that both the transportation of heavy metals in soil and the bioactivity of heavy metals are reduced by sludge composting.
