污泥施用对土壤腐殖酸的长期影响。
Long-term effect of sewage sludge application on soil humic acids.
作者信息
Adani Fabrizio, Tambone Fulvia
机构信息
Dipartimento di Produzione Vegetale, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy.
出版信息
Chemosphere. 2005 Sep;60(9):1214-21. doi: 10.1016/j.chemosphere.2005.02.031. Epub 2005 Apr 1.
Sewage sludges are used in agriculture because they act as a fertilizer. Long-term studies are needed to evaluate the effect of sewage sludge on soil properties by paying particular attention to the soil organic matter. Soil plots were amended for 10 years with 1Mg dry matter ha(-1)year(-1) of sewage sludge. Chemical parameters such as total organic carbon (TOC), N, C/N ratio and CEC were determined when this period ended. Moreover, TOC was fractionated into humified and non-humified fractions. Humic acids (HA) were isolated and studied by elemental analysis, DRIFT, (1)H NMR and CPMAS 13C NMR spectroscopies. At the end of the tests, compared to the control soil, the sludge-amended soil did not exhibit change in total organic C and related humified fractions. However, the HA composition of the soil treated with sludge had developed an HA composition closer to that of the HA-sludge as a result of the enrichment of recalcitrant fractions contained in the sludge.
污水污泥因其可作为肥料而被用于农业。需要进行长期研究，通过特别关注土壤有机质来评估污水污泥对土壤性质的影响。用每年每公顷1毫克干物质的污水污泥对土壤地块进行了10年的改良。在这一时期结束时，测定了化学参数，如总有机碳（TOC）、氮、碳氮比和阳离子交换量（CEC）。此外，将TOC分为腐殖化和非腐殖化部分。通过元素分析、漫反射红外傅里叶变换光谱（DRIFT）、核磁共振氢谱（¹H NMR）和交叉极化魔角旋转核磁共振碳谱（CPMAS ¹³C NMR）对腐殖酸（HA）进行分离和研究。试验结束时，与对照土壤相比，添加污泥的土壤在总有机碳和相关腐殖化部分没有表现出变化。然而，由于污泥中难降解部分的富集，添加污泥处理的土壤的HA组成发展出了一种更接近HA-污泥的HA组成。
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