Long-term effect of sewage sludge application on soil humic acids

被引：57

作者：

Adani, F ^{[1
]}

Tambone, F ^{[1
]}

机构：

[1] Univ Milan, Dipartimento Prod Vegetale, I-20133 Milan, Italy

来源：

CHEMOSPHERE | 2005年 / 60卷 / 09期

关键词：

DRIFT; NMR; long-term application; spectroscopic analysis; soil;

D O I：

10.1016/j.chemosphere.2005.02.031

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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 1 Mg 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, H-1 NMR and CPMAS, C-13 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. (C) 2005 Elsevier Ltd. All rights reserved.

引用

页码：1214 / 1221

页数：8

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