| 碱稳定污泥污水对土壤可提取有机碳和铜的影响 |
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| 引用本文： | LUO Yong-Ming,P. CHRISTIE. 碱稳定污泥污水对土壤可提取有机碳和铜的影响[J]. 土壤圈, 2002, 12(2): 97-102 |
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| 作者姓名： | LUO Yong-Ming P. CHRISTIE |
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| 作者单位： | [1]InstituteofSoilScience,theChineseAcademyofSciences,Nanjing210008（China） [2]DepartmentofAgriculturalandEnvironmentalScience,TheQueen′sUniversityofBelfast,NewforgeLane,BelfastBT95PX（U |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划)，江苏省青年科技人才基金 |
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| 摘 要： | An incubation experiment was conducted to evaluate the potential for water contamination with sludge-derived organic substances and copper following land application of alkaline-stabilised sewage sludge. Two contrasting sludge-amended soils were studied. Both soils were previously treated with urban and ruralalkaline biosolids separately at sludge application rates of 0, 30 and 120 t ha-1 fresh product. The air-driedsoil/sludge mixtures were wetted with distilled water, maintained at 40 % of water-holding capacity and equilibrated for three weeks at 4 ℃ before extraction. Subsamples were extracted with either distilled wateror 0.5 mol L-1 K2SO4 solution. The concentrations of organic C in the aqueous and chemical extracts were determined directly with a total organic carbon (TOC) analyser. The concentrations of Cu in the twoextracts were also determined by atomic absorption spectrophotometry The relationship between the two extractable organic C fractions was examined, together with that between extractable organic C concentration and extractable Cu concentration. Application of alkaline biosolids increased the concentrations of soil mobile organic substances and Cu. The results are discussed in terms of a possible increase in the potential for leaching of sludge-derived organics and Cu in the sludge-amended soils.
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| 关 键 词： | 土壤 泥土 污水 解压缩 滤取 金属 碳 铜 |
Effect of alkaline-stabilised sewage sludge on extractable organic carbon and copper in soils |
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| LUO Yong-Ming and P. CHRISTIE. Effect of alkaline-stabilised sewage sludge on extractable organic carbon and copper in soils[J]. Pedosphere, 2002, 12(2): 97-102 |
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| Authors: | LUO Yong-Ming and P. CHRISTIE |
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| Affiliation: | Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 (China);Department of Agricultural and Environmental Science, The Queen's University of Belfast, Newforge Lane, Belfast BT9 5PX (UK) |
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| Abstract: | An incubation experiment was conducted to evaluate the potential for water contamination with sludgederived organic substances and copper following land application of alkaline-stabilised sewage sludge. Two contrasting sludge-amended soils were studied. Both soils were previously treated with urban and rural alkaline biosolids separately at sludge application rates of 0, 30 and 120 t ha-1 fresh product. The air-dried soil/sludge mixtures were wetted with distilled water, maintained at 40 % of water-holding capacity and equilibrated for three weeks at 4 ℃ before extraction. Subsamples were extracted with either distilled water or 0.5 mol L-1 K2SO4 solution. The concentrations of organic C in the aqueous and chemical extracts were determined directly with a total organic carbon (TOC) analyser. The concentrations of Cu in the two extracts were also determined by atomic absorption spectrophotometry. The relationship between the two extractable organic C fractions was examined, together with that between extractable organic C concentration and extractable Cu concentration. Application of alkaline biosolids increased the concentrations of soil mobile organic substances and Cu. The results are discussed in terms of a possible increase in the potential for leaching of sludge-derived organics and Cu in the sludge-amended soils |
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| Keywords: | clay extracts leaching organic matter trace metals |
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