Dynamics of Humic Substance-Complexed Copper and Copper Leaching During Composting of Chicken Manure

WANG Xu-Dong; CHEN Xian-Ni; A. S. ALI; LIU Shuai; LU Li-Lan

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Dynamics of Humic Substance-Complexed Copper and Copper Leaching During Composting of Chicken Manure

机译：鸡粪堆肥过程中腐殖质复杂的铜和铜的浸出动力学

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Chicken manure was composted for 110 d to evaluate changes in organic carbon (C) and humic substance-complexed copper (HS-Cu) extracted with water,sodium hydroxide (NaOH),and sodium pyrophosphate and sodium hydroxide mixture (Na 4 P 2 O 7-NaOH).The average HS-Cu content from the Na 4 P 2 O 7-NaOH extraction accounted for 46.8% of the total Cu in the compost,followed by those from the NaOH and water extractions,which accounted for 34.5% and 6% of the total Cu in the compost,respectively.NaOH-Na 4 P 2 O 7-extractable HS-Cu increased throughout the composting process.NaOH-extractable HS-Cu increased during the first 50 d of composting and then leveled off.Water-extractable HS-Cu enhanced during the first 21 d and then decreased.Water-extractable HS-Cu was not correlated to NaOH-or NaOH-Na 4 P 2 O 7-extractable organic C.The average amount of Cu leached from the compost was about 20% of the total Cu in the chicken manure and Cu leaching increased during the first 35 d of composting and then decreased.Leaching of Cu was significantly correlated to the concentrations of HS-Cu extracted with NaOH and water,but was not correlated to the concentration of HS-Cu extracted with NaOH-Na 4 P 2 O 7.Thus,NaOH-and water-extractable HS-Cu were relatively labile and NaOH-Na 4 P 2 O 7-extractable HS-Cu was relatively immobile.Composting process after rapid decomposition could result in low potential of Cu leaching because of formation of more NaOH-Na 4 P 2 O 7-extractable HS-Cu.

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《土壤圈（英文版）》 |2010年第2期|245-251|共7页
作者
WANG Xu-Dong; CHEN Xian-Ni; A. S. ALI; LIU Shuai; LU Li-Lan;
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College of Resource and Environment, Northwest A & F University, Yangling, Shaanxi 712100 China;

College of Resource and Environment, Northwest A & F University, Yangling, Shaanxi 712100 China;

College of Resource and Environment, Northwest A & F University, Yangling, Shaanxi 712100 China;

College of Resource and Environment, Northwest A & F University, Yangling, Shaanxi 712100 China;

College of Resource and Environment, Northwest A & F University, Yangling, Shaanxi 712100 China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
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Dynamics of Humic Substance-Complexed Copper and Copper Leaching During Composting of Chicken Manure

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