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题名: Absorption of crops grown in loess improved by sludge for heavy metals Ni and Cd in the seedling stage
作者: Zeng, ZZ; Gao, DX; Gou, JF; Li, GL; Wang, HC; Nan, ZR
收录类别: CPCI-S
出版日期: 2016
会议名称: 10th International Conference on Waste Management and Technology (ICWMT)
会议日期: OCT 28-30, 2015
会议地点: Mianyang, PEOPLES R CHINA
英文摘要: Sludge land application is now one of the most promising approaches for disposing urban sewage sludge at home and abroad. Particularly in the northwest loess areas, sludge that abounds in organic matters and nutrients including N and P is applicable to improve the barren loess with loose structure. Meanwhile, sludge with heavy metals is another research subject of concern. This study selected corn and wheat (two main crops in northwest of China) as test crops, and the loess added with different dry weights of composted sludge as experimental soil. The crops were planted in pots to compare the influences of different dry weights of composted sludge on the seedling growth of the crops (corn and wheat) and the absorption of heavy metals (Ni and Cd). The result indicated that composted sludge with dry weights ranging from 1% to 10% can promote the seedling growth of corn and wheat and 1% was optimal for the growth with increases about 14% and 3% for corn and wheat respectively. While more than 10% of dry weight can inhibit the growth and the inhibition effect kept pace with the dry weight of composted sludge. At the end of the experiment, majority of the Ni and Cd were still accumulated in the matrix and the absorption coefficients of Ni and Cd in crops were about 0.02-0.17 and 0.02-0.12 respectively. Comparing with the control experiment, sludge land application can improve the performance of the loess and provide Ni and Cd for corn and wheat. When 5% and 10% of composted sludge was added, the content of Ni and Cd contained in the experimental soil met the secondary standard (pH>7.5, Ni <= 60 mg/kg and Cd <= 0.6mg/kg) set by the Environmental Quality Standard for Soils (GB15618-1995). Therefore, to apply sludge in land use, the annual addition amount of sludge needs to satisfy both the Disposal of Sludge from Municipal Wastewater Treatment Plant-Control Standards for Agricultural Use and the Environmental Quality Standard for Soils. (C) 2016 The Authors. Published by Elsevier B.V.
关键词: composted sludge ; heavy metal ; loess ; crop ; absorption
作者部门: [Zeng, Zhengzhong ; Gao, Dongxiang ; Gou, Jianfeng ; Li, Guoliang ; Wang, Houcheng ; Nan, Zhongren] Lanzhou Univ, Gansu Key Lab Environm Pollut Predict & Control, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China
通讯作者: Gou, JF (reprint author), Lanzhou Univ, Gansu Key Lab Environm Pollut Predict & Control, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China.
学科分类: Engineering; Environmental Sciences & Ecology
会议录: SELECTED PROCEEDINGS OF THE TENTH INTERNATIONAL CONFERENCE ON WASTE MANAGEMENT AND TECHNOLOGY
卷号: 31
页码: 698-706
出版者: ELSEVIER
出版地: AMSTERDAM
语种: 英语
DOI: 10.1016/j.proenv.2016.02.052
ISSN号: 1878-0296
WOS记录号: WOS:000387449800092
IR记录号: WOS:000387449800092
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内容类型: 会议论文
URI标识: http://ir.lzu.edu.cn/handle/262010/189640
Appears in Collections:资源环境学院_会议论文

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Recommended Citation:
Zeng, ZZ,Gao, DX,Gou, JF,et al. Absorption of crops grown in loess improved by sludge for heavy metals Ni and Cd in the seedling stage[C]. 见:10th International Conference on Waste Management and Technology (ICWMT). Mianyang, PEOPLES R CHINA. OCT 28-30, 2015.
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