Arid
DOI10.3184/095422904782775054
Transformation of cadmium in soils treated with Cd-enriched sewage sludge and cadmium chloride under field capacity and flooding moisture regimes
Kandpal, G; Ram, B; Srivastava, PC
通讯作者Srivastava, PC
来源期刊CHEMICAL SPECIATION AND BIOAVAILABILITY
ISSN0954-2299
EISSN2047-6523
出版年2004
卷号16期号:3页码:111-118
英文摘要

A laboratory incubation study was conducted to examine the long-term (16 m) dynamics of transformation of Cd in soils polluted by Cd-enriched sewage sludge or cadmium chloride under field capacity (1/3 bar) and flooding moisture regimes. Cadmium transformation was investigated by determining: (i) different operationally defined chemical fractions of Cd; (ii) DTPA extractable and (iii) 1M CaCl2 extractable Cd. Under field capacity moisture regime, Cd added through cadmium chloride transformed into NaOAc extractable and residual Cd fractions while Cd added through Cd-enriched sludge was transformed from water soluble + exchangeable fraction into the NaOAc extractable, and organically bound, fractions in all soils and also into the residual fraction in neutral soil. Under a flooding moisture regime, Cd added through cadmium chloride transformed from water soluble + exchangeable Cd fraction into the residual fraction in acidic soil and into NaOAc extractable, and residual, fractions in alkaline soil. However, in neutral soil, residual Cd fraction underwent a small decrease to cause a minor increase in the water soluble + exchangeable, and organically bound, Cd fractions. With Cd-enriched sludge as the Cd source under a flooding moisture regime, water soluble + exchangeable Cd transformed into NaOAc extractable fraction in acidic and alkaline soils but into an organically bound fraction in neutral soil. Flooding decreased DTPA, and 1M CaCl2 extractable, Cd in soils polluted through cadmium chloride or Cd-enriched sewage sludge as compared to the field capacity moisture regime.


英文关键词cadmium chemical transformation sewage sludge soil moisture regimes
类型Article
语种英语
国家India
收录类别SCI-E
WOS记录号WOS:000225077000004
WOS关键词TOXIC HEAVY-METALS ; ARID-ZONE SOILS ; ZINC ; AVAILABILITY ; COPPER ; FORMS ; EXTRACTABILITY ; REDISTRIBUTION ; ACCUMULATION ; SOLUBILITY
WOS类目Biochemistry & Molecular Biology ; Environmental Sciences ; Toxicology
WOS研究方向Biochemistry & Molecular Biology ; Environmental Sciences & Ecology ; Toxicology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/146456
作者单位(1)Govind Ballabh Pant Univ Agr & Technol, Dept Chem, Pantnagar 263145, Uttar Pradesh, India;(2)Govind Ballabh Pant Univ Agr & Technol, Dept Soil Sci, Pantnagar 263145, Uttar Pradesh, India
推荐引用方式
GB/T 7714
Kandpal, G,Ram, B,Srivastava, PC. Transformation of cadmium in soils treated with Cd-enriched sewage sludge and cadmium chloride under field capacity and flooding moisture regimes[J],2004,16(3):111-118.
APA Kandpal, G,Ram, B,&Srivastava, PC.(2004).Transformation of cadmium in soils treated with Cd-enriched sewage sludge and cadmium chloride under field capacity and flooding moisture regimes.CHEMICAL SPECIATION AND BIOAVAILABILITY,16(3),111-118.
MLA Kandpal, G,et al."Transformation of cadmium in soils treated with Cd-enriched sewage sludge and cadmium chloride under field capacity and flooding moisture regimes".CHEMICAL SPECIATION AND BIOAVAILABILITY 16.3(2004):111-118.
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