title: Application of acclimated sewage sludge as a bio-augmentation/bio-stimulation strategy for remediating chlorpyrifos contamination in soil with/without cadmium.
abstract: This experiment was performed to investigate the effects of acclimated sewage sludge (ASS) and sterilized ASS on the fates of chlorpyrifos (CP) in soil with or without cadmium (Cd), as well as the improvement of soil biochemical properties. Results showed that both ASS and sterilized ASS could significantly promote CP dissipation, and the groups with ASS had the highest efficiency on CP removal, whose degradation rates reached 71.3%-85.9% at the 30th day (40.4%-50.2% higher than non-sludge groups). Besides, the degradation rate of CP was not severely influenced by the existence of Cd, and the population of soil microorganism dramatically increased after adding sludge. The soil enzyme activities (dehydrogenase, acid phosphatase and FDA hydrolase activities) ranked from high to low were as follows: groups with sterilized ASS>groups with ASS>groups without sludge. Simultaneously, 16S rRNA gene sequencing revealed that ASS changed bacterial community structure and diversity in soil. In addition, alkali-hydrolyzable nitrogen and Olsen- phosphorus increased after application of sludge, indicating that the addition of ASS (or sterilized ASS) could effectively improve soil fertility.
authors.affiliation: Key Laboratory of Bio-resource and Eco-environment (Ministry of Education), College of Life Science, Sichuan University, Chengdu, Sichuan 610064, China.
authors.forename: Can
authors.initials: C
authors.lastname: Wang
authors.affiliation: Key Laboratory of Bio-resource and Eco-environment (Ministry of Education), College of Life Science, Sichuan University, Chengdu, Sichuan 610064, China.
authors.forename: Zhiren
authors.initials: Z
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Bio-resource and Eco-environment (Ministry of Education), College of Life Science, Sichuan University, Chengdu, Sichuan 610064, China.
authors.forename: Hongdan
authors.initials: H
authors.lastname: Liu
authors.affiliation: Key Laboratory of Bio-resource and Eco-environment (Ministry of Education), College of Life Science, Sichuan University, Chengdu, Sichuan 610064, China.
authors.forename: Junjie
authors.initials: J
authors.lastname: Li
authors.affiliation: Key Laboratory of Bio-resource and Eco-environment (Ministry of Education), College of Life Science, Sichuan University, Chengdu, Sichuan 610064, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Key Laboratory of Bio-resource and Eco-environment (Ministry of Education), College of Life Science, Sichuan University, Chengdu, Sichuan 610064, China. Electronic address: xuheng64@sina.com.
authors.forename: Heng
authors.initials: H
authors.lastname: Xu
mesh_terms: D001673:Biodegradation, Environmental; D002104:Cadmium / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D004390:Chlorpyrifos / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005308:Fertilizers; D009584:Nitrogen; D010758:Phosphorus; D012722:Sewage; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism
chemical_list: D005308:Fertilizers; D012722:Sewage; D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium; D010758:Phosphorus; D004390:Chlorpyrifos; D009584:Nitrogen
keywords: 3, 5, 6-Trichloro-2-pyridinol; Biochemical properties; Biodegradation; Microbial activities; Soil fertility