Toxicity of synthetic chelators and metal availability in poultry manure amended Cd, Pb and As contaminated agricultural soil

Adel R.A. Usman; Yaser A. Almaroai; Mahtab Ahmad; Meththika Vithanage; Yong Sik Ok

doi:10.1016/j.jhazmat.2013.04.032

Toxicity of synthetic chelators and metal availability in poultry manure amended Cd, Pb and As contaminated agricultural soil

Adel R.A. Usman, Yaser A. Almaroai, Mahtab Ahmad, Meththika Vithanage, Yong Sik Ok

Research output: Contribution to journal › Article › peer-review

67 Citations (Scopus)

Abstract

Chelating agents added to contaminated soils may increase solubility and phytoextraction efficiency of soil metals. However, they can create negative effects on soil biological quality. A 90-day incubation experiment was conducted to evaluate mixed effects of chelating agents and poultry manure on changes in available Cd, Pb and As, CO₂-C efflux, microbial biomass C, dissolved organic C (DOC), and N mineralization in metal-polluted agricultural soil. Application of poultry manure resulted in a considerable increase in soil pH, DOC, CO₂-C efflux, net N mineralization, net N nitrification, and microbial biomass C compared to those in unmanured soil. Availability of arsenic increased twice in manure amended soil due to changes in pH and DOC. However, adding poultry manure did not affect the concentrations of available Pb and Cd compared to those in control soil. Chelating agents increased CO₂-C efflux, DOC, and metal availability but decreased microbial biomass C and net N mineralization. Maximum decrease in microbial biomass C, net N mineralization, and net N nitrification, was observed in EDTA applied soil possibly due to high metal availability to soil microorganisms. Overall results revealed that the application of synthetic chelators in combination with poultry manure enhances available As and demonstrates better environment for soil biota.

Original language	English
Pages (from-to)	1022-1030
Number of pages	9
Journal	Journal of hazardous materials
Volume	262
DOIs	https://doi.org/10.1016/j.jhazmat.2013.04.032
Publication status	Published - 2013 Nov 15
Externally published	Yes

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Foundation through the National Research Foundation (NRF) of Korea, funded by the Ministry of Education, Science and Technology ( 2012R1A1B3001409 ). The instrumental analysis was partly supported by the Korea Basic Science Institute, the Environmental Research Institute and the Central Laboratory of the Kangwon National University in Korea.

Keywords

Chelating agent
Microbial biomass
Nitrogen mineralization
Phytoavailability
Soil biological quality
Soil respiration

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution
Health, Toxicology and Mutagenesis

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10.1016/j.jhazmat.2013.04.032

Cite this

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title = "Toxicity of synthetic chelators and metal availability in poultry manure amended Cd, Pb and As contaminated agricultural soil",

abstract = "Chelating agents added to contaminated soils may increase solubility and phytoextraction efficiency of soil metals. However, they can create negative effects on soil biological quality. A 90-day incubation experiment was conducted to evaluate mixed effects of chelating agents and poultry manure on changes in available Cd, Pb and As, CO2-C efflux, microbial biomass C, dissolved organic C (DOC), and N mineralization in metal-polluted agricultural soil. Application of poultry manure resulted in a considerable increase in soil pH, DOC, CO2-C efflux, net N mineralization, net N nitrification, and microbial biomass C compared to those in unmanured soil. Availability of arsenic increased twice in manure amended soil due to changes in pH and DOC. However, adding poultry manure did not affect the concentrations of available Pb and Cd compared to those in control soil. Chelating agents increased CO2-C efflux, DOC, and metal availability but decreased microbial biomass C and net N mineralization. Maximum decrease in microbial biomass C, net N mineralization, and net N nitrification, was observed in EDTA applied soil possibly due to high metal availability to soil microorganisms. Overall results revealed that the application of synthetic chelators in combination with poultry manure enhances available As and demonstrates better environment for soil biota.",

keywords = "Chelating agent, Microbial biomass, Nitrogen mineralization, Phytoavailability, Soil biological quality, Soil respiration",

author = "Usman, {Adel R.A.} and Almaroai, {Yaser A.} and Mahtab Ahmad and Meththika Vithanage and Ok, {Yong Sik}",

note = "Funding Information: This research was supported by Basic Science Research Foundation through the National Research Foundation (NRF) of Korea, funded by the Ministry of Education, Science and Technology ( 2012R1A1B3001409 ). The instrumental analysis was partly supported by the Korea Basic Science Institute, the Environmental Research Institute and the Central Laboratory of the Kangwon National University in Korea.",

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doi = "10.1016/j.jhazmat.2013.04.032",

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AU - Usman, Adel R.A.

AU - Almaroai, Yaser A.

AU - Ahmad, Mahtab

AU - Vithanage, Meththika

AU - Ok, Yong Sik

N1 - Funding Information: This research was supported by Basic Science Research Foundation through the National Research Foundation (NRF) of Korea, funded by the Ministry of Education, Science and Technology ( 2012R1A1B3001409 ). The instrumental analysis was partly supported by the Korea Basic Science Institute, the Environmental Research Institute and the Central Laboratory of the Kangwon National University in Korea.

PY - 2013/11/15

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N2 - Chelating agents added to contaminated soils may increase solubility and phytoextraction efficiency of soil metals. However, they can create negative effects on soil biological quality. A 90-day incubation experiment was conducted to evaluate mixed effects of chelating agents and poultry manure on changes in available Cd, Pb and As, CO2-C efflux, microbial biomass C, dissolved organic C (DOC), and N mineralization in metal-polluted agricultural soil. Application of poultry manure resulted in a considerable increase in soil pH, DOC, CO2-C efflux, net N mineralization, net N nitrification, and microbial biomass C compared to those in unmanured soil. Availability of arsenic increased twice in manure amended soil due to changes in pH and DOC. However, adding poultry manure did not affect the concentrations of available Pb and Cd compared to those in control soil. Chelating agents increased CO2-C efflux, DOC, and metal availability but decreased microbial biomass C and net N mineralization. Maximum decrease in microbial biomass C, net N mineralization, and net N nitrification, was observed in EDTA applied soil possibly due to high metal availability to soil microorganisms. Overall results revealed that the application of synthetic chelators in combination with poultry manure enhances available As and demonstrates better environment for soil biota.

AB - Chelating agents added to contaminated soils may increase solubility and phytoextraction efficiency of soil metals. However, they can create negative effects on soil biological quality. A 90-day incubation experiment was conducted to evaluate mixed effects of chelating agents and poultry manure on changes in available Cd, Pb and As, CO2-C efflux, microbial biomass C, dissolved organic C (DOC), and N mineralization in metal-polluted agricultural soil. Application of poultry manure resulted in a considerable increase in soil pH, DOC, CO2-C efflux, net N mineralization, net N nitrification, and microbial biomass C compared to those in unmanured soil. Availability of arsenic increased twice in manure amended soil due to changes in pH and DOC. However, adding poultry manure did not affect the concentrations of available Pb and Cd compared to those in control soil. Chelating agents increased CO2-C efflux, DOC, and metal availability but decreased microbial biomass C and net N mineralization. Maximum decrease in microbial biomass C, net N mineralization, and net N nitrification, was observed in EDTA applied soil possibly due to high metal availability to soil microorganisms. Overall results revealed that the application of synthetic chelators in combination with poultry manure enhances available As and demonstrates better environment for soil biota.

KW - Chelating agent

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KW - Nitrogen mineralization

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Toxicity of synthetic chelators and metal availability in poultry manure amended Cd, Pb and As contaminated agricultural soil

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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