THE EFFECT OF EDTA AND CITRIC ACID ON SOIL ENZYMES ACTIVITY, SUBSTRATE INDUCED RESPIRATION AND PB AVAILABILITY IN A CONTAMINATED SOIL

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HOSSEINI S.S.; LAKZIAN A.; HALAJNIA A.

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Journal: Journal of Water and Soil Year:2017 | Volume:30 | Issue:6 Page(s): 2032-2045

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Title

THE EFFECT OF EDTA AND CITRIC ACID ON SOIL ENZYMES ACTIVITY, SUBSTRATE INDUCED RESPIRATION AND PB AVAILABILITY IN A CONTAMINATED SOIL

Author(s)

HOSSEINI S.S. | LAKZIAN A. | HALAJNIA A. | Issue Writer Certificate

Keywords

CITRIC ACIDQ1

EDTAQ2

ENZYME ACTIVITYQ1

PBQ2

SIRQ1

Abstract

Introduction: Application of EDTA may increase the heavy metal availability and phytoextraction efficiency in contaminated soils. In spite of that, it might also have some adverse effects on soil biological properties. Metals as freeions are considered to be severely toxic, whereas the complexed form of these metalswith organic compounds or Fe/Mn oxides may be less available to soil microbes. However, apart from this fact, some of these compounds like EDTA and EDTA-metal complexes have low bio- chemo- and photodegradablity and high solubility in their own characteristics andable to cause toxicity in soil environment. So more attentions have been paid to use of low molecular weight organic acids (LMWOAs) such as CITRIC ACID because of having less unfavorable effects to the environment. CITRIC ACID increases heavy metals solubility in soils and it also improves soil microbial activity indirectly. Soil enzymes activity is a good indicator of soil quality, and it is more suitable for monitoring the soil quality compared to physical or chemical indicators. The aims of this research were to evaluate the changes of dehydrogenase, urease and alkaline phosphomonoesterase activities, substrate-induced respiration (SIR) and PB availability after EDTA and CITRIC ACID addition into a contaminated soil with PBCl2.Materials and Methods: An experiment was conducted in a completely randomized design with factorial arrangement and three replications in greenhouse condition. The soil samples collected from surface horizon (0-20 cm) of the Typic haplocalsids, located in Mashhad, Iran. Soil samples were artificially contaminated with PBCl2 (500 mg PB per kg of soil) and incubated for one months in 70 % of water holding capacity at room temperature. The experimental treatments included control, 3 and 5 mmol EDTA (EDTA3 and EDTA5) and CITRIC ACID (CA3 and CA5) per kg of soil. Soil enzymes activity, substrate-induced respiration and PB availability of soil samples were determined by standard methods after 7, 14, 21 and 28 days of chelates addition.

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APA: Copy

HOSSEINI, S.S., LAKZIAN, A., & HALAJNIA, A.. (2017). THE EFFECT OF EDTA AND CITRIC ACID ON SOIL ENZYMES ACTIVITY, SUBSTRATE INDUCED RESPIRATION AND PB AVAILABILITY IN A CONTAMINATED SOIL. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), 30(6 ), 2032-2045. SID. https://sid.ir/paper/141808/en

Vancouver: Copy

HOSSEINI S.S., LAKZIAN A., HALAJNIA A.. THE EFFECT OF EDTA AND CITRIC ACID ON SOIL ENZYMES ACTIVITY, SUBSTRATE INDUCED RESPIRATION AND PB AVAILABILITY IN A CONTAMINATED SOIL. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)[Internet]. 2017;30(6 ):2032-2045. Available from: https://sid.ir/paper/141808/en

IEEE: Copy

S.S. HOSSEINI, A. LAKZIAN, and A. HALAJNIA, “THE EFFECT OF EDTA AND CITRIC ACID ON SOIL ENZYMES ACTIVITY, SUBSTRATE INDUCED RESPIRATION AND PB AVAILABILITY IN A CONTAMINATED SOIL,” JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), vol. 30, no. 6 , pp. 2032–2045, 2017, [Online]. Available: https://sid.ir/paper/141808/en

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