Capability of the Invasive Tree Prosopis glandulosa Torr. to Remediate Soil Treated with Sewage Sludge

Ahmed Mahmoud Abbas, Sameh K. Abd-Elmabod, Soad M. El-Ashry, Wagdi Saber Soliman, Noha El-Tayeh and Jesus M. Castillo
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Ahmed Mahmoud Abbas: Department of Biology, College of Science, King Khalid University, Abha 61413, Saudi Arabia
Sameh K. Abd-Elmabod: Soil and Water Use Department, Agriculture and Biological Research Division, National Research Centre, Cairo 12622, Egypt
Soad M. El-Ashry: Soil and Water Use Department, Agriculture and Biological Research Division, National Research Centre, Cairo 12622, Egypt
Wagdi Saber Soliman: Department of Horticulture, Faculty of Agriculture and Natural Resources, Aswan University, Aswan 81528, Egypt
Noha El-Tayeh: Department of Botany and Microbiology, Faculty of Science, South Valley University, Qena 83523, Egypt
Jesus M. Castillo: Departmento de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, 41080 Sevilla, Spain

Sustainability, 2019, vol. 11, issue 9, 1-13

Abstract: Sewage sludge improves agricultural soil and plant growth, but there are hazards associated with its use, including high metal(loid) contents. An experimental study was conducted under greenhouse conditions to examine the effects of sewage sludge on growth of the invasive tree Prosopis glandulosa , as well as to determine its phytoremediation capacity. Plants were established and grown for seven months along a gradient of sewage sludge content. Plant traits, soil properties, and plant and soil concentrations of N, P, K, Cd, Pb, Cu, Ni, Zn, Cr, Co, As, and Fe were recorded. The addition of sewage sludge led to a significant decrease in soil pH, and Ni, Co, and As concentrations, as well as an increase in soil organic matter and the concentrations of N, P, Cu, Zn, and Cr. Increasing sewage sludge content in the growth medium raised the total uptake of most metals by P. glandulosa plants due to higher biomass accumulation (taller plants with more leaves) and higher metal concentrations in the plant tissues. P. glandulosa concentrated more Cd, Pb, Cu, Zn, and Fe in its below-ground biomass (BGB) than in its above-ground biomass (AGB). P. glandulosa concentrated Ni, Co, and As in both BGB and AGB. P. glandulosa has potential as a biotool for the phytoremediation of sewage sludges and sewage-amended soils in arid and semi-arid environments, with a potential accumulation capability for As in plant leaves.

Keywords: alien plant; phytoremediation; metal; plant traits; sludge (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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