Enhancing phytoextraction of potentially toxic elements in a polluted floodplain soil using sulfur-impregnated organoclay

Sabry M Shaheen; Jianxu Wang; Ann-Christin Swertz; Xinbin Feng; Nanthi Bolan; Jörg Rinklebe

doi:10.1016/j.envpol.2019.02.073

Enhancing phytoextraction of potentially toxic elements in a polluted floodplain soil using sulfur-impregnated organoclay

Environ Pollut. 2019 May:248:1059-1066. doi: 10.1016/j.envpol.2019.02.073. Epub 2019 Feb 25.

Authors

Sabry M Shaheen¹, Jianxu Wang², Ann-Christin Swertz³, Xinbin Feng⁴, Nanthi Bolan⁵, Jörg Rinklebe⁶

Affiliations

¹ University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285, Wuppertal, Germany; University of Kafrelsheikh, Faculty of Agriculture, Department of Soil and Water Sciences, 33516, Kafr El-Sheikh, Egypt; King Abdulaziz University, Faculty of Meteorology, Environment, and Arid Land Agriculture, Department of Arid Land Agriculture, 21589, Jeddah, Saudi Arabia. Electronic address: shaheen@uni-wuppertal.de.
² University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285, Wuppertal, Germany; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550002, Guiyang, PR China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China. Electronic address: wangjianxu@vip.gyig.ac.cn.
³ University of Wuppertal, Faculty of Mechanical Engineering and Safety Engineering, Department of Safety Technology and Environmental Protection, Rainer-Gruenter-Straße, 42119, Wuppertal, Germany. Electronic address: swertz@uni-wuppertal.de.
⁴ State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550002, Guiyang, PR China. Electronic address: fengxinbin@vip.skleg.cn.
⁵ Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, NSW, 2308, Australia. Electronic address: nanthi.bolan@newcastle.edu.au.
⁶ University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285, Wuppertal, Germany; University of Sejong, Department of Environment, Energy and Geoinformatics, 98 Gunja-Dong, Guangjin-Gu, Seoul, Republic of Korea. Electronic address: rinklebe@uni-wuppertal.de.

PMID: 31091638
DOI: 10.1016/j.envpol.2019.02.073

Abstract

Enhancing metals phytoextraction using gentile mobilizing agents might be an appropriate approach to increase the phytoextraction efficiency and to shorten the phytoremediation duration. The effect of sulfur-impregnated organoclay (SIOC) on the redistribution of potentially toxic elements (PTEs) among their geochemical fractions in soils and their plant uptake has not yet been studied. Therefore, our aim is to investigate the role of different SIOC application doses (1%, 3% and 5%) on operationally defined geochemical fractions (soluble + exchangeable; bound to carbonate; manganese oxide; organic matter; sulfide; poorly- and well-crystalline Fe oxide; and residual fraction) of Cd, Cr, Cu, Ni, Pb, and Zn, and their accumulation by pea (Pisum sativum) and corn (Zea mays) in a greenhouse pot experiment using a polluted floodplain soil. The SIOC caused a significant decrease in soil pH, and an increase in organic carbon and total sulfur content in the soil. The addition of SIOC increased significantly the soluble + exchangeable fraction and bioavailability of the metals. The SIOC leads to a transformation of the residual, organic, and Fe-Mn oxide fractions of Cd, Cu, Ni, and Zn to the soluble + exchangeable fraction. The SIOC addition increased the potential mobile (non-residual) fraction of Cr and Pb. The SIOC increased the sulfide fraction of Cr, Ni, and Zn, while it decreased the same fraction for Cd, Cu, and Pb. The effect of SIOC on the redistribution of metal fractions increased with enhancing application dosages. Pea accumulated more metals than corn with greater accumulation in the roots than shoots. Application of the higher dose of SIOC promoted the metals accumulation by roots and their translocation to shoots of pea and corn. Our results suggest the potential suitability of SIOC for enhancing the phytomanagement of PTEs polluted soils and reducing the environmental risk of these pollutants.

Keywords: Bioavailability; Geochemical fractions; Phytoremediation; Risk management; Toxic metal(loid)s.

MeSH terms

Biodegradation, Environmental*
Humic Substances / analysis
Manganese Compounds / analysis
Metals, Heavy / analysis*
Oxides / analysis
Pisum sativum / metabolism*
Soil / chemistry*
Soil Pollutants / analysis*
Sulfur / analysis
Water Pollutants / analysis*
Zea mays / metabolism*

Substances

Humic Substances
Manganese Compounds
Metals, Heavy
Oxides
Soil
Soil Pollutants
Water Pollutants
manganese oxide
Sulfur