scholarly journals Effect of Chelant-Based Soil Washing and Post-Treatment on Pb, Cd, and Zn Bioavailability and Plant Uptake

2021 ◽  
Vol 232 (10) ◽  
Author(s):  
Christoph Noller ◽  
Wolfgang Friesl-Hanl ◽  
Rebecca Hood-Nowotny ◽  
Markus Puschenreiter ◽  
Andrea Watzinger
Keyword(s):  
Plant Uptake ◽  
Total Concentration ◽  
Soil Washing ◽  
Organic Amendments ◽  
Ex Situ ◽  
Metal Availability ◽  
Soil Extracts ◽  
Aqua Regia ◽  
Edta Complexes ◽  
Zn Bioavailability

Abstract The remediation of Pb, Cd, and Zn contaminated soil by ex situ EDTA washing was investigated in two pot experiments. We tested the influence of (i) 0, 0.5, 1.0, and 1.5%wt zero-valent iron (ZVI) and (ii) a combination of 5%wt vermicompost, 2%wt biochar, and 1%wt ZVI on the metal availability in EDTA-washed soil using different soil extracts (Aqua regia, NH4NO3) and plant concentrations. We found that EDTA soil washing significantly reduced the total concentration of Pb, Cd, and Zn and significantly reduced the Cd and Zn plant uptake. Residual EDTA was detected in water extracts causing the formation of highly available Pb-EDTA complexes. While organic amendments had no significant effect on Pb behavior in washed soils, an amendment of ≥ 1%wt ZVI successfully reduced EDTA concentrations, Pb bioavailability, and plant uptake. Our results suggest that Pb-EDTA complexes adsorb to a Fe oxyhydroxide layer, quickly developing on the ZVI surface. The increase in ZVI application strongly decreases Zn concentrations in plant tissue, whereas the uptake of Cd was not reduced, but even slightly increased. Soil washing did not affect plant productivity and organic amendments improved biomass production.

Metal availability, soil nutrient, and enzyme activity in response to application of organic amendments in Cd-contaminated soil

2017 ◽  
Vol 25 (3) ◽  
pp. 2425-2435 ◽  
Author(s):  
Zhanbiao Yang ◽  
Lixia Liu ◽  
Yanfeng Lv ◽  
Zhang Cheng ◽  
Xiaoxun Xu ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Contaminated Soil ◽  
Organic Amendments ◽  
Soil Nutrient ◽  
Metal Availability

scholarly journals The influence of various organic amendments on the bioavailability and plant uptake of cadmium present in mine-degraded soil

2018 ◽  
Vol 636 ◽  
pp. 810-817 ◽  
Author(s):  
Muhammad Amjad Khan ◽  
Xiaodong Ding ◽  
Sardar Khan ◽  
Mark L. Brusseau ◽  
Anwarzeb Khan ◽  
...  
Keyword(s):  
Plant Uptake ◽  
Organic Amendments ◽  
Degraded Soil

Mitigation in availability and toxicity of multi-metal contaminated soil by combining soil washing and organic amendments stabilization

2020 ◽  
Vol 201 ◽  
pp. 110807 ◽  
Author(s):  
Sajjad Hazrati ◽  
Mohsen Farahbakhsh ◽  
Ghasem Heydarpoor ◽  
Ali Asghar Besalatpour
Keyword(s):  
Contaminated Soil ◽  
Soil Washing ◽  
Organic Amendments

Ex situ diesel contaminated soil washing with mechanical methods

2001 ◽  
Vol 14 (9) ◽  
pp. 1093-1100 ◽  
Author(s):  
D. Feng ◽  
L. Lorenzen ◽  
C. Aldrich ◽  
P.W. Maré
Keyword(s):  
Contaminated Soil ◽  
Soil Washing ◽  
Ex Situ ◽  
Mechanical Methods

The orthophosphate content of bicarbonate soil extracts

Soil Research ◽  
2001 ◽  
Vol 39 (2) ◽  
pp. 415 ◽  
Author(s):  
Joanne L. Coventry ◽  
David J. Halliwell ◽  
David M. Nash
Keyword(s):  
Molecular Weight ◽  
Plant Uptake ◽  
High Performance ◽  
Average Amount ◽  
Soil Extracts ◽  
Specific Identification ◽  
Soil P ◽  
Olsen P ◽  
Soil Solutions ◽  
Future Work

The Olsen P and Colwell P bicarbonate extraction procedures are empirically derived tests that provide an estimate of the soil P that is available for plant uptake. This paper examines each procedure using high performance liquid chromatography with flow injection analysis detection (HPLC-FIA) to specifically measure orthophosphate in bicarbonate extracts. Extract solutions from 3 soils of contrasting plant-available soil P contents were analysed for orthophosphate, total filtered (<15—45 µm) P (TFP), and either Olsen P or Colwell P. The amounts of P extracted by the Olsen procedure were not statistically different from orthophosphate (HPLC-FIA) (P > 0.05), suggesting the Olsen P test was a good measure of orthophosphate, the most immediately plant-available form of P. However, the average amount of P extracted by the Colwell procedure was 14% higher (P < 0.01) than the corresponding average orthophosphate concentration, presumably due to the presence of labile organic/condensed P, colloidal associated orthophosphate, or high molecular weight reactive P. These results suggest that there is a pool of non-orthophosphate P present in the molybdate reactive Colwell P extract that is potentially plant available. Future work should focus on specific identification of P compounds extracted from soils and soil solutions to examine their role as a source of P to plants.

scholarly journals Coupling of Anodic Oxidation and Soil Remediation Processes: A Review

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4309 ◽  
Author(s):  
Maiara Barbosa Ferreira ◽  
Aline Maria Sales Solano ◽  
Elisama Vieira dos Santos ◽  
Carlos A. Martínez-Huitle ◽  
Soliu O. Ganiyu
Keyword(s):  
Anodic Oxidation ◽  
Soil Remediation ◽  
Contaminated Soils ◽  
Soil Washing ◽  
Ex Situ ◽  
Combined Processes ◽  
Environmental Consequences ◽  
Efficient Coupling ◽  
Remediation Process

In recent years, due to industrial modernization and agricultural mechanization, several environmental consequences have been observed, which make sustainable development difficult. Soil, as an important component of ecosystem and a key resource for the survival of human and animals, has been under constant contamination from different human activities. Contaminated soils and sites require remediation not only because of the hazardous threat it possess to the environment but also due to the shortage of fresh land for both agriculture and urbanization. Combined or coupled remediation technologies are one of the efficient processes for the treatment of contaminated soils. In these technologies, two or more soil remediation techniques are applied simultaneously or sequentially, in which one technique complements the other, making the treatment very efficient. Coupling anodic oxidation (AO) and soil remediation for the treatment of soil contaminated with organics has been studied via two configurations: (i) soil remediation, ex situ AO, where AO is used as a post-treatment stage for the treatment of effluents from soil remediation process and (ii) soil remediation, in situ AO, where both processes are applied simultaneously. The former is the most widely investigated configuration of the combined processes, while the latter is less common due to the greater diffusion dependency of AO as an electrode process. In this review, the concept of soil washing (SW)/soil flushing (SF) and electrokinetic as soil remediation techniques are briefly explained followed by a discussion of different configurations of combined AO and soil remediation.

scholarly journals Prediction of As, Cd, Cr, Hg, Ni, and Se Concentrations in Organic Amendments Using Portable X-ray Fluorescence and Multivariate Modeling

2020 ◽  
Vol 10 (17) ◽  
pp. 5726
Author(s):  
Rafael López-Núñez ◽  
Fátima Ajmal-Poley ◽  
Pilar Burgos-Doménech
Keyword(s):  
Organic Amendments ◽  
Linear Functions ◽  
Organic Fertilizers ◽  
Regression Equations ◽  
Sewage Sludges ◽  
Aqua Regia ◽  
X Ray ◽  
Exchange Programme ◽  
Analytical Laboratories

Portable X-ray fluorescence (pXRF) has been a widely used technique in various applications. However, its use for the analysis of organic amendments (composts, sewage sludges, organic fertilizers) is scarce. In these matrices, concentrations of some elements are below their detection limit. The objective of this work was to find multiple linear regression equations that were able to predict the aqua-regia-soluble concentrations of the elements As, Cd, Cr, Hg, Ni, and Se using the pXRF readings of other measurable elements as predictor variables. For this, a set of 30 samples of organic amendments (composts, sewage sludges, and organic fertilizers) from the Manure and Refuse Sample Exchange Programme of the Wageningen Evaluating Programs for Analytical Laboratories (MARSEP-WEPAL) was used. Several amendment type-dependent single or multiple linear functions were found based on 1, 2, or 3 predictors. The predictor readings corresponded to the concentration of elements of geogenic (Fe, Si, Ti, Cl, Zr Al, Ca, S, Mn, and Ba), anthropogenic (Zn and Pb), and agricultural (P and K) origin. The regression coefficients of these functions were r = 0.90–0.99; therefore, they allowed for the quantitative determination of the target elements. These results will allow for fast and reliable analysis of organic amendments using pXRF that is valid for quality control in treatment plants.

scholarly journals Treatment of ex-situ soil-washing fluids polluted with petroleum by anodic oxidation, photolysis, sonolysis and combined approaches

2017 ◽  
Vol 310 ◽  
pp. 581-588 ◽  
Author(s):  
Elisama Vieira dos Santos ◽  
Cristina Sáez ◽  
Pablo Cañizares ◽  
Djalma Ribeiro da Silva ◽  
Carlos A. Martínez-Huitle ◽  
...  
Keyword(s):  
Anodic Oxidation ◽  
Soil Washing ◽  
Ex Situ

Heavy metal availability to plants in soils irrigated with wastewater from Mexico City

1995 ◽  
Vol 32 (12) ◽  
pp. 29-34 ◽  
Author(s):  
Christina Siebe
Keyword(s):  
Heavy Metal ◽  
Mexico City ◽  
Metal Uptake ◽  
Metal Availability ◽  
Tolerance Limits ◽  
Aqua Regia ◽  
Untreated Wastewater ◽  
Metal Contents ◽  
Irrigation Time ◽  
The Relationship

The relationship between three different heavy metal fractions in soils irrigated for long periods of time with untreated wastewater from Mexico City and the metal uptake by alfalfa (Medicago sativa) was studied in order to evaluate actual accumulation levels in soils, as well as to establish which extracting solution characterizes most precisely the availability of selected heavy metals to plants. Cd, Pb, Cu and Zn were analyzed in aqua regia, 1 M NH4NO3 and water extracts from 50 soil samples and correlated with total contents in alfalfa tissue collected at the same sites. Heavy metal contents of the 3 fractions increase significantly with irrigation time, but European tolerance limits are slightly exceeded only for Cd at some sites. Plant uptake of Cd and Pb also increases the longer the soils have been irrigated and correlates best with aqua regia extracts from soils.

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