scholarly journals Downward Movement of Potentially Toxic Elements in Biosolids Amended Soils

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Silvana Irene Torri ◽  
Rodrigo Studart Corrêa
Keyword(s):  
Groundwater Contamination ◽  
Soil Solution ◽  
Soil Profile ◽  
Toxic Elements ◽  
Solid Phase ◽  
Land Application ◽  
Potentially Toxic Elements ◽  
Downward Movement ◽  
Amended Soils

Potentially toxic elements (PTEs) in soils are mainly associated with the solid phase, bound to the surface of solid components, or precipitated as minerals. For most PTEs, only a small portion is dissolved in the soil solution. However, there is an interest in following the fate of mobile PTEs in the environment, for a growing amount of evidence indicates that downward movement of PTEs may occur in biosolids amended soils, leading to groundwater contamination. Therefore, it is crucial to understand the factors that control the release of these elements after land application of biosolids, in order to overcome problems related to downward movement of PTEs in the soil profile.

scholarly journals Trace Metal Concentrations in the Liquid Phase of  Phosphate Rock-Treated Soils

2006 ◽  
Vol 55 (1) ◽  
pp. 203-212 ◽  
Author(s):  
Julianna Csillag ◽  
A. Lukács ◽  
E. Osztoics ◽  
P. Csathó ◽  
Gy. Baczó
Keyword(s):  
Soil Solution ◽  
Sandy Soil ◽  
Phosphate Rock ◽  
Toxic Elements ◽  
Time Frame ◽  
Potentially Toxic Elements ◽  
Clay Loam ◽  
Phosphate Rocks ◽  
Clay Loam Soil ◽  
Loam Soil

Concentrations of potentially toxic elements were determined in the soil solution of two soils (acidic sandy and slightly acidic clay loam) treated with phosphate rocks having high Cd content in a pot experiment. Relative concentrations characterizing the mobility of metals (expressed as soil solution concentrations in percentage of their “total” amounts in the phosphate rock-treated soil) decreased with increasing phosphate rock rates in the sandy soil. Mn@Sr>Cd@Co were the most, while Pb and Cr the least mobile elements. The relative concentrations in the clay loam soil were much lower than in the sandy soil and they practically remained constant with increasing phosphate rock rates. It was concluded that in the experimental time frame the environmental risk did not increase with the increase of phosphate rock rate. 

scholarly journals Pyrolysis Treatment Enables Safe Application of Sewage Sludge in Horticulture – Tracking Potentially Toxic Elements Through the Biochar-Soil-Plant System in Tomato

2021 ◽  
Author(s):  
Samaneh Tahervand ◽  
Mohsen Jalali ◽  
Wolfram Buss
Keyword(s):  
Sewage Sludge ◽  
Toxic Elements ◽  
Tomato Fruit ◽  
Human Health Risk ◽  
Potentially Toxic Elements ◽  
Sludge Treatment ◽  
Amended Soils ◽  
Sewage Sludge Treatment ◽  
Cu And Zn ◽  
Amended Soil

Abstract Biochar production via pyrolysis is a promising option to be used for sewage sludge treatment. Here we investigated the uptake of potentially toxic elements (PTEs) from sewage sludge and its biochar (450°C) into cherry tomato plants and its fruits in pot experiments (2, 5 and 10%) to assess the health risks associated with fruit consumption. We further studied the ability of the PTE-rich amendments to immobilize PTEs already present in soil through spiking of soil (pH 7.4) with Cd, Cu and Zn. Our findings suggest that tomato consumption is not a human health risk when grown in soil amended with sewage sludge and its biochar; in most treatments PTE uptake into fruits was similar to the control. Vegetative plant growth was highest in sewage sludge-amended soils. Yet 5 and 10% biochar-amended soils significantly increased tomato fruit yield compared to untreated sewage sludge application (400–500% higher than 10% sewage sludge-amended soil) and significantly decreased fruit uptake of Cu and Zn. Importantly, biochar also significantly immobilized PTEs present in contaminated (spiked) soil. As expected, available (DTPA-extractable) PTE contents were typically lower in biochar-amended soil and sequential extraction indicated that the PTEs were predominantly bound in more recalcitrant soil fractions (organic matter associated and Fe-Mn oxides-bound). We conclude that pyrolysis can be a key technology for sewage sludge treatment and subsequent use of the biochar in urban, and potentially even contaminated, horticultural sites.

Chemical and biological immobilization mechanisms of potentially toxic elements in biochar-amended soils

2019 ◽  
Vol 50 (9) ◽  
pp. 903-978 ◽  
Author(s):  
Tharanga Bandara ◽  
Ashley Franks ◽  
Jianming Xu ◽  
Nanthi Bolan ◽  
Hailong Wang ◽  
...  
Keyword(s):  
Toxic Elements ◽  
Potentially Toxic Elements ◽  
Amended Soils

scholarly journals Current Status and Temporal Trend of Potentially Toxic Elements Pollution in Agricultural Soil in the Yangtze River Delta Region: A Meta-Analysis

2021 ◽  
Vol 18 (3) ◽  
pp. 1033
Author(s):  
Shufeng She ◽  
Bifeng Hu ◽  
Xianglin Zhang ◽  
Shuai Shao ◽  
Yefeng Jiang ◽  
...  
Keyword(s):  
Yangtze River ◽  
Agricultural Soil ◽  
Toxic Elements ◽  
Temporal Trend ◽  
Meta Analysis ◽  
Yangtze River Delta ◽  
Potentially Toxic Elements ◽  
River Delta ◽  
The Yangtze River ◽  
The Yangtze River Delta

Potentially toxic elements (PTEs) pollution in the agricultural soil of China, especially in developed regions such as the Yangtze River Delta (YRD) in eastern China, has received increasing attention. However, there are few studies on the long-term assessment of soil pollution by PTEs over large regions. Therefore, in this study, a meta-analysis was conducted to evaluate the current state and temporal trend of PTEs pollution in the agricultural land of the Yangtze River Delta. Based on a review of 118 studies published between 1993 and 2020, the average concentrations of Cd, Hg, As, Pb, Cr, Cu, Zn, and Ni were found to be 0.25 mg kg−1, 0.14 mg kg−1, 8.14 mg kg−1, 32.32 mg kg−1, 68.84 mg kg−1, 32.58 mg kg−1, 92.35 mg kg−1, and 29.30 mg kg−1, respectively. Among these elements, only Cd and Hg showed significant accumulation compared with their background values. The eastern Yangtze River Delta showed a relatively high ecological risk due to intensive industrial activities. The contents of Cd, Pb, and Zn in soil showed an increasing trend from 1993 to 2000 and then showed a decreasing trend. The results obtained from this study will provide guidance for the prevention and control of soil pollution in the Yangtze River Delta.

scholarly journals Dietary exposure to potentially toxic elements through sushi consumption in Catalonia, Spain

2021 ◽  
pp. 112285
Author(s):  
Neus González ◽  
Eudald Correig ◽  
Isa Marmelo ◽  
António Marques ◽  
Rasmus la Cour ◽  
...  
Keyword(s):  
Toxic Elements ◽  
Dietary Exposure ◽  
Potentially Toxic Elements
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