Heavy metals concentration in soils under rainfed agro-ecosystems and their relationship with soil properties and management practices

Srinivasarao, Ch.; Gayatri, S. Rama; Venkateswarlu, B.; Jakkula, Vijay S.; Wani, S P; Kundu, Sumanta; Sahrawat, K. L.; Rao, B. K. Rajasekhara; Marimuthu, S.; Krishna, G. Vamsi

doi:10.1007/s13762-013-0350-9

Cited by 43 publications

(20 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous research identified significant positive correlations of TOC with metals (Gao & Chen, ; Dou et al ., ). Organic carbon is one of the main sources of nutrients in the topsoil; thus, it was expected that these correlations would be positive (Srinivasarao et al ., ; Gellaw et al ., ), confirming the affinity of the studied extractable metals for organic compounds (Esmaeili et al ., ). In relation to pH, our results were different from several studies, where a negative relationship between exchangeable heavy metals and pH is normally reported (Pereira et al ., ; Perez‐Esteban et al ., ; Czarnecki & Düring, ; Wu et al ., ).…”

Section: Resultsmentioning

confidence: 99%

“…In our work, the concentration of heavy metals was lower than the thresholds recommended by the European Union with the exception of Cd, which had some sampling points with a value higher than 3 (Table ). Nevertheless, the values observed are much lower than those observed in some other agricultural (Wu et al ., ; Farrag et al ., ; Esmaeili et al ., ; Srinivasarao et al ., ) and industrial (Krishna & Govil, ; Massas et al ., 13) areas. Reforestation of the agricultural area, the low clay content of the soils, and the closing of the TV factory may have contributed to these low values.…”

Section: Resultsmentioning

confidence: 99%

“…Clay-rich soils have a high capacity to retain heavy metals compared to sandy soils because they have a high cation exchange capacity comparing to soils with coarser textures (Chang et al, 2014). Specific soil surface is an important variable controlling the retention of heavy metals (Srinivasarao et al, 2014a). The studied soils are classified as silty loam, low in clay, and this may have contributed to the poor adsorption of heavy metals,…”

Section: Correlation Analysismentioning

confidence: 99%

See 2 more Smart Citations

The Influence of Organic Carbon and pH on Heavy Metals, Potassium, and Magnesium Levels in Lithuanian Podzols

et al. 2016

View full text Add to dashboard Cite

Industrial activities can contribute to the accumulation of heavy metals in soils, which could potentially threaten public health and the environment. This research was conducted to investigate the relationships between pH and total organic carbon (TOC) with soil chemical parameters, including exchangeable and total Cu, Zn, Cd, Pb, K, and Mg concentrations in soils near Panevėžys and Kaunas, Lithuania. Principal component regression (PCR) and non‐linear regression were used to find statistical relationships between pH, TOC, and the other soil properties studied. The results of correlation tests indicated that pH and TOC had strong relationships with most of the soil properties. The results of PCR [R2 = 0·87, RMSE = 0·046] and non‐linear regression [R2 = 0·91, RMSE = 0·041] (pH and the entire parameters), PCR [R2 = 0·777, RMSE = 0·058] and non‐linear regression [R2 = 0·871, RMSE = 0·046] (pH and the exchangeable parameters) to model the relationships between pH and soil chemical properties were promising and significant. Exchangeable heavy metal concentrations increased for pH > 5. Even though the relationships between TOC and heavy metals were significant, they were not as powerful as the relationships between pH and these metals. It was concluded that total metal concentrations in the study soils can be predicted by either pH or TOC. Metal mobility could most likely be controlled at the study site by manipulating soil pH and/or TOC. Finally, it is suggested that when there are financial and time limitations, assessment of total exchangeable metal concentrations using soil pH and/or TOC could be productive. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Correlation Analysismentioning

confidence: 99%

See 1 more Smart Citation

The Influence of Organic Carbon and pH on Heavy Metals, Potassium, and Magnesium Levels in Lithuanian Podzols

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Composite addition to the soil increased the adsorption sites that resulted in more amount of metals in the solid phase leading to a higher adsorption intensity than that of the untreated soil. Among the metals studied, Cu maintained a higher adsorption intensity due to higher affinity for adsorption sites than that of Zn, Cd and Ni in the treated and untreated soils (Shaheen et al 2013;Srinivasarao et al 2014;Shaheen et al 2015a &b;Kang et al 2016). Desorption rate can be used to characterize the degree of metal binding to the adsorbent.…”

Section: Distribution Coefficientsmentioning

confidence: 96%

Chitosan-g-poly(acrylic acid)-bentonite composite: a potential immobilizing agent of heavy metals in soil

et al. 2018

View full text Add to dashboard Cite

Aiming to achieve heavy metal adsorption in water and soil environments, a montmorillonite rich bentonite was graft-copolymerized with chitosan, and the obtained composite material was evaluated as a metal immobilizing agent for remediating metal contaminated soil. The graft-copolymerization reaction in the composite was confirmed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) techniques. Batch adsorption studies with varying experimental conditions, such as adsorbent amount, pH and metal concentration, were conducted to assess the metal adsorption capacity of the composite. The adsorption pattern followed the Langmuir isotherm model, and maximum monolayer capacity was 88.5, 72.9, 51.5 and 48.5 mg g-1 for Cu, Zn, Cd and Ni, respectively. Amendment of a contaminated soil with the composite enhanced the metal retention capacity by 3.4, 3.2, 4.9 and 5.6-fold for Cu, Zn, Cd and Ni, respectively, over unamended soil. The desorption percentage of metals from the composite treated soil was significantly lower than the unamended contaminated soil. The findings indicated that immobilization of heavy metals in soils could be achieved by the chitosan-bentonite, which would potentially be an inexpensive and sustainable environmental remediation technology.

show abstract

“…The typically dark colour of vertisols results from clay-organic complexes, whilst Fe-titanium (Ti)-Mn oxides also contribute to the pigmentation [27]. Most vertisols are inherently fertile and studies in India [28,29] and elsewhere [30] have demonstrated that the high clay content exerts dominant control over essential pools of Fe, Mn, Zn, Cu, Co and Ni and their [29,31], whereas soil pH (c. 7-8) and higher CaCO 3 contents result in lower concentrations of Fe, Mn and Zn [30,31]. In view of the high smectite content of the vertisols, it is surprising that the study area is among the most metaldeficient regions in Central India, indicating that only a small fraction of metals is bioavailable [31].…”

Section: Chemical and Mineralogical Characteristics Of Vertisols And mentioning

confidence: 99%

The role of pedogenesis and natural fertiliser as vectors for essential metal content in agricultural topsoils, Central India

2021

View full text Add to dashboard Cite

Essential trace metals are well known for their environmental toxicity and for being part of complex bio-chemical cycles. Their role as critical micronutrients, delivering vital health benefits, is less widely discussed and understood, holding back strategies for combatting malnutrition. Crops grown on many Indian soils suffer from deficiencies in essential metals, notably iron (Fe), zinc (Zn), and molybdenum (Mo). The list of deficient metals will likely grow due to increasing future crop demand. Geostatistical analysis of soils and farmyard manure (FYM), the predominant fertiliser, implies that residual oxide minerals carry high concentrations of the essential trace metals Fe, Zn, copper (Cu), chromium (Cr), nickel (Ni), cobalt (Co), manganese (Mn) not only in soil but also in FYM (especially Fe, Cr, Cu, Co and Ni). A geochemical survey across a road traverse of 600 km, encompassing an area of c. 15,000 km2, was conducted in Central India to evaluate reported essential metal deficiency in key agricultural topsoils. Importantly, our evaluation of the element cycling in this system reveals that despite high bulk concentrations, some key metals remain bio-unavailable. In effect, the existence of refractory (weathering-resistant) oxides is likely a significant factor for deficiency symptoms in the soil–plant-fertiliser cycle. Further, mass balance calculations of the bioavailable pool of metals imply that only Fe and Mn are present in sufficient quantities to combat deficiency problems. Notwithstanding this limitation of FYM, its high organic carbon content, as well as its importance for Zn, Cu and Fe, validates its traditional use to maintain the fertility and physical condition of Indian topsoils.

show abstract

Heavy metals concentration in soils under rainfed agro-ecosystems and their relationship with soil properties and management practices

Cited by 43 publications

References 38 publications

The Influence of Organic Carbon and pH on Heavy Metals, Potassium, and Magnesium Levels in Lithuanian Podzols

The Influence of Organic Carbon and pH on Heavy Metals, Potassium, and Magnesium Levels in Lithuanian Podzols

Chitosan-g-poly(acrylic acid)-bentonite composite: a potential immobilizing agent of heavy metals in soil

The role of pedogenesis and natural fertiliser as vectors for essential metal content in agricultural topsoils, Central India

Contact Info

Product

Resources

About