Assessing the Distribution and Concentration of Heavy Metals in Soils of an Agricultural Frontier in the Brazilian Cerrado

Brito, Ana C.; Boechat, Cácio Luiz; Sena, Antonny Francisco Sampaio de; Duarte, Lizandra de Sousa Luz; Nascimento, Clístenes Williams Araújo do; Silva, Yuri Jacques Agra Bezerra da; Silva, Ygor Jacques Agra Bezerra da; Saraiva, Paloma Cunha

doi:10.1007/s11270-020-04760-2

Cited by 15 publications

(6 citation statements)

References 46 publications

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“…However, this is the first study performed in Brazil which focused on estimating potential soil PTM contamination caused by cement plants' operation and their potential health risks to local human population. Some studies have already been published relating concerning events of soil contamination by PTM and the anthropic activity of cement production in some regions of the world, reporting events of PTM soil contamination more severe than those observed in this study (Table 2), which is probably related to the fact that these previous studies have been performed in countries whose laws about gas emissions as well as soil contamination by PTM are less restrictive than in Brazil [9,17,20,38,39]. On the other hand, when considering studies on PTM contamination events in general, China is the country where most of these studies have been reported, indicating that soils from areas of intense urban and industrial activity are severely contaminated by PTM, creating alarming risks to the environment and the health of local populations [6,[40][41][42][43].…”

Section: Discussionmentioning

confidence: 48%

“…Several studies reporting events of soil enrichment contamination by PTM in Brazilian territory have been published recently: Brito et al [38] also estimated PTM concentration in soils from areas under agricultural exploration and natural Cerrado vegetation, but in northeast region; Silva et al [37] verified and differentiated the sources of emission of PTMs in soils used for sugarcane cultivation in northeast region; Smidt et al [45] identified potential sources of pollution by PTMs in soils highly influenced by a phosphorus fertilizer factory. However, this is the first study performed in Brazil which focused on estimating potential soil PTM contamination caused by cement plants' operation and their potential health risks to local human population.…”

Section: Discussionmentioning

confidence: 99%

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Deposition of Potentially Toxic Metals in the Soil from Surrounding Cement Plants in a Karst Area of Southeastern Brazil

et al. 2021

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Cement factories are the main sources of environmental pollutants among the different industrial activities, including soil contamination by potentially toxic metals. The karst region of Southeastern Brazil is known for the implementation of large cement producing facilities. This study aims to evaluate whether there is an increase in the concentration of PTM in the soil surrounding the cement plants and to estimate their harmfulness to both local human population and environment. In total, 18 soil samples were collected from the surroundings of three cement plants as well as four soil samples from areas outside the influence of cement plants and concentration of the following potentially toxic metals (PTM) were estimated: Cd, Pb, Co, Cu, Cr, Mn, Ni, and Zn. The results revealed that all PTM concentrations from cement plant surroundings were significantly higher than PTM concentrations from control areas and no PTM concentrations from CPS or CA soil samples exceeded national and global contamination thresholds. However, Igeo Index indicated low level soil contamination by Pb, Cu, and Cr, as well as high levels for Co. We could not verify significant non-carcinogenic risk to health for any soil sample, but carcinogenic risk analysis revealed different levels of carcinogenic risk among the sampled locations, for both adults and children. Our results indicate that exclusively evaluating the concentration of potentially toxic metals is not enough to verify the potential harmful effects of cement production for the surrounding population. Here we evidence that additional indices, based on both contamination indices and health risk assessments, should be considered for better evaluation of the impacts of cement production activity.

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Section: Discussionmentioning

confidence: 48%

Section: Discussionmentioning

confidence: 99%

Deposition of Potentially Toxic Metals in the Soil from Surrounding Cement Plants in a Karst Area of Southeastern Brazil

et al. 2021

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“…Several studies report on the distribution of heavy metals and metalloids in soil [9,10,27,28]. Some soil properties facilitate the accumulation of these pollutants and increase their concentrations.…”

Section: Presence and Distribution Into The Environmentmentioning

confidence: 99%

Remediation of Metal/Metalloid-Polluted Soils: A Short Review

2021

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The contamination of soil by heavy metals and metalloids is a worldwide problem due to the accumulation of these compounds in the environment, endangering human health, plants, and animals. Heavy metals and metalloids are normally present in nature, but the rise of industrialization has led to concentrations higher than the admissible ones. They are non-biodegradable and toxic, even at very low concentrations. Residues accumulate in living beings and become dangerous every time they are assimilated and stored faster than they are metabolized. Thus, the potentially harmful effects are due to persistence in the environment, bioaccumulation in the organisms, and toxicity. The severity of the effect depends on the type of heavy metal or metalloid. Indeed, some heavy metals (e.g., Mn, Fe, Co, Ni) at very low concentrations are essential for living organisms, while others (e.g., Cd, Pb, and Hg) are nonessential and are toxic even in trace amounts. It is important to monitor the concentration of heavy metals and metalloids in the environment and adopt methods to remove them. For this purpose, various techniques have been developed over the years: physical remediation (e.g., washing, thermal desorption, solidification), chemical remediation (e.g., adsorption, catalysis, precipitation/solubilization, electrokinetic methods), biological remediation (e.g., biodegradation, phytoremediation, bioventing), and combined remediation (e.g., electrokinetic–microbial remediation; washing–microbial degradation). Some of these are well known and used on a large scale, while others are still at the research level. The main evaluation factors for the choice are contaminated site geology, contamination characteristics, cost, feasibility, and sustainability of the applied process, as well as the technology readiness level. This review aims to give a picture of the main techniques of heavy metal removal, also giving elements to assess their potential hazardousness due to their concentrations.

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“…Therefore, to mantain high yield and grain quality, a routine of soil fertilization and amendment for mitigation of the aluminum toxicity and low pH is crucial (Fageria et al, 2014). With the rise in environmental awareness over the risks of soil contamination due to the excess of mineral fertilizers (Brito et al, 2020;Hou et al, 2020), new sustainable nutrient sources, such as algae extracts, have been increasing in the market.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ascophyllum Nodosum and Soil Amendments on the Development of Maize Seedlings Cultivated Under Acid Oxisol

Trindade¹,

Mooney²,

Rodrigues

et al. 2023

Preprint

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Introduction Maize (Zea mays L.) plays a fundamental role in Brazilian agriculture, and it is mostly cultivated in Brazilian Savannah areas, under high Al content and acidic pH. Aims The aim of this work was to evaluate the effects of soil amendments and A. nodosum extract on the initial development of the root system and nitrogen use efficiency of maize under aluminum toxicity. Methods The effects of lime and gypsum in combination with seed treatment + foliar application of Ascophyllum nodosum on shoot and root growth, plant nutrition and photosynthesis of 14-day-old maize seedlings were tested in two experiments. The experimental design was randomized 4x2 factorial, with the following treatments: lime (L), gypsum (G), lime + gypsum (LG) and control (C), cultivated with and without seed treatment and foliar application of the Ascophyllum nodosum. Results The treatments with A. nodosum extract led to an increase in the root area in the treatments with lime, and to a smaller transport of aluminum to the shoot of the plants. The lime and gypsum treatments were efficient in minimizing the deleterious effects of aluminum toxicity, even with their short-term application in sandy clay loam medium textured soil, providing better photochemical activity, better use efficiency of nutrients, better rooting and, consequently, higher dry weight of shoot and root. Conclusions The results show that the use of A. nodosum and soil amendments in acidic soils lead to promising physiological and morphological improvement, and by consequence, may influence in crop production.

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Assessing the Distribution and Concentration of Heavy Metals in Soils of an Agricultural Frontier in the Brazilian Cerrado

Cited by 15 publications

References 46 publications

Deposition of Potentially Toxic Metals in the Soil from Surrounding Cement Plants in a Karst Area of Southeastern Brazil

Deposition of Potentially Toxic Metals in the Soil from Surrounding Cement Plants in a Karst Area of Southeastern Brazil

Remediation of Metal/Metalloid-Polluted Soils: A Short Review

Effects of Ascophyllum Nodosum and Soil Amendments on the Development of Maize Seedlings Cultivated Under Acid Oxisol

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