Accumulation and risk assessment of metals in palm oil cultivated on contaminated oil palm plantation soils

Olafisoye, Oladunni B; Fatoki, Olalekan S; Oguntibeju, Oluwafemi Omoniyi; Osibote, Otolorin Adelaja

doi:10.1016/j.toxrep.2020.01.016

Cited by 26 publications

(22 citation statements)

References 40 publications

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“…Environmental contamination by toxic metals is a food safety risk and a global problem for human health [ 1 ]. Mining and metallurgical activity, irrigation of crops with wastewater, leaching from landfills, application of organic and inorganic fertilizers, and mining wastes have contributed to the accumulation of toxic metals in soils [ [2] , [3] , [4] , [5] , [6] ]. As a result of these anthropogenic activities, heavy metals are released into the atmosphere, water and soil, threatening natural ecosystems and the exposed population [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Heavy metals in soils and edible tissues of Lepidium meyenii (maca) and health risk assessment in areas influenced by mining activity in the Central region of Peru

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Heavy metals in soils and edible tissues of Lepidium meyenii (maca) and health risk assessment in areas influenced by mining activity in the Central region of Peru

et al. 2021

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“…5). This can increase available Ni that can be absorbed by the plant roots and enter the food chain (Olafisoye et al, 2020;Sreekanth et al, 2013;Zhang et al, 2015). The watersoluble Ni in soil solution (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Despite its status as an essential nutrient for the growth and development of several higher plants (Siqueira Freitas et al, 2018), elevated Ni concentration in soil adversely affects plants (Jiang et al, 2019), animals, and humans (Das et al, 2019;Genchi et al, 2020). Accumulation of Ni in plant tissue is detrimental to agricultural product quality, leading to the disruption of chemical and biological activities in the human body (Olafisoye et al, 2020;Sreekanth et al, 2013). Tropical peat has high acidity (Abat et al, 2012;Sangok et al, 2020) and low nutrient status (Watanabe et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Distribution of nickel (Ni) in peatland situated alongside mineral soil derived from ultrabasic rocks

Pulunggono

Zulfajrin

Irsan

2021

Sains Tanah J. Soil Sci. Agroclimatology

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<p>Detailed studies of Ni distribution in peat that is influenced by Ni-rich soil derived from ultrabasic rocks are still limited. The objective of this study was to reveal the characteristics of Ni in peat from Morowali (Central Sulawesi Province, Indonesia) at several depths and distances from the boundary of the ultrabasic mineral soil. Peat was sampled from depths of 0–30, 30–60, and 60–90 cm at distances of 100, 200, 300, 400, 500, and 600 m from the border of the ultrabasic mineral soil in March 2018. Ni characteristics were examined through their total, exchangeable, water-soluble, and adsorbed distributions. The relationships between Ni and some peat chemical properties such as pH; cation exchange capacity; macronutrient contents of K, Ca, and Mg; and micronutrient contents of Fe, Cu and Zn were also observed. The high Ni content in peat at the study transect is caused by an accumulation of Ni transported from elevated areas of mineral soil. Most Ni in peat is bonded to the soil organic exchange complexes. Accumulation of the mineral soil fraction in the peat surface is indicated at distances of 100–400 meters from the ultrabasic mineral soil. Ni distribution in peat at the study transect is mainly governed by a combination of Fe, pH, organic material, water content, peat depth, and distance from ultrabasic mineral soil.</p>

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“…The results from the analysis of the energy-dispersive X-ray fluorescence spectrometer (EDX) as shown in Table 3 indicated that FAME, used as the raw material of this research, had only Zn species (36 ppm), possibly due to the contaminant or nutrient in the palm oil feedstock used for FAME production [30,31]. After the partial hydrogenation, H-FAME obtained from the 30 wt% Ni/SF catalyst contained Ni particles The results from the analysis of the energy-dispersive X-ray fluorescence spectrometer (EDX) as shown in Table 3 indicated that FAME, used as the raw material of this research, had only Zn species (36 ppm), possibly due to the contaminant or nutrient in the palm oil feedstock used for FAME production [30,31]. After the partial hydrogenation, H-FAME obtained from the 30 wt% Ni/SF catalyst contained Ni particles of 93.9 ppm, whereas H-FAME obtained from the 30 wt% Ni/SB catalysts had no Ni species.…”

Section: Catalyst Stability Of Ni/sf and Ni/sb Catalystsmentioning

confidence: 96%

Partial Hydrogenation of Palm Oil-Derived Biodiesel over Ni/Electrospun Silica Fiber Catalysts

et al. 2020

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Given the high accessibility of reactants to the active metal sites of fibrous catalysts, in this research, an electrospun silica fiber was applied as a support of nickel catalysts (Ni/SF) for the partial hydrogenation of palm oil fatty acid methyl ester (FAME) in a fixed-bed reactor. The textural properties, reducibility, Ni dispersion and morphology of Ni/SF catalysts were characterized and compared to those of a Ni/porous silica ball (Ni/SB). Under 1 bar H2 pressure at 140 °C, the 30 wt% Ni/SF catalyst exhibited a high turnover frequency (TOF) of 1396 h−1 to convert methyl linoleate (C18:2) to more saturated structures. On the other hand, the system using Ni/SB catalysts showed a TOF of only 141 h−1. This result was due to the effect of the higher acidity of the silica fiber, which promoted the higher adsorption of polyunsaturated portions in FAME. The non-porous characteristics and open morphology of the Ni/SF catalysts also allowed FAME and H2 molecules to easily access the Ni active sites deposited on the surface of the silica fiber and suppressed the selectivity to cis–trans isomerization. Stability testing of the Ni/SF catalyst showed that the C18:2 conversion decreased from 71% to 60% after long-term operation for 16 h possibly due to the weak metal–support interaction that facilitated Ni particle loss from the catalyst surface.

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Accumulation and risk assessment of metals in palm oil cultivated on contaminated oil palm plantation soils

Cited by 26 publications

References 40 publications

Heavy metals in soils and edible tissues of Lepidium meyenii (maca) and health risk assessment in areas influenced by mining activity in the Central region of Peru

Heavy metals in soils and edible tissues of Lepidium meyenii (maca) and health risk assessment in areas influenced by mining activity in the Central region of Peru

Distribution of nickel (Ni) in peatland situated alongside mineral soil derived from ultrabasic rocks

Partial Hydrogenation of Palm Oil-Derived Biodiesel over Ni/Electrospun Silica Fiber Catalysts

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