Environmental fate and ecotoxicology of paraquat: a California perspective

Sartori, Fábio; Vidrio, Edgar

doi:10.1080/02772248.2018.1460369

Cited by 34 publications

(18 citation statements)

References 126 publications

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“…However, pH level plays a vital role in heavy metal ion adsorption from an aqueous solution, and speciation and adsorption level influence the mobility of these metals [22]. e soil type can also influence adsorption of heavy metals; for instance, soil clay minerals have a greater influence on adsorption and inactivation compared with soil organic matter [23].…”

Section: Introductionmentioning

confidence: 99%

A Review of the Health Implications of Heavy Metals in Food Chain in Nigeria

Nkwunonwo

Odika

Onyia

2020

The Scientific World Journal

114

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Heavy metals such as Zn, Pb, Fe, and Cu are abundant in the environment and contribute largely to the sustainability and equilibrium of ecosystem processes. However, because of their bioaccumulation, nondegradability, and the excessive amounts in which they exist, these metals contaminate the food chain and subsequently become a source of toxicity to human beings and the entire ecological function. This is a major issue of concern within the study of environmental science and geochemistry. Although there is a global significance to the issue, it seems more immediate for the developing countries (DCs) such as Nigeria, where the pressure of the teeming population escalates the exigency for human sustainability, food security, and total eradication of hunger. Within the Nigerian context, many studies have examined this all-important issue, but most of these studies are fragmented and limited within the purview of mostly individual states and localities within the country. Taken on a wider geographical scale, the discussions and perspectives of these studies on heavy metal contamination of the food chain offer insufficient insight and expose merely a snapshot of the actual situation. As a result of this, a country-wide knowledge base of the implications of heavy metals on the food chain is lacking. Thus, the present study synthesises existing literature and their findings to create a knowledge base on the vulnerability of the food chain in Nigeria. Aquatic foods, fruits, vegetables, and major staple food such as tubers are the major host of carcinogenic and mutagenic components of heavy metals in Nigeria. This study motivates the Standard Organisation of Nigeria (SON), along with other food and agricultural agencies, to intensify their efforts in monitoring and analysing food components, and we advise consumers to eat with certain degrees of caveat.

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Section: Introductionmentioning

confidence: 99%

A Review of the Health Implications of Heavy Metals in Food Chain in Nigeria

Nkwunonwo

Odika

Onyia

2020

The Scientific World Journal

114

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“…Slight losses of Paraquat can result from photodecomposition and volatilization [24]. Paraquat soil half-life is 36 days -2.6 years [25,26,27]. Carbofuran has a half-life of 30-150 days [28] and degradation could be via chemical hydrolysis, photodegradation and microbial action [7].…”

Section: Introductionmentioning

confidence: 99%

Identification of Carbofuran and Paraquat Degrading Microorganisms from Soil

Ataikiru

Okerentugba

Okpokwasili

2020

SAJRM

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Introduction: Increased rates of pesticide misapplication and follow-on concerns on public health have become subjects of countless distress. The occurrence of pesticides in soils could result in modifications in soil physical, chemical as well as biological properties hence the need for ways to reduce such impacts. Research Gap: Insufficient literatures on extensive identification of pesticides’ degraders from non-impacted soils. Existing literatures are restricted to a particular microbial group (bacteria or fungi). Aim: The study aimed at isolating, characterizing and testing bacteria, moulds, yeasts and actinomyces from soil for the biodegradation of pesticides. Place and Duration of Study: The study was carried out at the Department of Environmental Management and Toxicology, Federal University of Petroleum Resources, Effurun and Federal Institute of Industrial Research, Oshodi, Lagos, Nigeria/ four months. Methodology: Carbofuran and Paraquat degrading microorganisms were isolated from a non-pesticides impacted soil using mineral salt medium (MSM). The MSM composed in grams per liter: K2HPO4, 4.8; KH2PO4, 1.2; NH4NO3, 1.0; MgSO4 7H2O, 0.2; Ca(NO3)2 .4H20, 0.4, and Fe(SO4)3, 0.001 supplemented with 2 mM Carbofuran or Paraquat as the only carbon source. The ability of the microbial isolates to utilize Carbofuran and Paraquat was screened on MSM containing 150 part per million of the pesticides as the only carbon source. The isolates were identified using the analytical profile index (API), microscopic and macroscopic characteristics. Results: Bacterial species identified were Bacillus, Pseudomonas, Kocuria, Enterobacter, Chryseobacterium, Corynebacterium, Acinetobacter, Paenibacillus, Lerclercia and Proteus. Actinomyces were Actinomyces isrealii, Actinomyces naeslundi, Actinomyces viscosus 1, Actinomyces meyeri and Actinomyces viscosus 2. Yeast isolates were Candida stellatoidea, Candida krusei and Saccharomyces cerevisiae while moulds were Talaromyces, Cladosporium carionii and Curvularia species. Conclusion: These findings indicated that Carbofuran and Paraquat degrading organisms are readily extant in soils and can be used to facilitate the removal of these pesticides from such polluted environments.

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“…The depollution of the water of rejection or destined for consumption, and load in paraquat which destroys in human beings many organs and in particular the lungs reveal themselves to be a real wager. It increases the probability to develop Parkinson's illness (Costello et al 2009;Sartori and Vidrio 2018). Therefore, it is necessary to design feasible processes to minimize the pollution caused by paraquat discharges and to reduce the risks associated with its presence in the environment.…”

Section: Introductionmentioning

confidence: 99%

Modeling adsorption mechanism of paraquat onto Ayous (Triplochiton scleroxylon) wood sawdust

Kamga

2018

Appl Water Sci

167

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The equilibrium sorption of a local Ayous (Triplochiton scleroxylon) wood sawdust was examined as substitute adsorbent for removal of paraquat from water. Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (DRK) isotherms were used to compare the equilibrium sorption data obtained. The separation factor revealed a constructive sorption experiment since the maximum monolayer coverage (Q 0 ) from Langmuir isotherm model was found out to be 41.66 µmol/g. In addition, the correlation value of Langmuir isotherm model was the maximum among the four adsorption isotherms. From Freundlich isotherm model, the sorption intensity (n) that denotes favorable sorption and the correlation value are 2.402 and 0.929, respectively. Temkin isotherm model was used to calculate the heat of sorption process which corresponds to 18.39 J/mol, and the mean free energy was estimated from DRK isotherm model to be 0.091 kJ/mol which vividly proved that the adsorption experiment was obeyed to a physical process. The results indicate that this local wood sawdust could be employed as an economical material for reducing paraquat from industrial wastewater.

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Environmental fate and ecotoxicology of paraquat: a California perspective

Cited by 34 publications

References 126 publications

A Review of the Health Implications of Heavy Metals in Food Chain in Nigeria

A Review of the Health Implications of Heavy Metals in Food Chain in Nigeria

Identification of Carbofuran and Paraquat Degrading Microorganisms from Soil

Modeling adsorption mechanism of paraquat onto Ayous (Triplochiton scleroxylon) wood sawdust

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