Arsenic speciation and biotransformation pathways in the aquatic ecosystem: The significance of algae

Hussain, Muhammad Mahroz; Wang, Jianxu; Bibi, Irshad; Shahid, Muhammad; Niazi, Nabeel Khan; Iqbal, Jibran; Mian, Ishaq Ahmad; Shaheen, Sabry M.; Bashir, Safdar; Shah, Noor S.; Hina, Kiran; Rinklebe, Jörg

doi:10.1016/j.jhazmat.2020.124027

Cited by 140 publications

(33 citation statements)

References 132 publications

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“…Some elements, such as Ni, Cu, Cr, and Zn, are essential metabolic components at trace concentrations but cause systemic toxicity above permissible thresholds [61,136]. Other elements (e.g., Pb, Hg, and As) are toxic to aquatic organisms, even at trace levels [137].…”

Section: Toxicity Of Selected Heavy-metal Pollutants To Macroinverteb...mentioning

confidence: 99%

“…Due to the high bonding affinity with other natural elements, As naturally occurs as a major ingredient in over 200 mineral ores, mainly as elemental As, arsenide, arsenate, phosphate, sulphide, arsenite, and oxide mineral forms released biogeochemically during oxidation, reactive desorption, or chemical and bioleaching processes [137,138]. As is also introduced anthropogenically via agrochemical processing byproducts and mining effluent discharges into natural water systems [139,140].…”

Section: Arsenic (As)mentioning

confidence: 99%

“…In the aquatic matrix, the As toxicity varies with the water chemistry (e.g., pH and redox potential), presence of oxides (e.g., Fe and Mn) [142], and microbial activities (e.g., algal biosorption) [137]. As exists mainly in four oxidation and pH-dependent states as arsenite (As(III)), arsenate (As(V)), and arsenic (As(0)) and arsine (As(-III)) [143].…”

Section: Arsenic (As)mentioning

confidence: 99%

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Aquatic Ecological Risk of Heavy-Metal Pollution Associated with Degraded Mining Landscapes of the Southern Africa River Basins: A Review

2022

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Africa accounts for nearly 30% of the discovered world’s mineral reserves, with half of the world’s platinum group metals deposits, 36% of gold, and 20% of cobalt being in Southern Africa (SA). The intensification of heavy-metal production in the SA region has exacerbated negative human and environmental health impacts. In recent years, mining waste generated from industrial and artisanal mining has significantly affected the ecological integrity of SA aquatic ecosystems due to the accelerated introduction and deposition of heavy metals. However, the extent to which heavy-metal pollution associated with mining has impacted the aquatic ecosystems has not been adequately documented, particularly during bioassessments. This review explores the current aquatic ecological impacts on the heavily mined river basins of SA. It also discusses the approaches to assessing the ecological risks, inherent challenges, and potential for developing an integrated ecological risk assessment protocol for aquatic systems in the region. Progress has been made in developing rapid bioassessment schemes (RBS) for SA aquatic ecosystems. Nevertheless, method integration, which also involves heavy-metal pollution monitoring and molecular technology, is necessary to overcome the current challenges of the standardisation of RBS protocols. Citizenry science will also encourage community and stakeholder involvement in sustainable environmental management in SA.

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Section: Toxicity Of Selected Heavy-metal Pollutants To Macroinverteb...mentioning

confidence: 99%

Section: Arsenic (As)mentioning

confidence: 99%

Section: Arsenic (As)mentioning

confidence: 99%

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Aquatic Ecological Risk of Heavy-Metal Pollution Associated with Degraded Mining Landscapes of the Southern Africa River Basins: A Review

2022

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“…In recent years, graphene has attracted considerable attention [31], and it has been employed in numerous applications, ranging from energy storage [32], sensors [33] and electro-Fenton [9] to microwave absorbers [34]. It is also finding applications as an adsorbent material for environmental applications and it is a very welcomed emerging material in this sector as the quality of water continues to decline with increasing amounts of pollutants escaping into the aquatic environment [35][36][37].…”

Section: Graphene As An Adsorbent Materialsmentioning

confidence: 99%

Graphene-Based Materials Immobilized within Chitosan: Applications as Adsorbents for the Removal of Aquatic Pollutants

et al. 2021

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Graphene and its derivatives, especially graphene oxide (GO), are attracting considerable interest in the fabrication of new adsorbents that have the potential to remove various pollutants that have escaped into the aquatic environment. Herein, the development of GO/chitosan (GO/CS) composites as adsorbent materials is described and reviewed. This combination is interesting as the addition of graphene to chitosan enhances its mechanical properties, while the chitosan hydrogel serves as an immobilization matrix for graphene. Following a brief description of both graphene and chitosan as independent adsorbent materials, the emerging GO/CS composites are introduced. The additional materials that have been added to the GO/CS composites, including magnetic iron oxides, chelating agents, cyclodextrins, additional adsorbents and polymeric blends, are then described and discussed. The performance of these materials in the removal of heavy metal ions, dyes and other organic molecules are discussed followed by the introduction of strategies employed in the regeneration of the GO/CS adsorbents. It is clear that, while some challenges exist, including cost, regeneration and selectivity in the adsorption process, the GO/CS composites are emerging as promising adsorbent materials.

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“…Contaminated agricultural soils with toxic metals occur mainly through human activities such as mining, waste disposal, irrigation with wastewater, and application of inorganic and organic fertilizers to agricultural land (Xiao et al 2019). Previous studies have discovered that crops cultivated in soils polluted with toxic metal(loid)s, e.g., cadmium (Cd), lead (Pb), and arsenic (As), could uptake high concentration of metal(loid)s by roots and accumulate them in their tissues (Gan et al 2017;Hussain et al 2021;Li et al 2020;Natasha et al 2021;Wen et al 2021). Both Cd and Pb are extremely harmful toxic metals with high mobility in soil-plant environmental system (Jing et al 2019;Qin et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Biochar and soil properties limit the phytoavailability of lead and cadmium by Brassica chinensis L. in contaminated soils

Houssou

Jeyakumar

Niazi

et al. 2022

Biochar

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The current study investigated the effect of biochars derived from cinnamomum woodchip, garden waste and mulberry woodchip on soil phytoavailable lead (Pb), cadmium (Cd) pools, and their uptake by Chinese cabbage (Brassica chinensis L.). The biochars were produced at 450 °C of pyrolysis temperature. The contaminated soils were collected from Yunfu (classified as Udept), Jiyuan (Ustalf) and Shaoguan (Udult) cities in China at the depth of 0–20 cm and amended with biochars at the rate of 3% w/w. After mixing the soil with biochar for 14 days, the Chinese cabbage was planted in the amended soils. Then, it was harvested on the 48th day after sowing period. In Udult soil, Chinese cabbage died 18 days after sowing period in control and soils amended with cinnamomum and mulberry biochars. Although only plants grown with the garden waste biochar treatment survived in Udult soil, amendment of garden waste or mulberry biochars at 3% w/w (450 °C) to Udult soil significantly increased (4.95–6.25) soil pH compared to other biochar treatments. In Udept and Ustalf soils, the application of garden waste and mulberry biochars significantly improved plant biomass compared to control, albeit it was dependent on both biochar and soil properties. Garden waste biochar significantly decreased soil Cd phytoavailable concentration by 26% in the Udult soil, while a decrease of soil Cd phytoavailable concentration by 16% and 9% was observed in Ustalf and Udept soils, respectively. The available phosphorus in biochar and soil pH were important factors controlling toxic metal phytouptake by the plant. Thus, the amendment of soil with biochar at 3% can effectively reduce the mobility of Cd and Pb in soil and plant uptake. However, biochar and soil properties should be well-known before being used for soil toxic metal immobilization.

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Arsenic speciation and biotransformation pathways in the aquatic ecosystem: The significance of algae

Cited by 140 publications

References 132 publications

Aquatic Ecological Risk of Heavy-Metal Pollution Associated with Degraded Mining Landscapes of the Southern Africa River Basins: A Review

Aquatic Ecological Risk of Heavy-Metal Pollution Associated with Degraded Mining Landscapes of the Southern Africa River Basins: A Review

Graphene-Based Materials Immobilized within Chitosan: Applications as Adsorbents for the Removal of Aquatic Pollutants

Biochar and soil properties limit the phytoavailability of lead and cadmium by Brassica chinensis L. in contaminated soils

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