Removal of arsenic from contaminated groundwater using biochar: a technical review

Siddiq, Omer Muhammad; Tawabini, Bassam; Soupios, Pantelis; Ntarlagiannis, Dimitrios

doi:10.1007/s13762-020-03116-x

Cited by 29 publications

(17 citation statements)

References 107 publications

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“…The mechanisms involved in As adsorption by porous materials have been thoroughly 2 of 16 reviewed and established [15,17,18]. Conventional adsorbents such as carbonaceous materials and fly ash, have exhibited a positive adsorption behaviour, but this is towards As(V) rather than As(III), which is highly toxic and mobile compared to As(V) [19,20].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Arsenic on Fe-Modified Biochar and Monitoring Using Spectral Induced Polarization

Kirmizakis

Tawabini

Siddiq

et al. 2022

Water

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This work demonstrates the potential of Fe-modified biochar for the treatment of arsenic (As) simulated wastewater and the monitoring of adsorption in real-time. Specifically, we propose the utilization of date-palm leaves for the production of biochar, further modified with Fe in order to improve its adsorption function against inorganic pollutants, such as As. Both the original biochar and the Fe-modified biochar were used for adsorption of As in laboratory batch and column experiments. The monitoring of the biochar(s) performance and As treatment was also enhanced by using the spectral induced polarization (SIP) method, offering real-time monitoring, in addition to standard chemical monitoring. Both the original and the Fe-modified biochar achieved high removal rates with Fe-modified biochar achieving up to 98% removal of As compared to the 17% by sand only (control). In addition, a correlation was found between post-adsorption measurements and SIP measurements.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Arsenic on Fe-Modified Biochar and Monitoring Using Spectral Induced Polarization

Kirmizakis

Tawabini

Siddiq

et al. 2022

Water

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“…6 a). The results are present that the high removal efficiency of arsenic metals was generally achieved at acidic pH (3)(4)(5).…”

Section: Solution Ph and Proposed Mechanismmentioning

confidence: 92%

“…Arsenic species in the environment has two forms organic form (monoethyl arsenate and dimethyl arsenate) and inorganic form (arsenite and arsenate), which is the main form of arsenic in the environment is inorganic arsenate (As V) and arsenite (As III) [1,2].. The other source of arsenic in soil/water is due to the unprecedented increase in industry-related activities and agricultural demand such as mining, swine feed additives, pesticides, herbicides, wood treatment agents, electronic manufacturing, pharmaceuticals, dyes, cosmetics, and coal combustion [3][4][5].. Considering the wide distribution of arsenic species and their cancerous and non-cancerous impacts, it is urgent to control and monitor the concentration of arsenic species in the environment for the sake of public health.…”

Section: Introductionmentioning

confidence: 99%

Arsenic Remove from Apatite-Soil Treated Waters’ Using Magnetic Zero Valent Iron Doped Polyethersolfun Beads

Noorbakhsh

Koohi

Hasan

et al. 2022

Preprint

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The drop immerses calcium chloride aqueous solution was utilized to prepare the zero valent iron-doped polyethersulfone beads (PES/ZVI) for efficient removal of arsenic from apatite-soil treated waters’. The proposed beads can assist in promoting uptake efficiency by hindering ZIV agglomeration due to high porosity and different active sites. The PES/ZVI beads were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and vibrating sample magnetism (VSM). The objective of this manuscript was to develop new PES/ZVI beads with increased removal efficiency for the removal of arsenic ions from the apatite-soil treated waters’. Maximum arsenic removal of 82.39% was achieved when applied at an 80 mg dose for a contact time of 180 min and 90% after 300 min shaking time. The experimental process was fitted with the Langmuir model due to the high R2 (0.99) value compared to the Freundlich model (0.91) with an adsorption capacity of 41.32 mg.g− 1. The adsorption rate was limited by pseudo-second-order (R2 = 0.999) and the adsorption mechanism nature is endothermic and physical. Hence, isotherm, kinetic and thermodynamic studies revealed the feasibility of sorption and removal of arsenic through the physisorption process.

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“…Comprehensive reviews on the removal of arsenic from aqueous solution by biochar are already available [28–34] . However, none of the previous reviews has focused on metal‐loaded biochars and the specific removal mechanisms.…”

Section: Introductionmentioning

confidence: 99%

“…Comprehensive reviews on the removal of arsenic from aqueous solution by biochar are already available. [28][29][30][31][32][33][34] However, none of the previous reviews has focused on metalloaded biochars and the specific removal mechanisms. Given their significance, the current review centers on the applications of metal-loaded biochars in arsenic removal with special…”

Section: Introductionmentioning

confidence: 99%

Metal‐Loaded Biochar for the Removal of Arsenic from Water: A Critical Review on Overall Effectiveness, Governing Mechanisms, and Influential Factors

et al. 2022

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Arsenic (As) contamination in water sources is a serious threat to safe drinking water afflicting many developed and developing nations. Among the different water treatment techniques, arsenic removal using metal‐loaded biochar has gained considerable interest as an efficient environmentally sustainable adsorbent. This review critically focuses on an in‐depth analysis of different adsorption mechanisms and various physicochemical properties such as pH, surface area and surface charge, porosity, and functional groups of the metal‐loaded biochar that are significant for As adsorption, which has not been previously described. It centers on addressing the overall effectiveness, governing mechanisms, and influential factors of metal‐loaded biochars for As removal from the aqueous medium. Special consideration on oxidation of arsenite to arsente and its removal was given. The oxidation processes are also effective in reducing arsenic toxicity by oxidation of arsenite to arsenate. A comprehensive insight into the utility of biochar for As removal for future field applications of biochar is delineated.

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Removal of arsenic from contaminated groundwater using biochar: a technical review

Cited by 29 publications

References 107 publications

Adsorption of Arsenic on Fe-Modified Biochar and Monitoring Using Spectral Induced Polarization

Adsorption of Arsenic on Fe-Modified Biochar and Monitoring Using Spectral Induced Polarization

Arsenic Remove from Apatite-Soil Treated Waters’ Using Magnetic Zero Valent Iron Doped Polyethersolfun Beads

Metal‐Loaded Biochar for the Removal of Arsenic from Water: A Critical Review on Overall Effectiveness, Governing Mechanisms, and Influential Factors

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