Combining geophysics and material science for environmental remediation: Real-time monitoring of Fe-biochar arsenic wastewater treatment

Siddiq, Mohammed; Tawabini, Bassam; Kirmizakis, Panagiotis; Kalderis, Dimitris; Ntarlagiannis, Dimitrios; Soupios, Pantelis

doi:10.1016/j.chemosphere.2021.131390

Cited by 15 publications

(5 citation statements)

References 31 publications

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“…A preliminary geophysical investigation was done by Siddiq et al [3] in order to correlate SIP parameters (real and imaginary conductivity) to the interactions (and therefore removal) of As(V) with biochar. Recent published work can provide detailed discussion on SIP and the used experimental set-up [3,51]. In brief, three laboratory columns of 240 mm length and 38 mm diameter, were prepared in accordance with previous work [51].…”

Section: Sip Monitoringmentioning

confidence: 99%

“…Protecting these limited sources from contamination is of prime concern to the water authorities. Arsenic (As) is a hazardous contaminant regulated and monitored by local water authorities [3]. It is considered a significant threat to human health and is listed by the World Health Organization (WHO) as a Class-I carcinogen with the threshold limit in drinking water set at 10 µg L −1 [4].…”

Section: Introductionmentioning

confidence: 99%

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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: Sip Monitoringmentioning

confidence: 99%

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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“…Wastewater, stormwater runoff, and various aquatic environments can offer ideal systems in which to utilize biochar for the removal of nutrients and contaminants [123][124][125], especially where biochars have been modified to carry out this task [41,123,126]. Biochars are frequently modified with the aim to increase positive charge on the biochar surface, through the addition of iron [127], magnesium [128], and cationic polymers [129]; through its incorporation into layered double hydroxides [130]; and by adding oxidants, acids, or alkalis [126,131]. In scenarios where biochar remediates excess nutrients from aqueous environments, the nutrient-loaded biochar can be reutilized as a fertilizing material in agriculture [123].…”

Section: Environmental Remediationmentioning

confidence: 99%

Soils and Beyond: Optimizing Sustainability Opportunities for Biochar

Gelardi

Parikh

2021

Sustainability

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Biochar is most commonly considered for its use as a soil amendment, where it has gained attention for its potential to improve agricultural production and soil health. Twenty years of near exponential growth in investigation has demonstrated that biochar does not consistently deliver these benefits, due to variables in biochar, soil, climate, and cropping systems. While biochar can provide agronomic improvements in marginal soils, it is less likely to do so in temperate climates and fertile soils. Here, biochar and its coproducts may be better utilized for contaminant remediation or the substitution of nonrenewable or mining-intensive materials. The carbon sequestration function of biochar, via conversion of biomass to stable forms of carbon, does not depend on its incorporation into soil. To aid in the sustainable production and use of biochar, we offer two conceptual decision trees, and ask: What do we currently know about biochar? What are the critical gaps in knowledge? How should the scientific community move forward? Thoughtful answers to these questions can push biochar research towards more critical, mechanistic investigations, and guide the public in the smart, efficient use of biochar which extracts maximized benefits for variable uses, and optimizes its potential to enhance agricultural and environmental sustainability.

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“…They differentiated the adsorption mechanisms between loess and Pb 2+ /Cd 2+ using SIP signals and correlated the decrease of the imaginary conductivity and reduced total polarizable surface charges with the shift of the characteristic frequency and calcite dissolution. Siddiq et al [ 29 ] studied the process of SIP detection in biochar-based As remediation. They deduced that the real and imaginary components will be affected by the amount of As adsorption caused by the interaction with surface functional groups.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Cu Adsorption and Migration with Spectral Induced Polarization in Activated Carbon

Bate

Cao

Yang

et al. 2023

Toxics

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In this paper, the adsorption process of copper ions on activated carbon (AC) was simulated in a column test. It was deduced that it is consistent with the pseudo-second-order model. Cation exchange was observed to be the major mechanism of Cu–AC interactions through scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM–EDS), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) measurements. Adsorption isotherms were fitted well using the Freundlich model. Adsorption thermodynamics at 298, 308, 318 K demonstrated that the adsorption process is spontaneous and endothermic. Spectral induced polarization (SIP) technique was used to monitor the adsorption process, and the double Cole–Cole model was used to analyze the SIP results. The normalized chargeability was proportional to the adsorbed copper content. Two measured relaxation times from the SIP testing were converted into the average pore sizes of 2, 0.8, 0.6, 100–110, 80–90, and 53–60 µm by the Schwartz equation, which are consistent with the measured pore sizes from both mercury intrusion porosimetry and scanning electron microscopy (SEM). The reduction in the pore sizes by SIP during the flow-through tests suggested that the adsorbed Cu2+ gradually migrated into small pores as with continued permeation of the influent. These results showcased the feasibility of using SIP technique in engineering practice involving the monitoring of copper contamination in land near a mine waste dump or in adjacent permeable reactive barriers.

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Combining geophysics and material science for environmental remediation: Real-time monitoring of Fe-biochar arsenic wastewater treatment

Cited by 15 publications

References 31 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

Soils and Beyond: Optimizing Sustainability Opportunities for Biochar

Investigation of Cu Adsorption and Migration with Spectral Induced Polarization in Activated Carbon

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