Exploring indigenous freshwater chlorophytes in integrated biophotovoltaic system for simultaneous wastewater treatment, heavy metal biosorption, CO2 biofixation and biodiesel generation

Ahiahonu, Elvis Kodzo; Anku, William Wilson; Roopnarain, Ashira; Green, Ezekiel; Serepa-Dlamini, Mahloro Hope; Govender, Penny Poomani

doi:10.1016/j.bioelechem.2022.108208

Cited by 11 publications

(6 citation statements)

References 66 publications

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“…An analysis of the works reviewed here, from ref. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] and [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51], 66.7% of the manuscripts are generated from Asia (India, Nepal, Pakistan, Saudi Arabia, Malaysia, China, Iran, Republic of Korea, and Taiwan), 18.5% from Africa (Egypt, Nigeria, and South Africa), 7.4% from South America (Peru) and 3.7% each from North America (Canada) and Europe (Portugal) (the classification is done in the basis of the institution in which the corresponding author is located).…”

Section: Discussionmentioning

confidence: 99%

“…The next reference [47] investigates the combined photosynthetic activities of two green microalgal species, Tetradesmus obliquus and Tetradesmus reginae, on an integrated biophotovoltaic (BPV) platform for simultaneous wastewater treatment, toxic metal biosorption, carbon biofixation, bioelectricity generation, and biodiesel production. The wastewater used in the experimentation is collected at the Daspoort Wastewater Treatment Plant (DWWTP) located at the Tshwane Metropolitan Municipality in Central Pretoria, South Africa.…”

Section: Biosorption Systems Without Mentioning the Metal Oxidation S...mentioning

confidence: 99%

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Arsenic and Biosorption

Robla¹

2023

Arsenic in the Environment - Sources, Impacts and Remedies

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Arsenic, either in (III) or (V) oxidation states forms, is a hazardous elements to humans, thus its removal from aqueous environments is of the utmost priority in the countries where this problem arises. From the various separation technologies, the removal f arsenic via biosorption processing attracted an interest, because besides the removal of the element, allows the recycle materials that in many cases are considered as wastes. The present chapter reviewed the most recent proposals (2022 year) about the use of biosorbents in the removal of this toxic element. Arsenic, either in (III) or (V) oxidation states forms, is a hazardous elements to humans, thus its removal from aqueous environments is of the utmost priority in the countries where this problem arises. From the various separation technologies, the removal f arsenic via biosorption processing attracted an interest, because besides the removal of the element, allows the recycle materials that in many cases are considered as wastes. The present chapter reviewed the most recent proposals (2022 year) about the use of biosorbents in the removal of this toxic element.

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Section: Discussionmentioning

confidence: 99%

Section: Biosorption Systems Without Mentioning the Metal Oxidation S...mentioning

confidence: 99%

Arsenic and Biosorption

Robla¹

2023

Arsenic in the Environment - Sources, Impacts and Remedies

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“…Moreover, we examined whether eCO 2 treatment could mitigate the detrimental effects of Sb on wheat growth (FW and DW) and physiology (Table 1). The stress mitigation impact of eCO 2 has been previously reported (Ahiahonu et al, 2022;Wang et al, 2023). Interestingly, eCO 2 has been suggested as an effective approach to mitigate heavy metals stress induced growth inhibition and oxidative stress (Dong et al, 2020;AbdElgawad et al, 2023;Wang et al, 2023).…”

Section: Elevated Co 2 Mitigates Growth Reduction By Reducing Sb Upta...mentioning

confidence: 90%

Elevated CO2 reduced antimony toxicity in wheat plants by improving photosynthesis, soil microbial content, minerals, and redox status

Khamis,

Reyad,

Alsherif

et al. 2023

Front. Plant Sci.

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IntroductionAntimony (Sb), a common rare heavy metal, is naturally present in soils at low concentrations. However, it is increasingly used in industrial applications, which in turn, leads to an increased release into the environment, exerting a detrimental impact on plant growth. Thus, it is important to study Sb effects on plants under the current and future CO2 (eCO2).MethodsTo this end, high Sb concentrations (1500 mg/kg soil) effects under ambient (420 ppm) and eCO2 (710 ppm) on wheat growth, physiology (photosynthesis reactions) and biochemistry (minerals contents, redox state), were studied and soil microbial were evaluated.Results and discussionOur results showed that Sb uptake significantly decreased wheat growth by 42%. This reduction could be explained by the inhibition in photosynthesis rate, Rubisco activity, and photosynthetic pigments (Cha and Chb), by 35%, 44%, and 51%, respectively. Sb significantly reduced total bacterial and fungal count and increased phenolic and organic acids levels in the soil to decrease Sb uptake. Moreover, it induced oxidative markers, as indicated by the increased levels of H2O2 and MDA (1.96 and 2.8-fold compared to the control condition, respectively). To reduce this damage, antioxidant capacity (TAC), CAT, POX, and SOD enzymes activity were increased by 1.61, 2.2, 2.87, and 1.86-fold, respectively. In contrast, eCO2 mitigated growth inhibition in Sb-treated wheat. eCO2 and Sb coapplication mitigated the Sb harmful effect on growth by reducing Sb uptake and improving photosynthesis and Rubisco enzyme activity by 0.58, 1.57, and 1.4-fold compared to the corresponding Sb treatments, respectively. To reduce Sb uptake and improve mineral availability for plants, a high accumulation of phenolics level and organic acids in the soil was observed. eCO2 reduces Sb-induced oxidative damage by improving redox status. In conclusion, our study has provided valuable insights into the physiological and biochemical bases underlie the Sb-stress mitigating of eCO2 conditions. Furthermore, this is important step to define strategies to prevent its adverse effects of Sb on plants in the future.

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“…Another study adopted a dual-chambered biphotovoltaic platform with a copper anode and cathode with Tetradesmus obliquus in growth media (BG11) and Tetradesmus reginae in wastewater. The two chambers were separated using a Nafion 117 membrane for dual production of bioelectricity and biodiesel while simultaneously removing heavy metals from the wastewater. , On the other hand, photosynthetic diatom microbial fuel cells (PDMFCs) were used for bioelectricity generation using live microalgae Nitzschia palea. Apart from bioelectricity, running PDMFCs also released oil that was transesterified to yield Diafuel along with carotenoid-rich biomass as value-added end products .…”

Section: Novel Routes For Integrated Production Of Bioenergy and Valu...mentioning

confidence: 99%

Microalgal-Based Bioenergy: Strategies, Prospects, and Sustainability

2022

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The fuel crisis with the slumping reserves of fossil fuels and the exponential increase in the demand of energy necessitate a paradigm shift to a more sustainable and eco-friendly energy system. Microalgal biofuel has been recognized as one of the most prominent and versatile alternative renewable energy sources because it can be converted into a wide array of biofuels, such as biodiesel, bioethanol, bioelectricity and biogases such as syngas, methane, hydrogen, and hythane etc., with a lower carbon emission profile. To attain the economic viability of algal fuels, a collective biorefinery approach addressing both the operational and technical limitations is quintessential. The current review critically analyzes and categorizes energy aspects of microalgae through various direct and indirect approaches with the perspective of a circular economy. These approaches include complicated thermochemical and biochemical processes integrating the recovery of a wide range of value-added products apart from biofuels, thus defining a cascading approach for a multiproduct-based biorefinery model. A glimpse of recent technological advancements comprising hybrid cultivation systems, prospects of co-culturing, and the role of automated/modeling approaches in the industrial-scale production of "algal-based bioenergy" is also discussed in detail. Further, the review has also scrutinized and highlighted the developments and bottlenecks in genetic and molecular aspects of strain improvement for bioenergy production. Furthermore, the study also correlated the socioeconomic and environmental impacts of producing this green energy by evaluating the prospects and pitfalls to obtain a holistic picture on this alternative fuel for a bio-based sustainable economy.

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Exploring indigenous freshwater chlorophytes in integrated biophotovoltaic system for simultaneous wastewater treatment, heavy metal biosorption, CO2 biofixation and biodiesel generation

Cited by 11 publications

References 66 publications

Arsenic and Biosorption

Arsenic and Biosorption

Elevated CO2 reduced antimony toxicity in wheat plants by improving photosynthesis, soil microbial content, minerals, and redox status

Microalgal-Based Bioenergy: Strategies, Prospects, and Sustainability

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