Removal of mercury from industrial effluents by adsorption and advanced oxidation processes: A comprehensive review

Ghosh, Soumya; Othmani, Amina; Malloum, Alhadji; Christ, Obileke Ke; Onyeaka, Helen; AlKafaas, Samar Sami; Nnaji, Nnabueze Darlington; Bornman, Charné; Al‐Sharify, Zainab T.; Ahmadi, Shabnam; Dehghani, Mohammad Hadi; Mubarak, Nabisab Mujawar; Tyagi, Inderjeet; Karri, Rama Rao; Koduru, Janardhan Reddy; Suhas, .

doi:10.1016/j.molliq.2022.120491

Cited by 41 publications

(5 citation statements)

References 205 publications

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“…The advantage of phytoremediation lies in the fact that it permanently removes Hg from the surroundings by storing it inside plant's biomass. In general, the plant species should be able to remove substantial quantities of HMs, without exerting any stress on their biomass [162]. Some plants, referred to as hyperaccumulators, are crucial components of the remediation process, which are comparatively better performers in reducing or removing pollutants [163].…”

Section: Phytoremediation Of Mercurymentioning

confidence: 99%

A Retrospection on Mercury Contamination, Bioaccumulation, and Toxicity in Diverse Environments: Current Insights and Future Prospects

Kumar,

Umesh,

Shanmugam

et al. 2023

Sustainability

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Owing to various industrial applications of mercury (Hg), its release into the environment at high concentration is becoming a great threat to living organisms on a global scale. Human exposure to Hg is greatly correlated with contamination in the food chain through cereal crops and sea foods. Since Hg is a non-essential component and does not possess a biological role and exhibits carcinogenic and genotoxic behaviour, biomonitoring with a focus on biomagnification of higher living animals and plants is the need of the hour. This review traces the plausible relationship between Hg concentration, chemical form, exposure, bioavailability, bioaccumulation, distribution, and ecotoxicology. The toxicity with molecular mechanisms, oxidative stress (OS), protein alteration, genomic change, and enzymatic disruptions are discussed. In addition, this review also elaborates advanced strategies for reducing Hg contamination such as algal and phytoremediation, biochar application, catalytical oxidation, and immobilization. Furthermore, there are challenges to overcome and future perspectives considering Hg concentrations, biomarkers, and identification through the nature of exposures are recommended.

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Section: Phytoremediation Of Mercurymentioning

confidence: 99%

A Retrospection on Mercury Contamination, Bioaccumulation, and Toxicity in Diverse Environments: Current Insights and Future Prospects

Kumar,

Umesh,

Shanmugam

et al. 2023

Sustainability

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“…Adsorption, catalytic oxidation, and advanced oxidation methods have been extensively studied to eliminate multistate Hg, − among which the adsorption method is considered as the best to immobilize Hg thus avoiding its further migration. For Hg 0 removal, various adsorbents including Zn-, Fe-, Co-, Cu-, and Mn-based metal sulfides, oxides, and selenides have been studied, and the abundant S- and Se-sites due to strong Hg-affinity can accommodate more mercury at a faster adsorption rate than carbon-based materials. ,− For Hg 2+ adsorption, the modified activated carbons, silicates, zeolites, natural minerals, metal–organic frameworks (MOFs), covalent-organic framework (COFs), and MXene-based materials ,, have been developed, and they achieved good Hg-uptake performance.…”

Section: Introductionmentioning

confidence: 99%

Multimedia Mercury Recovery from Coal-Fired Power Plants Utilizing N-Containing Conjugated Polymer Functionalized Fly Ash

Ma,

Qiu,

et al. 2024

Environ. Sci. Technol.

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To recover multimedia mercury from coal-fired power plants, a novel N-containing conjugated polymer (polyaniline and polypyrrole) functionalized fly ash was prepared, which could continuously adsorb 99.2% of gaseous Hg 0 at a high space velocity of 368,500 h −1 and nearly 100% of aqueous Hg 2+ in the solution pH range of 2−12. The adsorption capacities of Hg 0 and Hg 2+ reach 1.62 and 101.36 mg/g, respectively. Such a kind of adsorbent has good environmental applicability, i.e. good resistance to coexisting O 2 /NO/SO 2 and coexisting Na + /K + /Ca 2+ /Mg 2+ /SO 4 2−. This adsorbent has very low specific resistances (6 × 10 6 −5 × 10 9 Ω•cm) and thus can be easily collected by an electrostatic precipitator under low-voltage (0.1−0.8 kV). The Hg-saturated adsorbent can desorb almost 100% Hg under relatively low temperature (<250 °C). Characterization and theoretical calculations reveal that conjugated-N is the critical site for adsorbing both Hg 0 and Hg 2+ as well as activating chlorine. Gaseous Hg 0 is oxidized and adsorbed in the form of Hg X Cl X (ad), while aqueous Hg 2+ is adsorbed to form a complex with conjugated-N, and parts of Hg 2+ are reduced to Hg + by conjugated-N. This adsorbent can be easily large-scale manufactured; thus, this novel solid waste functionalization method is promising to be applied in coal-fired power plants and other Hg-involving industrial scenes.

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“…Numerous technologies have been developed to address the wastewater contaminated with organic contaminants, including electrochemical methods, precipitation, and coagulation-flocculation (Ibrahim, 2021) membrane filtering (Ahmed et al 2021), advanced oxidation (Ghosh et al 2022b; Mohammed et al 2021), ion exchange, photocatalytic degradation (Almhana et al 2022), and adsorptive removal ; Badran and Khalaf, 2020). Because of its high efficiency, cleanliness, resistance to harmful toxins, and ease of operation, adsorption has become one of the most favored methods for treating wastewater (Badran and Khalaf, 2020).…”

Section: Introductionmentioning

confidence: 99%

Decolorization of Cationic Dye from Aqueous Solution by Multiwalled Carbon Nanotubes

Ahmed,

Rasheed,

Rasheed

et al. 2024

J. Ecol. Eng.

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Methylene blue is a synthetic and cationic dye that finds utility in different fields including pharmaceutical, paper, textile, printing, carpet, and photography industries. Adsorption is a very effective technique to decolorize contaminated wastewater. This study aimed to determine the efficacy of Multiwalled Carbon Nanotubes (MWCNTs) as an adsorbent for decolorization of MB dye from aqueous solutions. The study examined various characteristics affecting adsorption, including concentration of dye, pH value, dosage of MWCNTs, and contact time. The results that growing the adsorbent dosage from (25 to 120) mg increased the dye efficiency rate from 62% to 98%, respectively, were shown. The study also evaluated pH, which is among the most critical factors influencing removal efficiency. The best pH for the removal efficiency was 6 at an initial concentration of MB dye 20 mgL -1 , a contact time 60 min, and an MWCNT dosage 100 mg. Langmuir, Freundlich, and Temkin isotherms were used to describe the adsorption equilibrium. The Langmuir isotherm with an R 2 value of 0.9968 and a maximum capacity for adsorption of 19.6 mgg -1 provided a suitable fit for the data of the experiment. In comparison between the suitability of kinetic models pseudo-first-order, pseudo-second order, and Weber-Morris, the kinetics model's correlation value was shown to be greater than that of the pseudo-second order kinetic model with an R 2 value of 0.9982.

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Removal of mercury from industrial effluents by adsorption and advanced oxidation processes: A comprehensive review

Cited by 41 publications

References 205 publications

A Retrospection on Mercury Contamination, Bioaccumulation, and Toxicity in Diverse Environments: Current Insights and Future Prospects

A Retrospection on Mercury Contamination, Bioaccumulation, and Toxicity in Diverse Environments: Current Insights and Future Prospects

Multimedia Mercury Recovery from Coal-Fired Power Plants Utilizing N-Containing Conjugated Polymer Functionalized Fly Ash

Decolorization of Cationic Dye from Aqueous Solution by Multiwalled Carbon Nanotubes

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