Remediation of Emerging Contaminants by Naturally Derived Adsorbents

Nayyar, Darakhshan; Shaikh, M.A.; Nawaz, Tabish

doi:10.1007/978-981-16-8367-1_11

Cited by 3 publications

(3 citation statements)

References 102 publications

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“…PPCPs and other emerging organic pollutants are adsorbed onto modified and non-modified biochar via chemical and physical adsorption (Nayyar et al 2022;Zhang et al 2022a). Chemisorption interaction occurs via electrostatic interactions and ion exchange, while physisorption occurs via pore-filling, π-π interaction, and other weak interaction mechanisms (Keerthanan et al 2020;Liu et al 2022a).…”

Section: Biocharmentioning

confidence: 99%

Methods to prepare biosorbents and magnetic sorbents for water treatment: a review

et al. 2023

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Access to drinkable water is becoming more and more challenging due to worldwide pollution and the cost of water treatments. Water and wastewater treatment by adsorption on solid materials is usually cheap and effective in removing contaminants, yet classical adsorbents are not sustainable because they are derived from fossil fuels, and they can induce secondary pollution. Therefore, biological sorbents made of modern biomass are increasingly studied as promising alternatives. Indeed, such biosorbents utilize biological waste that would otherwise pollute water systems, and they promote the circular economy. Here we review biosorbents, magnetic sorbents, and other cost-effective sorbents with emphasis on preparation methods, adsorbents types, adsorption mechanisms, and regeneration of spent adsorbents. Biosorbents are prepared from a wide range of materials, including wood, bacteria, algae, herbaceous materials, agricultural waste, and animal waste. Commonly removed contaminants comprise dyes, heavy metals, radionuclides, pharmaceuticals, and personal care products. Preparation methods include coprecipitation, thermal decomposition, microwave irradiation, chemical reduction, micro-emulsion, and arc discharge. Adsorbents can be classified into activated carbon, biochar, lignocellulosic waste, clays, zeolites, peat, and humic soils. We detail adsorption isotherms and kinetics. Regeneration methods comprise thermal and chemical regeneration and supercritical fluid desorption. We also discuss exhausted adsorbent management and disposal. We found that agro-waste biosorbents can remove up to 68–100% of dyes, while wooden, herbaceous, bacterial, and marine-based biosorbents can remove up to 55–99% of heavy metals. Animal waste-based biosorbents can remove 1–99% of heavy metals. The average removal efficiency of modified biosorbents is around 90–95%, but some treatments, such as cross-linked beads, may negatively affect their efficiency.

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Section: Biocharmentioning

confidence: 99%

Methods to prepare biosorbents and magnetic sorbents for water treatment: a review

et al. 2023

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“…Recently adsorption attracted the researchers' attention as a potential treatment process for ECs (Chang et al, 2022;Tang et al, 2022). Figure S3a Several mechanisms such as pore-filling or partition diffusion, electrostatic interaction, hydrophobic interaction, ion exchange, Hbonding, and π-π interactions can be involved in the adsorption of ECs (Nayyar et al, 2022). Adsorbent is the material that adsorbs the contaminant and subsequently remove it from the aqueous medium (Yap et al, 2019).…”

Section: Adsorptionmentioning

confidence: 99%

Recent trends in treatment technologies of emerging contaminants

Radwan

Ghafar

Ibrahim

et al. 2022

Environmental Quality Mgmt

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In the recent years a group of contaminants, known collectively as emerging contaminants (ECs), have attracted considerable attention due to their widespread in the environment, and lack of knowledge on their impacts on ecosystem and human health. This review gives an overview on the sources, impacts, and conventional treatment technologies of ECs and an in‐depth review of the literature on the state‐of‐the‐art treatment technologies and their performance in the removal of ECs from water sources and drinking water. A careful statistical analysis of the number of publications on the different treatment technologies of ECs was performed to identify the hot spots in this research area. Conventional treatment technologies are not able to remove ECs sufficiently. The discharge of raw or partially treated wastewater is the main source of ECs in the environment. The research in recent years is focusing on using advanced treatment process (AOPs), followed by adsorption and membrane technologies. From a technical point of view, AOPs surpass other treatment technologies as they can completely eradicate ECs without the generation of side products. Developing efficient, green, and cost‐effective materials to be used as adsorbents, photocatalysts, membranes, or membrane fillers, is one of the main research trends nowadays. Combined AOPs based on exploiting solar light, ultrasound and electrochemistry are gaining growing interest and show high potential for the treatment of ECs.

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“…11,19,20 It is also simple to integrate into existing wastewater treatment systems. 21 Several adsorbents have been developed for the removal of antibiotics such as activated carbon 22,23 clays, 24,25 biomass including chitosan, corn cob, banana peel, coffee husk [26][27][28][29] and synthetic metal oxides. 27 Some of these adsorbents do have drawbacks, though.…”

Section: Introductionmentioning

confidence: 99%