Wastewater Treatment through Low Cost Adsorption Technologies

Montes-Atenas, Gonzalo; Valenzuela, Fernando

doi:10.5772/67097

Cited by 6 publications

(8 citation statements)

References 38 publications

(38 reference statements)

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“…This mechanism aims at removing pollutants from an aqueous phase by fixing them onto a surface of a solid which is stable when immersed in the wastewater. The adsorption mechanism is one of the preferred reactions for wastewater treatment not only because low-cost adsorbents consisting of by-products or wastes from other industries may be used, but also because it may reach high removing efficiencies of dissolved molecules with final concentrations of a few parts per billion [69]. Figure 10 presents several aspects to consider when picking up this mechanism.…”

Section: Adsorption: Chemisorptionmentioning

confidence: 99%

Fundamentals and Practical Aspects of Acid Mine Drainage Treatment: An Overview from Mine Closure Perspective

Montes-Atenas¹

2022

Wastewater Treatment

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Acid mine drainage (AMD) is perhaps one of the most relevant challenges the mining industry has faced during the last few decades. This issue is particularly important in the scenario of mine closure where mining processes cease to be active, and the sustainability of the sites needs to be re-established. This chapter reviews the fundamentals behind the generation of AMD as well as a set of physicochemical phenomena (chemisorption, precipitation, neutralisation, etc.) usually considered by researchers to mitigate it. Mine closure conditions where human presence is seldom or frankly rare turn the wastewater treatment even more challenging as it cannot be intensive in the utilization of reagents, energy, or human resources. Therefore, from a practical standpoint, passive-like wastewater treatment strategies mimicking nature are preferred. Finally, insights with regards to the complexities behind the implementation of pilot plant and industrial wastewater treatment systems conformed by long-term reactive barriers and constructed wetlands are also revised.

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Section: Adsorption: Chemisorptionmentioning

confidence: 99%

Fundamentals and Practical Aspects of Acid Mine Drainage Treatment: An Overview from Mine Closure Perspective

Montes-Atenas¹

2022

Wastewater Treatment

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“…Pine bark like other biosorbents is able to retain various types of organic and inorganic pollution [47][48][49] . The bark also acts as a natural biofilter for solid particles 48 , thus contributes to the retention of microalgae biomass and wastewater treatment. The suspended particles were mechanically retained on the pine bark surface which confirms a significant decrease in turbidity of sewage after 7 days of the experiment.…”

Section: +42mentioning

confidence: 99%

The use of a natural substrate for immobilization of microalgae cultivated in wastewater

Garbowski

Pietryka

Pulikowski

et al. 2020

Sci Rep

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The methods of separation of microalgae has a significant impact in the economic aspects of their cultivation. in this study, pine bark was used as a substrate for immobilization of microalgal biomass cultivated in raw municipal sewage. the experiment was conducted in cylindrical photobioreactors (PBRs) with circulation of wastewater. Biomass was cultivated for 42 days. After that time, abundant growth of the biofilm with microalgae on the surface of pine bark as well as improvement of the quality of treated sewage were observed. The efficiency of removal of nutrients from wastewater was 64-81% for total nitrogen and 97-99% for total phosphorus. Moreover, the concentration of suspended solids in sewage was reduced, which resulted in a decrease in turbidity by more than 90%. Colorimetric analysis and Volatile Matter (VM) content in the substrate showed a decrease in the Higher Heating Value (HHV) and concentration of VM due to the proliferation of biofilm.

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“…Responsible Editor: Tito Roberto Cadaval Jr Moreover, these schemes generally suffer from drawbacks such as low % removal, high cost, sludge-formation, and complicated setup (Camargo et al 2016;Verma et al 2012;Montes-Atenas and Valenzuela 2017;Hai et al 2007;Geaniyu et al 2015;El-Gendy et al 2020;Al-Saad et al 2019;El-Azazy et al 2019c, d). Adsorption is a promising technique that offers many advantages such as being convenient with simple setup, low cost, high removal efficiency, and good output quality.…”

Section: Introductionmentioning

confidence: 99%

Watermelon rinds as cost-efficient adsorbent for acridine orange: a response surface methodological approach

El-Shafie

Hassan

Akther

et al. 2021

Environ Sci Pollut Res

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In the current investigation, watermelon rinds (WMR) have been utilized as an eco-friendly and cost-efficient adsorbent for acridine orange (AO) from contaminated water samples. Adsorption of AO onto raw (RWM) and thermally treated rinds (TTWM250 and TTWM500) has been studied. The adsorption efficiency of the three adsorbents was evaluated by measuring the % removal (%R) of AO and the adsorption capacity (qe, mg/g). Dependent variables (%R and qe) were optimized as a function of four factors: pH, sorbent dosage (AD), the concentration of AO (DC), and contact time (ST). Box–Behnken (BB) design has been utilized to obtain the optimum adsorption conditions. Prepared adsorbents have been characterized using scanning electron microscopy (SEM), Fourier-transform infrared (FT-IR), and Raman spectroscopies. The surface area of RWM, TTWM250, and TTWM500, as per the Brunauer-Emmett-Teller (BET) analysis, was 2.66, 2.93, and 5.03 m2/g, respectively. Equilibrium investigations suggest that Freundlich model was perfectly fit for adsorption of AO onto TTWM500. Maximum adsorption capacity (qmax) of 69.44 mg/g was obtained using the Langmuir equation. Adsorption kinetics could be best described by the pseudo-second-order (PSO) model. The multi-cycle sorption-desorption study showed that TTWM500 could be regenerated with the adsorption efficiency being preserved up to 87% after six cycles.

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Wastewater Treatment through Low Cost Adsorption Technologies

Cited by 6 publications

References 38 publications

Fundamentals and Practical Aspects of Acid Mine Drainage Treatment: An Overview from Mine Closure Perspective

Fundamentals and Practical Aspects of Acid Mine Drainage Treatment: An Overview from Mine Closure Perspective

The use of a natural substrate for immobilization of microalgae cultivated in wastewater

Watermelon rinds as cost-efficient adsorbent for acridine orange: a response surface methodological approach

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