Treating MTBE-contaminated water using sewage sludge-derived activated carbon

Liadi, Musiliu A.; Tawabini, Bassam; Shawabkeh, Reyad; Jarrah, Nabeel; Oyehan, Tajudeen A.; Shaibani, Abdulaziz

doi:10.1007/s11356-018-2737-0

Cited by 10 publications

(2 citation statements)

References 39 publications

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“…The maximum CPX removal was obtained at pH of $7 possibly due to the presence of zwitter-ionic form of CPX. The pKa 1 and pKa 2 values for CPX are 6.1 and 8.7, respectively which means that its cationic form (CPX + ) exists at pH less than 6.1 while it is present as CPX À above a pH of 8.7 (Liadi et al, 2018). The pH pzc values for SS_AC and CAC were found to be 4.8 and 5.8, respectively (Figure S4).…”

Section: Determination Of Optimum Conditionsmentioning

confidence: 95%

Optimization for the conditions to prepare sewage sludge derived adsorbent and ciprofloxacin adsorption

Yadav

Singh

Garg

2021

Water Environment Research

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In the present study, sewage sludge (SS) was used to synthesize activated carbon (AC) which was further utilized as adsorbent for the removal of ciprofloxacin (CPX) from synthetic wastewater. The adsorbent was prepared by chemical activation method using ZnCl 2 as activating agent. Design of experiments (DOE) approach was explored to determine the optimum operating conditions for the synthesis of AC and CPX removal from the wastewater. The optimum conditions for AC synthesis (i.e., carbonization temperature = $500 C, activation time = 30 min, and impregnation ratio = 2.26) were decided based on results for three response parameters, that is, adsorbent yield, methylene blue removal, and iodine number. The synthesized adsorbent showed $93% CPX removal (initial CPX concentration = 100 mg/L) at the following optimum conditions: adsorbent dose = 1.31 g/L, pH = 7 and reaction time = 12 h. Langmuir isotherm model was best fit to the equilibrium adsorption data (maximum adsorption capacity of SS derived AC = 102 mg/g) whereas pseudo-second order model showed the best fit to adsorption kinetic data (adsorption capacity = 77.5 mg/g). An effort was also made to reduce fresh water requirement for adsorbent synthesis by recycling the wastewater produced during chemical activation of SS. Practitioner points• Experiment design approach was used for optimization of adsorbent preparation conditions and CPX removal conditions by waste derived adsorbent.• Sewage sludge derived adsorbent had BET surface area of 564 m 2 /g which is comparable to commercial activated carbon.• 93% CPX adsorption with the sewage sludge derived adsorbent at optimum conditions.• Langmuir model better suited the CPX adsorption data.• Wastewater recycling and ZnO recovery from wastewater produced during adsorbent synthesis were performed.

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Section: Determination Of Optimum Conditionsmentioning

confidence: 95%

Optimization for the conditions to prepare sewage sludge derived adsorbent and ciprofloxacin adsorption

Yadav

Singh

Garg

2021

Water Environment Research

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“…The other remediation techniques mentioned above have been reported to have certain limitation(s) when it comes to MTBE. For instance, adsorption has the advantage of generating little or no harmful by-products, but its performance in removing MTBE is limited by the fact that the saturated adsorbents are not regenerable [16,22,23]. Also, air stripping is cheap to operate and has been successfully applied to remediate many VOCs.…”

Section: Introductionmentioning

confidence: 99%

Modeling the efficiency of TiO2 photocatalytic degradation of MTBE in contaminated water: a support vector regression approach

2019

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Methyl tert-Butyl Ether (MTBE) is one of the common environmental contaminants that pose severe risks to human health and the environment. Due to the detrimental effects of MTBE, many efforts have been devoted towards decontamination of wastewater containing MTBE. Most of the reports on the treatment of MTBE are experimental based, which requires studying the effect of several factors such as dosage of the photocatalyst, pH of the medium, the initial concentration of contaminant and the contact time on degradation efficiency in MTBE contaminated waters. Although, this approach is highly dependable and often leads to new insights. However, because the degradation efficiency is influenced by multiple factors, performing experiments to investigate the effect of these factors often increases the experimental burden, thus requiring more time and materials consumption to achieve desirable results. Herein, we propose a computational intelligent strategy to mitigate these challenges. In this contribution, the degradation efficiencies of MTBE in the presence of TiO 2 /UV were modeled under various experimental conditions using the support vector regression model. The model was built using experimental data comprising of inputs such as TiO 2 dose, initial MTBE concentration, UV wavelength and contact time. Remarkably, the developed model exhibits significant accuracy as determined from the values of correlation coefficient (98.27%) and root means square error (5.53). In addition, it was determined that the achievable optimum conditions for degradation of 0.5-100 ppm MTBE-contaminated water were 2.4 g/L of TiO 2 dose with UV radiation, a solution pH of 3 and treatment time of 2 h. This study will be useful in the experimental design of treatment for MTBE, consequently reducing the time spent on running experiments and at the same time ensuring efficient use of resources for treatment of MTBE contaminated water.

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Biosolids and sludge management

Brisolara

Bourgeois

2019

Water Environment Research

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The advancements in the field of sludge and biosolids have been made over the past year. This review outlines the major contributions of researchers that have been published in peer‐reviewed journals and conference proceedings throughout 2018. The review is organized in sections including regulatory developments and market analysis; analysis and quantification of characteristics including microconstituents and metals; treatment advances for the conversion of sludge to biosolids including pretreatment and sludge minimization, conditioning and dewatering, digestion, composting, and innovative technologies; product development and reuse including adsorbents and thermal products, agricultural and other uses, and innovative uses; odor and air emissions; and energy factors.Practitioner points Summary of advances in the field of residuals and biosolids research in 2018. This review outlines the major contributions of researchers that have been published in peer‐reviewed journals and conference proceedings. Topics covered range from regulation to innovation.

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Treating MTBE-contaminated water using sewage sludge-derived activated carbon

Cited by 10 publications

References 39 publications

Optimization for the conditions to prepare sewage sludge derived adsorbent and ciprofloxacin adsorption

Optimization for the conditions to prepare sewage sludge derived adsorbent and ciprofloxacin adsorption

Modeling the efficiency of TiO2 photocatalytic degradation of MTBE in contaminated water: a support vector regression approach

Biosolids and sludge management

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