ORCID Profile
0000-0003-0126-4617
Current Organisation
King Abdullah University of Science and Technology
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Publisher: Elsevier BV
Date: 03-2022
Publisher: Elsevier BV
Date: 06-2021
Publisher: Elsevier BV
Date: 09-2020
Publisher: Elsevier BV
Date: 12-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0EW00187B
Abstract: Phosphorus is a critical non-renewable mineral essential for sustainable crop production.
Publisher: Elsevier BV
Date: 10-2019
Publisher: Elsevier BV
Date: 11-2020
Publisher: Elsevier BV
Date: 08-2018
DOI: 10.1016/J.CHEMOSPHERE.2018.04.053
Abstract: Over the past few decades, removal and recovery of Lanthanum (La) have received great attention due to its significance in different industrial processes. In this review, the application of various adsorbents viz. biosorbents, commercial and hybrid materials, nanoparticles, nanocomposites etc. have been summarized in terms of the removal and recovery of La. The influence of various operating parameters including pH, dosage, contact time, temperature, coexisting ions, adsorption kinetics, isotherm and thermodynamics were investigated. Statistical analysis of the obtained data revealed that 60% and 70% of the authors reported an optimum pH of 4-6 and a dose of 1-2 g/L, respectively. It can be concluded on the basis of an extensive literature survey that the adsorbent materials (especially hybrids nanocomposites) containing carboxyl, hydroxyl and amine groups offered efficient La removal over a wide range of pH with higher adsorption capacity as compared to other adsorbents (e.g., biosorbents and magnetic adsorbents). Also, in most cases, equilibrium and kinetics were followed by Langmuir and pseudo second-order model and adsorption was endothermic in nature. To evaluate the adsorption efficiency of several adsorbents towards La, desorption and regeneration of adsorbents should be given due consideration. The main objective of the review is to provide an insight into the important factors that may affect the recovery of La using various adsorbents.
Publisher: Elsevier BV
Date: 10-2017
DOI: 10.1016/J.JENVMAN.2017.06.014
Abstract: White-rot fungi (WRF) and their ligninolytic enzymes have been investigated for the removal of a broad spectrum of trace organic contaminants (TrOCs) mostly from synthetic wastewater in lab-scale experiments. Only a few studies have reported the efficiency of such systems for the removal of TrOCs from real wastewater. Wastewater derived organic and inorganic compounds can inhibit: (i) WRF growth and their enzyme production capacity (ii) enzymatic activity of ligninolytic enzymes and (iii) catalytic efficiency of both WRF and enzymes. It is observed that essential metals such as Cu, Mn and Co at trace concertation (up to 1 mM) can improve the growth of WRF species, whereas non-essential metal such as Pb, Cd and Hg at 1 mM concentration can inhibit WRF growth and their enzyme production. In the case of purified enzymes, most of the tested metals at 1-5 mM concentration do not significantly inhibit the activity of laccases. Organic interfering compounds such as oxalic acid and ethylenediaminetetraacetic acid (EDTA) at 1 mM concentration are potent inhibitors of WRF and their extracellular enzymes. However, inhibitory effects induced by interfering compounds are strongly influenced by the type of WRF species as well as experimental conditions (e.g., incubation time and TrOC type). In this review, mechanisms and factors governing the interactions of interfering compounds with WRF and their ligninolytic enzymes are reviewed and elucidated. In addition, the performance of WRF and their ligninolytic enzymes for the removal of TrOCs from synthetic and real wastewater is critically summarized.
Publisher: Springer Science and Business Media LLC
Date: 25-08-2016
Publisher: Elsevier BV
Date: 09-2020
Publisher: Elsevier
Date: 2019
Publisher: Informa UK Limited
Date: 20-02-2015
Publisher: Elsevier
Date: 2023
Publisher: Elsevier BV
Date: 08-2017
DOI: 10.1016/J.CHEMOSPHERE.2017.04.048
Abstract: Relaxation and backwashing have become an integral part of membrane bioreactor (MBR) operations for fouling control. This study was carried out on real municipal wastewater to evaluate the influence of different operational strategies on membrane fouling at equivalent water yield. Four relaxation modes (MBR
Publisher: Elsevier BV
Date: 09-2021
Publisher: Elsevier BV
Date: 10-2017
Publisher: Elsevier BV
Date: 05-2020
Publisher: Elsevier BV
Date: 03-2022
DOI: 10.1016/J.JHAZMAT.2021.127988
Abstract: For the first time in this study, CoAl-layered double hydroxide nanosheet membrane (LDH
Publisher: Elsevier BV
Date: 11-2021
Publisher: Elsevier BV
Date: 06-2023
Publisher: Elsevier BV
Date: 05-2023
Publisher: Springer Science and Business Media LLC
Date: 23-01-2017
Publisher: Elsevier BV
Date: 12-2020
Publisher: Informa UK Limited
Date: 11-04-2019
Publisher: Springer Science and Business Media LLC
Date: 03-08-2022
Publisher: Elsevier BV
Date: 02-2023
Publisher: Springer Science and Business Media LLC
Date: 16-04-2015
Publisher: Elsevier BV
Date: 03-2022
Publisher: Elsevier
Date: 2021
Publisher: Elsevier BV
Date: 2018
DOI: 10.1016/J.BIORTECH.2017.09.129
Abstract: Laccase-catalyzed degradation of a broad spectrum of trace organic contaminants (TrOCs) by a membrane distillation (MD)-enzymatic membrane bioreactor (EMBR) was investigated. The MD component effectively retained TrOCs (94-99%) in the EMBR, facilitating their continuous biocatalytic degradation. Notably, the extent of TrOC degradation was strongly influenced by their molecular properties. A significant degradation (above 90%) of TrOCs containing strong electron donating functional groups (e.g., hydroxyl and amine groups) was achieved, while a moderate removal was observed for TrOCs containing electron withdrawing functional groups (e.g., amide and halogen groups). Separate addition of two redox-mediators, namely syringaldehyde and violuric acid, further improved TrOC degradation by laccase. However, a mixture of both showed a reduced performance for a few pharmaceuticals such as primidone, carbamazepine and ibuprofen. Mediator addition increased the toxicity of the media in the enzymatic bioreactor, but the membrane permeate (i.e., final effluent) was non-toxic, suggesting an added advantage of coupling MD with EMBR.
Publisher: MDPI AG
Date: 28-08-2017
DOI: 10.3390/APP7090879
Publisher: Elsevier BV
Date: 10-2020
Publisher: Elsevier BV
Date: 06-2021
Publisher: Springer International Publishing
Date: 2018
Publisher: Elsevier BV
Date: 2023
DOI: 10.1016/J.JHAZMAT.2022.129951
Abstract: Iron (Fe)-based catalysts are widely used for taming nitrogen oxides (NO
Publisher: Elsevier
Date: 2021
Publisher: Elsevier BV
Date: 09-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9EW01022J
Abstract: This study presents the performance of an integrated laccase and persulfate oxidation process for trace organic contaminant degradation and elucidates the performance governing factors.
Publisher: MDPI AG
Date: 26-01-2018
DOI: 10.3390/W10020107
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0EW90029J
Abstract: Correction for ‘Emerging investigator series: phosphorus recovery from municipal wastewater by adsorption on steelmaking slag preceding forward osmosis: an integrated process’ by Biplob Kumar Pramanik et al. , Environ. Sci.: Water Res. Technol. , 2020, DOI: 10.1039/d0ew00187b.
Publisher: Elsevier BV
Date: 2021
Publisher: Springer Science and Business Media LLC
Date: 27-09-2018
DOI: 10.1007/S11356-018-3256-8
Abstract: High retention membrane bioreactors (HR-MBR) combine a high retention membrane separation process such as membrane distillation, forward osmosis, or nanofiltration with a conventional activated sludge (CAS) process. Depending on the physicochemical properties of the trace organic contaminants (TrOCs) as well as the selected high retention membrane process, HR-MBR can achieve effective removal (80-99%) of a broad spectrum of TrOCs. An in-depth assessment of the available literature on HR-MBR performance suggests that compared to CAS and conventional MBRs (using micro- or ultra-filtration membrane), aqueous phase removal of TrOCs in HR-MBR is significantly better. Conceptually, longer retention time may significantly improve TrOC biodegradation, but there are insufficient data in the literature to evaluate the extent of TrOC biodegradation improvement by HR-MBR. The accumulation of hardly biodegradable TrOCs within the bioreactor of an HR-MBR system may complicate further treatment and beneficial reuse of sludge. In addition to TrOCs, accumulation of salts gradually increases the salinity in bioreactor and can adversely affect microbial activities. Strategies to mitigate these limitations are discussed. A qualitative framework is proposed to predict the contribution of the different key mechanisms of TrOC removal (i.e., membrane retention, biodegradation, and sorption) in HR-MBR.
Publisher: Elsevier BV
Date: 08-2021
Publisher: Springer International Publishing
Date: 2023
DOI: 10.1007/698_2022_871
Publisher: Informa UK Limited
Date: 09-12-2014
Publisher: Elsevier BV
Date: 11-2018
DOI: 10.1016/J.BIORTECH.2018.07.066
Abstract: This study systematically compares the performance of ultrafiltration (UF) and nanofiltration (NF) based enzymatic membrane bioreactors (EMBRs) for the degradation of five micropollutants, namely atrazine, carbamazepine, sulfamethoxazole, diclofenac and oxybenzone to elucidate the impact of effective membrane retention of micropollutants on their degradation. Based on the permeate quality, NF-EMBR achieved 92-99.9% micropollutant removal (i.e., biodegradation + membrane retention), while the removal of these micropollutants by UF-EMBR varied from 20 to 85%. Mass balance analysis revealed that micropollutant degradation was improved by 15-30% in NF-EMBR as compared to UF-EMBR, which could be attributed to the prolonged contact time between laccase and micropollutants following their effective retention by the NF membrane. A small decline in permeate flux was observed during EMBR operation. However, the flux could be recovered by flushing the membrane with permeate.
Publisher: Elsevier BV
Date: 11-2020
Publisher: Elsevier
Date: 2023
Publisher: Elsevier BV
Date: 04-2021
Publisher: Elsevier BV
Date: 09-2022
DOI: 10.1016/J.CHEMOSPHERE.2022.135103
Abstract: The nitrogen and sulphur oxide (NO
Publisher: Elsevier BV
Date: 08-2021
Publisher: Desalination Publications
Date: 2017
Location: Saudi Arabia
No related grants have been discovered for Muhammad Bilal Asif.