Ordered Mesoporous Carbons And Its Alginate Composite Adsorbents: Syntheses, Characterizations And Adsorption Performances For Methylene Blue, Chloramphenicol And Riboflavin

Ordered mesoporous carbons (OMC) were synthesized through nanocasting method by using lab-synthesized hexagonal mesoporous silica (HMS) as a template and polyethylene glycol 400 (PEG-400) as a carbon source. One-time variable experimental approach was deployed to study the effect of selected process parameters including carbonization temperature (873-1073 K), dwelling time (15-240 min), heating rate (1-10 K.min-1) and PEG-400 (2.5-15 g) loading on the surface area properties, yields and its ability to remove methylene blue (MB). Karbon mesoliang tersusun (KMT) telah disintesis menerusi kaedah tempa nano menggunakan silika mesoliang heksagonal (SMH) sebagai templat dan polietilena glikol 400 (PEG-400) sebagai sumber karbon. Pendekatan eksperimen pemboleh ubah satu-masa telah digunakan untuk mengkaji kesan parameter proses terpilih termasuk suhu pengkarbonan (873-1073 K), masa penahanan (15-240 min), kadar pemanasan (1-10 K.min-1) dan muatan PEG-400 (2.5-15 g) ke atas sifat-sifat luas permukaan, hasil dan kebolehan untuk menyingkirkan metilena biru (MB)

A mini review of recent progress in the removal of emerging contaminants from pharmaceutical waste using various adsorbents

The presence of emerging contaminants (ECs) originating from pharmaceutical waste in water, wastewater, and marine ecosystems at various geographical locations has been clearly publicised. This review paper presents an overview of current monitoring data on the occurrences and distributions of ECs in coastal ecosystem, tap water, surface water, ground water, treated sewage effluents, and other sources. Technological advancements for EC removal are also presented, which include physical, chemical, biological, and hybrid treatments. Adsorption remains the most effective method to remove ECs from water bodies. Various types of adsorbents, such as activated carbons, biochars, nanoadsorbents (carbon nanotubes and graphene), ordered mesoporous carbons, molecular imprinting polymers, clays, zeolites, and metal–organic frameworks have been extensively used for removing ECs from water sources and wastewater. Extensive findings on adsorptive performances, process efficiency, reusability properties, and other related information are thoroughly discussed in this mini review.The Research University Incentives (RUI) Grant (1001/PJKIMIA/8014064) and the USM Fellowship Programme

Effect of Hydrothermal Carbonization Parameters and Performance of Carbon Dioxide Adsorption on Pineapple Peel Waste Biochar

Low-cost biochar adsorbents were prepared from pineapple peel waste (PPW) via hydrothermal carbonization (HTC) for CO2 capture. The effects of hydrothermal carbonization temperature, retention time, and heating rate were studied. The hydrochar samples were further carbonized to produce pineapple peel biochar adsorbents. The effects of CO2 concentration in the feed, adsorption temperature, and feed flow rate on adsorption capacity were investigated in a fixed-bed column adsorption system. The experimental data were analyzed using pseudo-first-order and pseudo-second-order kinetics, and the Avrami equation. The CO2 adsorption capacity of this system was improved with increasing CO2 feed concentration and decreased with rising temperature and feed flow rate. The Avrami kinetics model was best fitted to the experimental data. The CO2 adsorption performance of PPW biochar (PPW-BC) in a fixed-bed column was successfully predicted by the Thomas and Yoon-Nelson models. The prepared PPW-BC adsorbents could be a viable option for CO2 capture because they were synthesized from a low-cost biomass source and are environmentally benign.This research is funded by the Research University Incentive Grant (PJKIMIA/1001/8014064) provided by the Universiti Sains Malaysia. The first author would also like to acknowledge the financial support by the Ministry of Higher Education (MOHE), Malaysia and Universiti Malaysia Perlis

Crosslinked polymer nanocomposites for wastewater heavy metal adsorption: A review

Public health concerns caused by heavy metals present in wastewater have come to global attention. Heavy metal contamination of water resources will have a negative impact on marine species, the environment, and the ecosystem. A variety of wastewater treatment methods have been developed and improvised throughout the decades to counter this issue. Among the wastewater treatment methods, the adsorption method is believed to have a high potential and is suitable for removing heavy metals from wastewater. This review focuses on selecting various types of crosslinked polymer nanocomposites (CPN) as having a significant role in the removal of heavy metals from wastewater via the adsorption method. The adsorption capacity of the CPN was influenced by the polymer types, nanofiller selection, synthesis methods, and exposure conditions. This article will give us important information to improve the functionality of CPN as an adsorbent in wastewater treatment. The challenge, SWOT (strengths, weaknesses, opportunities, and threats) analysis, and future aspects of the CPN are shared in this review

Performance analysis and green profile assessment of synthesised amino-functionalised magnetic silica nanocomposite for magnetic micro-solid phase extraction of penicillin antibiotics from milk samples

This study explored the synthesis and application of amino-functionalised magnetic silica (Fe3O4 @mSiO2-NH2) nanocomposite as a selective sorbent for the extraction of penicillin antibiotics (PENs) from milk samples via magnetic micro-solid phase extraction (M-µ-SPE). The physicochemical characteristics of the synthesised sorbent were evaluated through important spectroscopy analyses. The adopted M-µ-SPE conditions were: 25 mg of Fe3O4 @mSiO2-NH2; pH 4; 3 min of extraction time; 1 min of desorption time; acetonitrile as the desorption solvent; 10 of salt addition; and 30 mL sample. Under the optimum conditions, the developed method demonstrated satisfactory from 10 to 500 µg/L (r2≥0.9986), low limits of detection (2.5–3.1 µg/L), high analytes recovery (85.2–106.7), and good precision (RSDs≤8,n = 5). The proposed method is rapid, simple, inexpensive, and shows good sensitivity when compared to previously developed methods. This study provides new insight into the development of a new sorbent for PENs and new microscale sample preparation for monitoring PENs in complex milk matrices