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Source: Chemosphere
Drug: Acetic Acid
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Total 117 results found since Jan 2013.
Effective stabilization of per- and polyfluoroalkyl substances (PFAS) precursors in wastewater treatment sludge by surfactant-modified clay
In this study, a green surfactant-modified clay sorbent was evaluated for its efficacy in stabilizing two representative PFAA precursors in sludge, e.g., N-ethyl perfluorooctane sulfonamido acetic acid (N-EtFOSAA) and 6:2 fluorotelomer sulfonic acid (6:2 FTSA), in comparison with unmodified clay and powdered activated carbon (PAC). Results showed N-EtFOSAA and 6:2 FTSA exhibited distinct adsorption behaviors in the sludge without sorbents due to their different physicochemical properties, such as hydrophobicity and functional groups. Among the three sorbents, the modified clay reduced the water leachability of N-EtFOSAA an...
Source: Chemosphere - September 7, 2023 Category: Chemistry Authors: Tao Jiang Md Nahid Pervez Monica M Quianes Weilan Zhang Vincenzo Naddeo Yanna Liang Source Type: research
A novel approach to enhance methane production during anaerobic digestion of waste activated sludge by combined addition of trypsin, nano-zero-valent iron and activated carbon
Chemosphere. 2023 Aug 30;341:140007. doi: 10.1016/j.chemosphere.2023.140007. Online ahead of print.ABSTRACTA novel approach with a combination of trypsin, nano-zero-valent iron (NZVI) and activated carbon (AC) was conducted to promote the methane production of waste activated sludge (WAS) during the anaerobic digestion (AD) processes. Results showed that the combined addition of trypsin-NZVI-AC exhibited the synergistic effect during different AD stages. Trypsin mainly facilitated the hydrolysis process and the acetic acid conversion, while NZVI-AC enhanced the substrate metabolism and the electronic transfer to subsequent...
Source: Chemosphere - September 1, 2023 Category: Chemistry Authors: Qinyuan Lu Siyuan Wang Qian Ping Yongmei Li Source Type: research
From waste to food and bioinsecticides: An innovative system integrating Tenebrio molitor bioconversion and pyrolysis bio-oil production
Chemosphere. 2023 Aug 16:139847. doi: 10.1016/j.chemosphere.2023.139847. Online ahead of print.ABSTRACTTo achieve a waste-free clean production, the present study aimed to valorize an underused agroindustrial byproduct (rice bran) by mealworms bioconversion and produce bio-oil from pyrolysis of insect excreta (frass) as bioinsecticide. To reach the first goal, the suitability of rice bran (RB) versus standard diet, wheat bran (WB), was examined by determining feed conversion, growth performance, and nutritional profile of T. molitor larvae. RB diet was an appropriate feed substrate for breeding mealworms, as evidenced by t...
Source: Chemosphere - August 18, 2023 Category: Chemistry Authors: Rodrigo I ñaki Urrutia Emiliano Nicolas Jesser Victoria Soledad Gutierrez Silvana Rodriguez Fernanda Gumilar Ana Paula Murray Maria Alicia Volpe Jorge Omar Werdin-Gonz ález Source Type: research
Valorisation of the residual aqueous phase from hydrothermally liquefied black liquor by persulphate-based advanced oxidation
Chemosphere. 2023 Aug 4:139737. doi: 10.1016/j.chemosphere.2023.139737. Online ahead of print.ABSTRACTHydrothermal liquefaction of Kraft black liquor is a promising method for the production of valuable organic chemicals. However, the separation of the biochar and biocrude leaves a residual aqueous phase in large volumes, which needs to be properly managed to make the process profitable. In this work, the persulphate-based advanced oxidation was assessed, for the first time ever, as a pretreatment of this aqueous phase to reduce its content of phenolic compounds and alcohols, which hinder further valorisation strategies. R...
Source: Chemosphere - August 6, 2023 Category: Chemistry Authors: Luc ía Pola Sergio Collado Maximilian W örner Ursel Hornung Mario D íaz Source Type: research
Assessment of photo-Fenton and solar photo electro-Fenton processes for the efficient degradation of asulam herbicide
Chemosphere. 2023 Jul 19:139585. doi: 10.1016/j.chemosphere.2023.139585. Online ahead of print.ABSTRACTThe degradation of asulam herbicide by photo electro-Fenton (PEF) and solar photo electro-Fenton (SPEF) processes was studied using an undivided electrochemical BDD/carbon-felt cell to generate H2O2 continuously. Using a central composite design combined with response surface methodology, current intensity = 0.30 A, [Fe2+] = 0.3 mM, and [Na2SO4] = 0.11 M at pH 3 were determined as optimal operating conditions to achieve the complete degradation of asulam by EF. The SPEF process was considered a more efficient treatment in...
Source: Chemosphere - July 21, 2023 Category: Chemistry Authors: H éctor H Vigil-Castillo Edgar J Ruiz Ruiz Khirbet L ópez-Velázquez Laura Hinojosa Reyes Octavio Gaspar-Ram írez Jorge L Guzm án-Mar Source Type: research
New insight into thermal hydrolysis of sewage sludge from solubilisation analysis
This study evaluated the influence of flashing, reaction time, and temperature to understand the mechanism. It was found that while hydrolysis is the primary process (responsible for approximately 76-87% of sludge solubilisation), the sudden decompression via flashing at the end of the process, creating shear force to break the cell membrane, contributes a considerable percentage (approximately 24-13% depended on the treatment conditions) to the solubilisation of treated sludge. More importantly, the decompression helps significantly shorten the reaction time from 30 min to 10 min, which in turn reduces the sludge's colour...
Source: Chemosphere - July 10, 2023 Category: Chemistry Authors: Phuong Linh Ngo Brent R Young Kevan Brian Saeid Baroutian Source Type: research
Magnetite enhancing sludge anaerobic fermentation to improve wastewater biological nitrogen removal: Pilot-scale verification
Chemosphere. 2023 Jun 12:139197. doi: 10.1016/j.chemosphere.2023.139197. Online ahead of print.ABSTRACTAlkaline anaerobic fermentation for acids production has been considered as an effective method to recover resources from waste activated sludge, and magnetite could improve the quality of fermentation liquid. Here we have constructed a pilot-scale sludge alkaline anaerobic fermentation process enhanced by magnetite to produce short chain fatty acids (SCFAs), and used them as external carbon sources to improve the biological nitrogen removal of municipal sewage. Results showed that the addition of magnetite could signific...
Source: Chemosphere - June 14, 2023 Category: Chemistry Authors: Binbin Jiang Donghui Lu Xiaojia Shen Fan Zhang Xiangyang Xu Liang Zhu Source Type: research
Characterization and genome analysis of Acinetobacter oleivorans S4 as an efficient hydrocarbon-degrading and plant-growth-promoting rhizobacterium
In this study, phenotypic analysis and whole genome sequencing were conducted to comprehensively characterize a newly isolated rhizobacterium strain S4, which was identified as Acinetobacter oleivorans, from a TPH-contaminated soil. The strain degraded 62.5% of initially spiked diesel (1%) in minimal media within six days and utilized n-alkanes with a wide range of chain length (i.e., C12 to C40). In addition, the strain showed phenotypic traits beneficial to plant growth, including siderophore production, indole-3-acetic acid synthesis and phosphate solubilization. Potential metabolic pathways and genes encoding proteins ...
Source: Chemosphere - May 1, 2023 Category: Chemistry Authors: Panpan Wang Haiying Wei Tan Ke Yaojia Fu Yuyang Zeng Chaoqi Chen Lanzhou Chen Source Type: research
