The chemical composition and aluminum speciation of sludge incineration residue （SIR） were determined. Cementation of aluminum from sulfuric acid solution using SIR was studied. The results showed that acid-soluble ...
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The chemical composition and aluminum speciation of sludge incineration residue （SIR） were determined. Cementation of aluminum from sulfuric acid solution using SIR was studied. The results showed that acid-soluble inorganic aluminum was the predominant component in the sludge, and the total leached aluminum increased from 62.2% to 92.9% after incineration. Sulfuric acid dosage and reaction time were found to affect aluminum recovery positively. Conversely, the increase in temperature significantly inhibited recovery reactions. The optimized leaching condition was 1.66 g sulfuric acid per gram of SIR with a reaction time of 3 hr at 20°C, resulting in the highest aluminum leaching rate of 96.7%. Compared to commercial aluminum sulfate solution coagulants, the leaching solution demonstrated higher CODCr, turbidity and color removal efficiency for textile wastewater.
Removal characteristics of sulfamethazine （SMZ） by sludge and a bacterial strain using an aerobic sequence batch reactor （ASBR） were studied. Operating conditions were optimized by varying the reaction time and sl...
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Removal characteristics of sulfamethazine （SMZ） by sludge and a bacterial strain using an aerobic sequence batch reactor （ASBR） were studied. Operating conditions were optimized by varying the reaction time and sludge retention time （SRT）. AnAchromobacter sp. （S-3） with the ability to remove SMZ was isolated from the ASBR. The effects of different operating parameters （pH and temperature） on the biodegradation of SMZ by S-3 were determined. The results indicate that, between 0.5 and 4 hr, reaction time of the ASBR had a significant effect on the SMZ removal efficiency in the system. The SMZ removal efficiency also increased from 45% to 80% when SRT was prolonged from 5 to 25 days, although longer SRT had no impact on SMZ removal. The SMZ adsorption rate decreased with increasing temperature, which fitted Freundiich isotherm well. The removal of SMZ in the ASBR was due to the combined effects of adsorption and degradation, and degradation played a leading role.
Rapid industrialization is accompanied by the deterioration of the natural *** deepening crisis associated with the ecological environment has garnered widespread attention toward strengthening environmental monitorin...
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Rapid industrialization is accompanied by the deterioration of the natural *** deepening crisis associated with the ecological environment has garnered widespread attention toward strengthening environmental monitoring and *** sensors are one of the key technologies for environmental monitoring,ultimately enabling environmental *** recent decades,micro/nanomaterials have been widely studied and applied in environmental sensing owing to their unique dimensional *** has been developed and adopted as a facile,quick,and effective technology to produce continuous micro-and nanofiber *** technology has advanced rapidly and become one of the hotspots in the field of nanomaterials *** sensors made from electrospun nanofibers possess many advantages,such as having a porous structure and high specific surface area,which effectively improve their performance in environmental ***,by introducing functional nanomaterials(carbon nanotubes,metal oxides,conjugated polymers,etc.)into electrospun fibers,synergistic effects between different materials can be utilized to improve the catalytic activity and sensitivity of the *** this review,we aimed to outline the progress of research over the past decade on electrospinning nanofibers with different morphologies and functional characteristics in environmental sensors.
Global climate change,growing population,and environmental pollution underscore the need for a greater focus on providing advanced water treatment *** electrochemical basedprocesses are becoming promising solutions,th...
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Global climate change,growing population,and environmental pollution underscore the need for a greater focus on providing advanced water treatment *** electrochemical basedprocesses are becoming promising solutions,they still face challenges owing to mass transport and upscaling which hinder the exploitation of this *** design and reactor configuration are key factors for achieving operational *** electroactive membrane has proven to be a breakthrough technology integrating electrochemistry and membrane separation with an enhanced mass transport by *** this review article,we discuss recent progress in environmental applications of electroactive membranes with particular focus on those composed of carbon nanotubes(CNT)due to their intriguing physicochemical prope *** applications in degradation of refractory contaminants,detoxification and sequestration of toxic heavy metal ions,and membrane fouling alleviations are systematically *** then discuss the existing limitations and opportunities for future *** development of advanced electroactive systems depends on interdisciplinary collaborations in the areas of materials,electrochemistry,membrane development,and environmental sciences.
A new ternary coagulant polysilicate ferromanganese(PSFM),composed of Fe,Mn and Si,was *** coagulation performance for dye removal was investigated systematically together with the impact of several key operational **...
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A new ternary coagulant polysilicate ferromanganese(PSFM),composed of Fe,Mn and Si,was *** coagulation performance for dye removal was investigated systematically together with the impact of several key operational *** experimental results indicate that an excellent coagulation efficiency with higher than 95%color removal and higher than 94%total organic carbon(TOC)removal can be obtained at an optimized molar ratio of Si∶Fe∶Mn(5∶5∶1).The coagulation performance of PSFM coagulant was studied comparatively with other conventional coagulants,*** aluminium chloride(PAC),Al_(2)(SO_(4))_(3)and FeCl_(3).Additionally,various characterization techniques were applied to get detailed morphological and compositional information of PSFM ***,the underlying mechanism for improved coagulant performance was proposed based on these *** results have exemplified quantitatively that PSFM coagulant exhibits a great potential as a promising material for application in various environmental fields.
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