The detrimental effects and mechanisms of Orlistat in disrupting energy homeostasis and reproduction in Daphnia magna.

Orlistat (ORL) has been employed as an anti-obesity pharmaceutical for several decades. Given its low absorption rate, the majority of administered ORL is excreted into the environment with feces. It is crucial to collect scientific information regarding the possible ecological risks associated with ORL.

Metagenomic analysis reveals enhanced sludge dewaterability through acidified sludge inoculation: Regulation of Fe (II) oxidation electron transport pathway.

The bioleaching utilizing indigenous microbial inoculation can continuously improve the dewaterability of sludge. In this study, metagenomic analysis was innovative employed to identify the key microorganisms and functional genes that affect the dewatering performance of sludge in the bioleaching conditioning process. The results demonstrated that long-term repeated inoculation of acidified sludge resulted in increased abundance of many functional genes associated with the transport of carbohydrate and amino acid.

Enhancement of sludge dewaterability using combined technology of bioleaching and Fenton: Microscopic structure and hydrophilic/hydrophobic properties of sludge particles.

Bioleaching and Fenton technology are commonly used preconditioning techniques for sludge dewatering. This study compared the dewatering mechanisms of different conditioning technologies. The results showed that bound water, specific resistance to filtration (SRF), and capillary suction time decreased from 3.

The role of microstructure of extracellular proteins in dewaterability of alkaline pretreatment sludge during bioleaching.

Alkaline pre-treatment is known to enhance the acid production efficiency of sludge but adversely affects its dewatering performance. In this study, the improvement of sludge dewaterability by a novel bioleaching system with inoculating domesticated acidified sludge (AS) and its underlying mechanism were investigated. The results showed that although the addition of Fe and the reduction of pH improved the dewatering performance of sludge, their effects were inferior to that of AS + Fe.

Improved supercapacitors and water splitting performances of Anderson-type manganese(III)-polyoxomolybdate through assembly with Zn-MOF in a host-guest structure.

Enhancing performance through the combination of polyoxometalates (POMs) clusters with metal-organic frameworks (MOFs) that contain various transition metals is a challenging task. In this study, we synthesized a polyoxometalate-based metal-organic framework (POMOF) named HRBNU-5 using a solvothermal method. HRBNU-5 is composed of Zn[N(CH)][MnMoO{(OCH)CNH}]@Zn(CHO)·6CHNO, which includes two components: Zn[N(CH)][MnMoO{(OCH)CNH}]·3CHNO ({Zn[MnMo]}) and Zn(CHO)·3CHNO (Zn-BTC).

Enhancement of sludge dewaterability by repeated inoculation of acidified sludge: Extracellular polymeric substances molecular structure and microbial community succession.

Improving the dewatering performance of sewage sludge is of great scientific and engineering significance in the context of accelerated urbanization and increasingly strict environmental regulations. Acidified sludge (AS) can improve sludge dewatering performance, but the dewatering effect of repeated inoculation is unclear. The effects of long-term repeated inoculation of AS on the sludge dewaterability were investigated.

Simultaneous partial nitrification, denitrification, and phosphorus removal in sequencing batch reactors via controlled reduced aeration and short-term sludge retention time decrease.

Simultaneous bio-treatment processes of organic carbon (C)-, nitrogen (N)-, and phosphorus (P)-containing wastewater are challenged by insufficient carbon sources in the effluent. In the present study, two parallel anaerobic/aerobic sequencing batch reactors (R-1 and R-2) treating low C/N (≤4) wastewater were employed using different partial nitrification start-up strategies, controlled reduced aeration, and decreased sludge retention time. Advanced removal efficiencies for NH-N (≥96%), total nitrogen (TN, ≥86%), PO-P (≥95%), and COD (≥91%) were realized, with TN and PO-P effluent concentrations of 10.

A host-guest compound formed by Cu[PWO] and HKUST-1 with capacitance and HO sensing properties.

Polyoxometalate-based metal-organic frameworks (POMOFs) have received wide attention in supercapacitors and HO detection due to their possession of the rich redox active sites of polyoxometalates (POMs) and the ordered structure of metal-organic frameworks (MOFs). In this study, we successfully synthesized a host-guest Cu[PWO]@HKUST-1 (HRBNU-7) compound by a grinding method. Cu[PWO] successfully entered the HKUST-1 pores as confirmed by the results of infrared (IR) spectroscopy, powder X-ray diffraction (PXRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM).

Nanomaterial with Core-Shell Structure Composed of {PWO} and Cobalt Homobenzotrizoate for Supercapacitors and HO-Sensing Applications.

Designing and preparing dual-functional Dawson-type polyoxometalate-based metal-organic framework (POMOF) energy storage materials is challenging. Here, the Dawson-type POMOF nanomaterial with the molecular formula CoK[PWO]@Co(btc) (abbreviated as {PW}@Co-BTC, Hbtc = 1,3,5-benzylcarboxylic acid) was prepared using a solid-phase grinding method. XRD, SEM, TEM et al.

An inorganic-organic hybrid nanomaterial with a core-shell structure constructed by using Mn-BTC and Ag[BWO] for supercapacitors and photocatalytic dye degradation.

Creating inorganic-organic hybrids with polyoxometalates (POMs) and metal-organic frameworks (MOFs) as energy storage and dye-degradation materials remains challenging. Here, a new hybrid nanomaterial Mn-BTC@Ag[BWO] is synthesized by using Ag[BWO] and Mn(BTC)(HO) (Mn-BTC, BTC = 1,3,5-benzenetricarboxylic acid) through a plain grinding method. The structure and morphology characterization by scanning electron microscopy (SEM), powder X-ray diffraction (XRD), and transmission electron microscopy (TEM) shows that the synthetic products have core-shell construction.

Synergistic effect of yeast integrated with alkyl polyglucose for short-chain fatty acids production from sludge anaerobic fermentation.

An efficient strategy for short-chain fatty acid (SCFA) production from sludge anaerobic fermentation was proposed with the combination of yeast and alkyl polyglucose (APG). It revealed that the synergetic effect of yeast and APG could boost the SCFA concentration to the maximum value of 2800.34 mg COD/L within 9 days at 0.

Porous {PMoO}-type Poly(oxometalate) Metal-Organic Frameworks for Improved Pseudocapacitance and Electrochemical Sensing Performance.

{PMo} poly(oxometalate) (POM) clusters have huge steric hindrance and limited active oxygen atoms, which make them difficult to combine with metal-organic units to form three-dimensional (3D) porous structures. Therefore, functionalization of such POMs has always been a bottleneck that is difficult to break through. In this study, {PMo} POM was successfully grafted on a lock-like metal-organic chain to generate a multiporous coordination polymer, [{Na(HO)(Hbtb)}{Cu(HO)(pz)Cl}{HSr⊂PMoMoO}]·3HO () (pz = pyrazine; btb = 1,4-bis(1,2,4-triazole) butane).

A hybrid borotungstate-coated metal-organic framework with supercapacitance, photocatalytic dye degradation and HO sensing properties.

The compounding of polyoxometalates (POMs) with structurally well-defined and porous metal-organic frameworks (MOFs) has become a hot research topic. Here, a core-shell type hybrid, {AgBWO}@[Ag(μ-Hbtc)(μ-Hbtc)] (called {AgBWO}@Ag-BTC-2, where BTC = 1,3,5-benzyl carboxylic acid), was successfully prepared a simple grinding method. IR, XRD, SEM, TEM, and XPS analysis was used to confirm the structure.

Effect of pyrolysis temperature on the activated permonosulfate degradation of antibiotics in nitrogen and sulfur-doping biochar: Key role of environmentally persistent free radicals.

Because of the increasingly widespread contamination of antibiotics, the preparation of biochar by heteroatom doping to further improve the catalytic degradation efficiency of antibiotics has become a major focus of research. In this study, N-doped (NBC), S-doped (SBC), and NS-doped (NSBC) moso bamboo biochar were obtained at preparation temperatures of 300-700 °C. The concentration of environmentally persistent free radicals (EPFRs) in all biochars peaked when the preparation temperature was 500 °C: 2.

Sludge disintegration and phosphorus migration in anaerobic fermentation of waste activated sludge by the addition of EDTA-2Na.

The effects of the addition of EDTA-2Na on sludge disintegration and phosphorus (P) migration during anaerobic fermentation (AF) of waste activated sludge (WAS) are investigated. The efficiency of sludge disintegration was positively correlated with the dose of EDTA-2Na from 0.5-2.

Enhancements of short-chain fatty acids production via anaerobic fermentation of waste activated sludge by the combined use of persulfate and micron-sized magnetite.

The combination of persulfate (PDS) with micron-sized magnetite (FeO) was introduced into the process of anaerobic fermentation (AF) to scrutinize the short chain fatty acid (SCFA) production from waste activated sludge for the first time. The synergetic effect of PDS and FeO results in the promotion of intracellular and extracellular substance liberation, augment in key hydrolases activities, and enrichment of hydrolytic and acidifying microbial population. Meanwhile, carbohydrate, amino acid, and energy metabolism as well as enzymes, are considerably accelerated.

Cu/Ag Complex Modified Keggin-Type Coordination Polymers for Improved Electrochemical Capacitance, Dual-Function Electrocatalysis, and Sensing Performance.

Different metal-organic units were introduced into the {PMo} polyoxometalate (POM) system to yield three porous coordination polymers with distinct characteristics, {Cu(pra)}[{Cu(pra)}{PMoMoO}] (), [{Ag(pz)(HO)Cl}{PMoMoO}] (), and [{Cu(bpz)(HO)}{PMoO}] () (pra = pyrazole; pz = pyrazine; bpz = benzopyrazine), via an hydrothermal method. In comparison with the maternal Keggin cluster and most reported POM electrode materials, compounds - exhibit larger specific capacitances (672.2, 782.

Effect of magnetite on anaerobic digestion treating saline wastewater: Methane production, biomass aggregation and microbial community dynamics.

In this study, the effect of magnetite amendment on anaerobic digestion was investigated at three increasing salinity levels (0.5%, 1% and 2% NaCl). The amendment of magnetite enhanced the methane yield by 36.

Wells-Dawson Arsenotungstate Porous Derivatives for Electrochemical Supercapacitor Electrodes and Electrocatalytically Active Materials.

Two Wells-Dawson arsenotungstate coordination polymers, [{Cu(bim)}(AsWO)] () and [(CupzCl)(AsWO)] (bim = 2,2'-biimidazole; pz = pyrazine), have been assembled via a hydrothermal method and fully characterized. Compound exhibits a 2,6-connected two-dimensional hybrid layer based on asymmetrically modified {AsW} anions and {Cu(bim)} linkers, which is extended to a three-dimensional network with a special interlayer structure and a one-dimensional tunnel. Compound is a host-guest framework that consists of a Cu-pz-Cl network with 20-member square rings, 16-member irregular rings, and embedded eight-node {AsW} guest molecules.

Effect of potassium persulphate addition on sludge disintegration of a mesophilic anaerobic fermentation system.

Persulphates, an advanced oxidation process, has been recently used as an alternative pretreatment method to enhance short-chain fatty acids (SCFAs) yield from waste-activated sludge (WAS) anaerobic fermentation (AF). But so far, the effects of peroxydisulphate (PDS) dosages on mesophilic anaerobic fermentation are still not studied fully. Herein, we explored the influences of potassium PDS addition on mesophilic AF of WAS.

Influence of reusable polypropylene packing on ammonia and greenhouse gas emissions during sewage sludge composting-a lab-scale investigation.

Bulking agents are particularly important for sewage sludge composting. In this study, reusable polypropylene packing (RPP) was mixed with sawdust to improve composting. The effect of the mix ratio of sawdust and RPP on the physicochemical characteristics, nitrogen transformation, and emissions of greenhouse gas (GHG) as well as differences in the germination index values was detected in a lab-scale composting experiment.

Multinuclear Transition Metal Sandwich-Type Polytungstate Derivatives for Enhanced Electrochemical Energy Storage and Bifunctional Electrocatalysis Performances.

Different transition metal (TM) units are introduced into a trivacant Keggin cluster to form three sandwich polytungstate derivatives, (Hen)[{K(HO)}{K(HO)}{Ni(HO)(en)}{Ni(HO)(PWO)}] (), [Cu(Himi){AsWO}]·5HO (), and (Hbtp)[FeFe(HO)(AsW O)]·4HO () (en = ethanediamine; imi = imidazole; btp = 1,3-bis(1, 2, 4-triazol-1-yl) propane). Compound is a 2,3,8-connected 3D network with {4}{4·6·8·6·8}{6} topology based on bisupported tetra-Ni sandwich phosphotungstate and two kinds of potassium connection units. Compound is a dense 12-connected 3D supramolecular network with {3·4·5} topology based on hexa-Cu(imi) sandwiched arsenotungstate.

Adding Phosphate Fertilizer and Apple Waste to Pig Manure during Composting Mitigates Nitrogen Gas Emissions and Improves Compost Quality.

Calcium superphosphate and apple ( Mill.) waste can be used for controlling N loss and improving compost quality during composting, whereas integrated addition of the two additives on composting process remains unexplored. Therefore, this study was conducted to investigate the effects of combined use of calcium superphosphate and apple waste on NH and NO emissions and compost quality during pig manure and wheat ( L.

A Host-Guest Supercapacitor Electrode Material Based on a Mixed Hexa-Transition Metal Sandwiched Arsenotungstate Chain and Three-Dimensional Supramolecular Metal-Organic Networks with One-Dimensional Cavities.

The mixed hexa-transition metal (hexa-TM) sandwiched arsenotungstate derivative, [Cu(pz)(phen)][Cu(phen)][{Na(HO)}{(VCuO)(AsWO)}]·6HO (1) (pz = pyrazine; phen = 1,10-phenanthroline), has been hydrothermally synthesized and structurally characterized. In compound 1, two {AsWO} clusters are connected by mixed hexa-TM ring unit {VCuO} to form a sandwich-type dimer, which are further bonded in "ABAB" mode by the {Na(HO)} linker resulting in pure inorganic chains. The unique "L-shaped" trinuclear complex {Cu(phen)(pz)} is supported together via staggered π-π interactions to generate extending waveform two-dimensional supramolecular layers, which are further aggregated with their adjacent analogues by complexes {Cu(phen)} via H-bonding interaction to yield an unprecedented three-dimensional (3D) metal-organic networks with one-dimensional (1D) cavities.