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pH, etc ; arsenites; cost effectiveness; ferrihydrite; hydrolysis; temperature; wastewater; China; Show all 8 Subjects
Abstract:
... An advanced cost-saving method of removal of high-As(III) from SO₄(-II)-rich metallurgical wastewater has been developed by diluting the SO₄(-II) content with As(III)-Cl(-I)-rich metallurgical wastewater and then by the direct precipitation of As(III) with Fe(III) at pH 2.3. As(III) removal at various SO₄(-II)/Cl(-I) molar ratios and temperatures was investigated. The results showed that 65.2‒98.2 ...
pH, etc ; biomineralization; bioremediation; biosorbents; heavy metals; microalgae; potassium; uranium; wastewater; China; Show all 10 Subjects
Abstract:
... As a biosorbent, algae are frequently used for the biotreatment or bioremediation of water contaminated by heavy metal or radionuclides. However, it is unclear that whether or not the biomineralization of these metal or radionuclides can be induced by algae in the process of bioremediation and what the mechanism is. In this work, Ankistrodsemus sp. has been used to treat the uranium-contaminated w ...
pH, etc ; active ingredients; allantoin; cotton; dialysis; durability; electrical conductivity; encapsulation; films (materials); polyamides; Show all 10 Subjects
Abstract:
... Liposomal systems are suitable for cosmetotextile applications because this system shows topical effect on the skin. Allantoin is a skin active ingredient that has moisturizing and re-epithelization effect. In this work, allantoin loaded liposome formulations were prepared by using the thin film hydration method for textile application. The characterization of liposome formulation was performed by ...
pH, etc ; adsorption; almond shells; anodes; biochar; electric current; electrochemistry; mineralization; oxidation; quinones; wastewater; China; Show all 12 Subjects
Abstract:
... The feasibility of decomplexation removal of typical contaminants in electroplating wastewater, complexed Cu(II) with 1-hydroxyethylidene-1,1-diphosphonic acid (Cu-HEDP), was first performed by a three-dimensional electrode reactor with activated biochar as particle electrodes. For the case of 50 mg/L Cu-HEDP, Cu(II) removal (90.7%) and PO₄³⁻ conversion (34.9%) were achieved under the conditions o ...
Bruna Lyra Colombi; Quesli Martins; Cintia Kopsch Imme; Diofer Barboza Da Silva; José Alexandre Borges Valle; Jürgen Andreaus; Manuel José Lis Arias; Rita De Cássia Siqueira Curto Valle
... Pectinases can be used to remove impurities and hydrophobic material from cotton fibers by the degradation of pectic substances. The biochemical characterization and the evaluation of process parameters that influence the enzyme’s activity are mandatory to optimize the industrial application. In the present study, a factorial experimental design was conducted to evaluate the activity of a commerci ...
pH, etc ; adsorbents; adsorption; chromium; ecosystems; formic acid; heavy metals; human health; pollution; porosity; surface area; toxicity; wastewater; water quality; China; Show all 15 Subjects
Abstract:
... Zr-based metal-organic frameworks (MOFs) have been developed in recent years to treat heavy metals, e.g. hexavalent chromium Cr⁶⁺ pollution, which damages the surrounding ecosystem and threaten human health. This kind of MOF is stable and convenient to prepare, but has the disadvantage of low adsorption capacity, limiting its wide application. To this end, a novel formic acid and amino modified MO ...
... Considering that the pH in the tumor microenvironment is dysregulated, we designed a β-hairpin peptide (SSRFEWEFESSᴰPRGDPSSRFEWEFESS). The configuration of the peptide switched from a flexible linear to a rigid loop structure under weakly acidic conditions. The peptide internalized by tumor cells increased significantly under weakly acidic conditions. ...
... The paper deals with the strategy for a quick recovery of reactor treating sulfide and nitrite simultaneously under inhibition caused by high substrate concentration. For influent sulfide concentration of 360 mg S/L, respective sulfide and nitrite removal percentages dropped to 74.19% and 14.33% due to inhibition caused by high sulfide and nitrite concentrations. It was found that reduction in the ...
... The interaction between metal chlorides and electrocoagulation was tested. Precipitation of As(V) was found to be optimal at pH 4.9 using FeCl₂, 2.6 for FeCl₃, 3.8 using AlCl₃, 11.6 using CaCl₂ and 8.6 using MgCl₂. As(V) removal through electrocoagulation went down as initial pH (pHᵢ) of the solution increased. Addition of FeCl₂ increased removal of As(V) at all pHᵢ but was not able to achieve ful ...
pH, etc ; agricultural pollution; bioavailability; biogeochemical cycles; esters; lakes; nuclear magnetic resonance spectroscopy; organic matter; orthophosphates; principal component analysis; risk; rivers; sediments; China; Show all 14 Subjects
Abstract:
... Phosphorus (P) in sediments plays an important role in shallow lake ecosystems and has a major effect on the lake environment. The mobility and bioavailability of P primarily depend on the contents of different P forms, which in turn depend on the sedimentary environment. Here, sediment samples from Baiyangdian (BYD) lake were collected and measured by the Standards, Measurements, and Testing proc ...
... Vacuum ultraviolet (VUV) photolysis is recognized as an environmental-friendly treatment process. Nitrate (NO₃⁻) and natural organic matter (NOM) are widely present in water source. We investigated trichloronitromethane (TCNM) formation during chlorination after VUV photolysis, because TCNM is an unregulated highly toxic disinfection byproduct. In this study: (1) we found reactive nitrogen species ...
... Simultaneously detecting naphthol AS-D chloroacetate esterase (NAS-DCE) and pH is an effective way to separate different granulocytes, which is of great significance for the analysis of blood. A series of fluorescent small molecules (HBT-ASDs) were designed, whose ESIPT process could be logically regulated by NAS-DCE and pH. One typical molecule, HBT-ASD-2, emits three kinds of fluorescence output ...
... Bacterial microcompartments (BMCs) are protein-encapsulated compartments found across at least 23 bacterial phyla. BMCs contain a variety of metabolic processes that share the commonality of toxic or volatile intermediates, oxygen-sensitive enzymes and cofactors, or increased substrate concentration for magnified reaction rates. These compartmentalized reactions have been computationally modeled t ...
Roberto Avolio; Anita Grozdanov; Maurizio Avella; John Barton; Mariacristina Cocca; Francesca De Falco; Aleksandar T. Dimitrov; Maria Emanuela Errico; Pablo Fanjul-Bolado; Gennaro Gentile; Perica Paunovic; Alberto Ribotti; Paolo Magni
... Over the last few decades, a large number of pH sensitive materials with new compositions and structures have been proposed. Solid state sensors based on organic, inorganic and composite materials are actively investigated, with an increasing interest in the performance offered by nano-scale materials. Our review provides a thorough, up-to-date knowledge of a wide range of pH measurement methods a ...
pH, etc ; absorption; electron paramagnetic resonance spectroscopy; irradiation; photocatalysis; photocatalysts; photoluminescence; photolysis; pollution control; synergism; tetracycline; transmission electron microscopy; ultraviolet-visible spectroscopy; wastewater; China; Show all 15 Subjects
Abstract:
... Photocatalytic degradation was considered as a best strategy for the removal of antibiotic drug pollutants from wastewater. The photocatalyst of ABC (Ag₂CO₃/BiOBr/CdS) composite synthesized by hydrothermal and precipitation method. The ABC composite used to investigate the degradation activity of tetracycline (TC) under visible light irradiation. The physicochemical characterization methods (e.g. ...
pH, etc ; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; catalysts; catalytic activity; dielectric spectroscopy; rhodamines; surface area; transmission electron microscopy; ultrasonics; vibration; China; Show all 13 Subjects
Abstract:
... This paper synthesized a new type of ternary piezoelectric catalyst MoOₓ/ZnS/ZnO (MZZ) by a one-step method. The catalytic degradation of Rhodamine B (RhB) solution (10 μg/g, pH = 7.0) shows that the composite catalyst has excellent piezoelectric catalytic activity under ultrasonic vibration (40 kHz). The piezoelectric degradation rate of the optimal sample reached 0.054 min⁻¹, which was about 2.5 ...
... Surface-Enhanced Raman Scattering (SERS) has been widely used in pH sensing. However, SERS sensors capable of stably analysing pH under highly alkaline conditions are still scarce. In this work, a SERS pH sensor employing Alizarin Yellow R as the molecular probe was carefully developed for strong alkaline solutions. The results showed that the probe presented excellent sensing performance in the p ...
... Glycogen-like particles (GLPs) were built up from sucrose by applying de novo one-pot enzymatic process of amylosucrase (ASase; 6 U·mL⁻¹) and glycogen branching enzymes (GBEs; 0.001 and 0.005 U·mL⁻¹). Due to different chain-length transferring patterns of GBEs, structurally differentiated GLPs were synthesized. Yields of GLPs synthesized at pH 7.0 and 30 °C were improved by increasing the GBE/ASas ...
... Regeneration and reuse of draw solute (DS) is a key challenge in the application of forward osmosis (FO) technologies. Herein, EDTA-Na₂ was studied as a recoverable DS for water extraction by taking advantages of its pH-responsive property. The FO system using EDTA DS achieved a higher water flux of 2.22 ± 0.06 L m⁻² h⁻¹ and a significantly lower reverse salt flux (RSF) of 0.06 ± 0.01 g m⁻² h⁻¹, c ...
... A high-throughput microrheological assay is employed to assess the gelation kinetics of a coiled-coil protein, Q, across a compositional space with varying ionic strengths and pH values. Two methods of passive microrheology─multiple particle tracking (MPT) and differential dynamic microscopy (DDM)─are used to determine mean-squared displacements of tracer beads embedded in protein solutions with r ...