Exploring Humic Acid as an Efficient and Selective Adsorbent for Lead Removal in Multi-Metal Coexistence Systems: A Review

Separations, Год журнала: 2024, Номер 11(3), С. 80 - 80

Опубликована: Март 4, 2024

Water pollution poses a global threat to human health, particularly in terms of ensuring safe supply drinking water. The accumulation heavy metals from various water sources is increasing, driving the search for effective and environmentally friendly approaches materials metal removal. This review investigates selective adsorption Pb2+ by humic acid (HA) multi-metal coexistence solution. focus on discussing structural identification HA, highlighting that separation techniques are an method reduce its heterogeneity. Starting key units study reveals interaction between HA metals. Approaches enhance explored, proposing introducing activating groups, Ca ion exchange, optimizing pore structures improving lead adsorption. Ca2+ activation suggested as future research direction lead-selective Additionally, attaining through pH regulation’s significance emphasized. contributes fundamental understanding HA’s role adsorbent while offering practical implications developing materials. results aim advance knowledge environmental science treatment.

Язык: Английский

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Accumulation of Ag(0) Single Atoms at Water/Mineral Interfaces during Sunlight-Induced Reduction of Ionic Ag by Phenolic DOM

Environmental Science & Technology, Год журнала: 2023, Номер 57(49), С. 20822 - 20829

Опубликована: Ноя. 28, 2023

Silver (Ag) undergoes a complex and dynamic Ag+/Ag0 cycle under environmental conditions. The Ag+ → Ag nanoparticles (AgNPs) transformation due to the combined actions of sunlight, O2, dissolved organic matter has been well-known phenomenon. In this study, we indicate that process may be accompanied by pronounced accumulation Ag(0) single atoms (Ag-SAs) on minerals' surfaces. According spherical aberration-corrected scanning transmission electron microscopy high-energy-resolution X-ray adsorption fine structure analyses, humic acid (HA) phenol (PhOH) can induce Ag-SAs accumulation, whereas oxalic causes only AgNPs deposition. account for more than 20 wt % total γ-Al2O3 surfaces during HA- PhOH-mediated photolysis processes. HA also accumulate two other prevalent soil minerals, SiO2 Fe2O3, fractions are about 15 %. Our mechanism studies suggest phenolic molecule acts as reducing agent stabilizer Ag-SAs, protecting against autocatalytic nucleation.

Язык: Английский

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Characteristics of N Transformation of Humic Acid Urea in Different Circle Layers of the Fertisphere: A Simulated Experiment

Agronomy, Год журнала: 2024, Номер 14(1), С. 223 - 223

Опубликована: Янв. 20, 2024

Due to its broad yield-increasing effect and low cost, humic acid urea (HAU) has become one of the leading modified fertilizers worldwide. The fertisphere is primary space where (U) granules participate in soil nitrogen cycle, forming a nutrient concentration gradient centered on point fertilization. closer circle layers granule fertisphere, higher concentration. However, HAU this microregion remains poorly understood. differences transformation process from inside outside U fertispheres were simulated studied using incubation experiments under 20, 10, 2, 1, 0.2 g kg−1 inputs. 20 10 inputs represent closest granule. Within first seven days, treatment showed concentrations ammonia-N content than within two fertilizer core, while exhibiting lower farthest layers. Under 2 input, nitrate was significantly that treatment, indicating nitrification rate. During 42-day period, mineral for circles. On 42nd day, residual urea-N when input 1 kg−1. preservation supply capacity Fluvo-aquic achieved by changing urease activity rate ranges core. An improved understanding high-efficiency mechanism will contribute development new-generation products.

Язык: Английский

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Protaetia brevitarsis larvae produce frass that can be used as an additive to immobilize Cd and improve fertility in alkaline soils

Journal of Hazardous Materials, Год журнала: 2024, Номер 472, С. 134379 - 134379

Опубликована: Апрель 24, 2024

Язык: Английский

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Potential Of Biochar And Humic Substances For Phytoremediation Of Trace Metals In Oil Sands Process Affected Water

Chemosphere, Год журнала: 2024, Номер 361, С. 142375 - 142375

Опубликована: Май 19, 2024

Oil sands process affected water (OSPW) is produced during bitumen extraction and typically contains high concentrations of trace metals. Constructed wetlands have emerged as a cost effective green technology for the treatment metals in wastewaters. Whether addition amendments to constructed can improve metal removal efficiency unknown. We investigated synergistic effects carbon based wetland plant species arsenic, cadmium, cobalt, chromium, copper, nickel, selenium from OSPW. Three native (Carex aquatilis, Juncus balticus, Scirpus validus) two (canola straw biochar, nano humus) were mesocosms over 60 days. Amendment effect on was not significant, while was. Phytoremediation resulted efficiencies 78.61-96.31 % cobalt. Carex aquatilis had highest all Amendments alone performed well removing some comparable phytoremediation nickel. Metals primarily distributed roots with negligible translocation shoots. Our work provides insights into role plants remediation their complex interactions wetlands.

Язык: Английский

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Surface-loaded magnesium and phosphorus-modified lignite adsorbents: Efficient adsorption and immobilization for remediation of Cd-contaminated water and soil

Environmental Technology & Innovation, Год журнала: 2023, Номер 32, С. 103442 - 103442

Опубликована: Ноя. 1, 2023

Lignite is a resource-rich material with favorable adsorption properties and can be used as an environmentally friendly for removing heavy metals. In this study, we loaded magnesium phosphate ions onto the surface of lignite (LM) by using chemical modification to generate modified materials, Mg-LM P-LM, which were immobilization Cd (II) in polluted water soil. Characterization analysis showed introduction exchangeable Mg enhancement pore structure Mg-LM; increase number oxygenated functional groups and, calcium P content P-LM may favor (II). on was consistent pseudo-secondary kinetics Langmuir isotherm models. The maximum capacity 1033 mg/g 55 mg/g, respectively. reduction soil DTPA-Cd (32.9%) greater under treatment than (20.2 %) LM (11.1 treatments. addition, successive BCR extractions confirmed that promoted transformation unstable fractions stable XRD, FTIR, XPS results indicated electrostatic interactions, ion exchange, complexation precipitation might main mechanisms involved P-LM. Our suggest more suitable remediation Cd-contaminated water, less applicable

Язык: Английский

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Adsorption mechanism and remediation of heavy metals from soil amended with hyperthermophilic composting products: Exploration of waste utilization

Bioresource Technology, Год журнала: 2024, Номер 410, С. 131292 - 131292

Опубликована: Авг. 15, 2024

Язык: Английский

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Biogeochemistry of Actinides: Recent Progress and Perspective

ACS Environmental Au, Год журнала: 2024, Номер 4(6), С. 292 - 306

Опубликована: Ноя. 4, 2024

Actinides are elements that often feared because of their radioactive nature and potentially devastating consequences to humans the environment if not managed properly. As such, chemical interactions with biosphere geochemical environment, i.e., "biogeochemistry," must be studied understood in detail. In this Review, a summary past discoveries recent advances field actinide biogeochemistry is provided particular emphasis on actinides other than thorium uranium (i.e., actinium, neptunium, plutonium, americium, curium, berkelium, californium) as they originate from anthropogenic activities can mobile environment. The nuclear properties isotopes found used research reviewed historical context. Then, coordination chemistry ions contrasted those common metal naturally present typical chelators impact then reviewed. role metalloproteins put into perspective since may have ramifications radiochemistry for long-term management waste. Metalloproteins ubiquitous ligands but, discussed largely been overlooked chemistry, especially when compared traditional environmental chelators. Without discounting importance abundant natural Th

Язык: Английский

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Ultrasound‐Assisted Synthesis of Humic‐Silica Composites by the Isolation of Humic Substances from Peat and Lignite

ChemPlusChem, Год журнала: 2024, Номер 89(6)

Опубликована: Фев. 1, 2024

The aim of the presented study was to evaluate an integrated, direct procedure for synthesis humic-silica composites (HSiC) by isolation humic substances (HS) from peat and lignite use sodium silicate solution as extractant. obtained materials, because presence functional groups, may potentially be used removing contaminants aqueous solutions. quantitative assessment based on experiments designed according Box-Behnken plan. statistical analysis results allowed determine optimal conditions process tested, which efficiency greater than 50 % both raw materials. This made it possible synthesize silica with a high content HS, have been qualitatively evaluated. step focused structure using elemental analysis, spectroscopic methods, differential thermal coupled thermogravimetry. On basis them, structures characteristic HS in HSiC tested observed. Moreover, pointed higher stability synthesized compounds, compared isolated traditional

Язык: Английский

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Integrating bioprocess and metagenomics studies to enhance humic acid production from rice straw

World Journal of Microbiology and Biotechnology, Год журнала: 2024, Номер 40(6)

Опубликована: Апрель 17, 2024

Язык: Английский

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