scispace - formally typeset
Search or ask a question
Topic

Water environment

About: Water environment is a research topic. Over the lifetime, 13384 publications have been published within this topic receiving 125138 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the DFT method was used to perform a hydration study of both Cu+ and Cu2+ cations in variable water environment and the stabilization energies with and without ligand repulsion were calculated using B3PW91 functional.
Abstract: Hydration study of both Cu+ and Cu2+ cations in variable water environment was performed using the DFT method. After optimization using B3PW91 functional, stabilization energies with and without ligand repulsion were calculated using B3LYP functional. It was found that optimal Cu+ coordination involves two directly bonded solvent molecules while Cu2+ cation prefers 4 (or 5) coordinated waters in the first solvation shell. Higher coordination corresponds to lower stabilization energies. Morokuma's energy decomposition (for Cu+ complexes only) was used to elucidate bonding characteristics in detail. NBO partial charges and MO's analyses support the explanation for these energy results.

64 citations

Journal Article
TL;DR: The single factor water quality identification index (SQI index) as mentioned in this paper is a new tool for single water quality factor assessment of surface water, which can completely identify the important information including water quality classification of assessed factors, water quality monitoring data, and water environment function area.
Abstract: The single factor water quality identification index,which is a new tool for single water quality factor assessment of surface water,is presented.The characteristics of single factor water quality identification index are:Firstly,it can completely identify the important information including water quality classification of assessed factors,water quality monitoring data,planned water quality classification of water environment function area;secondly,it can evaluate the selected factors qualitatively by national water quality standards,and water quality monitoring data;thirdly,it can be used to compare water quality of the same assessed factors in the same classification and water quality of different assessed factors.

64 citations

Journal ArticleDOI
TL;DR: In this paper, the authors quantified the matrix effect of external calibration procedures for quantification of the total H2O content (H2OT = O(OH−++H2Om) in natural silicate glasses, based on the calibration of either the absolute (external calibration) or scaled (parameterisation) intensity of the 3550 cm−1 band.

64 citations

Journal ArticleDOI
TL;DR: This work develops plasmonically-active TERS probes with a multilayer metal coating structure that can be successfully used within a liquid environment and demonstrates TERS imaging with nanoscale spatial resolution in a water environment for the first time by employing single-wall carbon nanotubes as a model sample.
Abstract: Tip-enhanced Raman spectroscopy (TERS) is a powerful tool for non-destructive and label-free surface molecular mapping at the nanoscale. However, to date nanoscale resolution chemical imaging in a liquid environment has not been possible, in part due to the lack of robust TERS probes that are stable when immersed in a liquid. In this work, we have addressed this challenge by developing plasmonically-active TERS probes with a multilayer metal coating structure that can be successfully used within a liquid environment. Using these novel TERS probes, we have compared the plasmonic enhancement of TERS signals in air and water environments for both gap mode and non-gap mode configurations and show that in both cases the plasmonic enhancement decreases in water. To better understand the signal attenuation in water, we have performed numerical simulations that revealed a negative correlation between the electric field enhancement at the TERS probe-apex and the refractive index of the surrounding medium. Finally, using these robust probes we demonstrate TERS imaging with nanoscale spatial resolution in a water environment for the first time by employing single-wall carbon nanotubes as a model sample. Our findings are expected to broaden the scope of TERS to a range of scientific disciplines in which nanostructured solid-liquid interfaces play a key role.

64 citations

Journal ArticleDOI
TL;DR: The physico-chemical changes such as reduction in pH and salinity in water environment induced by land reclamation appear to be responsible for metal mobility in the sediment-groundwater system.

64 citations


Network Information
Related Topics (5)
Environmental pollution
100.4K papers, 1.1M citations
80% related
Sustainable development
101.4K papers, 1.5M citations
78% related
Wastewater
92.5K papers, 1.2M citations
77% related
Agriculture
80.8K papers, 1.3M citations
73% related
Ecosystem
25.4K papers, 1.2M citations
71% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202239
2021932
2020869
2019980
20181,015
2017916