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 AIDWRP, Markov Decision Process (MDP) discusses the dynamic water resource management issue with annual use and released locational constraints that develop sensitivity-driven methods to optimize several efficient environmental planning and management policies.

158 citations

Journal ArticleDOI
TL;DR: In this paper, D35 dye-sensitization was employed to synthesize a novel D35-TiO2/g-C3N4/PS photocatalyst, which has a quasi-full-visible-light harvesting range up to 675 nm.
Abstract: To utilize the excellent charge separation efficiency of the g-C3N4/TiO2 photocatalyst and broaden its narrow visible-light absorption range, D35 dye-sensitization was employed to synthesize a novel D35-TiO2/g-C3N4 photocatalyst. Due to the complementary co-absorption ability of g-C3N4 and the D35 dye, the D35-TiO2/g-C3N4 nano-composite exhibits a quasi-full-visible-light harvesting range up to 675 nm, and the simultaneous electron injection from the D35 and g-C3N4 to TiO2 synergistically activates persulfate (PS) to produce the active oxidizing species more efficiently. In the D35-TiO2/g-C3N4/PS photocatalytic system, 10 mg/L bis-phenol A (100 mL) could be completely removed in only 15 min with 0.5 g/L photocatalyst and 2 mM PS under visible-light illumination (λ > 400 nm); meanwhile, nearly 50% of BPA was mineralized into nontoxic substances. Radical quenching experiments and electron paramagnetic resonance (EPR) spectra revealed that OH, SO4 −, O2- and h+ all contributed to organics elimination, and the radical process was the main degradation pathway. The efficient photodegradation of other typical micropollutants, such as caffeine, phenol, acetaminophen and methylene blue, indicating that the D35-TiO2/g-C3N4/PS photocatalytic system has a strong non-selective oxidative ability to remove micropollutants. Therefore, it has great potential to be applied in water environment remediation.

156 citations

Journal ArticleDOI
TL;DR: In this paper, an amino functionalization of Cr-based MOFs MIL-101 is modified through coordination bonding of unsaturated Cr metal centers with the -NH2 group in ethylenediamine (ED), and the authors demonstrate their excellent performance for the removal of Pb(II) ions from water.
Abstract: Metal organic frameworks (MOFs) have been regarded as robust adsorbents for the adsorptive removal of organic pollutants because of their unique characteristics. However, the application of MOFs in the removal of metals from water is still rare. In this paper, amino-functionalization of Cr-based MOFs MIL-101 are modified through coordination bonding of unsaturated Cr metal centers with the -NH2 group in ethylenediamine (ED), and we demonstrate their excellent performance for the removal of Pb(II) ions from water. The Fourier transform infrared verifies that the ethylenediamine was grafted successfully on MIL-101. Furthermore, the results of X-ray diffraction, scanning electron microscopy, and transmission electron microscopy show that the structure of ED-MIL-101 with an appropriate amount of ED almost does not collapse and retains the original performance of MIL-101. The adsorption capacity of ED-MIL-101, which is more than five times that of MIL-101, is 81.09 mg.g(-1) for Pb(II) ions from aqueous samples. The selectivity coefficients of ED-MIL-101 for Pb(II)/Cu(II), Pb(II)/Zn(II), Pb(II)/Co(II), and Pb(II)/Ni(II) are 6.92, 24.02, 15.69, and 14.53, respectively. The adsorption kinetics of Pb(II) ions shows that the process fits well with a pseudo-second-order model, and the adsorption equilibrium time is only about 30 min. Moreover, the practical application of ED-MIL-101 achieves almost 97.22% removal efficiency for Pb(II) ions. These results indicate that ED-MIL-101 has great potential in selectively removing Pb(II) ions from water environment.

155 citations

Journal ArticleDOI
TL;DR: This work points out the potential and gap areas of likely future research before potential applications based on fungi and algae initiated Acid Mine Drainage remediation can be made on sound understanding.

155 citations

Journal ArticleDOI
TL;DR: Analysis of the adsorption of levofloxacin onto polyvinyl chloride (PVC) in an aqueous solution confirmed that electrostatic interactions, ion exchange, intermolecular hydrogen bonds, and halogen bond cooperation were the main Adsorption mechanisms.

154 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