Chemometrics Applied in the Development of a Water Quality Indicator System for the Brazilian Amazon

Costa, Hemilton Cardoso da; Pereira, Simone de Fátima Pinheiro; Santos, Luciana Pinheiro; Oliveira, Augusto Fernando Souza de; Silva, Thiago de Melo e; Silva, Cléber Silva e; Rocha, Rossineide Martins da; Freitas, Kellen Heloizy Garcia; Santos, Davis Castro dos; Cruz, Erivan Sousa

doi:10.1021/acsomega.0c03430

Cited by 2 publications

(2 citation statements)

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“…Value judgment is an activity that unifies objectivity and subjectivity, including the needs and desires of the evaluator's subject. Subjectivity refers to the conclusion of the evaluation and the evaluator's own understanding of how things "should be" [6].…”

Section: Policy Evaluationmentioning

confidence: 99%

Educational Policy Formulation Based on Blockchain Technology

Hu¹,

Chen²

2022

Proceedings of the 2022 2nd International Conference on Education, Information Management and Service Science (EIMSS 2022)

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The inherent decentralization and security properties of blockchain make it well suited to address today's educational decision-making challenges. The educational policy evaluation index system is built on the basis of blockchain technology. The purpose of this paper is to study and implement educational policy formulation based on blockchain technology, and to systematically analyze the theoretical basis for educational policy formulation and evaluation using blockchain technology-related theories, combined with normative research, comparative research, and empirical research methods. This paper analyzes the process of educational policy formulation, designs an educational policy evaluation model, and provides a systematic and standardized management method for educational policy formulation and evaluation. The indicator weight calculation results show that the policy effect accounts for 43%, the policy effect accounts for 23%, and the policy effect accounts for 25%. In addition, taking the education policy of M province as an example, to verify the scientificity and operability of the education policy evaluation model established in this paper, the results show that the actual effective rate of the province's education policy is 63.56%, and the overall result is "average". It belongs to the middle and lower classes, which is in line with the actual situation.

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Section: Policy Evaluationmentioning

confidence: 99%

Educational Policy Formulation Based on Blockchain Technology

Hu¹,

Chen²

2022

Proceedings of the 2022 2nd International Conference on Education, Information Management and Service Science (EIMSS 2022)

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“…[60] Bottom-up approaches have been widely widespread for not presenting some disadvantages like expensive chemical products, complex equipment, skilled labor, and being extremely timeconsuming. [61,62] Nowadays it is crucial to use heteroatomic surface doping in CDs synthesis, especially with nitrogen and sulfur sources, due to their valuable contribution to the quantum yield (QY) of the particle. [52,63] Although few works have shown concerns about carbon and nitrogen/sulfur/boron/phosphorus stoichiometric parameters during synthesis or studies that analyze physical parameters like temperature and time of reaction.…”

Section: Introductionmentioning

confidence: 99%

Bottom‐Up Synthesis Optimization Through The Design Of Experiments Using Blue N,S‐Carbon Dots With Interesting Affinity For Potentially Toxic Elements

Silva de Araújo,

Costa Ferrer,

Seagesser Santos

et al. 2023

ChemistrySelect

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Water contamination by heavy metals is a global issue for environmental safety and new technologies have been developed aim to evaluate the contamination, mainly by anthropogenic action. In this work, we synthesized blue light‐emitting carbon dots (CDs) from ionic sources for sensing applications of heavy metal cations in an aqueous solution. Spectroscopic and morphologic characteristics of the CDs were performed using Fourier transform infrared (FTIR) spectroscopy, fluorescence, and absorption techniques, besides transmission electron microscopy (TEM), dynamic light scattering (DLS), and zeta potential (ZP) measurements. Moreover, a two‐level full factorial design of experiments (DOE) was carried out to achieve the best hydrothermal parameters of synthesis, including the number of mols of precursors, temperature, and reaction time. The pH and buffer nature were evaluated for the quantification step to improve the N,S‐CDs response. We have obtained a range of 2.23–8.57 μmol L−1 (among Bi3+, Cd2+, Hg22+, Hg2+, Pb2+, and Sb3+) in terms of limit of detection (LOD). These aspects frame the material as a potential sensor for the identification of heavy metals in water.

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Chemometrics Applied in the Development of a Water Quality Indicator System for the Brazilian Amazon

Cited by 2 publications

References 30 publications

Educational Policy Formulation Based on Blockchain Technology

Educational Policy Formulation Based on Blockchain Technology

Bottom‐Up Synthesis Optimization Through The Design Of Experiments Using Blue N,S‐Carbon Dots With Interesting Affinity For Potentially Toxic Elements

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