OOIR: Observatory of International Research

Papers

(The H4-Index of Environmental Progress & Sustainable Energy is 23. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-12-01 to 2025-12-01.)

Article	Citations
A bibliometric review on green hydrogen as an alternative for combined generation systems	88
Efficient photocatalytic degradation of emerging pollutants by green synthesized Prussian blue analogue nanocomposite	86
Response surface methodology for optimizing the pulsed spray deposition of Co‐doped Bi₂O₃ photocatalytic thin films	75
Activation of persulfate by iron‐loaded soybean straw biochar for efficient degradation of dye contaminants: Synthesis, performance, and mechanism	70
Bioclogging effects on mass transport using volume averaging method in bioretention cell treating wastewater: Theories	58
Resources for renewable natural gas: A Hawaii case study	55
Cultivation of aerobic granular biomass in continuous flow‐intermittent decant type reactor fed with anaerobic effluent	41
Enhanced prediction of Cs removal by CST from Hanford tank waste with K accountability	34
Effect of substituting water source on the methane production from lignocellulosic biowaste during anaerobic digestion	34
The effect of surfactant on biosolubilization of weathered coal	33
Photoactivation of nano MgO anchored g‐C₃N₄ enhances biodiesel production in Chlorella sorokiniana: A sustainable approach	30
Production and characterization of composite activated carbon from potato peel waste for cyanide removal from aqueous solution	30
Design and fast uptake of fluoride using hybrid biopolymers encapsulated magnetic hydroxyapatite beads	30
Evaluation and optimization of engine performance and exhaust emissions of a diesel engine fueled with diestrol blends	30
Navigating the complexities of advanced recycling: Processes, feedstock, and public health connections in the context of the global plastic pollution crisis	29
Innovative study for enhanced performance of the photogalvanic cells for solar energy conversion and storage	28
Issue Information ‐ Info for Authors	28
Effect of calcium hydroxide on the characteristics of volatile organic compounds emission during sewage sludge incineration	27
Speciation of aluminum phases at the Hanford Site	25
A comprehensive review of nano clay: From development and applications to research opportunities	24
MCDM approaches in BIM ‐driven decision‐making models in enhancing energy efficiency for sustainable	23
Heavy metal pollution level and potential ecological risk assessment of sludge landfill	23
N719 dye as a sensitizer for dye‐sensitized solar cells (DSSCs): A review of its functions and certain rudimentary principles	23