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 2022-05-01 to 2026-05-01.)

Article	Citations
Issue Information ‐ Info for Authors	115
Bioclogging effects on mass transport using volume averaging method in bioretention cell treating wastewater: Theories	96
Resources for renewable natural gas: A Hawaii case study	58
Effect of substituting water source on the methane production from lignocellulosic biowaste during anaerobic digestion	53
Evaluation and optimization of engine performance and exhaust emissions of a diesel engine fueled with diestrol blends	40
A comprehensive review of coffee waste based adsorbents for the sequestration of different water contaminants	37
Experimental research on transforming different functional thresholds to improve double slope solar still productivity	37
Cultivation of aerobic granular biomass in continuous flow‐intermittent decant type reactor fed with anaerobic effluent	36
Innovative study for enhanced performance of the photogalvanic cells for solar energy conversion and storage	33
Enhanced prediction of Cs removal by CST from Hanford tank waste with K accountability	32
A bibliometric review on green hydrogen as an alternative for combined generation systems	31
Design and fast uptake of fluoride using hybrid biopolymers encapsulated magnetic hydroxyapatite beads	30
Pedestrians' perceptions of different heat mitigation strategies for an urban river valley in Iran: Coupling a questionnaire survey with microclimate modeling	30
Effect of calcium hydroxide on the characteristics of volatile organic compounds emission during sewage sludge incineration	29
Experimental investigation of pyramid solar still performance enhanced by natural and volcanic pebbles‐based thermal storage	29
Photoactivation of nano MgO anchored g‐C₃N₄ enhances biodiesel production in Chlorella sorokiniana: A sustainable approach	29
MCDM approaches in BIM ‐driven decision‐making models in enhancing energy efficiency for sustainable	28
Flame and flow structure of premixed hydrogen/air combustion under different inlet flow rates	28
A critical review on carbon materials from oil sludges: Activation, application and future prospects	28
Activation of persulfate by iron‐loaded soybean straw biochar for efficient degradation of dye contaminants: Synthesis, performance, and mechanism	28
Sustainable thermal energy storage in a cylindrical solar pond with calcium chloride stratification	27
The effect of surfactant on biosolubilization of weathered coal	25
Navigating the complexities of advanced recycling: Processes, feedstock, and public health connections in the context of the global plastic pollution crisis	24
Comprehensive environmental and economic analysis of active‐mode greenhouse solar dryers for green peas processing	23
Preparation of carbon dioxide‐adsorbing materials from fly ash‐modified steel slag and their performance optimization	23