C. Okujeni

409 total citations
18 papers, 312 citations indexed

About

C. Okujeni is a scholar working on Civil and Structural Engineering, Artificial Intelligence and Environmental Chemistry. According to data from OpenAlex, C. Okujeni has authored 18 papers receiving a total of 312 indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Civil and Structural Engineering, 9 papers in Artificial Intelligence and 8 papers in Environmental Chemistry. Recurrent topics in C. Okujeni's work include Geochemistry and Geologic Mapping (9 papers), Tailings Management and Properties (8 papers) and Mine drainage and remediation techniques (8 papers). C. Okujeni is often cited by papers focused on Geochemistry and Geologic Mapping (9 papers), Tailings Management and Properties (8 papers) and Mine drainage and remediation techniques (8 papers). C. Okujeni collaborates with scholars based in South Africa and Nigeria. C. Okujeni's co-authors include Wilson M. Gitari, Leslie Petrik, David L. Key, O. Etchebers, Emmanuel I. Iwuoha, Arno Mücke, Chang-Hong Wu, Dirk Frei and Godfrey Madzivire and has published in prestigious journals such as Fuel, Environmental Earth Sciences and Journal of Geochemical Exploration.

In The Last Decade

C. Okujeni

17 papers receiving 292 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
C. Okujeni South Africa 6 204 145 120 64 53 18 312
Lianna J.D. Smith Canada 8 202 1.0× 62 0.4× 94 0.8× 42 0.7× 53 1.0× 17 316
O. Etchebers South Africa 6 244 1.2× 161 1.1× 140 1.2× 68 1.1× 60 1.1× 8 319
Jeff Bain Canada 10 239 1.2× 79 0.5× 80 0.7× 49 0.8× 88 1.7× 21 351
Brenda L. Bailey Canada 7 248 1.2× 60 0.4× 116 1.0× 56 0.9× 78 1.5× 13 349
Dino Quispe Spain 8 131 0.6× 137 0.9× 58 0.5× 80 1.3× 79 1.5× 9 358
Viswanath R.K. Vadapalli South Africa 10 181 0.9× 127 0.9× 143 1.2× 92 1.4× 67 1.3× 19 333
D. Trumm New Zealand 11 315 1.5× 89 0.6× 129 1.1× 85 1.3× 111 2.1× 26 364
Pablo Cruz‐Hernández Spain 10 169 0.8× 72 0.5× 74 0.6× 41 0.6× 57 1.1× 15 374
Ricardo Millán-Becerro Spain 10 132 0.6× 100 0.7× 85 0.7× 53 0.8× 34 0.6× 17 360
Pawit Tangviroon Japan 9 226 1.1× 97 0.7× 67 0.6× 71 1.1× 103 1.9× 12 369

Countries citing papers authored by C. Okujeni

Since Specialization
Citations

This map shows the geographic impact of C. Okujeni's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by C. Okujeni with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites C. Okujeni more than expected).

Fields of papers citing papers by C. Okujeni

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by C. Okujeni. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by C. Okujeni. The network helps show where C. Okujeni may publish in the future.

Co-authorship network of co-authors of C. Okujeni

This figure shows the co-authorship network connecting the top 25 collaborators of C. Okujeni. A scholar is included among the top collaborators of C. Okujeni based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with C. Okujeni. C. Okujeni is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

18 of 18 papers shown
1.
Okujeni, C., et al.. (2020). The use of factor analysis and acid base accounting to probe the speciation of toxic metals in gold mine waste. Environmental Earth Sciences. 79(6). 1 indexed citations
2.
3.
Okujeni, C., et al.. (2016). Distribution patterns of contaminants in the Mogale Gold tailing dam: a case study from South Africa. Environmental Earth Sciences. 75(20). 5 indexed citations
4.
Gitari, Wilson M., Leslie Petrik, David L. Key, & C. Okujeni. (2013). Inorganic contaminants attenuation in acid mine drainage by fly ash and its derivatives: column experiments. International Journal of Environment and Pollution. 51(1/2). 32–32. 7 indexed citations
5.
Gitari, Wilson M., Leslie Petrik, David L. Key, & C. Okujeni. (2010). Interaction of acid mine drainage with Ordinary Portland Cement blended solid residues generated from active treatment of acid mine drainage with coal fly ash. Journal of Environmental Science and Health Part A. 46(2). 117–137. 4 indexed citations
6.
Gitari, Wilson M., Leslie Petrik, David L. Key, & C. Okujeni. (2010). Partitioning of major and trace inorganic contaminants in fly ash acid mine drainage derived solid residues. International Journal of Environmental Science and Technology. 7(3). 519–534. 18 indexed citations
7.
Gitari, Wilson M., Leslie Petrik, O. Etchebers, David L. Key, & C. Okujeni. (2008). Utilization of fly ash for treatment of coal mines wastewater: Solubility controls on major inorganic contaminants. Fuel. 87(12). 2450–2462. 87 indexed citations
8.
Gitari, Wilson M., Leslie Petrik, O. Etchebers, et al.. (2007). Passive neutralisation of acid mine drainage by fly ash and its derivatives: A column leaching study. Fuel. 87(8-9). 1637–1650. 60 indexed citations
9.
Gitari, Wilson M., Leslie Petrik, O. Etchebers, et al.. (2006). Treatment of Acid Mine Drainage with Fly Ash: Removal of Major Contaminants and Trace Elements. Journal of Environmental Science and Health Part A. 41(8). 1729–1747. 97 indexed citations
10.
Okujeni, C., et al.. (2005). Controls of element dispersion in aeolian sand and calcrete-dominated regolith associated with gold mineralization in the Kraaipan greenstone belt, South Africa. Geochemistry Exploration Environment Analysis. 5(3). 223–231. 2 indexed citations
11.
Okujeni, C., et al.. (1999). Multielement Geochemistry of Uranium Ores from North Eastern Nigeria. Discovery and Innovation. 11(3). 1 indexed citations
12.
Okujeni, C., et al.. (1994). The use of U/TH ratios and REE pattern in savannah trees as a guide to uranium mineralisation in the Benue Trough, Nigeria. Discovery and Innovation. 6(2). 152–156. 1 indexed citations
13.
Okujeni, C., et al.. (1994). Geochemical and gamma spectrometric analysis of ores and hostrocks of the Kanawa uranium occurrence in NE Nigeria. Journal of Radioanalytical and Nuclear Chemistry. 178(2). 375–385. 5 indexed citations
14.
Okujeni, C., et al.. (1994). Distribution pattern of REE and other elements in the host rocks of the Gubrunde uranium occurrence, NE Nigeria. Journal of Radioanalytical and Nuclear Chemistry. 178(2). 365–373. 5 indexed citations
15.
Okujeni, C., et al.. (1993). Instrumental neutron activation analysis of some rock samples from Akwana and Arufu areas, Middle Benue Trough, Nigeria. Journal of Radioanalytical and Nuclear Chemistry. 168(1). 101–106. 2 indexed citations
16.
Okujeni, C., et al.. (1991). Instrumental neutron activation analysis of limestone and associated calcite samples from Abakaliki, lower Benue Trough, Nigeria. Journal of Radioanalytical and Nuclear Chemistry. 148(1). 145–153. 5 indexed citations
17.
Okujeni, C., et al.. (1990). Rare earth elements (REE) distribution in pyroclastics and associated calcite of abakaliki, Lower Benue Trough, Nigeria. Discovery and Innovation. 2(2). 48–52.
18.
Mücke, Arno & C. Okujeni. (1984). Geological and ore microscopic evidence on the epigenetic origin of the manganese occurrences in northern Nigeria. Journal of African Earth Sciences (1983). 2(3). 209–225. 9 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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2026