Table 4.

The top 10 most-cited references.

Citation Count	Title	First Author	Year	Source	Cluster #
154	Treatment of Inorganic Contaminants using Permeable Reactive Barriers	Davie W. Blowes	2000	Journal of Contaminant Hydrology	10
144	Enhanced Degradation of Halogenated Aliphatics by Zero-Valent Iron	Robert W. Gillham	1994	Ground Water	18
135	Reductive Dehalogenation of Chlorinated Methanes by Iron Metal	Leah J. Matheson	1994	Environmental Science and Technology	7
130	Nanoscale Iron Particles for Environmental Remediation: An Overview	Wei-Xian Zhang	2003	Journal of Nanoparticle Research	4
130	Long-Term Performance of Zero-Valent Iron Permeable Reactive Barriers: A Critical Review	Andrew D. Henderson	2007	Environmental Engineer Science	3
122	Long-Term Performance of an in situ “Iron Wall” for Remediation of VOCs	Stephanie F. O’Hannesin	1998	Ground Water	7
105	Biogeochemical Dynamics in Zero-Valent Iron Columns Implications for Permeable Reactive Barriers	B. Gu	1999	Environmental Science and Technology	10
99	Colloid Transport in Geochemically Heterogeneous Porous Media Modeling and Measurements	Philip R. Johnson	1996	Environmental Science and Technology	7
99	The Use of Zero-Valent Iron for Groundwater Remediation and Wastewater Treatment: A Review	Fenglian Fu	2014	Journal of Hazardous Materials	2
97	Use of Iron-Based Technologies in Contaminated Land and Groundwater Remediation: A Review	Andrew B. Cundy	2008	Science of the Total Environment	3