Remediation of Chlorinated Alkanes by Vitamin B₁₂ and Zero-Valent Iron

Table 1

Summary of environmental risks of chlorinated alkanes.

Compound	Notes
1,2,3-TCP	(i) No defined maximum contaminant level (MCL) but California has a notification level of 0.005 ppb; (ii) Has been detected in more than 300 drinking wells in California at concentrations that exceed the notification level [8]
1,2-DCP	(i) MCL of 5 ppb; (ii) Contaminant of concern at over 100 superfund sites; (iii) Has been found at concentrations exceeding 24 parts per million (ppm) at well sites in Louisiana [9]
1,2-DCA	(i) MCL of 5 ppb; (ii) Of the 1,585 national priorities list (NPL) sites, 1,2-DCA has been detected in at least 570 locations [10]; (iii) Recalcitrant to abiotic destruction in the presence of ZVI or bimetallic systems [11]