FeSO4 amendments stimulate extensive anaerobic PCB dechlorination

Article Abstract:

A method is suggested for achieving anaerobic microbial reductive dechlorination of PCBs, without being limited to dechlorination of some of the chlorines in the meta positions of biphenyl. The procedure allows the ability to attain nearly complete meta plus para dechlorination of Aroclor 1242, by adding FeSO4 to PCB contaminated sediments. This results in about 90 mol % of the total PCBs being converted to aerobically degradable orth-substituted mono- and dichlorinated congeners. This effective addition of FeSO4 to sediment slurries containing PCB dechlorinating bacteria, to simulate the para dechlorination of PCBs, bolsters the potential to use PCB dehalogenation as a practical and efficient remediation process both ex situ and in situ.

Comment:

Method adds FeSO4 to sediment slurries containing PCB dechlorinating bacteria, to simulate the para dechlorination of PCBs

United States, Waste Management and Remediation Services, Nonmanufacturing technology, Toxic Substances Control, Poisons, Pollution control, Article

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Classification of environmentally occurring chemicals using structural fragments and PLS discriminant analysis

Article Abstract:

Environmentally occurring chemicals were easily classified using the structural information present in their fragments and partial least square (PLS) analysis method. The method was able to characterize the inert and less inert chemicals and the reactive and specifically acting chemicals. One distinct advantage of the PLS method is its ability to characterize several thousands of compounds in less than an hour.

All Other Miscellaneous Chemical Product and Preparation Manufacturing, Analytical Laboratory Instrument Manufacturing, Chemical preparations, not elsewhere classified, Analytical instruments, Chemicals NEC, Research, Evaluation, Chemicals, Chemical detectors

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