In this study cement and quicklime are examined as binders to enhance the ripening process and immobilize contaminants in dredging sludge. Ripening comprises the drying in the open air till a dry matter content of 50-55% is reached. For this study, a dredging sludge of the highest contamination category was used. The binders speed up the ripening process substantially since the binders as such ...

Fecal coliform concentrations increased significantly (F test) in the immediate vicinity of a maintenance dredging operation in the Mississippi River navigation channel. Increased counts were attributed to the disturbance and relocation of bottom sediments by dredging and a concomitant release of sediment-bound fecal coliforms.

http://bmj.com/cgi/content/full/325/7378/1437 Updated information and services can be found at: These include: Data supplement http://bmj.com/cgi/content/full/325/7378/1437/DC1 "Figures" References http://bmj.com/cgi/content/full/325/7378/1437#otherarticles 26 online articles that cite this article can be accessed at: http://bmj.com/cgi/content/full/325/7378/1437#BIBL This article cites 11 arti...

Suppose there is a given data set and there are a huge number of hypotheses [1] about this data set [2]. If the data is totally random, then say all the hypotheses are actually false. However, owing to the sheer number of hypotheses on a limited data set, it is possible to see some very highly correlated [3] data that are statistically significant [4]. In such cases, data dredging is said to ha...

The concentrations of selected trace metals, organotins, polychlorinated biphenyls (PCBs), and polycyclic aromatic hydrocarbons (PAHs) were determined in caged blue mussels (Mytilus edulis) during dredging operations in the Göta Älv Estuary (SW Sweden). Maximum values of pollutants in mussel tissues were found after the dredging started. Our results showed that the dredging caused mobilization ...

If in sampling any class, say theM's, we first decide what the character Pis for which we propose to sample that class, and also how many instances we propose to draw, our inference is really made before these latter are drawn, that the proportion of P's in the whole class is probably about the same as among the instances that are to be drawn .... But suppose we were to draw our inferences with...

A workshop sponsored by the U.S. Army Corps of Engineers and the U.S. Environmental Protection Agency was held at the U.S. Army Engineer Research and Development Center, Waterways Experiment Station, in Vicksburg, MS, in April of 2006. Fifty experts from government, the private sector, and academia participated in the workshop, which focused on four issues (the four Rs) relevant to environmenta...

BACKGROUND: Public laws regulating dredged material disposal (Section 404 of the Clean Water Act and Section 103 of the Ocean Dumping Act) require ecological evaluation prior to the permitting of operations. Assessment of the potential for bioaccumulation of chemical contaminants in sediment, including heavy metals, is required as part of the evaluation process. Metals can represent significant...