When I read river sediment, first thoughts, heavy metals, is this a safe soil amendment?
Have not researched it thoroughly, but I ran across this study.
Cultivation of garden vegetables in Peoria Pool sediments from the Illinois River: A case study in trace element accumulation and dietary exposures
The results from this study suggest that this reclaimed sediment can be utilized for the production of vegetables intended for human consumption. The results from this case study also suggest that sediment material with similar physicochemical characteristics and elemental concentrations that fall within the pertinent regulatory guidelines should also be a suitable and safe medium for vegetable production
The rest is [url=https://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V7X-4JVTBTM-4&_user=10&_coverDate=08%2F31%2F2006&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_searchStrId=1431312915&_rerunOrigin=google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=a6bf56ea21901f3feac893d1d157ed67]here[/url]