Since most anion exchange resins have a higher selectivity for sulfate than nitrate, the level of sulfate in the water is an important factor in the efficiency of an ion exchange system for removing nitrates. All of the methods described here for the removal of nitrate are relatively expensive.
Simpson was found guilty in 2008 in a Nevada robbery and kidnapping case and was sentenced to 33 years in prison. He is eligible for parole in October 2017. Simpson is currently serving his sentence at Lovelock Correctional Center in Nevada. Four other men involved in the case were given probation.
The kidnapping charges were dropped in a plea deal and he was sentenced to 10-25 in the medium security prison in Lovelock, Nevada, where he later met OJ in 2008. OJ who was also convicted for armed robbery and kidnapping.