Abstract: Disclosed is a process for pretreatment of hydrocarbon feed containing sulfur and nitrogen compounds and aromatics prior to hydrocracking or fluid catalytic cracking which comprises:contacting said feedstock with a sulfided catalyst comprising a metal of non-noble Group VIII and Group VIB, and, optionally one or more elements selected from Group IIIA and Group VA of the Periodic Table on a carbon support consisting essentially of activated carbon, optionally on a carbon support treated with phosphorus, having a B.E.T. (Braunauer-Emmett Teller) surface area of at least 100 m.sup.2 /g and an average Pore Diameter greater than 12.ANG. and a Total Pore Volume greater than 0.3 cc/g.

Abstract: Ground water which contains heavy metal ions and toxic volatile organic compounds is purified by passing an air stream through it to purge out the organic compounds, adsorbing the displaced organic compounds on a molecular sieve and destroying them using a strong oxidizing agent such as hydrogen peroxide. This procedure avoids having the heavy metal ions from the water collect on the molecular sieve which causes the destruction of the oxidizing agent.

Abstract: In the process for removing organic impurity constituents from aqueous media by adsorbing same on an organophilic molecular sieve adsorbent, followed by regeneration of the adsorbent by contact with an oxidant, such as hydrogen peroxide, whereby the organic adsorbate is converted to innocuous materials, principally CO.sub.2 and H.sub.2 O, the efficiency of the regeneration operation is found to be substantially improved by decreasing the pH of the regenerating medium and/or increasing the number of Bronsted acid sites in the molecular sieve adsorbent.