PREPARATION OF ACTIVATED CARBON FROM PALM OIL SHELL BY CHEMICAL ACTIVATION WITH Na&lt;sub&gt;2&lt;/sub&gt;CO&lt;sub&gt;3&lt;/sub&gt; AND ZnCl&lt;sub&gt;2&lt;/sub&gt; AS IMPRENATED AGENTS FOR H&lt;sub&gt;2&lt;/sub&gt;S ADSORPTION
American journal of environmental sciences