If you removed a number of SharePoint list items (moved to Recycle Bin), I think you want to clean the Recycle from them. Of course you can remove them manually but it’s not a good idea if you have deleted 10000 records or more (Remove a lot of elements from very large SharePoint Lists).

The script below will help you to clean SharePoint Recycle from deleted items. The script is a bit raw but I think it’s not a problem to make it better. My result was enough for me.

#Author: Alexey Beliaeff
#URL: https://markimarta.com

If ((Get-PSSnapIn -Name Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue) -eq $null )  
{ Add-PSSnapIn -Name Microsoft.SharePoint.PowerShell } 
$host.Runspace.ThreadOptions = "ReuseThread" 
function RemoveItemsFromSPRecycleBin 
    param ($sSiteCollection,$sOperationType,$sUser) 
        $spSite=Get-SPSite -Identity $sSiteCollection 
        $SPRecycleBinItemCollection  = $spSite.RecycleBin;

       #$spSite.RecycleBin | Where {$_.DirName -match "site_url_mask" } | sort DirName | select Title, ItemType, DirName, ItemState  
       $vars = $SPRecycleBinItemCollection | Where {$_.DirName -match "site_url_mask" } 
$nowtime = Get-Date
Write-Host $nowtime
Write-Host $vars.Count
        for($i = $vars.Count-1; $i -ge 0; $i--) {

$nowtime = Get-Date
Write-Host $nowtime       

    catch [System.Exception] 
        write-host -f red $_.Exception.ToString() 
Start-SPAssignment –Global 
#Calling the function 
RemoveItemsFromSPRecycleBin -sSiteCollection $sSiteCollection 

Stop-SPAssignment –Global 
#Remove-PSSnapin Microsoft.SharePoint.PowerShell