Many　soil　amendments　have　been　proposed　to　exclusively　enhance　the　removal　of　hydrogen　sulphide　(H　2　S;　one　of　the　major　odorous　gas)　and　reduce　water　percolation/landfill　gas　emission　in　a　municipal　solid　waste　landfill.　There　is　no　reported　data　about　any　single　amendment　that　can　simultaneously　reduce　(i)　gas　permeability　(k　g　)　and　saturated　water　permeability　(k　w　)　and　(ii)　H　2　S　emission.　The　present　study　investigated　the　possible　use　of　nano-activated　carbon　to　amend　the　physico-chemical　properties　of　kaolin,　including　k　w　,　k　g　and　H　2　S　adsorption　capacity.　It　was　revealed　that　adding　nano-activated　carbon　of　6%　(by　mass)　could　reduce　k　w　and　k　g　by　about　60%　and　more　than　an　order　of　magnitude,　respectively,　while　increasing　the　H　2　S　adsorption　capacity　by　more　than　four　times.　©　2019　Elsevier　B.V.