Solid acid alchlor catalyst was prepared from anhydrous aluminium trichloride through liquid solid solvent method,with pretreated bentonite as support.
The U.S. government says food accounts for more than 21 percent of solid waste.
「After paper products, what accounts for the largest category of U.S. solid waste? Food, plastics, yard trimmings, or metals? 」在美国,除了纸制品以外,最多的固体垃圾类什么?食品、塑料、庭院装饰还金属?美国政府表示,食物占固体垃圾的21%以上。