نزح المياه من منجم الفحم
millscale flyash المشترين اندونيسيا الأثر البيئي لاستخدام الفحم Coal and coal waste products including fly ash bottom ash and boiler slag releases approximately 20 toxicrelease chemicals including arsenic lead mercury nickel vanadium beryllium cadmium barium chromium copper molybdenum zinc selenium and radium which are dangerous if