This volume discusses: (1) the treatment of hazardous sludge, wastewater, textile effluent, contaminated groundwater, laboratory waste, toxic dye, heavy metals, acid mine drainage and palm oil effluent, (2) the technologies of stabilization, solidification, natural coagulation-flocculation, river catchment control and mitigation, dredging and mining operations, and (3) the management of acid mines, laboratories, nano pollutants and plant effluents.