STM4663 Chapter2.4 ASK

What is chemical precipitation used for in industrial waste disposal?

• To adjust the pH of the waste

• To remove dissolved metals from the waste

• To stabilize and solidify the waste

• To inject liquid waste into deep wells

Which of the following substances can be used as alkaline agents in chemical precipitation?

• Lime and caustic soda

• Sodium bisulfate and cyanide

• Zinc sulfate and ferrous sulfate

• Calcium carbonate and metals

What is the purpose of stabilization and solidification in industrial waste disposal?

• To destroy the contaminants

• To prevent the release of harmful chemicals

• To inject liquid waste into deep wells

• To produce energy from the waste

Which of the following is a common binding agent used in solidification?

• Cement

• Asphalt

• Fly ash

• Clay

Fakta Tasik Kenyir

• Tasik buatan manusia

• Tasik semulajadi

• Lokasi di Hulu Terengganu

• Lokasi di Hulu Langat

What is the main advantage of deep-well injection for liquid waste disposal?

• Low cost

• No pretreatment required

• Suitable for all locations

• Prevents subsurface water pollution

Difference between incineration of hazardous organic wastes (HOW) and municipal solid waste (MSW) incineration?

• HOW produce energy

• MSW incineration is more expensive

• HOW require detoxification

• MSW incineration destroys all scheduled waste

Apa itu virus?

• sejenis parasit

• boleh dirawat dengan antibiotik

• sejenis mamalia

• dia comel kiut miut

Problem associated with hazardous-waste incineration?

• Air pollution

• High operating expenses

• Low waste minimization

• Detoxification of waste

Features of a secured landfill for industrial waste disposal?

• Double-layered non-porous lining, leak protection system, and wind dispersal controls

• Continuous dumping of waste without covering

• Monitoring sensors to prevent ground contamination

• Disposal of solidified hazardous wastes only