Question

1. ______ is a critical process for non-reverse osmosis purification. it is usually coupled with biologic activated carbon filtration. the process reduces toc and trace chemical pollutants, removes protozoans, kills viruses, and is a flocculation aid. it is an oxidation process used as a disinfection and oxidant prior to biologic activated carbon filtration.

a. ozone
b. chloramination
c. ultraviolet light
d. chlorine dioxide

1. which of the listed factors does not have an influence on the disinfection of water with chlorine?

a. ph,
b. reducing agents
c. hardness
d. temperature

Explanation:

1. Ozone is an oxidation/disinfection process paired with biological activated carbon filtration for non-RO water treatment; it reduces TOC, removes protozoa, kills viruses, and acts as a flocculation aid, matching the described traits.
2. Chlorine disinfection efficacy is affected by pH (alters chlorine species), reducing agents (react with chlorine), and temperature (affects reaction rate). Water hardness (mineral content) does not impact this disinfection process.

Answer:

1. a. Ozone
2. c. Hardness