KIBU2020-05-222020-05-222018-08-08http://erepository.kibu.ac.ke/handle/123456789/2067SCH 350: Environmental chemistryenAttribution-NonCommercial-ShareAlike 3.0 United Stateshttp://creativecommons.org/licenses/by-nc-sa/3.0/us/SCH 350: Environmental chemistryOther