Organic Carbon and Other Elements in Suspended Solids in Surface Water and Relations between Total Organic Carbon and BOD etc. at the Rivers in Kawasaki

Abstract

Organic carbon in suspended solid (SSOC) in urban surface water in Kawasaki was measured with the use of elemental analyzer. Through this method was in particular examined SSOC concentration on it and relationships between total organic carbon (TOC) and other items as well.
SSOC mean concentration in urban surface water was 8.4mg·l^-1, and mean content of SSOC in TOC (SSOC plus dissolved organic carbon) was 47.9%. Variation of biochemical oxygen demand (BOD) concentration at relatively polluted point was much dependant on SSOC concentration. Carbon, hydrogen and nitrogen in suspended solid were thought to compose organics, to which mean composition ratio of C: H : N was 1: 2: 0.15.
TOC, BOD and COD were highly correlated.