Table 1.

Chemical analysis of waste landfill leachate and LC50.

Chemical	Landfill leachate (ppm)		LC50 of Daphnia magna
	2008	2009	(literature values) (ppm)
NO3 −	N.D.	N.D.	3581 [16]
SO4 2−	17.7	2530	2560 [16]
Na+	1760	3130	3310 [16]
NH4 +	334	361	25.7
K+	102	380	337 [16]
TOC	147	152	—
Cu	2.25 × 10−5	3.48 × 10−2	5.73×10−2 [17]
Zn	N.D.	4.73 × 10−2	3.34×10−1 [18]
Ni	N.D.	5.64 × 10−2	1.66×10−1 [18]
Pb	3.19 × 10−2	3.70 × 10−2	4.97 [19]
Bisphenol A	16.3	14.8	15.2
pH	8.3 (±0.3)	7.7 (±0.1)	—

N.D. = not detected: detection limits of NO₃ ⁻, Zn, and Ni were 0.038 ppm, 0.004 ppm, and 0.006 ppm ([16] Dowden and Benette 1965. [17] Naddy, et al. 2002. [18] Chapman, et al. 1980. [19] Elten-Unal, et al. 1998.)