Table 2.

Identification of residual organic pollutants by GC-MS from TMS derivatized DCM extract from pulp and paper industry effluent sludge discharge after secondary treatment.

Before phytoextraction	RT	Compounds	% similarity with NIST	Toxicity
	6.06	2-Pentadecanone	75	Hazardous to the aquatic environment, long-term hazard
	10.27	Nonacosane	94	Oral, dermal and inhalation toxicity
	21.91	Benzene Propanoic acid, tert-butyldimethylsilyl ester	59	Genotoxicity
	25.53	Octadecanoic acid, TMS	92	Endocrine disrupting chemicals (EDCs)
	28.10	Tetradecanoic methyl ester	95	EDCs, genotoxicity
	31.82	Heptacosane	91	EDCs
	33.81	Hexadecanoic acid, TMS	97	EDCs, mutagenic
	35.60	D-Lactic acid- DITMS	89	Genotoxicity
	40.27	Lactic acid, TMS ether, TMS	93	Genotoxicity
	42.19	Cinnamic acid-α-phenyl-TMS ester	96	Genotoxicity
	43.77	β- Sitosterol TMS	98	EDCs, genotoxicity, Mutagenic
	47.01	4-Mercaptobenzoic acid	86	Carcinogenic
After phytoextraction	RT	Compounds	% similarity with NIST	Toxicity
	6.31	Pentatonic acid, TMS ester	91	Long-term hazard
	19.39	1,4-Bis (hexadecyl)-2,5-divinylbenzene	78	Serious eye damage/eye irritation
	21.76	O-Trimethylsilyl Pyridine-2-Amidoxime	81	Unknown
	27.68	6-Acetyl-1-acetoxy-10-hydroxy-neoline	83	Data not known
	30.56	1-Methyl-3-(3,4-dimethoxyphenyl)-6,7-dimethoxyisochromene	78	Data not known
	42.99	Decane, 1 bromo-2-methy	71	Data not known

TMS: Trimethylsilyl; RT: Retention Time (Min).