Chemical Vapour Deposition of MWCNT on Silica Coated Fe₃O₄ and Use of Response Surface Methodology for Optimizing the Extraction of Organophosphorus Pesticides from Water

Table 1

Percentage extraction recovery of azinphos methyl, chlorpyrifos, parathion, and malathion using Fe₃O₄@SiO₂-MWCNT adsorbent.

pH	Adsorbent dosage (mg)	Adsorbent time (min)	% Extraction recovery
			Azinphos methyl	Chlorpyrifos	Malathion	Parathion
3	80	6	55	90	75	99
3	43	33	34	71	47	85
7	43	6	75	89	52	71
3	6	6	17	64	17	51
11	6	60	20	84	13	31
7	43	60	82	84	73	88
7	43	33	90	91	73	92
11	6	6	25	59	12	43
7	43	33	73	77	74	89
11	80	60	76	79	15	99
3	80	60	17	87	31	65
7	6	33	27	61	31	48
3	6	60	14	84	15	20
11	43	33	69	84	17	94
7	80	33	78	96	100	99
11	80	6	86	89	21	99