Preparation and Mechanism of a New Enhanced Flocculant Based on Bentonite for Drinking Water

Table 7

The treatment effect for Xinjiang Karamay City drinking water with enhanced flocculant BTA.

Number	Testing items	China National Standard; (China GB 5749-2006)	Testing results; (SN. G2013024)	Unit
1	Chromaticity	≤15	<5	Degree
2	Turbidity	≤1 or ≤3	<0.5	NTU
3	Odor and taste	No foreign order and taste	No
4	Visible matter	No	No
5	pH	6.5–8.5	7.92
6	Total hardness (as CaCO3)	≤450	189	mg/L
7	Iron	≤0.3	<0.005	mg/L
8	Manganese	≤0.1	<0.022	mg/L
9	Copper	≤1.0	<0.0015	mg/L
10	Zinc	≤1.0	<0.0015	mg/L
11	Cadmium	≤0.005	<2.0 × 10^−6	mg/L
12	Lead	≤0.01	<5.0 × 10^−5	mg/L
13	Volatile phenol (as phenol)	≤0.002	<0.002	mg/L
14	Composite anionic detergent	≤0.3	<0.05	mg/L
15	Sulfate	≤250	93.82	mg/L
16	Chloride	≤250	109.38	mg/L
17	Total dissolved solids	≤1000	304	mg/L
18	Fluoride	≤1.0	0.38	mg/L
19	Cyanide	≤0.05	<0.002	mg/L
20	Arsenic	≤0.01	<9.0 × 10^−4	mg/L
21	Selenium	≤0.01	<9.0 × 10^−4	mg/L
22	Mercury	≤0.001	<9.0 × 10^−5	mg/L
23	Chromium (hexavalent)	≤0.05	<0.004	mg/L
24	Nitrate (as nitrogen)	≤10	0.45	mg/L
25	Trichloromethane	≤0.06	<2.0 × 10^−4	mg/L
26	Tetrachloromethane	≤0.002	<1.0 × 10^−4	mg/L
27	Bacterial colony number	≤100	30	CFU/mL
28	Total α radioactivity	≤0.5	<0.016	Bq/L
29	Total β radioactivity	≤1	0.038	Bq/L
30	Oxygen consumption (as O2)	≤3	1.75	mg/L
31	Aluminum	≤0.2	0.092	mg/L