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All figures (15)
Fig. 6. Influence of pH on heavy metal removal from AMD solution with 500 °C heated 425 zeolite (dose = 10 ± 0.2 g/L) 426
Table 3 Performance of natural and heat treated zeolite with AMD solution (sorbent dose 5.0 280 ± 0.2 g/L, pH 2.0 ± 0.2). 281
Table 7 Pseudo first and second order kinetic parameters for heavy metal sorption from 361 AMD solution at pH 2.0 ± 0.2 using 500 °C heat treated zeolite (dose =10 ± 0.2 g/L) 362
Table 1 Characteristics of synthetic AMD 131
Fig. 8. SEM-EDX of hollowfiber membrane (a) virgin (b) used membrane with AMD in 483 submerged DCMD (c) used membrane with AMD in integrated DCMD-sorption. 484
Fig. 1. Set-up of integrated submerged DCMD – sorption system 259 2.5.1 Membrane analysis 260 The morphology and element composition on the surface of the used and virgin membranes 261 were analysed using SEM-EDX at a voltage of 15 kV as per the details mentioned in Section 262 2.3.3. The hydrophobicity of the virgin and used membranes were evaluated by measuring 263 the water contact angle of the membrane using a goniometer (Theta Lite, Biolin Scientific, 264 Sweden). Measurements were duplicated at different location of the membrane and the 265 average value was used for this study. 266
Fig. 4. EDX results of natural and 500 °C heat treated zeolite (before and after heavy metal 321 sorption). 322 323 324
Fig. 3. SEM images of (a) natural untreated zeolite and 500 °C heat treated zeolite (b) 318 unused/before sorption and (c) after heavy metal sorption 319
Fig. 7. Permeate flux for AMD treatment using submerged DCMD and integrated submerged 480 DCMD –sorption system 481 482
Table 2 Natural zeolite chemical contents 151
Table 5 EDX results of natural and 500 °C heat treated zeolite 325
Fig. 2. XRD peaks of natural and heat treated zeolite 306 307
Fig. 5. 500 °C heat treated zeolite (a) heavy metal removal as a function of sorbent dose (pH 416
Table 6 Isotherm data (Langmuir and Freundlich) for heavy metal sorption from AMD 347 solution at pH 2.0 ± 0.2 using 500 °C heat treated zeolite. 348
Table 4 Surface area and pore width of natural and heat treated zeolite. 297
Journal Article
•
DOI
•
Acid mine drainage treatment by integrated submerged membrane distillation-sorption system.
[...]
Seongchul Ryu
1
,
Gayathri Naidu
1
,
Abu Hasan Johir
1
,
Youngkwon Choi
1
,
Sanghyun Jeong
2
,
Saravanamuthu Vigneswaran
1
- Show less
+2 more
•
Institutions (2)
University of Technology, Sydney
1
,
Sungkyunkwan University
2
01 Mar 2019
-
Chemosphere