Acid mine drainage treatment by integrated submerged membrane distillation-sorption system.

TLDR: The results showed that modified (heat treated) zeolite achieved 26-30% higher removal of heavy metals compared to natural untreatedZeolite, and the integrated system produced high quality fresh water while concentrating sulfuric acid and valuable heavy metals (Cu, Zn and Ni).

About: This article is published in Chemosphere.The article was published on 2019-03-01 and is currently open access. It has received 48 citations till now. The article focuses on the topics: Sorption & Membrane fouling.

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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