Study on the macromolecular coagulant PEX which traps heavy metals

Chang, Qing; Wang, Gang

doi:10.1016/j.ces.2007.05.002

Cited by 107 publications

(32 citation statements)

References 9 publications

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“…In order to remove both soluble heavy metal and insoluble substances efficiently by coagulation, sodium xanthogenate group was grafted to polyethyleneimine (Chang and Wang, 2007). This new kind of coagulant was an amphoteric polyelectrolyte.…”

Section: Coagulation and Flocculationmentioning

confidence: 99%

Removal of heavy metal ions from wastewaters: A review

Wang

2011

Journal of Environmental Management

7,068

3,041

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Section: Coagulation and Flocculationmentioning

confidence: 99%

Removal of heavy metal ions from wastewaters: A review

Wang

2011

Journal of Environmental Management

7,068

3,041

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“…Heavy metal ions i.e., Pb 21 , Cd 21 , and Cu 21 are potential hazards to aquatic, animal, and human life because of their toxicity, even at low concentrations. 1 Various treatment methods i.e., chemical precipitation, 2 adsorption, 3 ion-exchange, 4 membrane filtration, 5,6 coagulation and flocculation, 7 and electrochemical treatment 8 have been widely used for the removal of heavy metal ions from aqueous medium. Among them, adsorption is one of the most effective and economical methods.…”

Section: Introductionmentioning

confidence: 99%

Thiourea modified hyper‐crosslinked polystyrene resin for heavy metal ions removal from aqueous solutions

Yang

Huang

Yao

et al. 2017

J of Applied Polymer Sci

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A hyper-crosslinked resin chemically modified with thiourea (TM-HPS) was synthesized, characterized, and evaluated for the removal of heavy metal ions (Pb 21 , Cd 21 , and Cu 21 ) from aqueous solutions. The structural characterization results showed that a few thiourea groups were grafted on the surface of the resin with a big BET surface area and a large number of narrow micropores.Various experimental conditions such as pH, contact time, temperature, and initial metal concentration of the three heavy metal ions onto TM-HPS were investigated systematically. The results indicated that the prepared resin was effective for the removal of the heavy metal ions from aqueous solutions. The isotherm data could be better fitted by Langmuir model, yielding maximum adsorption capacities of 689.65, 432.90, and 290.69 mg/g for Pd 21 , Cd 21 , and Cu 21 , respectively. And the adsorption kinetics of the three metal ions followed the pseudo-second-order equation. FTIR and XPS analysis of TM-HPS before and after adsorption further revealed that the adsorption mechanism could be a synergistic effect between functional groups and metal ions and electrostatic attraction, which may provide a new insight into the design of highly effective adsorbents and their potential technological applications for the removal of heavy metal ions from aqueous solutions.

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“…Many technologies are available for wastewaters treatment [10,11] viz. coagulation-flocculation [12], precipitation [13], oxidation [14], sorption [15][16][17] (on activated sludge, charcoal or non-conventional material [18]), but among them, membrane processes, and especially pressure-driven membranes, have demonstrated a great potential for the decontamination of aqueous solutions [19][20][21]. Membrane technologies are indeed particularly attractive due to their respect of the treated solutions and environment, as they require neither temperature rise nor chemical adjuvant.…”

Section: Introductionmentioning

confidence: 99%