Characterization and coagulation–flocculation behavior of an inorganic polymer coagulant – poly-ferric-zinc-sulfate

Wei, Yanxin; Dong, Xiongzi; Ding, Aimin; Xie, Dong

doi:10.1016/j.jtice.2015.06.004

Cited by 58 publications

(19 citation statements)

References 29 publications

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“…This favored coagulation of colloidal particles and aggregation to form compact flocs due to the addition of PDM. Similar results were found in the research of coagulation behavior and characterization of poly‐ferric‐zinc‐sulfate …”

Section: Resultssupporting

confidence: 87%

“…Similar results were found in the research of coagulation behavior and characterization of poly-ferric-zinc-sulfate. 43 The flocs with relatively high SV 30 values had poor settling ability in a secondary sedimentation tank, which would reduce wastewater treatment capacity and increase treatment load of the subsequent sludge dewatering process. It can be concluded that PFC-PDM gave much better sludge compressibility than PFC.…”

Section: Sedimentation Performancementioning

confidence: 99%

“…In this process, the destabilized substances in wastewater can aggregate into larger‐sized flocs after the addition of coagulants . Hence, studies on coagulants with obvious advantages have attracted increasing attention …”

Section: Introductionmentioning

confidence: 99%

“…3 Hence, studies on coagulants with obvious advantages have attracted increasing attention. 4,5 Recently, three flocculant categories have been classified: inorganic, 6 organic 7 and composite coagulants. 8,9 Inorganic polymeric coagulants are commonly used in water treatment, and have superior coagulation behavior and a simple preparation procedure, but reagents with low molecular weight lead to decreased aggregation capacity.…”

Section: Introductionmentioning

confidence: 99%

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Preparation, characterization and flocculation performance of the inorganic–organic composite coagulant polyferric chloride and polydimethyldiallylammonium chloride

Wang

Shui

Liu

et al. 2016

J of Chemical Tech & Biotech

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BACKGROUND A novel composite coagulant was prepared from polyferric chloride (PFC) and polydimethyldiallylammonium chloride (PDM) using two different methods: co‐polymerization and composite polymerization. In this investigation, effects of preparation parameters such as PDM/Fe weight ratio (P) and PDM molecular weight on zeta potential and Fe (III) species distribution were also studied. In addition, the effects of those parameters on coagulation efficiency of prepared coagulants in treating drilling wastewater was evaluated and the synthetic coagulants were characterized in terms of typical properties and morphological analysis. RESULTS The improvements in preparation parameters were better charge neutralization capacity and the highest content of active Fe (III) coagulating species due to the presence of cationic polymer. The optimal coagulation efficiency was obtained at a PDM/PFC weight ratio of 0.3 and PDM molecular weight of 200–350 kDa. PFC‐PDM turned out to be a physical mixture according to Fourier transform infrared (FTIR) analysis, although the coagulation behavior was changed after the PFC/PDM composite was formed. Morphology analysis displayed an irregular surface and multi‐branched structure for PFC‐PDM. CONCLUSION The novel composite coagulant PFC‐PDM exhibited a superior flocculation performance and obtained favorable coagulation behavior with more compact flocs and a much better sludge compressibility compared with PFC alone. © 2016 Society of Chemical Industry

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Section: Resultssupporting

confidence: 87%

Section: Sedimentation Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Preparation, characterization and flocculation performance of the inorganic–organic composite coagulant polyferric chloride and polydimethyldiallylammonium chloride

Wang

Shui

Liu

et al. 2016

J of Chemical Tech & Biotech

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“…Polymer-based products also improve settleability and increase the floc toughness (Renault et al, 2009). According to Cheng and Chi (2002) and Wei et al (2016), the main organic matter removal mechanisms using inorganic polymeric coagulants were generally attributed to adsorption, entrapment, complexation, charge neutralization and to a lesser extent.…”

Section: Inorganic Polymeric Coagulantsmentioning

confidence: 99%

Chemical Coagulation/Flocculation Processes for Removal of Phenolic Compounds from Olive Mill Wastewater: A Comprehensive Review

Achak¹,

Elayadi²,

Boumya³

2019

American Journal of Applied Sciences

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Olive oil extraction processes generate three phases: Olive oil, solid residue (pomace) and aqueous liquor Olive Mill Wastewater (OMW). OMW causes serious environmental deteriorations such as coloring of natural waters, alteration of soil quality, phytotoxicity and odor nuisance. The direct discharge of this effluent into the soil bring various negative effects on the environment, due to its high load of organic matter and phenolic compounds. Coagulation, flocculation and their combination processes are among the most applied processes for wastewater treatment. The application of coagulation technique using mineral and inorganic polymeric coagulants and acid cracking is not always effective to reduce COD and phenolic compounds from OMW except lime. Although direct flocculation is a low treatment cost, use less chemical and produce less sludge, the efficiency of COD and phenolic compounds removal remain very low. Coagulationflocculation process is developed in order to enhance the removal efficiency of organic matter from OMW by optimizing the operating conditions. However, many studies showed that the combination of various cationic organic coagulant and flocculant agents did not show any significant decrease of COD and phenolic compounds except for lime combination. In the present review, recent research studies dealing with the application of coagulation/flocculation for removal of phenolic compounds and COD from OMW are presented and compared. Furthermore, the main factors that influence the selection between coagulation, direct flocculation and coagulation-flocculation are presented and the principal removal mechanisms are discussed.

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Synthesis and evaluation of a novel inorganic–organic composite flocculant, consisting of chitosan and poly‐ferric cerium silicate

Liu

Zhu

Yang

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Coagulation/flocculation is widely used in the treatment of dye wastewater because of the low cost, high efficiency, short process and convenient operation. However, with the increase of pollutants in water and in recent years the higher requirement for environment protection, traditional flocculants have found it difficult to meet the processing requirements. Therefore, to develop new, efficient, stable and environment‐friendly flocculants is very necessary and urgent. RESULTS Decoloration performance and mechanism, stability and structure of flocculants were determined from experimental data, and the results indicated that chitosan and poly‐ferric cerium silicate (CTS‐PFCS) flocculant, a three‐dimensional chain‐net structure with bar‐like branches, was a complex compound rather than a simple mixture of raw materials. The decoloration performance and stability of this flocculant was superior to that of poly‐ferric cerium silicate (PFCS) when treating Direct Red dye wastewater, and also it had a wide range of pH application. The main mechanism for flocculation is charge‐neutralization and chemical adsorption in the initial stage of flocculation and later bridge‐aggregation. CONCLUSION A novel inorganic–organic composite flocculant CTS‐PFCS was successfully synthesized by the combination of chitosan and homemade PFCS. The potential use of chitosan as an organic additive for modifying inorganic polymers flocculant in the clarification of wastewater was demonstrated. © 2018 Society of Chemical Industry

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Characterization and coagulation–flocculation behavior of an inorganic polymer coagulant – poly-ferric-zinc-sulfate

Cited by 58 publications

References 29 publications

Preparation, characterization and flocculation performance of the inorganic–organic composite coagulant polyferric chloride and polydimethyldiallylammonium chloride

Preparation, characterization and flocculation performance of the inorganic–organic composite coagulant polyferric chloride and polydimethyldiallylammonium chloride

Chemical Coagulation/Flocculation Processes for Removal of Phenolic Compounds from Olive Mill Wastewater: A Comprehensive Review

Synthesis and evaluation of a novel inorganic–organic composite flocculant, consisting of chitosan and poly‐ferric cerium silicate

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