Electrical neutralization ability of polyaluminum chloride (PACl) coagulants with different OH–/Al3+ ratios by fluorescence quenching effect

• Autorzy: Chi Fung Hwa , Cheng Wen Po , Yu Ruey Fang , Chen Zhao Feng

Identyfikatory

DOI

10.37190/epe200202

• Języki publikacji: EN

Abstrakty

EN

The electrical neutralization ability of polyaluminum chlorides (PACls) with respect to humic acid was investigated by the fluorescence quenching method. The Stern–Volmer constant (K_q) at various pH and coagulation doses was determined for polyaluminum chlorides (PACl-B) of various basicities (B, B = [OH^–]/[Al]). The experimental results show that under acidic conditions, the order of K_qvalues of PACl-B is PACl-2.5 > PACl-2.3 > PACl-1.5 > AlCl₃. In solutions of pH = 7, the order of K_qvalues is PACl-1.5 > PACl-2.3 > PACl-2.5 > AlCl3. When pH > 7, aluminum ions are rapidly hydrolyzed, thus PACls of various basicities generally do not show capacity for electrical neutralization with humic acid. At pH = 6, all PACls-B obtain the maximum K_q values, indicating that humic acid and PACl-Bcoagulation process is less affected by H⁺ or OH^– ions, and produces the best electrical neutralization ability. Compared to the past method of using surface potential as a means of determining the ability of neutralization of coagulation, the results of this study show that the K_q value of the quenching effect can reduce the experiment complexity.

Słowa kluczowe

EN

Stern-Volmer constant; polyaluminum chloride; humic acid; fluorescence

PL

stała Sterna-Volmera; polichlorek glinu; kwas humusowy; fluorescencja

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2020
• Tom: Vol. 46, nr 2
• Strony: 25--39
• Opis fizyczny: Bibliogr. 28 poz., tab., rys.

Twórcy

autor

Chi Fung Hwa

• Department of Environmental Engineering, Kun Shan University, No.195 Kunda Rd., YongKang District, Tainan City 710, Taiwan, R.O.C.

autor

Cheng Wen Po

• Department of Safety, Health and Environmental Engineering, National United University, Miaoli, Taiwan 360

autor

Yu Ruey Fang

• Department of Safety, Health and Environmental Engineering, National United University, Miaoli, Taiwan 360

autor

Chen Zhao Feng

• Department of Safety, Health and Environmental Engineering, National United University, Miaoli, Taiwan 360

Bibliografia

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