التفاصيل البيبلوغرافية
| العنوان: |
Adsorption of Activated Sludge for Copper and Inorganic Nitrogen in Single and Compound Pollution. (English) |
| المؤلفون: |
JIA Ruili, WU Shichun, ZHAO Qianming, HE Peimin, SHAO Liu |
| المصدر: |
Environmental Science & Technology (10036504); 2022, Vol. 45 Issue 9, p10-17, 8p |
| مصطلحات موضوعية: |
ACTIVATED sludge process, ADSORPTION kinetics, ADSORPTION (Chemistry), NITROGEN compounds, POLLUTION, SEWAGE sludge, ATMOSPHERIC nitrogen, LANGMUIR isotherms |
| مستخلص: |
In this study, the adsorption effect of Cu2+, NH4+ and NO3- by activated sludge under single pollution and binary and triple compound pollution was analyzed, and the adsorption kinetics and equilibrium isotherms of Cu2+ and NH4+ in wastewater were explored as well. The results showed that under the experimental conditions: in the case of single pollution, the adsorption amount of NH4+ and Cu2+ by activated sludge reached 6.30 mg/g and 1.38 mg/g, respectively. No obvious adsorption ability was shown for NO3- under single pollution condition; In the case of dual compound pollution, the presence of Cu2+ and NO3- promoted the adsorption of NH4+ by activated sludge, and stronger promotion was observed while coexisting with NO3-, and the presence of NH4+ and NO3- had extremely significant inhibitory effects on the adsorption of Cu2+ by activated sludge (P<0.01); In the case of triple compound pollution, the presence of NO3- and Cu2+ promoted the adsorption of NH4+ by activated sludge, and the presence of NH4+ and NO3- had extremely significant inhibitory effects on the adsorption of Cu2+ by activated sludge (P<0.01). It was concluded that the adsorption process of Cu2+ and NH4+ by activated sludge conformed to the Langmuir adsorption isotherm model, the maximum adsorption amount of NH4+ by activated sludge was 11.920 4 mg/g, and the maximum adsorption amount for Cu2+ was 23.402 8 mg/g. Both the pseudo-first-order kinetic equation and the pseudo-second-order kinetic equation provided high correlation to the data. The conclusions of this study can provide a reference for the application of activated sludge in the treatment of wastewater contaminated by heavy metals and nutrients. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
