Method for absorbing and removing arsenic using paper mill sludge

Provided is a magnetic biochar which can recover an energy source in a process of treating paper sludge and can be used for removing heavy metals, and a method for adsorbing and removing arsenic using the same. The method for adsorbing and removing arsenic using paper sludge comprises the steps of:...

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Bibliographische Detailangaben
Hauptverfasser:	KWON, E. EILHANN, KWON, GI HOON, SONG, HO CHEOL, CHO, DONG WAN, YOON, KANG SUK
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	CHEMISTRY METALLURGY TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	Provided is a magnetic biochar which can recover an energy source in a process of treating paper sludge and can be used for removing heavy metals, and a method for adsorbing and removing arsenic using the same. The method for adsorbing and removing arsenic using paper sludge comprises the steps of: coagulating and precipitating paper wastewater using iron salts and lime to obtain paper sludge; pyrolyzing the paper sludge in a carbon dioxide atmosphere; and adsorbing arsenic using the magnetic biochar recovered by pyrolysis as an adsorbent. 제지슬러지를 처리하는 과정에서 에너지원을 회수하고 중금속 제거에 이용할 수 있는 자성 바이오차 및 이를 이용한 비소의 흡착제거방법이 제공된다. 이 제지슬러지를 이용한 비소의 흡착제거방법은 철염 및 석회를 이용하여 제지폐수를 응집침전하여 제지슬러지를 수득하는 단계; 제지슬러지를 이산화탄소 분위기에서 열분해하는 단계; 및 열분해에 의해 회수된 자성 바이오차를 흡착제로 사용하여 비소를 흡착하는 단계를 포함한다.