title: Effect of pyrolysis temperature on polycyclic aromatic hydrocarbons toxicity and sorption behaviour of biochars prepared by pyrolysis of paper mill effluent treatment plant sludge.
abstract: The polycyclic aromatic hydrocarbons (PAHs) toxicity and sorption behaviour of biochars prepared from pyrolysis of paper mill effluent treatment plant (ETP) sludge in temperature range 200-700 °C was studied. The sorption behaviour was found to depend on the degree of carbonization where the fractions of carbonized and uncarbonized organic content in the biochar act as an adsorption media and partition media, respectively. The sorption and partition fractions were quantified by isotherm separation method and isotherm parameters were correlated with biochar properties (aromaticity, polarity, surface area, pore volume and ash content). The risk assessment for the 16 priority EPA PAHs present in the biochar matrix was performed and it was found that the concentrations of the PAHs in the biochar were within the permissible limits prescribed by US EPA (except BC400 and BC500 for high molecular weight PAHs).
authors.affiliation: Department of Chemical Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India.
authors.forename: Parmila
authors.initials: P
authors.lastname: Devi
authors.affiliation: Department of Chemical Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India. Electronic address: aksaroha@chemical.iitd.ac.in.
authors.forename: Anil K
authors.initials: AK
authors.lastname: Saroha
mesh_terms: D002244:Carbon / Q000737:chemistry; D002273:Carcinogens / Q000633:toxicity; D002606:Charcoal / Q000032:analysis / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D007220:Industrial Waste; D010209:Paper; D010416:Pentachlorophenol / Q000737:chemistry / Q000302:isolation & purification / Q000633:toxicity; D011084:Polycyclic Aromatic Hydrocarbons / Q000737:chemistry* / Q000302:isolation & purification / Q000633:toxicity*; D016062:Porosity; D018570:Risk Assessment / Q000379:methods; D012722:Sewage; D013499:Surface Properties; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000633:toxicity
chemical_list: D002273:Carcinogens; D007220:Industrial Waste; D011084:Polycyclic Aromatic Hydrocarbons; D012722:Sewage; D014874:Water Pollutants, Chemical; C540010:biochar; D002606:Charcoal; D002244:Carbon; D010416:Pentachlorophenol
keywords: Adsorption; Biochar; Polycyclic aromatic hydrocarbons; Pyrolysis; Sludge