Adsorption Characteristics of Benzene on Biosolid Adsorbent and Commercial Activated Carbons

• Published in: Journal of the Air & Waste Management Association (1995) Vol. 56; no. 5; pp. 591 - 600
• Main Authors: Chiang, Hung-Lung, Lin, Kuo-Hsiung, Chen, Chih-Yu, Choa, Ching-Guan, Hwu, Ching-Shyung, Lai, Nina
• Format: Journal Article
• Language: English
• Published: Pittsburgh, PA Taylor & Francis Group 01.05.2006; Air & Waste Management Association; Air and Waste Management Association; Taylor & Francis Ltd
• Subjects: Absorbents; Adsorption; Applied sciences; Benzene; Benzene - chemistry; Carbon - chemistry; Chemical engineering; Chlorides - chemistry; Environmental aspects; Environmental protection; Exact sciences and technology; General purification processes; Hydrocarbons; Industrial Waste; Methods; Other industrial wastes. Sewage sludge; Petrochemicals; Petroleum; Petroleum chemicals industry; Pollution; Porosity; Pyrolysis; Sewage - chemistry; Sewage sludge; Sewerage works: sewers, sewage treatment plants, outfalls; Waste Disposal, Fluid; Waste management; Wastes; Wastewaters; Water Pollutants, Chemical; Water Purification - methods; Water treatment and pollution; Water treatment plants; Zinc Compounds - chemistry; Taiwan; Petrochemical industry; Microporosity; Adsorption; Activated carbon; Adsorption capacity; Desorption; Sewage sludge; Sewage treatment plant; Macroporosity
• ISSN: 1096-2247; 2162-2906
• DOI: 10.1080/10473289.2006.10464469

This study selected biosolids from a petrochemical waste-water treatment plant as the raw material. The sludge was immersed in 0.5-5 M of zinc chloride (ZnCl 2 ) solutions and pyrolyzed at different temperatures and times. Results indicated that the 1-M ZnCl 2 -immersed biosolids pyrolyzed at 500 °C for 30 min could be reused and were optimal biosolid adsorbents for benzene adsorption. Pore volume distribution analysis indicated that the mesopore contributed more than the macropore and micropore in the biosolid adsorbent. The benzene adsorption capacity of the biosolid adsorbent was 65 and 55% of the G206 (granular-activated carbon) and BPL (coal-based activated carbon; Calgon, Carbon Corp.) activated carbons, respectively. Data from the adsorption and desorption cycles indicated that the benzene adsorption capacity of the biosolid adsorbent was insignificantly reduced compared with the first-run capacity of the adsorbent; therefore, the biosolid adsorbent could be reused as a commercial adsorbent, although its production cost is high.