{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T20:19:19Z","timestamp":1788380359069,"version":"build-2803163510"},"reference-count":37,"publisher":"American Chemical Society (ACS)","issue":"16","license":[{"start":{"date-parts":[[2016,7,27]],"date-time":"2016-07-27T00:00:00Z","timestamp":1469577600000},"content-version":"vor","delay-in-days":13,"URL":"https:\/\/pubs.acs.org\/page\/policy\/authorchoice_termsofuse.html"}],"funder":[{"DOI":"10.13039\/100000005","name":"U.S. Department of Defense","doi-asserted-by":"publisher","award":["NA"],"award-info":[{"award-number":["NA"]}],"id":[{"id":"10.13039\/100000005","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004543","name":"China Scholarship Council","doi-asserted-by":"publisher","award":["NA"],"award-info":[{"award-number":["NA"]}],"id":[{"id":"10.13039\/501100004543","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2016,8,16]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Long-term operation of microbial fuel cells (MFCs) can result in substantial degradation of activated carbon (AC) air-cathode performance. To examine a possible role in fouling from organic matter in water, cathodes were exposed to high concentrations of humic acids (HA). Cathodes treated with 100 mg L\u20131 HA exhibited no significant change in performance. Exposure to 1000 mg L\u20131 HA decreased the maximum power density by 14% (from 1310 \u00b1 30 mW m\u20132 to 1130 \u00b1 30 mW m\u20132). Pore blocking was the main mechanism as the total surface area of the AC decreased by 12%. Minimization of external mass transfer resistances using a rotating disk electrode exhibited only a 5% reduction in current, indicating about half the impact of HA adsorption was associated with external mass transfer resistance and the remainder was due to internal resistances. Rinsing the cathodes with deionized water did not restore cathode performance. These results demonstrated that HA could contribute to cathode fouling, but the extent of power reduction was relatively small in comparison to large mass of humics adsorbed. Other factors, such as biopolymer attachment, or salt precipitation, are therefore likely more important contributors to long-term fouling of MFC cathodes.<\/jats:p>","DOI":"10.1021\/acs.est.6b00827","type":"journal-article","created":{"date-parts":[[2016,7,14]],"date-time":"2016-07-14T11:09:05Z","timestamp":1468494545000},"page":"8904-8909","source":"Crossref","is-referenced-by-count":29,"title":["Substantial\nHumic Acid Adsorption to Activated Carbon\nAir Cathodes Produces a Small Reduction in Catalytic Activity"],"prefix":"10.1021","volume":"50","author":[{"given":"Wulin","family":"Yang","sequence":"first","affiliation":[{"name":"The Pennsylvania State University , , University Park , ,","place":["Pennsylvania, United States, 16802"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Valerie J.","family":"Watson","sequence":"additional","affiliation":[{"name":"The Pennsylvania State University , , University Park , ,","place":["Pennsylvania, United States, 16802"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bruce E.","family":"Logan","sequence":"additional","affiliation":[{"name":"The Pennsylvania State University , , University Park , ,","place":["Pennsylvania, United States, 16802"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2016,7,14]]},"reference":[{"key":"2026090215493654800_cit1","doi-asserted-by":"publisher","first-page":"2058","DOI":"10.1016\/j.bios.2006.01.033","article-title":"Harvesting\nenergy from the marine sediment-water interface II - Kinetic activity\nof anode materials","volume":"21","author":"Lowy","year":"2006","journal-title":"Biosens. 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Technol."},{"key":"2026090215493654800_cit15","doi-asserted-by":"publisher","first-page":"1197","DOI":"10.1016\/j.biortech.2008.08.005","article-title":"Effects of\nthe Pt loading side and cathode-biofilm\non the performance of a membrane-less and single chamber microbial\nfuel cell","volume":"100","author":"Yang","year":"2009","journal-title":"Bioresour. 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