{"id":20,"date":"2013-02-26T20:37:53","date_gmt":"2013-02-26T20:37:53","guid":{"rendered":"http:\/\/faculty.engineering.ucdavis.edu\/template\/?page_id=20"},"modified":"2017-09-13T09:31:26","modified_gmt":"2017-09-13T17:31:26","slug":"research","status":"publish","type":"page","link":"https:\/\/faculty.engineering.ucdavis.edu\/morales\/research\/","title":{"rendered":"Research"},"content":{"rendered":"

\"fabgraphabst\"<\/a>Anomalous transport in porous media<\/h2>\n

Early\/delayed\u00a0arrival of solutes leads to poor mixing and long residence times, and is a phenomenon known as \u201danomalous transport\u201d. Typical upscaling transport models\u00a0attribute anomalous transport behavior\u00a0to structures like\u00a0fractures. Nevertheless, anomalous transport has been observed even in highly homogeneous porous media. This work aims to\u00a0establish\u00a0formal relationships between structural features of the pore-space and\u00a0the observed intensity of anomalous transport.<\/p>\n

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Publications: Carrel et al., (Under review); Carrel et al., 2017<\/a>; Morales et al., (2017)<\/a>;\u00a0Holzner et al., 2015<\/a><\/p>\n

\"interfaces\"<\/a>Soil architecture effects on colloid filtration<\/h2>\n

Landfill and agricultural soils\u00a0are expected to receive large loads of nano-silver (nAg) through land application of wastewater sludge.\u00a0This puts\u00a0beneficial\u00a0soil-microbes at risk because nAg is an indiscriminate antimicrobial agent. The aim of this study is to assess the efficiency of interfaces within pores in\u00a0immobilizing nAg and other emerging environmental nano-contaminants for various typical moisture contents\u00a0and chemistry conditions to establish the best land management conditions to contain contaminant dispersion.<\/p>\n

Publications: Morales et al.\u00a0(In preparation); Morales et al., 2011<\/a>; Morales et al., 2009<\/a><\/p>\n

\"dom-colloid\"<\/a><\/p>\n

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Enhanced transport of colloids<\/span><\/h2>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Transport of colloid contaminants is enhanced in soils ammended with manure, but the mechanisms are not well understood. Results of this work indicate that organic matter from manure creates a hairy structure on the colloid surface called the “corona”. The\u00a0hair length, density and\u00a0electrostatic charge of this structure greatly alters the short-range forces that provide particles with stability. When the\u00a0hairy\u00a0layer\u00a0is dense and uniform, the colloids are typically highly\u00a0mobile. When the hairy layer\u00a0is sparse the colloids become\u00a0entangled\u00a0and deposited.<\/p>\n

Publications: Sang et al., 2014<\/a>;\u00a0Wang et al., 2012<\/a>;\u00a0Morales et al., 2011a<\/a>;\u00a0Morales et al.,2011b<\/a><\/p>\n

\u00a0\"dryingdrop\"<\/a>Drying drop dynamics<\/h2>\n
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Evaporation deposition is a common process\u00a0observed daily in coffee-stains, yet it is central to the\u00a0microfabrication industry. This\u00a0work provides a framework for controlling the shape and attachment strength of deposition stains with\u00a0solutes. Specifically, we show that the addition of nonionic surfactant can be tuned to control (i) the\u00a0surface tension of the drop, (ii) dynamics of the contact line during evaporation, (iii) colloid-substrate friction, (iv) morphology of deposited stains, and (v) attachment strength of stains.<\/p>\n

Publications: Zhao et al., (In preparation);\u00a0Morales et al., 2013<\/a><\/p>\n

\"networksbiochar\"<\/a><\/p>\n

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Reverse engineering of Biochar<\/span><\/h2>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Biochar is a growingly popular biomass carbonization tool with\u00a0wide-ranging agronomic and environmental gains.\u00a0However, the benefits of adding biochar to a soil greatly depend on how it is produced. In an effort to formulate “production recipies”, this study\u00a0built a meta-data library from which links between biochar physico-chemical properties and production parameters were statistically ascertained. Based on these relationships, the Biochar Engineering<\/span><\/a><\/strong><\/span>\u00a0web-tool was constructed to help\u00a0producers determine the optimal parameters needed to generate biochar that is tailored to mitigate specific\u00a0soil deficiencies.<\/p>\n

Publications: Morales et al., 2015<\/a>; Zhang et al., 2010<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Anomalous transport in porous media Early\/delayed\u00a0arrival of solutes leads to poor mixing and long residence times, and is a phenomenon known as \u201danomalous transport\u201d. Typical upscaling transport models\u00a0attribute anomalous transport behavior\u00a0to structures like\u00a0fractures. Nevertheless, anomalous transport has been observed even in highly homogeneous porous media. This work aims to\u00a0establish\u00a0formal relationships \u2026 Continue reading → <\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-twocolumns-left.php","meta":{"inline_featured_image":false,"ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-20","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/faculty.engineering.ucdavis.edu\/morales\/wp-json\/wp\/v2\/pages\/20","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/faculty.engineering.ucdavis.edu\/morales\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/faculty.engineering.ucdavis.edu\/morales\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/faculty.engineering.ucdavis.edu\/morales\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/faculty.engineering.ucdavis.edu\/morales\/wp-json\/wp\/v2\/comments?post=20"}],"version-history":[{"count":38,"href":"https:\/\/faculty.engineering.ucdavis.edu\/morales\/wp-json\/wp\/v2\/pages\/20\/revisions"}],"predecessor-version":[{"id":373,"href":"https:\/\/faculty.engineering.ucdavis.edu\/morales\/wp-json\/wp\/v2\/pages\/20\/revisions\/373"}],"wp:attachment":[{"href":"https:\/\/faculty.engineering.ucdavis.edu\/morales\/wp-json\/wp\/v2\/media?parent=20"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}