{"id":385,"date":"2026-10-09T08:01:02","date_gmt":"2026-10-09T08:01:02","guid":{"rendered":"https:\/\/kawabey.w.waseda.jp\/?p=385"},"modified":"2026-10-09T08:16:31","modified_gmt":"2026-10-09T08:16:31","slug":"research","status":"publish","type":"post","link":"https:\/\/kawabey.w.waseda.jp\/?p=385","title":{"rendered":"Research"},"content":{"rendered":"\n<style>\n\/* Kawabe Lab: all styles scoped to .kl-en, safe to paste into a WordPress Custom HTML block *\/\n.kl-en { --wine:#871b3a; --ink:#253446; --muted:#586575; --border:#e5e8ed; --pale:#f7f5f4; font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Arial,\"Hiragino Sans\",sans-serif; color:var(--ink); background:#fff; line-height:1.75; font-size:16px; width:100%; max-width:1100px; margin:0 auto; box-sizing:border-box; }\n.kl-en *, .kl-en *::before,.kl-en *::after { box-sizing:border-box; }\n.kl-en h1,.kl-en h2,.kl-en h3,.kl-en p,.kl-en figure { margin:0; }\n.kl-en h1,.kl-en h2,.kl-en h3 { line-height:1.35; }\n.kl-en a { 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.kl-brand-sub{font-size:9px;letter-spacing:.02em}.kl-en .kl-rail{height:48px}.kl-en .kl-nav a{font-size:12px;padding:12px 1px 10px}.kl-en .kl-hero{padding:0 0 35px}.kl-en .kl-photos{grid-template-rows:133px 133px}.kl-en .kl-grid,.kl-en .kl-grid.triple{grid-template-columns:1fr}.kl-en .kl-research-highlights{padding:24px 14px}.kl-en .kl-page-title{font-size:26px}.kl-en .kl-prof-card{padding:20px 18px}.kl-en .kl-prof-card strong{font-size:22px}.kl-en .kl-pill{display:none}.kl-en .kl-section-title{font-size:22px}}\n@media(max-width:380px){.kl-en .kl-brand-row{align-items:flex-start}.kl-en .kl-brand-main{font-size:19px}.kl-en .kl-nav a{font-size:11px}}\n<\/style>\n<div class=\"kl-en\" lang=\"en\">\n<header class=\"kl-header\">\n  <div class=\"kl-brand-row\">\n    <a class=\"kl-identity\" href=\"https:\/\/kawabey.w.waseda.jp\/?p=383\">\n      <span class=\"kl-rail\" aria-hidden=\"true\"><\/span>\n      <span><span class=\"kl-brand-main\">Kawabe Laboratory<\/span><span class=\"kl-brand-sub\">GEOSPHERE ENVIRONMENTAL SCIENCE \u00b7 WASEDA UNIVERSITY<\/span><\/span>\n    <\/a>\n    <a class=\"kl-lang\" lang=\"ja\" href=\"https:\/\/kawabey.w.waseda.jp\/?p=339\" title=\"Japanese version\">\u65e5\u672c\u8a9e<\/a>\n  <\/div>\n  <nav class=\"kl-nav\" aria-label=\"Main navigation\">\n    <a href=\"https:\/\/kawabey.w.waseda.jp\/?p=383\">Home<\/a>\n    <a href=\"https:\/\/kawabey.w.waseda.jp\/?p=385\" aria-current=\"page\">Research<\/a>\n    <a href=\"https:\/\/kawabey.w.waseda.jp\/?p=387\">Members<\/a>\n    <a href=\"https:\/\/researchmap.jp\/kyawabe\" target=\"_blank\" rel=\"noopener noreferrer\">Publications \u2197<\/a>\n  <\/nav>\n<\/header>\n<main class=\"kl-main\">\n<section aria-labelledby=\"kl-research-page-title\"><span class=\"kl-kicker\">RESEARCH<\/span><h1 class=\"kl-page-title\" id=\"kl-research-page-title\">Research at Kawabe Laboratory<\/h1>\n  <p class=\"kl-lead\">Our research focuses on contaminant transport and geochemical and biological processes in soils, groundwater, and river systems. We integrate field investigations, laboratory experiments, and numerical simulations to develop remediation technologies and evaluate environmental and human-health risks.<\/p>\n  <figure class=\"kl-diagram\"><img decoding=\"async\" src=\"https:\/\/kawabey.w.waseda.jp\/wp-content\/uploads\/2026\/10\/kawabe_research_diagram_en.jpg\" alt=\"Conceptual illustration of transport processes in soil, rivers, and groundwater, including mining-derived metals, microplastics, PFAS, and DNAPL\/LNAPL\" loading=\"eager\"><figcaption>Conceptual illustration of geosphere contaminant transport and environmental processes (figure labels in Japanese).<\/figcaption><\/figure>\n  <div class=\"kl-prose\"><p>Our work addresses <strong>heavy metals and metalloids<\/strong>, naturally occurring contaminants, <strong>per- and polyfluoroalkyl substances (PFAS)<\/strong>, <strong>volatile organic compounds (VOCs)<\/strong>, and <strong>micro- and nanoplastics<\/strong>. For organic contamination, we also consider the environmental behavior of <strong>dense and light non-aqueous phase liquids (DNAPL and LNAPL)<\/strong>.<\/p>\n  <p>We study how these substances move, react, persist, or attenuate in the environment. In parallel, we investigate low-cost and resource-efficient remediation methods using natural minerals, eggshells and other shells, industrial by-products, and microorganisms. Related work includes soil CO\u2082 uptake and mineral carbonation.<\/p><\/div>\n  <h2 class=\"kl-content-title\">Main Research Topics<\/h2><div class=\"kl-grid\"><article class=\"kl-card\"><h3>Micro- and Nanoplastic Transport in the Geosphere<\/h3><p>We investigate adsorption, aggregation, and transport of micro- and nanoplastics in rivers and soils through laboratory experiments and numerical modeling.<\/p><\/article><article class=\"kl-card\"><h3>Acidic Rivers and Mine-related Contamination<\/h3><p>We study changes in water chemistry and the mobilization, precipitation, and remobilization of potentially toxic elements, including arsenic and zinc, in river water and sediments.<\/p><\/article><article class=\"kl-card\"><h3>Remediation Using Natural Materials, By-products, and Microorganisms<\/h3><p>We examine neutralization, contaminant removal, immobilization, and biodegradation using eggshells, shells, steelmaking slag, natural minerals, and microbial processes.<\/p><\/article><article class=\"kl-card\"><h3>PFAS Transport and Multi-pathway Exposure Assessment<\/h3><p>We evaluate transport from soil to groundwater, air, and crops, and assess how chemical properties and environmental variability affect potential exposure and risk.<\/p><\/article><article class=\"kl-card\"><h3>Organic Contaminants and Monitored Natural Attenuation<\/h3><p>We examine the transport and transformation of VOCs and chlorinated solvents, including microbial reductive dechlorination, with attention to DNAPL and LNAPL behavior and monitored natural attenuation (MNA).<\/p><\/article><article class=\"kl-card\"><h3>CO\u2082 Uptake, Mineral Carbonation, and Environmental Modeling<\/h3><p>We investigate soil CO\u2082 uptake and mineral carbonation and develop transport\u2013reaction simulations and data-analysis methods to support environmental assessment.<\/p><\/article><\/div>\n  <div class=\"kl-keywords\"><strong>Keywords:<\/strong> Geosphere environmental science; soil and groundwater contamination; river environments; heavy metals and metalloids; PFAS; VOCs; DNAPL; LNAPL; micro- and nanoplastics; environmental remediation; CO\u2082 sequestration; monitored natural attenuation (MNA); numerical simulation; environmental and health risk assessment.<\/div>\n  <div class=\"kl-foot\"><a href=\"https:\/\/kawabey.w.waseda.jp\/?p=383\">\u2190 Back to Home<\/a><\/div>\n<\/section>\n<\/main>\n<footer class=\"kl-footer\">\n  Waseda University \u00b7 Kawabe Laboratory<br>\n  <a href=\"https:\/\/www.env.waseda.ac.jp\/\" target=\"_blank\" rel=\"noopener noreferrer\">Department of Resources and Environmental Engineering \u2197<\/a>\n<\/footer>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Kawabe LaboratoryGEOSPHERE ENVIRONMENTAL SCIENCE \u00b7 WASEDA UNIVERSITY \u65e5\u672c\u8a9e Home Research Members Publications \u2197  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-385","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/kawabey.w.waseda.jp\/index.php?rest_route=\/wp\/v2\/posts\/385","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kawabey.w.waseda.jp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kawabey.w.waseda.jp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kawabey.w.waseda.jp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kawabey.w.waseda.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=385"}],"version-history":[{"count":3,"href":"https:\/\/kawabey.w.waseda.jp\/index.php?rest_route=\/wp\/v2\/posts\/385\/revisions"}],"predecessor-version":[{"id":394,"href":"https:\/\/kawabey.w.waseda.jp\/index.php?rest_route=\/wp\/v2\/posts\/385\/revisions\/394"}],"wp:attachment":[{"href":"https:\/\/kawabey.w.waseda.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=385"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kawabey.w.waseda.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=385"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kawabey.w.waseda.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=385"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}