{"id":6492,"date":"2026-07-01T15:43:12","date_gmt":"2026-07-01T19:43:12","guid":{"rendered":"https:\/\/dev26.lecowebtest.com\/news\/\/"},"modified":"2026-07-06T11:30:21","modified_gmt":"2026-07-06T15:30:21","slug":"fireworks-and-tourism-impacts-lake-michigan-water-quality","status":"publish","type":"post","link":"https:\/\/dev26.lecowebtest.com\/fr\/news\/fireworks-and-tourism-impacts-lake-michigan-water-quality\/","title":{"rendered":"Comment les feux d'artifice affectent-ils nos lacs ?"},"content":{"rendered":"<div class=\"wp-block-group is-style-leco-vertical-margin-top has-global-padding is-layout-constrained wp-container-core-group-is-layout-875e403b wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-1ffe0ea6 wp-block-group-is-layout-flex\">\n<p class=\"wp-block-paragraph\">Published on<\/p>\n\n\n<div style=\"line-height:1;margin-top:12px;margin-left:6px\" class=\"wp-block-post-date has-custom-1-font-size\"><time datetime=\"2026-07-01T18:42:01.260Z\">1er juillet 2026<\/time><\/div><\/div>\n\n\n<h1 class=\"is-style-h2-style wp-block-post-title\">Comment les feux d'artifice affectent-ils nos lacs ?<\/h1>\n\n\n<h2 class=\"wp-block-heading is-style-h3-style\">A Study on Lake Michigan Water Quality Using GCxGC-HRMS<\/h2>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\"><figure class=\"is-style-rounded wp-block-post-featured-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"720\" src=\"https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/fireworks-over-chicago-lake-michigan.webp\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"Fireworks over Chicago, IL (USA), taken from Lake Michigan\" style=\"object-fit:cover;\" srcset=\"https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/fireworks-over-chicago-lake-michigan.webp 1280w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/fireworks-over-chicago-lake-michigan-300x169.webp 300w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/fireworks-over-chicago-lake-michigan-1024x576.webp 1024w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/fireworks-over-chicago-lake-michigan-768x432.webp 768w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/fireworks-over-chicago-lake-michigan-18x10.webp 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\"><\/figure><\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-container-core-group-is-layout-1ea9787f wp-block-group-is-layout-constrained\" style=\"margin-top:48px\">\n<div class=\"leco-share-article align-left wp-block-create-block-leco-share-article\">\n\t<div class=\"share-article-wrapper\">\n\t\t<button class=\"share-article-button\" data-url=\"https:\/\/dev26.lecowebtest.com\/fr\/news\/fireworks-and-tourism-impacts-lake-michigan-water-quality\/\" aria-label=\"Share Article\">\n\t\t\tShare Article\t\t<\/button>\n\t\t<span class=\"share-article-copied\" aria-live=\"polite\" aria-atomic=\"true\">\n\t\t\tArticle Link Copied\t\t<\/span>\n\t<\/div>\n<\/div>\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:0\">\n<hr class=\"wp-block-separator has-text-color has-sl-1-color has-alpha-channel-opacity has-sl-1-background-color has-background has-base-100-color has-base-100-background-color is-style-default\" style=\"margin-top:60px;margin-bottom:60px\">\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-container-core-group-is-layout-1ea9787f wp-block-group-is-layout-constrained\" style=\"margin-top:48px\">\n<p class=\"wp-block-paragraph\">As the United States of America celebrates its 250th anniversary, there are sure to be lots of fireworks lighting up the sky this Fourth of July. Americans have been celebrating their Independence Day with fireworks since the very first anniversary of independence from Great Britain in 1777. The tradition has become wildly popular over the years, with people of all ages gathering at homes, parks, beaches, or popular venues to watch these pyrotechnics light up the sky. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nearly <a href=\"https:\/\/www.americanpyro.com\/assets\/docs\/FactsandFigures\/2024\/Fireworks%20Consump.%20Figures%202000-2023.pdf\" data-type=\"link\" data-id=\"https:\/\/www.americanpyro.com\/assets\/docs\/FactsandFigures\/2024\/Fireworks%20Consump.%20Figures%202000-2023.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">300 million pounds of fireworks<\/a> are shot off every year in the United States alone. It is common for many of these fireworks to be lit off near lakes, as the water source is seen as a safety feature in case of unexpected fires. As we think about how many fireworks are being used around the Fourth of July, it raises the question: Does the aftermath of fireworks affect the water quality of our lakes?<\/p>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading is-style-h2-style\" style=\"margin-top:var(--wp--preset--spacing--2-xl)\">Igniting the Fuse: The Setup<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In 2018, LECO chemists set out to answer this question by collecting Lake Michigan water samples before and after fireworks displays. Their plan was to analyze both sets of samples in order to identify chemical changes between the two. If there were an increase in chemical compounds tied directly to fireworks, it would allege that pyrotechnics indeed have a direct impact on water quality during the popular holiday time.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To conduct the analysis, a powerful analytical workflow was used. Solid phase microextraction (SPME) with an SPME Arrow offered an increased sorption volume for efficient sampling of volatile and semi-volatile compounds. For analysis, comprehensive two-dimensional gas chromatography (GCxGC) was utilized for enhanced separation, along with high-resolution mass spectrometry (HRMS) for accurate identification of compounds. This non-targeted approach allowed researchers to detect a wide range of compounds, including those present at trace levels.<\/p>\n<\/div>\n\n\n\n<figure class=\"wp-block-image size-large is-style-rounded-full-width\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/great-lake-beach-goers-sunbathers-summer-tourism-1024x576.webp\" alt=\"Beachgoers, sunbathers, and swimmers, near shorefront homes\" class=\"wp-image-6496\" srcset=\"https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/great-lake-beach-goers-sunbathers-summer-tourism-1024x576.webp 1024w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/great-lake-beach-goers-sunbathers-summer-tourism-300x169.webp 300w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/great-lake-beach-goers-sunbathers-summer-tourism-768x432.webp 768w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/great-lake-beach-goers-sunbathers-summer-tourism-18x10.webp 18w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/great-lake-beach-goers-sunbathers-summer-tourism.webp 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading is-style-h2-style\" style=\"margin-top:var(--wp--preset--spacing--2-xl)\">Explosive Results: <br>Challenging Our Assumptions<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The results of the study were unexpected. While many compounds were uncovered, it was clear that fireworks contributed little to no direct chemical contamination to the water samples. While fireworks are often assumed to introduce pollutants, this analysis did not show significant chemical signatures directly tied to pyrotechnic residue under the conditions studied.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">What the data did show, however, was a staggering increase in compounds associated with personal care products and everyday human activity. From the first sample set to the second, the data showed that more sunscreen, insect repellent, skin conditioners, and fragrances had made their way into the water. It can be assumed that these substances entered the water as beachgoers swam in the lake and gathered along the shoreline during peak holiday traffic.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading is-style-h2-style\" style=\"margin-top:var(--wp--preset--spacing--2-xl)\">The Fall Out: <br>Notable Chemical Changes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">With non-targeted GCxGC-HRMS via the <a href=\"https:\/\/www.leco.com\/products\/pegasus-gcxgc-hrt\/\" data-type=\"link\" data-id=\"https:\/\/www.leco.com\/products\/pegasus-gcxgc-hrt\/\" target=\"_blank\" rel=\"noopener\">Pegasus GC-<\/a><a href=\"https:\/\/dev26.lecowebtest.com\/fr\/instrument\/gc-ms-hrt-haute-resolution\/\" data-type=\"instrument\" data-id=\"2252\">THS <\/a><a href=\"https:\/\/www.leco.com\/products\/pegasus-gcxgc-hrt\/\" data-type=\"link\" data-id=\"https:\/\/www.leco.com\/products\/pegasus-gcxgc-hrt\/\" target=\"_blank\" rel=\"noopener\">4D<\/a> platform, the chemists were able to pinpoint specific compounds that increased after the fireworks shows. This led to significant discoveries, like how some sunscreen-related compounds increased by an eye-opening forty times the initial documented amount, and skin conditioning and cosmetic compounds increased tenfold. There were also several fragrance-related compounds that were newly detected only after the event. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-rounded-full-width\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/03\/pegasus-gc-hrt-high-resolution-tof-ms-1024x576.webp\" alt=\"LECO Pegasus GC-HRT : spectrom\u00e8tre de masse \u00e0 temps de vol haute r\u00e9solution\" class=\"wp-image-5956\" srcset=\"https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/03\/pegasus-gc-hrt-high-resolution-tof-ms-1024x576.webp 1024w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/03\/pegasus-gc-hrt-high-resolution-tof-ms-300x169.webp 300w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/03\/pegasus-gc-hrt-high-resolution-tof-ms-768x432.webp 768w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/03\/pegasus-gc-hrt-high-resolution-tof-ms-18x10.webp 18w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/03\/pegasus-gc-hrt-high-resolution-tof-ms.webp 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Detecting these subtle shifts requires more than conventional techniques. The combination of GCxGC and HRMS offered several key advantages:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Improved separation of complex mixtures, revealing compounds that would overlap in traditional methods.<\/li>\n\n\n\n<li>Excellent mass accuracy, enabling confident molecular formulae calculation to aid in compound annotation.<\/li>\n\n\n\n<li>Non-targeted analysis, allowing detection of both expected and unknown contaminants.<\/li>\n\n\n\n<li>Clear before-and-after comparisons showing how water chemistry evolves during high-traffic events.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This level of insight is critical when analyzing environmental samples with complex and variable compositions.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading is-style-h2-style\" style=\"margin-top:var(--wp--preset--spacing--2-xl)\">The Aftermath: Key Takeaways for Environmental Monitoring<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">While <a href=\"https:\/\/www.bbc.com\/future\/article\/20240703-how-4-july-fireworks-pollute-the-air-and-might-damage-your-health\" target=\"_blank\" rel=\"noreferrer noopener\">fireworks attract attention as potential pollutants<\/a>, this experiment found that consumer products like sunscreens and insect repellents also have a measurable effect. This isn\u2019t to say that people shouldn\u2019t wear sunscreen and bug spray at the beach\u2014sunscreen is especially important for protecting oneself from harmful UV rays. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For environmental scientists and regulators, it indicates that monitoring strategies should consider human activity patterns and that non-targeted analytical methods are essential for capturing transient chemical changes. Non-targeted studies have the ability to subvert chemical expectations and offer an unbiased insight into underlying environmental processes. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By combining world-class instrumentation, such as the <a href=\"https:\/\/dev26.lecowebtest.com\/fr\/instrument\/gc-ms-hrt-haute-resolution\/\" data-type=\"instrument\" data-id=\"2252\">Pegasus GC-HRT 4D<\/a>, with real-world environmental questions, researchers can better understand not just what\u2019s in our water, but why it\u2019s there.<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-container-core-group-is-layout-1ea9787f wp-block-group-is-layout-constrained\" style=\"margin-top:48px\">\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:0\">\n<hr class=\"wp-block-separator has-text-color has-sl-1-color has-alpha-channel-opacity has-sl-1-background-color has-background has-base-100-color has-base-100-background-color is-style-default\" style=\"margin-top:60px;margin-bottom:60px\">\n<\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading is-style-h4-style\">Learn More<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For a technical deep-dive, download the technical poster: <em><a href=\"https:\/\/dev26.lecowebtest.com\/fr\/documents\/lpss-264\/\" data-type=\"document\" data-id=\"6498\">Of Fireworks and Tourism: GCxGC-HRMS Analysis of Summer Impacts on Lake Michigan Water Quality<\/a><\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Visit our <a href=\"https:\/\/dev26.lecowebtest.com\/fr\/application\/environnemental\/\" data-type=\"application\" data-id=\"2055\">Environmental Resource Hub<\/a> for information on how LECO technology supports environmental analysis.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:0\">\n<hr class=\"wp-block-separator has-text-color has-sl-1-color has-alpha-channel-opacity has-sl-1-background-color has-background has-base-100-color has-base-100-background-color is-style-default\" style=\"margin-top:60px;margin-bottom:60px\">\n<\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading is-style-h4-style\">Instruments Used<\/h2>\n\n\n\n<div class=\"leco-card-grid-block wp-block-create-block-leco-card-grid\">\n\t<div class=\"leco-card-grid columns-2\" role=\"list\" aria-label=\"Card grid\">\n\t\t\n\t\t\t\t\t<a href=\"https:\/\/dev26.lecowebtest.com\/fr\/instrument\/gc-ms-hrt-haute-resolution\/\" class=\"leco-card\" role=\"listitem\" aria-label=\"Pegasus HRT Series - Click to learn more\">\n\t\t\n\t\t\t<!-- Card Image -->\n\t\t\t<div class=\"leco-card-image\" role=\"img\" aria-label=\"LECO Pegasus GC-TOF-MS haute r\u00e9solution\">\n\t\t\t\t\t\t\t\t\t<img src=\"https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/03\/leco-pegasus-hrt-high-resolution-gc-tof-ms.webp\" srcset=\"https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/03\/leco-pegasus-hrt-high-resolution-gc-tof-ms-1024x576.webp 1024w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/03\/leco-pegasus-hrt-high-resolution-gc-tof-ms-768x432.webp 768w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/03\/leco-pegasus-hrt-high-resolution-gc-tof-ms-300x169.webp 300w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/03\/leco-pegasus-hrt-high-resolution-gc-tof-ms.webp 1280w\" sizes=\"(max-width: 768px) 100vw, (max-width: 1200px) 50vw, 371px\" alt=\"LECO Pegasus GC-TOF-MS haute r\u00e9solution\" class=\"leco-card-img\" loading=\"lazy\" decoding=\"sync\">\n\t\t\t\t\t\t\t<\/div>\n\n\t\t\t<!-- Card Content -->\n\t\t\t<div class=\"leco-card-content\">\n\t\t\t\t\t\t\t\t\t<h3 class=\"leco-card-title\">\n\t\t\t\t\t\tS\u00e9rie HRT Pegasus\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t<div class=\"leco-card-bottom\">\n\t\t\t\t\t\t\t\t\t\t\t<p class=\"leco-card-description\">\n\t\t\t\t\t\t\tHigh Resolution GC and GCxGC-TOF-MS\t\t\t\t\t\t<\/p>\n\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"leco-card-link\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t<svg class=\"leco-card-arrow\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"44\" height=\"44\" viewbox=\"0 0 44 44\" fill=\"none\" focusable=\"false\">\n\t\t\t\t\t\t\t\t<path d=\"M12.7998 22C12.7998 22.5523 13.2475 23 13.7998 23L27.3857 23L21.7998 28.5859C21.4093 28.9764 21.4093 29.6095 21.7998 30C22.1903 30.3905 22.8234 30.3905 23.2139 30L30.5068 22.7071C30.8973 22.3166 30.8973 21.6834 30.5068 21.2929L23.2139 14C22.8234 13.6095 22.1903 13.6095 21.7998 14C21.4093 14.3905 21.4093 15.0236 21.7998 15.4141L27.3857 21L13.7998 21C13.2475 21 12.7998 21.4477 12.7998 22Z\" fill=\"#78543D\"><\/path>\n\t\t\t\t\t\t\t<\/svg>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\n\t\t\t\t\t<\/a>\n\t\t\n\t\t\t<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-container-core-group-is-layout-7d5f9c92 wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group has-global-padding is-layout-constrained wp-block-group-is-layout-constrained\" style=\"margin-top:0\">\n<hr class=\"wp-block-separator has-text-color has-sl-1-color has-alpha-channel-opacity has-sl-1-background-color has-background has-base-100-color has-base-100-background-color is-style-default\" style=\"margin-top:60px;margin-bottom:60px\">\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading is-style-h4-style\">Nouvelles connexes<\/h2>\n\n\n\n<div class=\"wp-block-query is-layout-flow wp-block-query-is-layout-flow\"><ul class=\"columns-3 wp-block-post-template is-layout-grid wp-container-core-post-template-is-layout-1d17308c wp-block-post-template-is-layout-grid\"><li class=\"wp-block-post post-6807 post type-post status-publish format-standard has-post-thumbnail hentry category-news instrument-model-60 core-analysis-type-sulfur application-type-high-performance-materials application-type-metals-ores product-line-elemental-analysis\">\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><figure style=\"aspect-ratio:16\/9\" class=\"wp-block-post-featured-image\"><a href=\"https:\/\/dev26.lecowebtest.com\/fr\/news\/sulfur-and-superalloys-the-844-series\/\" target=\"_self\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"600\" src=\"https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/underside-of-jet-engine-commercial-aircraft.png\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"Superalliages et soufre : m\u00eame des traces peuvent \u00eatre pr\u00e9judiciables\" style=\"width:100%;height:100%;object-fit:cover;\" srcset=\"https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/underside-of-jet-engine-commercial-aircraft.png 1800w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/underside-of-jet-engine-commercial-aircraft-300x100.png 300w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/underside-of-jet-engine-commercial-aircraft-1024x341.png 1024w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/underside-of-jet-engine-commercial-aircraft-768x256.png 768w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/underside-of-jet-engine-commercial-aircraft-1536x512.png 1536w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/underside-of-jet-engine-commercial-aircraft-18x6.png 18w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\"><\/a><\/figure>\n\n<h4 style=\"font-style:normal;font-weight:300\" class=\"has-link-color wp-elements-25e6d450634c6f6ce866507b40ad7ad3 wp-block-post-title has-text-color has-dm-8-color has-medium-font-size has-rothek-font-family\"><a href=\"https:\/\/dev26.lecowebtest.com\/fr\/news\/sulfur-and-superalloys-the-844-series\/\" target=\"_self\">Superalliages et soufre : m\u00eame des traces peuvent \u00eatre pr\u00e9judiciables<\/a><\/h4>\n\n<div class=\"wp-block-post-date\"><time datetime=\"2026-07-01T18:42:01.287Z\">1er juillet 2026<\/time><\/div><\/div>\n\n<\/li><li class=\"wp-block-post post-6492 post type-post status-publish format-standard has-post-thumbnail hentry category-news\">\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><figure style=\"aspect-ratio:16\/9\" class=\"wp-block-post-featured-image\"><a href=\"https:\/\/dev26.lecowebtest.com\/fr\/news\/fireworks-and-tourism-impacts-lake-michigan-water-quality\/\" target=\"_self\"><img loading=\"lazy\" decoding=\"async\" width=\"1280\" height=\"720\" src=\"https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/fireworks-over-chicago-lake-michigan.webp\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"Comment les feux d&#039;artifice affectent-ils nos lacs ?\" style=\"width:100%;height:100%;object-fit:cover;\" srcset=\"https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/fireworks-over-chicago-lake-michigan.webp 1280w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/fireworks-over-chicago-lake-michigan-300x169.webp 300w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/fireworks-over-chicago-lake-michigan-1024x576.webp 1024w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/fireworks-over-chicago-lake-michigan-768x432.webp 768w, https:\/\/dev26.lecowebtest.com\/wp-content\/uploads\/2026\/07\/fireworks-over-chicago-lake-michigan-18x10.webp 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\"><\/a><\/figure>\n\n<h4 style=\"font-style:normal;font-weight:300\" class=\"has-link-color wp-elements-25e6d450634c6f6ce866507b40ad7ad3 wp-block-post-title 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