{"id":3301,"date":"2026-10-25T13:26:56","date_gmt":"2026-10-25T06:26:56","guid":{"rendered":"https:\/\/synbioid.com\/?p=3301"},"modified":"2026-10-25T13:26:57","modified_gmt":"2026-10-25T06:26:57","slug":"h2s-dasar-tambak-bentuk-sulfida","status":"publish","type":"post","link":"https:\/\/synbioid.com\/en\/h2s-dasar-tambak-bentuk-sulfida\/","title":{"rendered":"H\u2082S di Dasar Tambak: Mengapa pH Mengubah Bentuk Sulfida?"},"content":{"rendered":"<p>Air permukaan tampak biasa, tetapi endapan di dasar tambak mulai menggelap. Ketika muncul dugaan sulfida, pertanyaan berikutnya sering langsung mengarah pada bahan penanganan. Padahal, tim perlu memahami lebih dahulu apa yang sedang terbentuk dan apa sebenarnya yang diukur.<\/p>\n<p>H\u2082S di dasar tambak berkaitan dengan kondisi sedimen dan kimia air. Warna lumpur dapat menjadi alasan untuk memeriksa lebih lanjut, tetapi tidak memberikan angka konsentrasi H\u2082S.<\/p>\n<h2>Mengapa sulfida dapat terbentuk di dasar?<\/h2>\n<p>Pada lingkungan tanpa oksigen, mikroorganisme tertentu dapat mereduksi sulfat menjadi sulfida. WHO menjelaskan proses tersebut sebagai bagian dari perubahan senyawa sulfur dalam air anaerob. Sulfat dan sulfida merupakan bentuk kimia berbeda; keberadaan sulfat tidak otomatis berarti air mengandung H\u2082S dalam konsentrasi berbahaya. [1]<\/p>\n<p>Dalam konteks budidaya, FAO menghubungkan keberadaan H\u2082S dengan penguraian bahan organik dan kondisi dasar yang kekurangan oksigen. FAO juga melaporkan bahwa air di sela sedimen dapat memiliki konsentrasi berbeda dari air kolam di atasnya. Karena itu, hasil sampel permukaan belum tentu menggambarkan keadaan di dalam endapan. [2]<\/p>\n<h2>H\u2082S dan HS\u207b berada dalam kesetimbangan<\/h2>\n<p>Sulfida terlarut dapat berada dalam beberapa bentuk. Dua bentuk penting untuk pembahasan ini adalah hidrogen sulfida tak terionisasi, <strong>H\u2082S<\/strong>, dan ion hidrosulfida, <strong>HS\u207b<\/strong>. Hubungannya dapat ditulis:<\/p>\n<p><strong>H\u2082S \u21cc H\u207a + HS\u207b<\/strong><\/p>\n<p>Panah dua arah menunjukkan kesetimbangan. Ketika pH turun, proporsi H\u2082S meningkat; ketika pH naik, proporsi HS\u207b meningkat. Perubahan bentuk ini tidak dengan sendirinya menghilangkan sulfur dari sistem. [1,3]<\/p>\n<p>Sebagai contoh konseptual, dua sampel dengan jumlah sulfida terlarut yang sama dapat memiliki proporsi H\u2082S berbeda apabila pH-nya berbeda. Suhu dan salinitas juga memengaruhi kesetimbangan. Tabel atau rumus air tawar karena itu tidak boleh langsung diterapkan pada tambak payau tanpa memeriksa kesesuaiannya. [3]<\/p>\n<h2>Baca nama parameter sebelum membandingkan angka<\/h2>\n<p>Pedoman kualitas air Australia\u2013Selandia Baru menjelaskan bahwa toksisitas sulfida terutama berkaitan dengan bentuk H\u2082S tak terionisasi. Pedoman tersebut juga membedakan pelaporan sulfida total dari H\u2082S, termasuk kemungkinan penggunaan dasar massa sulfur atau H\u2082S. [3]<\/p>\n<p>Saat menerima hasil pengujian, tanyakan:<\/p>\n<ul>\n<li>Apakah parameter yang dilaporkan merupakan sulfida total atau H\u2082S?<\/li>\n<li>Apakah angka berasal dari pengukuran langsung atau perhitungan?<\/li>\n<li>Apa satuan dan dasar pelaporannya?<\/li>\n<li>Dari lokasi serta kedalaman mana sampel diambil?<\/li>\n<li>Apakah pH, suhu, dan salinitas yang digunakan sesuai dengan sampel?<\/li>\n<\/ul>\n<p>Daftar ini merupakan usulan pemeriksaan dokumen. Ikuti petunjuk laboratorium untuk wadah, pengambilan, pengawetan, dan pengiriman sampel.<\/p>\n<h2>Mengubah pH belum tentu menyelesaikan sumber masalah<\/h2>\n<p>Pergeseran menuju HS\u207b tidak sama dengan menghilangkan sulfida. Penelitian Torun dan rekan-rekan pada sistem inkubasi limbah tambak membedakan pengaruh perubahan pH dari proses lain yang menurunkan akumulasi H\u2082S. Percobaan tersebut memakai kondisi terkontrol, sehingga hasilnya tidak dapat langsung dijadikan dosis perlakuan untuk tambak produksi. [4]<\/p>\n<p>Sebagai langkah evaluasi internal, hubungkan temuan dasar dengan lokasi penumpukan endapan, riwayat pakan, kondisi aerasi, serta pekerjaan yang baru dilakukan. Gunakan informasi itu untuk membahas penyebab dan rencana penanganan bersama penanggung jawab teknis.<\/p>\n<h2>Jangan memakai bau sebagai alat ukur<\/h2>\n<p>H\u2082S dikenal memiliki bau telur busuk. Namun, NIOSH memperingatkan bahwa indra penciuman dapat cepat kehilangan kepekaan dan tidak dapat diandalkan untuk memperingatkan keberadaan H\u2082S secara terus-menerus. Jangan sengaja mendekatkan wajah ke lumpur atau wadah sampel untuk mengujinya dengan penciuman. [5]<\/p>\n<p>Saat mengevaluasi sulfida, pisahkan tiga hal: petunjuk lapangan, hasil pengujian, dan penjelasan kimianya. Dengan begitu, keputusan penanganan memiliki dasar yang dapat diperiksa kembali.<\/p>\n<h2>Referensi<\/h2>\n<ol>\n<li>WHO \u2014 <a href=\"https:\/\/cdn.who.int\/media\/docs\/default-source\/wash-documents\/wash-chemicals\/hydrogensulfide-bd.pdf?sfvrsn=2f03ad98_4\">Hydrogen Sulfide in Drinking-water<\/a>. Rujukan kimia lingkungan, bukan ambang budidaya.<\/li>\n<li>FAO \u2014 <a href=\"https:\/\/www.fao.org\/4\/ac175e\/AC175E11.htm\">Site Selection for Aquaculture: Hydrogen Sulfide<\/a>.<\/li>\n<li>Australian and New Zealand Guidelines \u2014 <a href=\"https:\/\/www.waterquality.gov.au\/anz-guidelines\/guideline-values\/default\/water-quality-toxicants\/toxicants\/sulfides-2000\">Sulfides in Freshwater and Marine Water<\/a>.<\/li>\n<li>Torun, F., dkk. (2020) \u2014 <a href=\"https:\/\/biblio.ugent.be\/publication\/8645362\">Nitrate Amendment to Control Sulphide Accumulation in Shrimp Ponds<\/a>, <em>Aquaculture<\/em>, 521, 735010.<\/li>\n<li>CDC\/NIOSH \u2014 <a href=\"https:\/\/www.cdc.gov\/niosh\/npg\/npgd0337.html\">Pocket Guide to Chemical Hazards: Hydrogen Sulfide<\/a>.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Penjelasan tentang pembentukan sulfida di dasar tambak, pengaruh pH terhadap bentuk H\u2082S, serta cara membedakan hasil pengujian dari petunjuk visual.<\/p>","protected":false},"author":4,"featured_media":3304,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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