Mangroves have been investigated widely as plants that can absorb and accumulate heavy metals in their tissues. Due to that ability, mangroves have been used to reduce heavy metals in the aquatic environment. Furthermore, mangroves have been used for biomonitoring of heavy metals pollution. The use of mangroves for biomonitoring on aquatic environments has been considered as a cheap, rapid, and sufficient method. The mangrove is an organism that has the ability to absorb the contaminants of heavy metal and to function as fine pollutants trap. However, to develop this technique for wide use, research and investigation are still needed. This paper is aimed to describe the future direction of mangrove studies of using mangroves as a biomonitoring agent. Based on the review, Rhizophopora mucronata and Avicennia marina are mangrove species that have a promising ability to be used for biomonitoring in the aquatic environment.
Indonesia is one of the countries with the largest Au deposited. Gold mining has been the backbone of Indonesia’s economy. However, Indonesia also faces huge problems of Artisanal and Small Scale Gold Mining (ASGM) in a number of areas of Indonesia. A number of problems follow this Au mining method, including environmental, social and economic problems. Green innovation and technologies are needed to solve the problems. To date, Au agromining has been considered as a technology that can solve the numerical problems of Au conventional mining in the sector mentioned before. Gold agromining also has been proposed as a solution for the ASGM problem in Indonesia. However, until now, there have been no reports on the use of Au agromining technology in Indonesia. In fact, agromining research has been very advanced and is considered very prospective. This paper outlines the potentials of Au agromining to be implemented in Indonesia to overcome the social and environmental problems of ASGM.
In the recent time, phytoremediation became an emerging remediation technology due to its low costs and high sustainability. For the remediation of a contaminated mining site with low to medium heavy metal (HM) concentrations, experiments for the phytoextraction and growth behaviour of Helianthus tuberosus were performed. pH and HM concentrations were identified as crucial factors for plant growth and success of phytoremediation. In these experiments, optimal conditions for the plant growth and for the success of phytoremediation were investigated. Plant experiments were carried out in a pH range stepwise from 4.0 – 6.0 and with a combination of different HM (Cd, Cu, Fe, Mn, Ni, Zn, Pb) in three different concentration ranges (slight/ middle/ high); experimental conditions were typical for mining sites with AMD and slight to medium heavy metal impact. Yields of roots, tubers, leaves and shoots under the appropriate conditions were investigated, and the HM accumulation of different plant parts was analyzed. High accumulation of Fe (up to 1.48 g/kg), Mn (up to 1.68 g/kg) and Zn (up to 853 mg/kg) was measured in roots; shoots accumulated up to 2.6 g/kg Ni, 11.4 g/kg Mn and 6.06g/kg Zn. The accumulation factors for main heavy metals are given in the paper. The further utilization of tubers by fermentation was not inhibited for field site HM concentrations. As results, H. tuberosus represents a suitable phytoremediation plant species for the phytoextraction of Fe, Mn, Zn, Cd and Ni.
Peningkatan jumlah penduduk di Indonesia akan menyebabkan meningkatnya aktivitas rumah tangga yang menjadi sumber pencemaran lingkungan. Limbah cair rumah tangga di Desa Lamglumpang, Kecamatan Ulee Kareng, Kota Banda Aceh mengandung parameter pencemar yang melebihi standar baku mutu berdasarkan parameter COD, TSS, pH dan kekeruhan. Magnetit berpotensi dijadikan sebagai adsorben dalam pengolahan limbah cair domestik. Penelitian ini bertujuan untuk mengetahui kemampuan adsorben magnetit. Eksperimen adsorpsi dilakukan dengan variasi massa magnetit 1, 3 dan 5 gr dan waktu kontak adsorpsi 6, 8 dan 10 jam dengan kecepatan putar 150 rpm dan tanpa pengadukan. Hasil penelitian menunjukkan bahwa massa adsorben, waktu kontak dan kecepatan putar mempengaruhi efektivitas adsorpsi. Magnetit efektif dalam menurunkan kadar COD mencapai 90,96% pada variasi massa 5 gram dengan waktu kontak 8 jam dengan kecepatan putar 150 rpm, TSS mencapai 94,51% pada variasi massa 1 gram dengan waktu kontak 10 jam dengan kecepatan putar 150 rpm, pH mencapai 30,88% pada variasi massa 3 gram dengan 5 gram dan waktu kontak 10 jam dengan kecepatan putar 150 rpm dan kekeruhan mencapai 90,39% pada variasi massa 1 gram dengan waktu kontak 10 jam dengan kecepatan putar 150 rpm. Hasil ini menunjukkan magnetit potensial digunakan dalam pengolahan limbah cair domestik.
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