The creation of a recycling-oriented society that follows the 3Rs (Reduce, Reuse, and Recycle) has become a global necessity. To achieve the 3Rs, contamination must be reduced; specifically, material reuse is unsafe unless it is contaminated to a low level. Soil contaminated with heavy metals, for example, cannot be used as a base material for plant growth because the contamination level exceeds the standard value. Heavy metal-injected wood was once used in buildings due to its resistance to termite attack. It has degraded into construction waste in this day and age. If not treated, the disposal of this wood may endanger the environment. In this study, we first used rice husk charcoal to reduce the mercury content in mine soil and then confirmed its impact on plants. The chromium was then adsorbed and separated from an elution model solution of wood containing chromium-copper-arsenic food using carbonized grape peel as an adsorbent. The copper was then separated using a biopolymer made by saponifying the peel of a mandarin orange. Finally, arsenic was absorbed by a biopolymer derived from chemically modifying zirconia. This study discovered that using biomass charcoal (rice husks) to fix the amount of mercury in the soil has little effect on plants. Furthermore, the use of biomass charcoal (sulfuric acid heat treatment of grape peels), saponified biomass polymers (orange skins), and chemical modifications (zirconium) assisted in the separation of chromium, copper, and arsenic in the chromate copper arsenate-treated wood leachate.
Author (s) Details
Dr. Gusmini
Department of Soil Science, University of Andalas, Padang, Indonesia.
Endar Hidayat
Department of Environmental Science, Prefectural University of Hiroshima, Japan.
Hiroyuki Harada
Department of Environmental Science, Prefectural University of Hiroshima, Japan.
Katsutoshi Inoue
Department of Applied Chemistry, Saga University, Japan.
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