Siriporn Borrirukwisitsak - Academia.edu (original) (raw)

Papers by Siriporn Borrirukwisitsak

Research paper thumbnail of The use of relative potential risk as a prioritization tool for household WEEE management in Thailand

Waste electrical and electronic equipment (WEEE) has become one of the major global concerns in s... more Waste electrical and electronic equipment (WEEE) has become one of the major global concerns in solid waste management due to its continuously increasing volume and adverse effects on the environment and human health. This study aims to use the relative potential risk as a specific device to prioritize 8 WEEE types in Thailand based on contents and toxicity of toxic metals in printed circuit boards (PCBs), including arsenic, cadmium, chromium, copper, and lead, in terms of potential harm indicator (PHI) and quantity of PCBs. The results indicated that the most significant type of WEEE based on relative potential risk is liquid crystal display television, while the least significant types of WEEE are refrigerator and washing machine. However, PCBs also contain precious metals (gold, silver, and palladium) which are crucial for WEEE recycling economy. Thus, the ratio between precious metals and toxic heavy metal was determined as a simple tool to assess the cost and benefit. According...

Research paper thumbnail of Effect of climate change on the environmental fate, bioavailability, bioaccumulation and toxicity of bisphenol A in the marine environment

Research paper thumbnail of Effects of salinity pH and temperature on the Octanol-water partition co-efficient of Bisphenol A

Bisphenol A (BPA) has been widely used as an industrial plasticizer and is considered an endocrin... more Bisphenol A (BPA) has been widely used as an industrial plasticizer and is considered an endocrine disrupting chemical (EDC). BPA can be released into the aquatic environment and magnify in the food chain, resulting in human exposure. To understand and predict the environmental fate and toxicity in the aquatic environment, the octanol-water partition coefficient (K ow) was determined at various salinity, pH and temperatures using the OECD guideline 107 shake flask method. With increasing salinity the log K ow of BPA at 25˚C increased from 3.44 to 3.55. The log K ow also changed at different pH, it decreased at pH > pK a, at pH between 6 and 8 a small increase (from 3.39-3.47) was observed which was then followed by a decrease at pH 10 (to 2.99). Increasing temperatures (between 25°C and 45°C) affect log K ow leading to decreased log K ow values (3.42 to 3.18). The log K ow for the natural seawater (salinity 29 psu and pH 8) was also determined at 3.52. The experimental and the default values were input into the prediction program EPI Suite ™ , which was used to assess environmental fate and toxicity of BPA. Using the experimental values enables a more accurate model for site specific samples can be defined. The model using the experimental K ow values of natural seawater indicated higher bioaccumulation and higher sediment adsorption but slightly lower aquatic toxicity than the default values. These findings imply that BPA in the marine environment is more bioaccumulative therefore has a greater biomagnification potential in fish species, particularly benthic feeders. This may adversely impact on human health and prove detrimental to humans that consume these marine species compared to similar species from a freshwater environment.

Research paper thumbnail of Phytoremediation of BTEX contaminated soil by Canna×generalis

Ecotoxicology and Environmental Safety, 2011

Bioaccumulation experiments showed that the canna (Canna  generalis) could accumulate BTEX (benz... more Bioaccumulation experiments showed that the canna (Canna  generalis) could accumulate BTEX (benzene, toluene, ethylbenzene and xylenes) from root zone and rhizome zone soil and translocate these compounds to the shoot. A comparison among these compounds showed that the sequences for accumulation in the root, rhizome and shoot were strongly related to their physicochemical properties (i.e. K ow values and molecular weight). For removal efficiency, the canna could remove about 80% of BTEX in the root zone and rhizome zone soil in 21 days. In addition, the removal efficiency in BTEX contaminated soil with 40% water content was a little higher than that found with 20% soil water content. This result indicated that the soil water content should also be considered when phytoremediation is employed.

Research paper thumbnail of The use of relative potential risk as a prioritization tool for household WEEE management in Thailand

Waste electrical and electronic equipment (WEEE) has become one of the major global concerns in s... more Waste electrical and electronic equipment (WEEE) has become one of the major global concerns in solid waste management due to its continuously increasing volume and adverse effects on the environment and human health. This study aims to use the relative potential risk as a specific device to prioritize 8 WEEE types in Thailand based on contents and toxicity of toxic metals in printed circuit boards (PCBs), including arsenic, cadmium, chromium, copper, and lead, in terms of potential harm indicator (PHI) and quantity of PCBs. The results indicated that the most significant type of WEEE based on relative potential risk is liquid crystal display television, while the least significant types of WEEE are refrigerator and washing machine. However, PCBs also contain precious metals (gold, silver, and palladium) which are crucial for WEEE recycling economy. Thus, the ratio between precious metals and toxic heavy metal was determined as a simple tool to assess the cost and benefit. According...

Research paper thumbnail of Effect of climate change on the environmental fate, bioavailability, bioaccumulation and toxicity of bisphenol A in the marine environment

Research paper thumbnail of Effects of salinity pH and temperature on the Octanol-water partition co-efficient of Bisphenol A

Bisphenol A (BPA) has been widely used as an industrial plasticizer and is considered an endocrin... more Bisphenol A (BPA) has been widely used as an industrial plasticizer and is considered an endocrine disrupting chemical (EDC). BPA can be released into the aquatic environment and magnify in the food chain, resulting in human exposure. To understand and predict the environmental fate and toxicity in the aquatic environment, the octanol-water partition coefficient (K ow) was determined at various salinity, pH and temperatures using the OECD guideline 107 shake flask method. With increasing salinity the log K ow of BPA at 25˚C increased from 3.44 to 3.55. The log K ow also changed at different pH, it decreased at pH > pK a, at pH between 6 and 8 a small increase (from 3.39-3.47) was observed which was then followed by a decrease at pH 10 (to 2.99). Increasing temperatures (between 25°C and 45°C) affect log K ow leading to decreased log K ow values (3.42 to 3.18). The log K ow for the natural seawater (salinity 29 psu and pH 8) was also determined at 3.52. The experimental and the default values were input into the prediction program EPI Suite ™ , which was used to assess environmental fate and toxicity of BPA. Using the experimental values enables a more accurate model for site specific samples can be defined. The model using the experimental K ow values of natural seawater indicated higher bioaccumulation and higher sediment adsorption but slightly lower aquatic toxicity than the default values. These findings imply that BPA in the marine environment is more bioaccumulative therefore has a greater biomagnification potential in fish species, particularly benthic feeders. This may adversely impact on human health and prove detrimental to humans that consume these marine species compared to similar species from a freshwater environment.

Research paper thumbnail of Phytoremediation of BTEX contaminated soil by Canna×generalis

Ecotoxicology and Environmental Safety, 2011

Bioaccumulation experiments showed that the canna (Canna  generalis) could accumulate BTEX (benz... more Bioaccumulation experiments showed that the canna (Canna  generalis) could accumulate BTEX (benzene, toluene, ethylbenzene and xylenes) from root zone and rhizome zone soil and translocate these compounds to the shoot. A comparison among these compounds showed that the sequences for accumulation in the root, rhizome and shoot were strongly related to their physicochemical properties (i.e. K ow values and molecular weight). For removal efficiency, the canna could remove about 80% of BTEX in the root zone and rhizome zone soil in 21 days. In addition, the removal efficiency in BTEX contaminated soil with 40% water content was a little higher than that found with 20% soil water content. This result indicated that the soil water content should also be considered when phytoremediation is employed.