Pengaruh penggunaan lumpur limbah industri penyamakan kulit terhadap penyerapan krom pada tanaman sawi

The aims of research was to study the effect of contaminated soil with tannery industrial wastesludge, and absorption level of chromium by the green mustard. The experiment was carried out in Kayen, Sleman, Yogyakarta for 3 months. The form of a pot experiment using a full factorial design 2x3 and 2 additional treatments as a control was set out in Completely Randomized Design (CRD), using 15 units of pots as replicates. The first factor consists of two varieties of mustard, which is kailan (chinesse kale) and spoon mustard greens (pak choy green). The second factor consists of 3 doses of leather tanning industry waste, i.e 500 mg chromium/kg soil, 1000 mg chromium/kg soil, 1500 mg chromium/kg soil. Control treatment was the planting of two varieties of mustard without the addition of sewage sludge. Preparation of sewage sludge was carried out by mixing the sewage sludge into the planting medium consisting of a mixture of soil, compost and manure treatments in accordance with the treatment. Observations made by harvesting the plants at the age of 3 and 6 weeks after planting for the next shoots and roots of plants and chromium content of growing media was analyzed. The results showed that the accumulation of chromium in the roots of plants was greater than in the plant canopy for the two types of mustards either good harvested at the age of 3 or 6 weeks after planting, and the content of chromium in plant tissues of mustard as part of vegetable that generally consumed exceeds the threshold of human daily consumption (0,035 mg/kg daily consumption).