High surface area activated carbon was prepared from waste tobacco after extracting nicotine with microbial enzymatic and chemical activation. Surface properties of the prepared carbons were performed using nitrogen adsorption, and the adsorption behavior of the prepared carbons under different operation conditions on methyl orange was investigated by a batch adsorption experiment. The experimental results show that: using waste tobacco 5.0035g and white- rot fungi volume is 2.0ml, under the conditions of enzymatic time of 36h, activation temperature at 600°C and activation time of 2h, the concentration of ZnCl2 activation is 20%,The BET surface area of carbons prepared reach 1356.53m2/g, the average aperture is3.78nm, and the hole dimension is0.17 ml/g. The adsorption amount on methyl orange of 43mg/L reach 4979.31mg/g, and it show high adsorption capacity.

In this paper the fine triangle intersection problem for a pair of maximum kite packings is investigated. Let F in(v) = {(s, t) : ∃ a pair of maximum kite packings of order v intersecting in s blocks and s + t triangles}. Let Adm(v) = {(s, t) : s + t ≤ b v , s, t are non-negative integers}, where binteger v ≡ 0, 1 (mod 8) and v ≥ 8; F in(v) = Adm(v) for any integer v ≡ 2, 3, 4, 5, 6, 7 (mod 8) and v ≥ 4.Keywords: kite packing; triangle intersection; fine triangle intersection from three undecided values for v = 25, 28 and 37. Billington and Kreher [3] completed the intersection problem for all connected simple graphs G where the minimum of the number of vertices and the number of edges of G is not bigger than 4. The intersection problem is also considered for many other types of combinatorial structures. The interested reader may refer to [1,2,5,10,11, 15,16,17].Let B be a simple graph. Denote by T (B) the set of all triangles of the graph B. For example, if B is the graph with vertices a, b, c, d and edges ab, ac, bc, cd, (such a graph is called a kite), thenThe triangle intersection problem for (K v , G)-packings (or coverings) is the determination of all integer pairs (v, t) such that there exists a pair of (K v , G)-packings (or coverings) intersecting in t triangles. The triangle intersection problem was first considered by Lindner and Yazici in [20], who made a complete solution to the triangle intersection problem for kite systems. Billington et al. [4] solved the triangle intersection problem for (K 4 − e)-designs. Chang et al. [6] investigated the triangle intersection problem for S(2, 4, v)s.Every block B in a (K v , G)-packing (or covering) contributes |T (B)| = |T (G)| triangles. If two (K v , G)-packings (or coverings) (X, B 1 ) and (X, B 2 ) intersect in s blocks, then they intersect in at least s|T (G)| triangles. It is natural to ask how about the triangle intersection problem for a pair of (K v , G)-packings (or coverings) intersecting in s blocks. Thus the fine triangle intersection problem was introduced inChang et al. has completely solved the fine triangle intersection problems for kite systems [7] and (K 4 − e)-designs [8,9]. The purpose of this paper is to example the fine triangle intersection problem for maximum kite packings. In what follows we always write F in G (v) simply as F in(v) when G is a kite, that is, F in(v) = {(s, t) : ∃ a pair of maximum kite packings of order v intersecting in s blocks and t + s triangles}. It is known that for any positive integer v there is a maximum kite packings of order v with ⌊v(v − 1)/8⌋ blocks [12].Since every block in a maximum kite packing contributes only one triangle, we have that F in(v) ⊆ Adm(v). In the following we always denote the copy of the kite with vertices a, b, c, d and edges ab, ac, bc, cd by [a, b, c − d].Example 1.1 F in(4) = Adm(4).Proof Take the vertex set X = {0, 1, 2, 3}. Let B = {[0, 1, 3 − 2]}. Then (X, B) is a maximum kite packing of order 4. Consider the following permutations on X. π 0,0 = (2 3), π 0,1 = (0 1 3), π 1,0 ...

Potassium ferrate has good application prospect in water treatment owing to its strong oxidation in the entire pH range and its decomposition Fe3+ with the characteristics of non-toxic and good coagulation effect of flocculation, etc. In this paper, the main material is calcium hypochlorite, which is used to optimize the preparation of potassium ferrate by traditional hypochlorite oxidation methods without applying chlorine in addition. XRD and IR were used to characterize the final product-potassium ferrate; while the concentration of potassium ferrate solution is determined using direct spectrophotometric method for quantitative analysis during the reaction system. The results show that the reaction temperature 25 °C, re-crystallization temperature -5 °C and reaction time 40 minutes will make yield up to 80% and the purity of the product to 97%. As the representitive substance of polycyclic aromatic hydrocarbon (PAHs), Phenanthrene can be used as target object in the analysis of K2FeO4’ oxidation property when pH is 9.5 and illuminated by xenon lamp. The result shows that as reaction concentration is 10mg/L, phenanthrene’s degradation effect becomes very obvious while accumilative degradation ratio reaches up to 65.5% after 60 mins of system reaction.

In this paper, electrolysis and hypochlorite oxidation methods are adopted for the preparation of potassium ferrate, focusing on increasing the production yield and product’s purity. The oxidation of benzopyrene by potassium ferrate was investigated. The yield of potassium ferrate prepared with hypochlorite at optimized conditions is 21% higher than that of using electrolysis method. With the presence of hypochlorite, various conditions of oxidation reaction were determined as following: reaction temperature 25°C, re-crystallization temperature of -5 °Cand reaction time 40 minutes, which all contribute a yield of 80%. Spectrophotometric was used to analyze the purity of the product, which was measured up to 97%. XRD and IR were used to characterize the final product. The aqueous stability of potassium ferrate at various pH values was investigated. It was found that potassium ferrate solution had a maximum stability at pH 9-10.5. With three-dimensional excitation emission matrix fluorescence spectrosopy technique, the reaction of ferrate and benzopyrene (BaP) in aqueous phase which is a representative polycyclic aromatic hydrocarbon, was also investigated. The maximum degradation (49.5%) of BaP was gained at conditions of pH 9.5, Fe(VI): BaP molar ratio of 1:5, reaction time of 3 hours.